| /* |
| Copyright (C) Intel Corp. 2006. All Rights Reserved. |
| Intel funded Tungsten Graphics to |
| develop this 3D driver. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice (including the |
| next paragraph) shall be included in all copies or substantial |
| portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| |
| **********************************************************************/ |
| /* |
| * Authors: |
| * Keith Whitwell <keithw@vmware.com> |
| */ |
| |
| |
| #include "brw_context.h" |
| #include "brw_defines.h" |
| #include "brw_eu.h" |
| |
| #include "util/ralloc.h" |
| |
| /** |
| * Prior to Sandybridge, the SEND instruction accepted non-MRF source |
| * registers, implicitly moving the operand to a message register. |
| * |
| * On Sandybridge, this is no longer the case. This function performs the |
| * explicit move; it should be called before emitting a SEND instruction. |
| */ |
| void |
| gen6_resolve_implied_move(struct brw_codegen *p, |
| struct brw_reg *src, |
| unsigned msg_reg_nr) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| if (devinfo->gen < 6) |
| return; |
| |
| if (src->file == BRW_MESSAGE_REGISTER_FILE) |
| return; |
| |
| if (src->file != BRW_ARCHITECTURE_REGISTER_FILE || src->nr != BRW_ARF_NULL) { |
| brw_push_insn_state(p); |
| brw_set_default_exec_size(p, BRW_EXECUTE_8); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_MOV(p, retype(brw_message_reg(msg_reg_nr), BRW_REGISTER_TYPE_UD), |
| retype(*src, BRW_REGISTER_TYPE_UD)); |
| brw_pop_insn_state(p); |
| } |
| *src = brw_message_reg(msg_reg_nr); |
| } |
| |
| static void |
| gen7_convert_mrf_to_grf(struct brw_codegen *p, struct brw_reg *reg) |
| { |
| /* From the Ivybridge PRM, Volume 4 Part 3, page 218 ("send"): |
| * "The send with EOT should use register space R112-R127 for <src>. This is |
| * to enable loading of a new thread into the same slot while the message |
| * with EOT for current thread is pending dispatch." |
| * |
| * Since we're pretending to have 16 MRFs anyway, we may as well use the |
| * registers required for messages with EOT. |
| */ |
| const struct gen_device_info *devinfo = p->devinfo; |
| if (devinfo->gen >= 7 && reg->file == BRW_MESSAGE_REGISTER_FILE) { |
| reg->file = BRW_GENERAL_REGISTER_FILE; |
| reg->nr += GEN7_MRF_HACK_START; |
| } |
| } |
| |
| /** |
| * Convert a brw_reg_type enumeration value into the hardware representation. |
| * |
| * The hardware encoding may depend on whether the value is an immediate. |
| */ |
| unsigned |
| brw_reg_type_to_hw_type(const struct gen_device_info *devinfo, |
| enum brw_reg_type type, enum brw_reg_file file) |
| { |
| if (file == BRW_IMMEDIATE_VALUE) { |
| static const int imm_hw_types[] = { |
| [BRW_REGISTER_TYPE_UD] = BRW_HW_REG_TYPE_UD, |
| [BRW_REGISTER_TYPE_D] = BRW_HW_REG_TYPE_D, |
| [BRW_REGISTER_TYPE_UW] = BRW_HW_REG_TYPE_UW, |
| [BRW_REGISTER_TYPE_W] = BRW_HW_REG_TYPE_W, |
| [BRW_REGISTER_TYPE_F] = BRW_HW_REG_TYPE_F, |
| [BRW_REGISTER_TYPE_UB] = -1, |
| [BRW_REGISTER_TYPE_B] = -1, |
| [BRW_REGISTER_TYPE_UV] = BRW_HW_REG_IMM_TYPE_UV, |
| [BRW_REGISTER_TYPE_VF] = BRW_HW_REG_IMM_TYPE_VF, |
| [BRW_REGISTER_TYPE_V] = BRW_HW_REG_IMM_TYPE_V, |
| [BRW_REGISTER_TYPE_DF] = GEN8_HW_REG_IMM_TYPE_DF, |
| [BRW_REGISTER_TYPE_HF] = GEN8_HW_REG_IMM_TYPE_HF, |
| [BRW_REGISTER_TYPE_UQ] = GEN8_HW_REG_TYPE_UQ, |
| [BRW_REGISTER_TYPE_Q] = GEN8_HW_REG_TYPE_Q, |
| }; |
| assert(type < ARRAY_SIZE(imm_hw_types)); |
| assert(imm_hw_types[type] != -1); |
| assert(devinfo->gen >= 8 || type < BRW_REGISTER_TYPE_DF); |
| return imm_hw_types[type]; |
| } else { |
| /* Non-immediate registers */ |
| static const int hw_types[] = { |
| [BRW_REGISTER_TYPE_UD] = BRW_HW_REG_TYPE_UD, |
| [BRW_REGISTER_TYPE_D] = BRW_HW_REG_TYPE_D, |
| [BRW_REGISTER_TYPE_UW] = BRW_HW_REG_TYPE_UW, |
| [BRW_REGISTER_TYPE_W] = BRW_HW_REG_TYPE_W, |
| [BRW_REGISTER_TYPE_UB] = BRW_HW_REG_NON_IMM_TYPE_UB, |
| [BRW_REGISTER_TYPE_B] = BRW_HW_REG_NON_IMM_TYPE_B, |
| [BRW_REGISTER_TYPE_F] = BRW_HW_REG_TYPE_F, |
| [BRW_REGISTER_TYPE_UV] = -1, |
| [BRW_REGISTER_TYPE_VF] = -1, |
| [BRW_REGISTER_TYPE_V] = -1, |
| [BRW_REGISTER_TYPE_DF] = GEN7_HW_REG_NON_IMM_TYPE_DF, |
| [BRW_REGISTER_TYPE_HF] = GEN8_HW_REG_NON_IMM_TYPE_HF, |
| [BRW_REGISTER_TYPE_UQ] = GEN8_HW_REG_TYPE_UQ, |
| [BRW_REGISTER_TYPE_Q] = GEN8_HW_REG_TYPE_Q, |
| }; |
| assert(type < ARRAY_SIZE(hw_types)); |
| assert(hw_types[type] != -1); |
| assert(devinfo->gen >= 7 || type < BRW_REGISTER_TYPE_DF); |
| assert(devinfo->gen >= 8 || type < BRW_REGISTER_TYPE_HF); |
| return hw_types[type]; |
| } |
| } |
| |
| void |
| brw_set_dest(struct brw_codegen *p, brw_inst *inst, struct brw_reg dest) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (dest.file == BRW_MESSAGE_REGISTER_FILE) |
| assert((dest.nr & ~BRW_MRF_COMPR4) < BRW_MAX_MRF(devinfo->gen)); |
| else if (dest.file != BRW_ARCHITECTURE_REGISTER_FILE) |
| assert(dest.nr < 128); |
| |
| gen7_convert_mrf_to_grf(p, &dest); |
| |
| brw_inst_set_dst_reg_file(devinfo, inst, dest.file); |
| brw_inst_set_dst_reg_type(devinfo, inst, |
| brw_reg_type_to_hw_type(devinfo, dest.type, |
| dest.file)); |
| brw_inst_set_dst_address_mode(devinfo, inst, dest.address_mode); |
| |
| if (dest.address_mode == BRW_ADDRESS_DIRECT) { |
| brw_inst_set_dst_da_reg_nr(devinfo, inst, dest.nr); |
| |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| brw_inst_set_dst_da1_subreg_nr(devinfo, inst, dest.subnr); |
| if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) |
| dest.hstride = BRW_HORIZONTAL_STRIDE_1; |
| brw_inst_set_dst_hstride(devinfo, inst, dest.hstride); |
| } else { |
| brw_inst_set_dst_da16_subreg_nr(devinfo, inst, dest.subnr / 16); |
| brw_inst_set_da16_writemask(devinfo, inst, dest.writemask); |
| if (dest.file == BRW_GENERAL_REGISTER_FILE || |
| dest.file == BRW_MESSAGE_REGISTER_FILE) { |
| assert(dest.writemask != 0); |
| } |
| /* From the Ivybridge PRM, Vol 4, Part 3, Section 5.2.4.1: |
| * Although Dst.HorzStride is a don't care for Align16, HW needs |
| * this to be programmed as "01". |
| */ |
| brw_inst_set_dst_hstride(devinfo, inst, 1); |
| } |
| } else { |
| brw_inst_set_dst_ia_subreg_nr(devinfo, inst, dest.subnr); |
| |
| /* These are different sizes in align1 vs align16: |
| */ |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| brw_inst_set_dst_ia1_addr_imm(devinfo, inst, |
| dest.indirect_offset); |
| if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) |
| dest.hstride = BRW_HORIZONTAL_STRIDE_1; |
| brw_inst_set_dst_hstride(devinfo, inst, dest.hstride); |
| } else { |
| brw_inst_set_dst_ia16_addr_imm(devinfo, inst, |
| dest.indirect_offset); |
| /* even ignored in da16, still need to set as '01' */ |
| brw_inst_set_dst_hstride(devinfo, inst, 1); |
| } |
| } |
| |
| /* Generators should set a default exec_size of either 8 (SIMD4x2 or SIMD8) |
| * or 16 (SIMD16), as that's normally correct. However, when dealing with |
| * small registers, we automatically reduce it to match the register size. |
| * |
| * In platforms that support fp64 we can emit instructions with a width of |
| * 4 that need two SIMD8 registers and an exec_size of 8 or 16. In these |
| * cases we need to make sure that these instructions have their exec sizes |
| * set properly when they are emitted and we can't rely on this code to fix |
| * it. |
| */ |
| bool fix_exec_size; |
| if (devinfo->gen >= 6) |
| fix_exec_size = dest.width < BRW_EXECUTE_4; |
| else |
| fix_exec_size = dest.width < BRW_EXECUTE_8; |
| |
| if (fix_exec_size) |
| brw_inst_set_exec_size(devinfo, inst, dest.width); |
| } |
| |
| extern int reg_type_size[]; |
| |
| static void |
| validate_reg(const struct gen_device_info *devinfo, |
| brw_inst *inst, struct brw_reg reg) |
| { |
| const int hstride_for_reg[] = {0, 1, 2, 4}; |
| const int vstride_for_reg[] = {0, 1, 2, 4, 8, 16, 32}; |
| const int width_for_reg[] = {1, 2, 4, 8, 16}; |
| const int execsize_for_reg[] = {1, 2, 4, 8, 16, 32}; |
| int width, hstride, vstride, execsize; |
| |
| if (reg.file == BRW_IMMEDIATE_VALUE) { |
| /* 3.3.6: Region Parameters. Restriction: Immediate vectors |
| * mean the destination has to be 128-bit aligned and the |
| * destination horiz stride has to be a word. |
| */ |
| if (reg.type == BRW_REGISTER_TYPE_V) { |
| assert(hstride_for_reg[brw_inst_dst_hstride(devinfo, inst)] * |
| reg_type_size[brw_inst_dst_reg_type(devinfo, inst)] == 2); |
| } |
| |
| return; |
| } |
| |
| if (reg.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| reg.file == BRW_ARF_NULL) |
| return; |
| |
| /* From the IVB PRM Vol. 4, Pt. 3, Section 3.3.3.5: |
| * |
| * "Swizzling is not allowed when an accumulator is used as an implicit |
| * source or an explicit source in an instruction." |
| */ |
| if (reg.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| reg.nr == BRW_ARF_ACCUMULATOR) |
| assert(reg.swizzle == BRW_SWIZZLE_XYZW); |
| |
| assert(reg.hstride >= 0 && reg.hstride < ARRAY_SIZE(hstride_for_reg)); |
| hstride = hstride_for_reg[reg.hstride]; |
| |
| if (reg.vstride == 0xf) { |
| vstride = -1; |
| } else { |
| assert(reg.vstride >= 0 && reg.vstride < ARRAY_SIZE(vstride_for_reg)); |
| vstride = vstride_for_reg[reg.vstride]; |
| } |
| |
| assert(reg.width >= 0 && reg.width < ARRAY_SIZE(width_for_reg)); |
| width = width_for_reg[reg.width]; |
| |
| assert(brw_inst_exec_size(devinfo, inst) >= 0 && |
| brw_inst_exec_size(devinfo, inst) < ARRAY_SIZE(execsize_for_reg)); |
| execsize = execsize_for_reg[brw_inst_exec_size(devinfo, inst)]; |
| |
| /* Restrictions from 3.3.10: Register Region Restrictions. */ |
| /* 3. */ |
| assert(execsize >= width); |
| |
| /* 4. */ |
| if (execsize == width && hstride != 0) { |
| assert(vstride == -1 || vstride == width * hstride); |
| } |
| |
| /* 5. */ |
| if (execsize == width && hstride == 0) { |
| /* no restriction on vstride. */ |
| } |
| |
| /* 6. */ |
| if (width == 1) { |
| assert(hstride == 0); |
| } |
| |
| /* 7. */ |
| if (execsize == 1 && width == 1) { |
| assert(hstride == 0); |
| assert(vstride == 0); |
| } |
| |
| /* 8. */ |
| if (vstride == 0 && hstride == 0) { |
| assert(width == 1); |
| } |
| |
| /* 10. Check destination issues. */ |
| } |
| |
| static bool |
| is_compactable_immediate(unsigned imm) |
| { |
| /* We get the low 12 bits as-is. */ |
| imm &= ~0xfff; |
| |
| /* We get one bit replicated through the top 20 bits. */ |
| return imm == 0 || imm == 0xfffff000; |
| } |
| |
| void |
| brw_set_src0(struct brw_codegen *p, brw_inst *inst, struct brw_reg reg) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (reg.file == BRW_MESSAGE_REGISTER_FILE) |
| assert((reg.nr & ~BRW_MRF_COMPR4) < BRW_MAX_MRF(devinfo->gen)); |
| else if (reg.file != BRW_ARCHITECTURE_REGISTER_FILE) |
| assert(reg.nr < 128); |
| |
| gen7_convert_mrf_to_grf(p, ®); |
| |
| if (devinfo->gen >= 6 && (brw_inst_opcode(devinfo, inst) == BRW_OPCODE_SEND || |
| brw_inst_opcode(devinfo, inst) == BRW_OPCODE_SENDC)) { |
| /* Any source modifiers or regions will be ignored, since this just |
| * identifies the MRF/GRF to start reading the message contents from. |
| * Check for some likely failures. |
| */ |
| assert(!reg.negate); |
| assert(!reg.abs); |
| assert(reg.address_mode == BRW_ADDRESS_DIRECT); |
| } |
| |
| validate_reg(devinfo, inst, reg); |
| |
| brw_inst_set_src0_reg_file(devinfo, inst, reg.file); |
| brw_inst_set_src0_reg_type(devinfo, inst, |
| brw_reg_type_to_hw_type(devinfo, reg.type, reg.file)); |
| brw_inst_set_src0_abs(devinfo, inst, reg.abs); |
| brw_inst_set_src0_negate(devinfo, inst, reg.negate); |
| brw_inst_set_src0_address_mode(devinfo, inst, reg.address_mode); |
| |
| if (reg.file == BRW_IMMEDIATE_VALUE) { |
| if (reg.type == BRW_REGISTER_TYPE_DF || |
| brw_inst_opcode(devinfo, inst) == BRW_OPCODE_DIM) |
| brw_inst_set_imm_df(devinfo, inst, reg.df); |
| else |
| brw_inst_set_imm_ud(devinfo, inst, reg.ud); |
| |
| /* The Bspec's section titled "Non-present Operands" claims that if src0 |
| * is an immediate that src1's type must be the same as that of src0. |
| * |
| * The SNB+ DataTypeIndex instruction compaction tables contain mappings |
| * that do not follow this rule. E.g., from the IVB/HSW table: |
| * |
| * DataTypeIndex 18-Bit Mapping Mapped Meaning |
| * 3 001000001011111101 r:f | i:vf | a:ud | <1> | dir | |
| * |
| * And from the SNB table: |
| * |
| * DataTypeIndex 18-Bit Mapping Mapped Meaning |
| * 8 001000000111101100 a:w | i:w | a:ud | <1> | dir | |
| * |
| * Neither of these cause warnings from the simulator when used, |
| * compacted or otherwise. In fact, all compaction mappings that have an |
| * immediate in src0 use a:ud for src1. |
| * |
| * The GM45 instruction compaction tables do not contain mapped meanings |
| * so it's not clear whether it has the restriction. We'll assume it was |
| * lifted on SNB. (FINISHME: decode the GM45 tables and check.) |
| * |
| * Don't do any of this for 64-bit immediates, since the src1 fields |
| * overlap with the immediate and setting them would overwrite the |
| * immediate we set. |
| */ |
| if (type_sz(reg.type) < 8) { |
| brw_inst_set_src1_reg_file(devinfo, inst, |
| BRW_ARCHITECTURE_REGISTER_FILE); |
| if (devinfo->gen < 6) { |
| brw_inst_set_src1_reg_type(devinfo, inst, |
| brw_inst_src0_reg_type(devinfo, inst)); |
| } else { |
| brw_inst_set_src1_reg_type(devinfo, inst, BRW_HW_REG_TYPE_UD); |
| } |
| } |
| |
| /* Compacted instructions only have 12-bits (plus 1 for the other 20) |
| * for immediate values. Presumably the hardware engineers realized |
| * that the only useful floating-point value that could be represented |
| * in this format is 0.0, which can also be represented as a VF-typed |
| * immediate, so they gave us the previously mentioned mapping on IVB+. |
| * |
| * Strangely, we do have a mapping for imm:f in src1, so we don't need |
| * to do this there. |
| * |
| * If we see a 0.0:F, change the type to VF so that it can be compacted. |
| */ |
| if (brw_inst_imm_ud(devinfo, inst) == 0x0 && |
| brw_inst_src0_reg_type(devinfo, inst) == BRW_HW_REG_TYPE_F) { |
| brw_inst_set_src0_reg_type(devinfo, inst, BRW_HW_REG_IMM_TYPE_VF); |
| } |
| |
| /* There are no mappings for dst:d | i:d, so if the immediate is suitable |
| * set the types to :UD so the instruction can be compacted. |
| */ |
| if (is_compactable_immediate(brw_inst_imm_ud(devinfo, inst)) && |
| brw_inst_cond_modifier(devinfo, inst) == BRW_CONDITIONAL_NONE && |
| brw_inst_src0_reg_type(devinfo, inst) == BRW_HW_REG_TYPE_D && |
| brw_inst_dst_reg_type(devinfo, inst) == BRW_HW_REG_TYPE_D) { |
| brw_inst_set_src0_reg_type(devinfo, inst, BRW_HW_REG_TYPE_UD); |
| brw_inst_set_dst_reg_type(devinfo, inst, BRW_HW_REG_TYPE_UD); |
| } |
| } else { |
| if (reg.address_mode == BRW_ADDRESS_DIRECT) { |
| brw_inst_set_src0_da_reg_nr(devinfo, inst, reg.nr); |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| brw_inst_set_src0_da1_subreg_nr(devinfo, inst, reg.subnr); |
| } else { |
| brw_inst_set_src0_da16_subreg_nr(devinfo, inst, reg.subnr / 16); |
| } |
| } else { |
| brw_inst_set_src0_ia_subreg_nr(devinfo, inst, reg.subnr); |
| |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| brw_inst_set_src0_ia1_addr_imm(devinfo, inst, reg.indirect_offset); |
| } else { |
| brw_inst_set_src0_ia16_addr_imm(devinfo, inst, reg.indirect_offset); |
| } |
| } |
| |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| if (reg.width == BRW_WIDTH_1 && |
| brw_inst_exec_size(devinfo, inst) == BRW_EXECUTE_1) { |
| brw_inst_set_src0_hstride(devinfo, inst, BRW_HORIZONTAL_STRIDE_0); |
| brw_inst_set_src0_width(devinfo, inst, BRW_WIDTH_1); |
| brw_inst_set_src0_vstride(devinfo, inst, BRW_VERTICAL_STRIDE_0); |
| } else { |
| brw_inst_set_src0_hstride(devinfo, inst, reg.hstride); |
| brw_inst_set_src0_width(devinfo, inst, reg.width); |
| brw_inst_set_src0_vstride(devinfo, inst, reg.vstride); |
| } |
| } else { |
| brw_inst_set_src0_da16_swiz_x(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_X)); |
| brw_inst_set_src0_da16_swiz_y(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_Y)); |
| brw_inst_set_src0_da16_swiz_z(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_Z)); |
| brw_inst_set_src0_da16_swiz_w(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_W)); |
| |
| /* This is an oddity of the fact we're using the same |
| * descriptions for registers in align_16 as align_1: |
| */ |
| if (reg.vstride == BRW_VERTICAL_STRIDE_8) |
| brw_inst_set_src0_vstride(devinfo, inst, BRW_VERTICAL_STRIDE_4); |
| else |
| brw_inst_set_src0_vstride(devinfo, inst, reg.vstride); |
| } |
| } |
| } |
| |
| |
| void |
| brw_set_src1(struct brw_codegen *p, brw_inst *inst, struct brw_reg reg) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (reg.file != BRW_ARCHITECTURE_REGISTER_FILE) |
| assert(reg.nr < 128); |
| |
| /* From the IVB PRM Vol. 4, Pt. 3, Section 3.3.3.5: |
| * |
| * "Accumulator registers may be accessed explicitly as src0 |
| * operands only." |
| */ |
| assert(reg.file != BRW_ARCHITECTURE_REGISTER_FILE || |
| reg.nr != BRW_ARF_ACCUMULATOR); |
| |
| gen7_convert_mrf_to_grf(p, ®); |
| assert(reg.file != BRW_MESSAGE_REGISTER_FILE); |
| |
| validate_reg(devinfo, inst, reg); |
| |
| brw_inst_set_src1_reg_file(devinfo, inst, reg.file); |
| brw_inst_set_src1_reg_type(devinfo, inst, |
| brw_reg_type_to_hw_type(devinfo, reg.type, reg.file)); |
| brw_inst_set_src1_abs(devinfo, inst, reg.abs); |
| brw_inst_set_src1_negate(devinfo, inst, reg.negate); |
| |
| /* Only src1 can be immediate in two-argument instructions. |
| */ |
| assert(brw_inst_src0_reg_file(devinfo, inst) != BRW_IMMEDIATE_VALUE); |
| |
| if (reg.file == BRW_IMMEDIATE_VALUE) { |
| /* two-argument instructions can only use 32-bit immediates */ |
| assert(type_sz(reg.type) < 8); |
| brw_inst_set_imm_ud(devinfo, inst, reg.ud); |
| } else { |
| /* This is a hardware restriction, which may or may not be lifted |
| * in the future: |
| */ |
| assert (reg.address_mode == BRW_ADDRESS_DIRECT); |
| /* assert (reg.file == BRW_GENERAL_REGISTER_FILE); */ |
| |
| brw_inst_set_src1_da_reg_nr(devinfo, inst, reg.nr); |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| brw_inst_set_src1_da1_subreg_nr(devinfo, inst, reg.subnr); |
| } else { |
| brw_inst_set_src1_da16_subreg_nr(devinfo, inst, reg.subnr / 16); |
| } |
| |
| if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) { |
| if (reg.width == BRW_WIDTH_1 && |
| brw_inst_exec_size(devinfo, inst) == BRW_EXECUTE_1) { |
| brw_inst_set_src1_hstride(devinfo, inst, BRW_HORIZONTAL_STRIDE_0); |
| brw_inst_set_src1_width(devinfo, inst, BRW_WIDTH_1); |
| brw_inst_set_src1_vstride(devinfo, inst, BRW_VERTICAL_STRIDE_0); |
| } else { |
| brw_inst_set_src1_hstride(devinfo, inst, reg.hstride); |
| brw_inst_set_src1_width(devinfo, inst, reg.width); |
| brw_inst_set_src1_vstride(devinfo, inst, reg.vstride); |
| } |
| } else { |
| brw_inst_set_src1_da16_swiz_x(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_X)); |
| brw_inst_set_src1_da16_swiz_y(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_Y)); |
| brw_inst_set_src1_da16_swiz_z(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_Z)); |
| brw_inst_set_src1_da16_swiz_w(devinfo, inst, |
| BRW_GET_SWZ(reg.swizzle, BRW_CHANNEL_W)); |
| |
| /* This is an oddity of the fact we're using the same |
| * descriptions for registers in align_16 as align_1: |
| */ |
| if (reg.vstride == BRW_VERTICAL_STRIDE_8) |
| brw_inst_set_src1_vstride(devinfo, inst, BRW_VERTICAL_STRIDE_4); |
| else |
| brw_inst_set_src1_vstride(devinfo, inst, reg.vstride); |
| } |
| } |
| } |
| |
| /** |
| * Set the Message Descriptor and Extended Message Descriptor fields |
| * for SEND messages. |
| * |
| * \note This zeroes out the Function Control bits, so it must be called |
| * \b before filling out any message-specific data. Callers can |
| * choose not to fill in irrelevant bits; they will be zero. |
| */ |
| void |
| brw_set_message_descriptor(struct brw_codegen *p, |
| brw_inst *inst, |
| enum brw_message_target sfid, |
| unsigned msg_length, |
| unsigned response_length, |
| bool header_present, |
| bool end_of_thread) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| brw_set_src1(p, inst, brw_imm_d(0)); |
| |
| /* For indirect sends, `inst` will not be the SEND/SENDC instruction |
| * itself; instead, it will be a MOV/OR into the address register. |
| * |
| * In this case, we avoid setting the extended message descriptor bits, |
| * since they go on the later SEND/SENDC instead and if set here would |
| * instead clobber the conditionalmod bits. |
| */ |
| unsigned opcode = brw_inst_opcode(devinfo, inst); |
| if (opcode == BRW_OPCODE_SEND || opcode == BRW_OPCODE_SENDC) { |
| brw_inst_set_sfid(devinfo, inst, sfid); |
| } |
| |
| brw_inst_set_mlen(devinfo, inst, msg_length); |
| brw_inst_set_rlen(devinfo, inst, response_length); |
| brw_inst_set_eot(devinfo, inst, end_of_thread); |
| |
| if (devinfo->gen >= 5) { |
| brw_inst_set_header_present(devinfo, inst, header_present); |
| } |
| } |
| |
| static void brw_set_math_message( struct brw_codegen *p, |
| brw_inst *inst, |
| unsigned function, |
| unsigned integer_type, |
| bool low_precision, |
| unsigned dataType ) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| unsigned msg_length; |
| unsigned response_length; |
| |
| /* Infer message length from the function */ |
| switch (function) { |
| case BRW_MATH_FUNCTION_POW: |
| case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT: |
| case BRW_MATH_FUNCTION_INT_DIV_REMAINDER: |
| case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER: |
| msg_length = 2; |
| break; |
| default: |
| msg_length = 1; |
| break; |
| } |
| |
| /* Infer response length from the function */ |
| switch (function) { |
| case BRW_MATH_FUNCTION_SINCOS: |
| case BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER: |
| response_length = 2; |
| break; |
| default: |
| response_length = 1; |
| break; |
| } |
| |
| |
| brw_set_message_descriptor(p, inst, BRW_SFID_MATH, |
| msg_length, response_length, false, false); |
| brw_inst_set_math_msg_function(devinfo, inst, function); |
| brw_inst_set_math_msg_signed_int(devinfo, inst, integer_type); |
| brw_inst_set_math_msg_precision(devinfo, inst, low_precision); |
| brw_inst_set_math_msg_saturate(devinfo, inst, brw_inst_saturate(devinfo, inst)); |
| brw_inst_set_math_msg_data_type(devinfo, inst, dataType); |
| brw_inst_set_saturate(devinfo, inst, 0); |
| } |
| |
| |
| static void brw_set_ff_sync_message(struct brw_codegen *p, |
| brw_inst *insn, |
| bool allocate, |
| unsigned response_length, |
| bool end_of_thread) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| brw_set_message_descriptor(p, insn, BRW_SFID_URB, |
| 1, response_length, true, end_of_thread); |
| brw_inst_set_urb_opcode(devinfo, insn, 1); /* FF_SYNC */ |
| brw_inst_set_urb_allocate(devinfo, insn, allocate); |
| /* The following fields are not used by FF_SYNC: */ |
| brw_inst_set_urb_global_offset(devinfo, insn, 0); |
| brw_inst_set_urb_swizzle_control(devinfo, insn, 0); |
| brw_inst_set_urb_used(devinfo, insn, 0); |
| brw_inst_set_urb_complete(devinfo, insn, 0); |
| } |
| |
| static void brw_set_urb_message( struct brw_codegen *p, |
| brw_inst *insn, |
| enum brw_urb_write_flags flags, |
| unsigned msg_length, |
| unsigned response_length, |
| unsigned offset, |
| unsigned swizzle_control ) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| assert(devinfo->gen < 7 || swizzle_control != BRW_URB_SWIZZLE_TRANSPOSE); |
| assert(devinfo->gen < 7 || !(flags & BRW_URB_WRITE_ALLOCATE)); |
| assert(devinfo->gen >= 7 || !(flags & BRW_URB_WRITE_PER_SLOT_OFFSET)); |
| |
| brw_set_message_descriptor(p, insn, BRW_SFID_URB, |
| msg_length, response_length, true, |
| flags & BRW_URB_WRITE_EOT); |
| |
| if (flags & BRW_URB_WRITE_OWORD) { |
| assert(msg_length == 2); /* header + one OWORD of data */ |
| brw_inst_set_urb_opcode(devinfo, insn, BRW_URB_OPCODE_WRITE_OWORD); |
| } else { |
| brw_inst_set_urb_opcode(devinfo, insn, BRW_URB_OPCODE_WRITE_HWORD); |
| } |
| |
| brw_inst_set_urb_global_offset(devinfo, insn, offset); |
| brw_inst_set_urb_swizzle_control(devinfo, insn, swizzle_control); |
| |
| if (devinfo->gen < 8) { |
| brw_inst_set_urb_complete(devinfo, insn, !!(flags & BRW_URB_WRITE_COMPLETE)); |
| } |
| |
| if (devinfo->gen < 7) { |
| brw_inst_set_urb_allocate(devinfo, insn, !!(flags & BRW_URB_WRITE_ALLOCATE)); |
| brw_inst_set_urb_used(devinfo, insn, !(flags & BRW_URB_WRITE_UNUSED)); |
| } else { |
| brw_inst_set_urb_per_slot_offset(devinfo, insn, |
| !!(flags & BRW_URB_WRITE_PER_SLOT_OFFSET)); |
| } |
| } |
| |
| void |
| brw_set_dp_write_message(struct brw_codegen *p, |
| brw_inst *insn, |
| unsigned binding_table_index, |
| unsigned msg_control, |
| unsigned msg_type, |
| unsigned target_cache, |
| unsigned msg_length, |
| bool header_present, |
| unsigned last_render_target, |
| unsigned response_length, |
| unsigned end_of_thread, |
| unsigned send_commit_msg) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 6 ? target_cache : |
| BRW_SFID_DATAPORT_WRITE); |
| |
| brw_set_message_descriptor(p, insn, sfid, msg_length, response_length, |
| header_present, end_of_thread); |
| |
| brw_inst_set_binding_table_index(devinfo, insn, binding_table_index); |
| brw_inst_set_dp_write_msg_type(devinfo, insn, msg_type); |
| brw_inst_set_dp_write_msg_control(devinfo, insn, msg_control); |
| brw_inst_set_rt_last(devinfo, insn, last_render_target); |
| if (devinfo->gen < 7) { |
| brw_inst_set_dp_write_commit(devinfo, insn, send_commit_msg); |
| } |
| } |
| |
| void |
| brw_set_dp_read_message(struct brw_codegen *p, |
| brw_inst *insn, |
| unsigned binding_table_index, |
| unsigned msg_control, |
| unsigned msg_type, |
| unsigned target_cache, |
| unsigned msg_length, |
| bool header_present, |
| unsigned response_length) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 6 ? target_cache : |
| BRW_SFID_DATAPORT_READ); |
| |
| brw_set_message_descriptor(p, insn, sfid, msg_length, response_length, |
| header_present, false); |
| |
| brw_inst_set_binding_table_index(devinfo, insn, binding_table_index); |
| brw_inst_set_dp_read_msg_type(devinfo, insn, msg_type); |
| brw_inst_set_dp_read_msg_control(devinfo, insn, msg_control); |
| if (devinfo->gen < 6) |
| brw_inst_set_dp_read_target_cache(devinfo, insn, target_cache); |
| } |
| |
| void |
| brw_set_sampler_message(struct brw_codegen *p, |
| brw_inst *inst, |
| unsigned binding_table_index, |
| unsigned sampler, |
| unsigned msg_type, |
| unsigned response_length, |
| unsigned msg_length, |
| unsigned header_present, |
| unsigned simd_mode, |
| unsigned return_format) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| brw_set_message_descriptor(p, inst, BRW_SFID_SAMPLER, msg_length, |
| response_length, header_present, false); |
| |
| brw_inst_set_binding_table_index(devinfo, inst, binding_table_index); |
| brw_inst_set_sampler(devinfo, inst, sampler); |
| brw_inst_set_sampler_msg_type(devinfo, inst, msg_type); |
| if (devinfo->gen >= 5) { |
| brw_inst_set_sampler_simd_mode(devinfo, inst, simd_mode); |
| } else if (devinfo->gen == 4 && !devinfo->is_g4x) { |
| brw_inst_set_sampler_return_format(devinfo, inst, return_format); |
| } |
| } |
| |
| static void |
| gen7_set_dp_scratch_message(struct brw_codegen *p, |
| brw_inst *inst, |
| bool write, |
| bool dword, |
| bool invalidate_after_read, |
| unsigned num_regs, |
| unsigned addr_offset, |
| unsigned mlen, |
| unsigned rlen, |
| bool header_present) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| assert(num_regs == 1 || num_regs == 2 || num_regs == 4 || |
| (devinfo->gen >= 8 && num_regs == 8)); |
| const unsigned block_size = (devinfo->gen >= 8 ? _mesa_logbase2(num_regs) : |
| num_regs - 1); |
| |
| brw_set_message_descriptor(p, inst, GEN7_SFID_DATAPORT_DATA_CACHE, |
| mlen, rlen, header_present, false); |
| brw_inst_set_dp_category(devinfo, inst, 1); /* Scratch Block Read/Write msgs */ |
| brw_inst_set_scratch_read_write(devinfo, inst, write); |
| brw_inst_set_scratch_type(devinfo, inst, dword); |
| brw_inst_set_scratch_invalidate_after_read(devinfo, inst, invalidate_after_read); |
| brw_inst_set_scratch_block_size(devinfo, inst, block_size); |
| brw_inst_set_scratch_addr_offset(devinfo, inst, addr_offset); |
| } |
| |
| #define next_insn brw_next_insn |
| brw_inst * |
| brw_next_insn(struct brw_codegen *p, unsigned opcode) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| if (p->nr_insn + 1 > p->store_size) { |
| p->store_size <<= 1; |
| p->store = reralloc(p->mem_ctx, p->store, brw_inst, p->store_size); |
| } |
| |
| p->next_insn_offset += 16; |
| insn = &p->store[p->nr_insn++]; |
| memcpy(insn, p->current, sizeof(*insn)); |
| |
| brw_inst_set_opcode(devinfo, insn, opcode); |
| return insn; |
| } |
| |
| static brw_inst * |
| brw_alu1(struct brw_codegen *p, unsigned opcode, |
| struct brw_reg dest, struct brw_reg src) |
| { |
| brw_inst *insn = next_insn(p, opcode); |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src); |
| return insn; |
| } |
| |
| static brw_inst * |
| brw_alu2(struct brw_codegen *p, unsigned opcode, |
| struct brw_reg dest, struct brw_reg src0, struct brw_reg src1) |
| { |
| /* 64-bit immediates are only supported on 1-src instructions */ |
| assert(src0.file != BRW_IMMEDIATE_VALUE || type_sz(src0.type) <= 4); |
| assert(src1.file != BRW_IMMEDIATE_VALUE || type_sz(src1.type) <= 4); |
| |
| brw_inst *insn = next_insn(p, opcode); |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, src1); |
| return insn; |
| } |
| |
| static int |
| get_3src_subreg_nr(struct brw_reg reg) |
| { |
| /* Normally, SubRegNum is in bytes (0..31). However, 3-src instructions |
| * use 32-bit units (components 0..7). Since they only support F/D/UD |
| * types, this doesn't lose any flexibility, but uses fewer bits. |
| */ |
| return reg.subnr / 4; |
| } |
| |
| static brw_inst * |
| brw_alu3(struct brw_codegen *p, unsigned opcode, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1, struct brw_reg src2) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *inst = next_insn(p, opcode); |
| |
| gen7_convert_mrf_to_grf(p, &dest); |
| |
| assert(brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_16); |
| |
| assert(dest.file == BRW_GENERAL_REGISTER_FILE || |
| dest.file == BRW_MESSAGE_REGISTER_FILE); |
| assert(dest.nr < 128); |
| assert(dest.address_mode == BRW_ADDRESS_DIRECT); |
| assert(dest.type == BRW_REGISTER_TYPE_F || |
| dest.type == BRW_REGISTER_TYPE_DF || |
| dest.type == BRW_REGISTER_TYPE_D || |
| dest.type == BRW_REGISTER_TYPE_UD); |
| if (devinfo->gen == 6) { |
| brw_inst_set_3src_dst_reg_file(devinfo, inst, |
| dest.file == BRW_MESSAGE_REGISTER_FILE); |
| } |
| brw_inst_set_3src_dst_reg_nr(devinfo, inst, dest.nr); |
| brw_inst_set_3src_dst_subreg_nr(devinfo, inst, dest.subnr / 16); |
| brw_inst_set_3src_dst_writemask(devinfo, inst, dest.writemask); |
| |
| assert(src0.file == BRW_GENERAL_REGISTER_FILE); |
| assert(src0.address_mode == BRW_ADDRESS_DIRECT); |
| assert(src0.nr < 128); |
| brw_inst_set_3src_src0_swizzle(devinfo, inst, src0.swizzle); |
| brw_inst_set_3src_src0_subreg_nr(devinfo, inst, get_3src_subreg_nr(src0)); |
| brw_inst_set_3src_src0_reg_nr(devinfo, inst, src0.nr); |
| brw_inst_set_3src_src0_abs(devinfo, inst, src0.abs); |
| brw_inst_set_3src_src0_negate(devinfo, inst, src0.negate); |
| brw_inst_set_3src_src0_rep_ctrl(devinfo, inst, |
| src0.vstride == BRW_VERTICAL_STRIDE_0); |
| |
| assert(src1.file == BRW_GENERAL_REGISTER_FILE); |
| assert(src1.address_mode == BRW_ADDRESS_DIRECT); |
| assert(src1.nr < 128); |
| brw_inst_set_3src_src1_swizzle(devinfo, inst, src1.swizzle); |
| brw_inst_set_3src_src1_subreg_nr(devinfo, inst, get_3src_subreg_nr(src1)); |
| brw_inst_set_3src_src1_reg_nr(devinfo, inst, src1.nr); |
| brw_inst_set_3src_src1_abs(devinfo, inst, src1.abs); |
| brw_inst_set_3src_src1_negate(devinfo, inst, src1.negate); |
| brw_inst_set_3src_src1_rep_ctrl(devinfo, inst, |
| src1.vstride == BRW_VERTICAL_STRIDE_0); |
| |
| assert(src2.file == BRW_GENERAL_REGISTER_FILE); |
| assert(src2.address_mode == BRW_ADDRESS_DIRECT); |
| assert(src2.nr < 128); |
| brw_inst_set_3src_src2_swizzle(devinfo, inst, src2.swizzle); |
| brw_inst_set_3src_src2_subreg_nr(devinfo, inst, get_3src_subreg_nr(src2)); |
| brw_inst_set_3src_src2_reg_nr(devinfo, inst, src2.nr); |
| brw_inst_set_3src_src2_abs(devinfo, inst, src2.abs); |
| brw_inst_set_3src_src2_negate(devinfo, inst, src2.negate); |
| brw_inst_set_3src_src2_rep_ctrl(devinfo, inst, |
| src2.vstride == BRW_VERTICAL_STRIDE_0); |
| |
| if (devinfo->gen >= 7) { |
| /* Set both the source and destination types based on dest.type, |
| * ignoring the source register types. The MAD and LRP emitters ensure |
| * that all four types are float. The BFE and BFI2 emitters, however, |
| * may send us mixed D and UD types and want us to ignore that and use |
| * the destination type. |
| */ |
| switch (dest.type) { |
| case BRW_REGISTER_TYPE_F: |
| brw_inst_set_3src_src_type(devinfo, inst, BRW_3SRC_TYPE_F); |
| brw_inst_set_3src_dst_type(devinfo, inst, BRW_3SRC_TYPE_F); |
| break; |
| case BRW_REGISTER_TYPE_DF: |
| brw_inst_set_3src_src_type(devinfo, inst, BRW_3SRC_TYPE_DF); |
| brw_inst_set_3src_dst_type(devinfo, inst, BRW_3SRC_TYPE_DF); |
| break; |
| case BRW_REGISTER_TYPE_D: |
| brw_inst_set_3src_src_type(devinfo, inst, BRW_3SRC_TYPE_D); |
| brw_inst_set_3src_dst_type(devinfo, inst, BRW_3SRC_TYPE_D); |
| break; |
| case BRW_REGISTER_TYPE_UD: |
| brw_inst_set_3src_src_type(devinfo, inst, BRW_3SRC_TYPE_UD); |
| brw_inst_set_3src_dst_type(devinfo, inst, BRW_3SRC_TYPE_UD); |
| break; |
| default: |
| unreachable("not reached"); |
| } |
| } |
| |
| return inst; |
| } |
| |
| |
| /*********************************************************************** |
| * Convenience routines. |
| */ |
| #define ALU1(OP) \ |
| brw_inst *brw_##OP(struct brw_codegen *p, \ |
| struct brw_reg dest, \ |
| struct brw_reg src0) \ |
| { \ |
| return brw_alu1(p, BRW_OPCODE_##OP, dest, src0); \ |
| } |
| |
| #define ALU2(OP) \ |
| brw_inst *brw_##OP(struct brw_codegen *p, \ |
| struct brw_reg dest, \ |
| struct brw_reg src0, \ |
| struct brw_reg src1) \ |
| { \ |
| return brw_alu2(p, BRW_OPCODE_##OP, dest, src0, src1); \ |
| } |
| |
| #define ALU3(OP) \ |
| brw_inst *brw_##OP(struct brw_codegen *p, \ |
| struct brw_reg dest, \ |
| struct brw_reg src0, \ |
| struct brw_reg src1, \ |
| struct brw_reg src2) \ |
| { \ |
| return brw_alu3(p, BRW_OPCODE_##OP, dest, src0, src1, src2); \ |
| } |
| |
| #define ALU3F(OP) \ |
| brw_inst *brw_##OP(struct brw_codegen *p, \ |
| struct brw_reg dest, \ |
| struct brw_reg src0, \ |
| struct brw_reg src1, \ |
| struct brw_reg src2) \ |
| { \ |
| assert(dest.type == BRW_REGISTER_TYPE_F || \ |
| dest.type == BRW_REGISTER_TYPE_DF); \ |
| if (dest.type == BRW_REGISTER_TYPE_F) { \ |
| assert(src0.type == BRW_REGISTER_TYPE_F); \ |
| assert(src1.type == BRW_REGISTER_TYPE_F); \ |
| assert(src2.type == BRW_REGISTER_TYPE_F); \ |
| } else if (dest.type == BRW_REGISTER_TYPE_DF) { \ |
| assert(src0.type == BRW_REGISTER_TYPE_DF); \ |
| assert(src1.type == BRW_REGISTER_TYPE_DF); \ |
| assert(src2.type == BRW_REGISTER_TYPE_DF); \ |
| } \ |
| return brw_alu3(p, BRW_OPCODE_##OP, dest, src0, src1, src2); \ |
| } |
| |
| /* Rounding operations (other than RNDD) require two instructions - the first |
| * stores a rounded value (possibly the wrong way) in the dest register, but |
| * also sets a per-channel "increment bit" in the flag register. A predicated |
| * add of 1.0 fixes dest to contain the desired result. |
| * |
| * Sandybridge and later appear to round correctly without an ADD. |
| */ |
| #define ROUND(OP) \ |
| void brw_##OP(struct brw_codegen *p, \ |
| struct brw_reg dest, \ |
| struct brw_reg src) \ |
| { \ |
| const struct gen_device_info *devinfo = p->devinfo; \ |
| brw_inst *rnd, *add; \ |
| rnd = next_insn(p, BRW_OPCODE_##OP); \ |
| brw_set_dest(p, rnd, dest); \ |
| brw_set_src0(p, rnd, src); \ |
| \ |
| if (devinfo->gen < 6) { \ |
| /* turn on round-increments */ \ |
| brw_inst_set_cond_modifier(devinfo, rnd, BRW_CONDITIONAL_R); \ |
| add = brw_ADD(p, dest, dest, brw_imm_f(1.0f)); \ |
| brw_inst_set_pred_control(devinfo, add, BRW_PREDICATE_NORMAL); \ |
| } \ |
| } |
| |
| |
| ALU1(MOV) |
| ALU2(SEL) |
| ALU1(NOT) |
| ALU2(AND) |
| ALU2(OR) |
| ALU2(XOR) |
| ALU2(SHR) |
| ALU2(SHL) |
| ALU1(DIM) |
| ALU2(ASR) |
| ALU1(FRC) |
| ALU1(RNDD) |
| ALU2(MAC) |
| ALU2(MACH) |
| ALU1(LZD) |
| ALU2(DP4) |
| ALU2(DPH) |
| ALU2(DP3) |
| ALU2(DP2) |
| ALU3F(MAD) |
| ALU3F(LRP) |
| ALU1(BFREV) |
| ALU3(BFE) |
| ALU2(BFI1) |
| ALU3(BFI2) |
| ALU1(FBH) |
| ALU1(FBL) |
| ALU1(CBIT) |
| ALU2(ADDC) |
| ALU2(SUBB) |
| |
| ROUND(RNDZ) |
| ROUND(RNDE) |
| |
| |
| brw_inst * |
| brw_ADD(struct brw_codegen *p, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| /* 6.2.2: add */ |
| if (src0.type == BRW_REGISTER_TYPE_F || |
| (src0.file == BRW_IMMEDIATE_VALUE && |
| src0.type == BRW_REGISTER_TYPE_VF)) { |
| assert(src1.type != BRW_REGISTER_TYPE_UD); |
| assert(src1.type != BRW_REGISTER_TYPE_D); |
| } |
| |
| if (src1.type == BRW_REGISTER_TYPE_F || |
| (src1.file == BRW_IMMEDIATE_VALUE && |
| src1.type == BRW_REGISTER_TYPE_VF)) { |
| assert(src0.type != BRW_REGISTER_TYPE_UD); |
| assert(src0.type != BRW_REGISTER_TYPE_D); |
| } |
| |
| return brw_alu2(p, BRW_OPCODE_ADD, dest, src0, src1); |
| } |
| |
| brw_inst * |
| brw_AVG(struct brw_codegen *p, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| assert(dest.type == src0.type); |
| assert(src0.type == src1.type); |
| switch (src0.type) { |
| case BRW_REGISTER_TYPE_B: |
| case BRW_REGISTER_TYPE_UB: |
| case BRW_REGISTER_TYPE_W: |
| case BRW_REGISTER_TYPE_UW: |
| case BRW_REGISTER_TYPE_D: |
| case BRW_REGISTER_TYPE_UD: |
| break; |
| default: |
| unreachable("Bad type for brw_AVG"); |
| } |
| |
| return brw_alu2(p, BRW_OPCODE_AVG, dest, src0, src1); |
| } |
| |
| brw_inst * |
| brw_MUL(struct brw_codegen *p, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| /* 6.32.38: mul */ |
| if (src0.type == BRW_REGISTER_TYPE_D || |
| src0.type == BRW_REGISTER_TYPE_UD || |
| src1.type == BRW_REGISTER_TYPE_D || |
| src1.type == BRW_REGISTER_TYPE_UD) { |
| assert(dest.type != BRW_REGISTER_TYPE_F); |
| } |
| |
| if (src0.type == BRW_REGISTER_TYPE_F || |
| (src0.file == BRW_IMMEDIATE_VALUE && |
| src0.type == BRW_REGISTER_TYPE_VF)) { |
| assert(src1.type != BRW_REGISTER_TYPE_UD); |
| assert(src1.type != BRW_REGISTER_TYPE_D); |
| } |
| |
| if (src1.type == BRW_REGISTER_TYPE_F || |
| (src1.file == BRW_IMMEDIATE_VALUE && |
| src1.type == BRW_REGISTER_TYPE_VF)) { |
| assert(src0.type != BRW_REGISTER_TYPE_UD); |
| assert(src0.type != BRW_REGISTER_TYPE_D); |
| } |
| |
| assert(src0.file != BRW_ARCHITECTURE_REGISTER_FILE || |
| src0.nr != BRW_ARF_ACCUMULATOR); |
| assert(src1.file != BRW_ARCHITECTURE_REGISTER_FILE || |
| src1.nr != BRW_ARF_ACCUMULATOR); |
| |
| return brw_alu2(p, BRW_OPCODE_MUL, dest, src0, src1); |
| } |
| |
| brw_inst * |
| brw_LINE(struct brw_codegen *p, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| src0.vstride = BRW_VERTICAL_STRIDE_0; |
| src0.width = BRW_WIDTH_1; |
| src0.hstride = BRW_HORIZONTAL_STRIDE_0; |
| return brw_alu2(p, BRW_OPCODE_LINE, dest, src0, src1); |
| } |
| |
| brw_inst * |
| brw_PLN(struct brw_codegen *p, struct brw_reg dest, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| src0.vstride = BRW_VERTICAL_STRIDE_0; |
| src0.width = BRW_WIDTH_1; |
| src0.hstride = BRW_HORIZONTAL_STRIDE_0; |
| src1.vstride = BRW_VERTICAL_STRIDE_8; |
| src1.width = BRW_WIDTH_8; |
| src1.hstride = BRW_HORIZONTAL_STRIDE_1; |
| return brw_alu2(p, BRW_OPCODE_PLN, dest, src0, src1); |
| } |
| |
| brw_inst * |
| brw_F32TO16(struct brw_codegen *p, struct brw_reg dst, struct brw_reg src) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const bool align16 = brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_16; |
| /* The F32TO16 instruction doesn't support 32-bit destination types in |
| * Align1 mode, and neither does the Gen8 implementation in terms of a |
| * converting MOV. Gen7 does zero out the high 16 bits in Align16 mode as |
| * an undocumented feature. |
| */ |
| const bool needs_zero_fill = (dst.type == BRW_REGISTER_TYPE_UD && |
| (!align16 || devinfo->gen >= 8)); |
| brw_inst *inst; |
| |
| if (align16) { |
| assert(dst.type == BRW_REGISTER_TYPE_UD); |
| } else { |
| assert(dst.type == BRW_REGISTER_TYPE_UD || |
| dst.type == BRW_REGISTER_TYPE_W || |
| dst.type == BRW_REGISTER_TYPE_UW || |
| dst.type == BRW_REGISTER_TYPE_HF); |
| } |
| |
| brw_push_insn_state(p); |
| |
| if (needs_zero_fill) { |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| dst = spread(retype(dst, BRW_REGISTER_TYPE_W), 2); |
| } |
| |
| if (devinfo->gen >= 8) { |
| inst = brw_MOV(p, retype(dst, BRW_REGISTER_TYPE_HF), src); |
| } else { |
| assert(devinfo->gen == 7); |
| inst = brw_alu1(p, BRW_OPCODE_F32TO16, dst, src); |
| } |
| |
| if (needs_zero_fill) { |
| brw_inst_set_no_dd_clear(devinfo, inst, true); |
| inst = brw_MOV(p, suboffset(dst, 1), brw_imm_ud(0u)); |
| brw_inst_set_no_dd_check(devinfo, inst, true); |
| } |
| |
| brw_pop_insn_state(p); |
| return inst; |
| } |
| |
| brw_inst * |
| brw_F16TO32(struct brw_codegen *p, struct brw_reg dst, struct brw_reg src) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| bool align16 = brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_16; |
| |
| if (align16) { |
| assert(src.type == BRW_REGISTER_TYPE_UD); |
| } else { |
| /* From the Ivybridge PRM, Vol4, Part3, Section 6.26 f16to32: |
| * |
| * Because this instruction does not have a 16-bit floating-point |
| * type, the source data type must be Word (W). The destination type |
| * must be F (Float). |
| */ |
| if (src.type == BRW_REGISTER_TYPE_UD) |
| src = spread(retype(src, BRW_REGISTER_TYPE_W), 2); |
| |
| assert(src.type == BRW_REGISTER_TYPE_W || |
| src.type == BRW_REGISTER_TYPE_UW || |
| src.type == BRW_REGISTER_TYPE_HF); |
| } |
| |
| if (devinfo->gen >= 8) { |
| return brw_MOV(p, dst, retype(src, BRW_REGISTER_TYPE_HF)); |
| } else { |
| assert(devinfo->gen == 7); |
| return brw_alu1(p, BRW_OPCODE_F16TO32, dst, src); |
| } |
| } |
| |
| |
| void brw_NOP(struct brw_codegen *p) |
| { |
| brw_inst *insn = next_insn(p, BRW_OPCODE_NOP); |
| memset(insn, 0, sizeof(*insn)); |
| brw_inst_set_opcode(p->devinfo, insn, BRW_OPCODE_NOP); |
| } |
| |
| |
| |
| |
| |
| /*********************************************************************** |
| * Comparisons, if/else/endif |
| */ |
| |
| brw_inst * |
| brw_JMPI(struct brw_codegen *p, struct brw_reg index, |
| unsigned predicate_control) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_reg ip = brw_ip_reg(); |
| brw_inst *inst = brw_alu2(p, BRW_OPCODE_JMPI, ip, ip, index); |
| |
| brw_inst_set_exec_size(devinfo, inst, BRW_EXECUTE_2); |
| brw_inst_set_qtr_control(devinfo, inst, BRW_COMPRESSION_NONE); |
| brw_inst_set_mask_control(devinfo, inst, BRW_MASK_DISABLE); |
| brw_inst_set_pred_control(devinfo, inst, predicate_control); |
| |
| return inst; |
| } |
| |
| static void |
| push_if_stack(struct brw_codegen *p, brw_inst *inst) |
| { |
| p->if_stack[p->if_stack_depth] = inst - p->store; |
| |
| p->if_stack_depth++; |
| if (p->if_stack_array_size <= p->if_stack_depth) { |
| p->if_stack_array_size *= 2; |
| p->if_stack = reralloc(p->mem_ctx, p->if_stack, int, |
| p->if_stack_array_size); |
| } |
| } |
| |
| static brw_inst * |
| pop_if_stack(struct brw_codegen *p) |
| { |
| p->if_stack_depth--; |
| return &p->store[p->if_stack[p->if_stack_depth]]; |
| } |
| |
| static void |
| push_loop_stack(struct brw_codegen *p, brw_inst *inst) |
| { |
| if (p->loop_stack_array_size <= (p->loop_stack_depth + 1)) { |
| p->loop_stack_array_size *= 2; |
| p->loop_stack = reralloc(p->mem_ctx, p->loop_stack, int, |
| p->loop_stack_array_size); |
| p->if_depth_in_loop = reralloc(p->mem_ctx, p->if_depth_in_loop, int, |
| p->loop_stack_array_size); |
| } |
| |
| p->loop_stack[p->loop_stack_depth] = inst - p->store; |
| p->loop_stack_depth++; |
| p->if_depth_in_loop[p->loop_stack_depth] = 0; |
| } |
| |
| static brw_inst * |
| get_inner_do_insn(struct brw_codegen *p) |
| { |
| return &p->store[p->loop_stack[p->loop_stack_depth - 1]]; |
| } |
| |
| /* EU takes the value from the flag register and pushes it onto some |
| * sort of a stack (presumably merging with any flag value already on |
| * the stack). Within an if block, the flags at the top of the stack |
| * control execution on each channel of the unit, eg. on each of the |
| * 16 pixel values in our wm programs. |
| * |
| * When the matching 'else' instruction is reached (presumably by |
| * countdown of the instruction count patched in by our ELSE/ENDIF |
| * functions), the relevant flags are inverted. |
| * |
| * When the matching 'endif' instruction is reached, the flags are |
| * popped off. If the stack is now empty, normal execution resumes. |
| */ |
| brw_inst * |
| brw_IF(struct brw_codegen *p, unsigned execute_size) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_IF); |
| |
| /* Override the defaults for this instruction: |
| */ |
| if (devinfo->gen < 6) { |
| brw_set_dest(p, insn, brw_ip_reg()); |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| } else if (devinfo->gen == 6) { |
| brw_set_dest(p, insn, brw_imm_w(0)); |
| brw_inst_set_gen6_jump_count(devinfo, insn, 0); |
| brw_set_src0(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| brw_set_src1(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| } else if (devinfo->gen == 7) { |
| brw_set_dest(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| brw_set_src0(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| brw_set_src1(p, insn, brw_imm_w(0)); |
| brw_inst_set_jip(devinfo, insn, 0); |
| brw_inst_set_uip(devinfo, insn, 0); |
| } else { |
| brw_set_dest(p, insn, vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_D))); |
| brw_set_src0(p, insn, brw_imm_d(0)); |
| brw_inst_set_jip(devinfo, insn, 0); |
| brw_inst_set_uip(devinfo, insn, 0); |
| } |
| |
| brw_inst_set_exec_size(devinfo, insn, execute_size); |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_pred_control(devinfo, insn, BRW_PREDICATE_NORMAL); |
| brw_inst_set_mask_control(devinfo, insn, BRW_MASK_ENABLE); |
| if (!p->single_program_flow && devinfo->gen < 6) |
| brw_inst_set_thread_control(devinfo, insn, BRW_THREAD_SWITCH); |
| |
| push_if_stack(p, insn); |
| p->if_depth_in_loop[p->loop_stack_depth]++; |
| return insn; |
| } |
| |
| /* This function is only used for gen6-style IF instructions with an |
| * embedded comparison (conditional modifier). It is not used on gen7. |
| */ |
| brw_inst * |
| gen6_IF(struct brw_codegen *p, enum brw_conditional_mod conditional, |
| struct brw_reg src0, struct brw_reg src1) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_IF); |
| |
| brw_set_dest(p, insn, brw_imm_w(0)); |
| brw_inst_set_exec_size(devinfo, insn, |
| brw_inst_exec_size(devinfo, p->current)); |
| brw_inst_set_gen6_jump_count(devinfo, insn, 0); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, src1); |
| |
| assert(brw_inst_qtr_control(devinfo, insn) == BRW_COMPRESSION_NONE); |
| assert(brw_inst_pred_control(devinfo, insn) == BRW_PREDICATE_NONE); |
| brw_inst_set_cond_modifier(devinfo, insn, conditional); |
| |
| push_if_stack(p, insn); |
| return insn; |
| } |
| |
| /** |
| * In single-program-flow (SPF) mode, convert IF and ELSE into ADDs. |
| */ |
| static void |
| convert_IF_ELSE_to_ADD(struct brw_codegen *p, |
| brw_inst *if_inst, brw_inst *else_inst) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| /* The next instruction (where the ENDIF would be, if it existed) */ |
| brw_inst *next_inst = &p->store[p->nr_insn]; |
| |
| assert(p->single_program_flow); |
| assert(if_inst != NULL && brw_inst_opcode(devinfo, if_inst) == BRW_OPCODE_IF); |
| assert(else_inst == NULL || brw_inst_opcode(devinfo, else_inst) == BRW_OPCODE_ELSE); |
| assert(brw_inst_exec_size(devinfo, if_inst) == BRW_EXECUTE_1); |
| |
| /* Convert IF to an ADD instruction that moves the instruction pointer |
| * to the first instruction of the ELSE block. If there is no ELSE |
| * block, point to where ENDIF would be. Reverse the predicate. |
| * |
| * There's no need to execute an ENDIF since we don't need to do any |
| * stack operations, and if we're currently executing, we just want to |
| * continue normally. |
| */ |
| brw_inst_set_opcode(devinfo, if_inst, BRW_OPCODE_ADD); |
| brw_inst_set_pred_inv(devinfo, if_inst, true); |
| |
| if (else_inst != NULL) { |
| /* Convert ELSE to an ADD instruction that points where the ENDIF |
| * would be. |
| */ |
| brw_inst_set_opcode(devinfo, else_inst, BRW_OPCODE_ADD); |
| |
| brw_inst_set_imm_ud(devinfo, if_inst, (else_inst - if_inst + 1) * 16); |
| brw_inst_set_imm_ud(devinfo, else_inst, (next_inst - else_inst) * 16); |
| } else { |
| brw_inst_set_imm_ud(devinfo, if_inst, (next_inst - if_inst) * 16); |
| } |
| } |
| |
| /** |
| * Patch IF and ELSE instructions with appropriate jump targets. |
| */ |
| static void |
| patch_IF_ELSE(struct brw_codegen *p, |
| brw_inst *if_inst, brw_inst *else_inst, brw_inst *endif_inst) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| /* We shouldn't be patching IF and ELSE instructions in single program flow |
| * mode when gen < 6, because in single program flow mode on those |
| * platforms, we convert flow control instructions to conditional ADDs that |
| * operate on IP (see brw_ENDIF). |
| * |
| * However, on Gen6, writing to IP doesn't work in single program flow mode |
| * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may |
| * not be updated by non-flow control instructions."). And on later |
| * platforms, there is no significant benefit to converting control flow |
| * instructions to conditional ADDs. So we do patch IF and ELSE |
| * instructions in single program flow mode on those platforms. |
| */ |
| if (devinfo->gen < 6) |
| assert(!p->single_program_flow); |
| |
| assert(if_inst != NULL && brw_inst_opcode(devinfo, if_inst) == BRW_OPCODE_IF); |
| assert(endif_inst != NULL); |
| assert(else_inst == NULL || brw_inst_opcode(devinfo, else_inst) == BRW_OPCODE_ELSE); |
| |
| unsigned br = brw_jump_scale(devinfo); |
| |
| assert(brw_inst_opcode(devinfo, endif_inst) == BRW_OPCODE_ENDIF); |
| brw_inst_set_exec_size(devinfo, endif_inst, brw_inst_exec_size(devinfo, if_inst)); |
| |
| if (else_inst == NULL) { |
| /* Patch IF -> ENDIF */ |
| if (devinfo->gen < 6) { |
| /* Turn it into an IFF, which means no mask stack operations for |
| * all-false and jumping past the ENDIF. |
| */ |
| brw_inst_set_opcode(devinfo, if_inst, BRW_OPCODE_IFF); |
| brw_inst_set_gen4_jump_count(devinfo, if_inst, |
| br * (endif_inst - if_inst + 1)); |
| brw_inst_set_gen4_pop_count(devinfo, if_inst, 0); |
| } else if (devinfo->gen == 6) { |
| /* As of gen6, there is no IFF and IF must point to the ENDIF. */ |
| brw_inst_set_gen6_jump_count(devinfo, if_inst, br*(endif_inst - if_inst)); |
| } else { |
| brw_inst_set_uip(devinfo, if_inst, br * (endif_inst - if_inst)); |
| brw_inst_set_jip(devinfo, if_inst, br * (endif_inst - if_inst)); |
| } |
| } else { |
| brw_inst_set_exec_size(devinfo, else_inst, brw_inst_exec_size(devinfo, if_inst)); |
| |
| /* Patch IF -> ELSE */ |
| if (devinfo->gen < 6) { |
| brw_inst_set_gen4_jump_count(devinfo, if_inst, |
| br * (else_inst - if_inst)); |
| brw_inst_set_gen4_pop_count(devinfo, if_inst, 0); |
| } else if (devinfo->gen == 6) { |
| brw_inst_set_gen6_jump_count(devinfo, if_inst, |
| br * (else_inst - if_inst + 1)); |
| } |
| |
| /* Patch ELSE -> ENDIF */ |
| if (devinfo->gen < 6) { |
| /* BRW_OPCODE_ELSE pre-gen6 should point just past the |
| * matching ENDIF. |
| */ |
| brw_inst_set_gen4_jump_count(devinfo, else_inst, |
| br * (endif_inst - else_inst + 1)); |
| brw_inst_set_gen4_pop_count(devinfo, else_inst, 1); |
| } else if (devinfo->gen == 6) { |
| /* BRW_OPCODE_ELSE on gen6 should point to the matching ENDIF. */ |
| brw_inst_set_gen6_jump_count(devinfo, else_inst, |
| br * (endif_inst - else_inst)); |
| } else { |
| /* The IF instruction's JIP should point just past the ELSE */ |
| brw_inst_set_jip(devinfo, if_inst, br * (else_inst - if_inst + 1)); |
| /* The IF instruction's UIP and ELSE's JIP should point to ENDIF */ |
| brw_inst_set_uip(devinfo, if_inst, br * (endif_inst - if_inst)); |
| brw_inst_set_jip(devinfo, else_inst, br * (endif_inst - else_inst)); |
| if (devinfo->gen >= 8) { |
| /* Since we don't set branch_ctrl, the ELSE's JIP and UIP both |
| * should point to ENDIF. |
| */ |
| brw_inst_set_uip(devinfo, else_inst, br * (endif_inst - else_inst)); |
| } |
| } |
| } |
| } |
| |
| void |
| brw_ELSE(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_ELSE); |
| |
| if (devinfo->gen < 6) { |
| brw_set_dest(p, insn, brw_ip_reg()); |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| } else if (devinfo->gen == 6) { |
| brw_set_dest(p, insn, brw_imm_w(0)); |
| brw_inst_set_gen6_jump_count(devinfo, insn, 0); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| } else if (devinfo->gen == 7) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_w(0)); |
| brw_inst_set_jip(devinfo, insn, 0); |
| brw_inst_set_uip(devinfo, insn, 0); |
| } else { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, brw_imm_d(0)); |
| brw_inst_set_jip(devinfo, insn, 0); |
| brw_inst_set_uip(devinfo, insn, 0); |
| } |
| |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_mask_control(devinfo, insn, BRW_MASK_ENABLE); |
| if (!p->single_program_flow && devinfo->gen < 6) |
| brw_inst_set_thread_control(devinfo, insn, BRW_THREAD_SWITCH); |
| |
| push_if_stack(p, insn); |
| } |
| |
| void |
| brw_ENDIF(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn = NULL; |
| brw_inst *else_inst = NULL; |
| brw_inst *if_inst = NULL; |
| brw_inst *tmp; |
| bool emit_endif = true; |
| |
| /* In single program flow mode, we can express IF and ELSE instructions |
| * equivalently as ADD instructions that operate on IP. On platforms prior |
| * to Gen6, flow control instructions cause an implied thread switch, so |
| * this is a significant savings. |
| * |
| * However, on Gen6, writing to IP doesn't work in single program flow mode |
| * (see the SandyBridge PRM, Volume 4 part 2, p79: "When SPF is ON, IP may |
| * not be updated by non-flow control instructions."). And on later |
| * platforms, there is no significant benefit to converting control flow |
| * instructions to conditional ADDs. So we only do this trick on Gen4 and |
| * Gen5. |
| */ |
| if (devinfo->gen < 6 && p->single_program_flow) |
| emit_endif = false; |
| |
| /* |
| * A single next_insn() may change the base address of instruction store |
| * memory(p->store), so call it first before referencing the instruction |
| * store pointer from an index |
| */ |
| if (emit_endif) |
| insn = next_insn(p, BRW_OPCODE_ENDIF); |
| |
| /* Pop the IF and (optional) ELSE instructions from the stack */ |
| p->if_depth_in_loop[p->loop_stack_depth]--; |
| tmp = pop_if_stack(p); |
| if (brw_inst_opcode(devinfo, tmp) == BRW_OPCODE_ELSE) { |
| else_inst = tmp; |
| tmp = pop_if_stack(p); |
| } |
| if_inst = tmp; |
| |
| if (!emit_endif) { |
| /* ENDIF is useless; don't bother emitting it. */ |
| convert_IF_ELSE_to_ADD(p, if_inst, else_inst); |
| return; |
| } |
| |
| if (devinfo->gen < 6) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| } else if (devinfo->gen == 6) { |
| brw_set_dest(p, insn, brw_imm_w(0)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| } else if (devinfo->gen == 7) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_w(0)); |
| } else { |
| brw_set_src0(p, insn, brw_imm_d(0)); |
| } |
| |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_mask_control(devinfo, insn, BRW_MASK_ENABLE); |
| if (devinfo->gen < 6) |
| brw_inst_set_thread_control(devinfo, insn, BRW_THREAD_SWITCH); |
| |
| /* Also pop item off the stack in the endif instruction: */ |
| if (devinfo->gen < 6) { |
| brw_inst_set_gen4_jump_count(devinfo, insn, 0); |
| brw_inst_set_gen4_pop_count(devinfo, insn, 1); |
| } else if (devinfo->gen == 6) { |
| brw_inst_set_gen6_jump_count(devinfo, insn, 2); |
| } else { |
| brw_inst_set_jip(devinfo, insn, 2); |
| } |
| patch_IF_ELSE(p, if_inst, else_inst, insn); |
| } |
| |
| brw_inst * |
| brw_BREAK(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_BREAK); |
| if (devinfo->gen >= 8) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, brw_imm_d(0x0)); |
| } else if (devinfo->gen >= 6) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| } else { |
| brw_set_dest(p, insn, brw_ip_reg()); |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| brw_inst_set_gen4_pop_count(devinfo, insn, |
| p->if_depth_in_loop[p->loop_stack_depth]); |
| } |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_exec_size(devinfo, insn, |
| brw_inst_exec_size(devinfo, p->current)); |
| |
| return insn; |
| } |
| |
| brw_inst * |
| brw_CONT(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_CONTINUE); |
| brw_set_dest(p, insn, brw_ip_reg()); |
| if (devinfo->gen >= 8) { |
| brw_set_src0(p, insn, brw_imm_d(0x0)); |
| } else { |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); |
| } |
| |
| if (devinfo->gen < 6) { |
| brw_inst_set_gen4_pop_count(devinfo, insn, |
| p->if_depth_in_loop[p->loop_stack_depth]); |
| } |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_exec_size(devinfo, insn, |
| brw_inst_exec_size(devinfo, p->current)); |
| return insn; |
| } |
| |
| brw_inst * |
| gen6_HALT(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| insn = next_insn(p, BRW_OPCODE_HALT); |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| if (devinfo->gen >= 8) { |
| brw_set_src0(p, insn, brw_imm_d(0x0)); |
| } else { |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_d(0x0)); /* UIP and JIP, updated later. */ |
| } |
| |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_exec_size(devinfo, insn, |
| brw_inst_exec_size(devinfo, p->current)); |
| return insn; |
| } |
| |
| /* DO/WHILE loop: |
| * |
| * The DO/WHILE is just an unterminated loop -- break or continue are |
| * used for control within the loop. We have a few ways they can be |
| * done. |
| * |
| * For uniform control flow, the WHILE is just a jump, so ADD ip, ip, |
| * jip and no DO instruction. |
| * |
| * For non-uniform control flow pre-gen6, there's a DO instruction to |
| * push the mask, and a WHILE to jump back, and BREAK to get out and |
| * pop the mask. |
| * |
| * For gen6, there's no more mask stack, so no need for DO. WHILE |
| * just points back to the first instruction of the loop. |
| */ |
| brw_inst * |
| brw_DO(struct brw_codegen *p, unsigned execute_size) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (devinfo->gen >= 6 || p->single_program_flow) { |
| push_loop_stack(p, &p->store[p->nr_insn]); |
| return &p->store[p->nr_insn]; |
| } else { |
| brw_inst *insn = next_insn(p, BRW_OPCODE_DO); |
| |
| push_loop_stack(p, insn); |
| |
| /* Override the defaults for this instruction: |
| */ |
| brw_set_dest(p, insn, brw_null_reg()); |
| brw_set_src0(p, insn, brw_null_reg()); |
| brw_set_src1(p, insn, brw_null_reg()); |
| |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| brw_inst_set_exec_size(devinfo, insn, execute_size); |
| brw_inst_set_pred_control(devinfo, insn, BRW_PREDICATE_NONE); |
| |
| return insn; |
| } |
| } |
| |
| /** |
| * For pre-gen6, we patch BREAK/CONT instructions to point at the WHILE |
| * instruction here. |
| * |
| * For gen6+, see brw_set_uip_jip(), which doesn't care so much about the loop |
| * nesting, since it can always just point to the end of the block/current loop. |
| */ |
| static void |
| brw_patch_break_cont(struct brw_codegen *p, brw_inst *while_inst) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *do_inst = get_inner_do_insn(p); |
| brw_inst *inst; |
| unsigned br = brw_jump_scale(devinfo); |
| |
| assert(devinfo->gen < 6); |
| |
| for (inst = while_inst - 1; inst != do_inst; inst--) { |
| /* If the jump count is != 0, that means that this instruction has already |
| * been patched because it's part of a loop inside of the one we're |
| * patching. |
| */ |
| if (brw_inst_opcode(devinfo, inst) == BRW_OPCODE_BREAK && |
| brw_inst_gen4_jump_count(devinfo, inst) == 0) { |
| brw_inst_set_gen4_jump_count(devinfo, inst, br*((while_inst - inst) + 1)); |
| } else if (brw_inst_opcode(devinfo, inst) == BRW_OPCODE_CONTINUE && |
| brw_inst_gen4_jump_count(devinfo, inst) == 0) { |
| brw_inst_set_gen4_jump_count(devinfo, inst, br * (while_inst - inst)); |
| } |
| } |
| } |
| |
| brw_inst * |
| brw_WHILE(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn, *do_insn; |
| unsigned br = brw_jump_scale(devinfo); |
| |
| if (devinfo->gen >= 6) { |
| insn = next_insn(p, BRW_OPCODE_WHILE); |
| do_insn = get_inner_do_insn(p); |
| |
| if (devinfo->gen >= 8) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, brw_imm_d(0)); |
| brw_inst_set_jip(devinfo, insn, br * (do_insn - insn)); |
| } else if (devinfo->gen == 7) { |
| brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, brw_imm_w(0)); |
| brw_inst_set_jip(devinfo, insn, br * (do_insn - insn)); |
| } else { |
| brw_set_dest(p, insn, brw_imm_w(0)); |
| brw_inst_set_gen6_jump_count(devinfo, insn, br * (do_insn - insn)); |
| brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| brw_set_src1(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); |
| } |
| |
| brw_inst_set_exec_size(devinfo, insn, |
| brw_inst_exec_size(devinfo, p->current)); |
| |
| } else { |
| if (p->single_program_flow) { |
| insn = next_insn(p, BRW_OPCODE_ADD); |
| do_insn = get_inner_do_insn(p); |
| |
| brw_set_dest(p, insn, brw_ip_reg()); |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d((do_insn - insn) * 16)); |
| brw_inst_set_exec_size(devinfo, insn, BRW_EXECUTE_1); |
| } else { |
| insn = next_insn(p, BRW_OPCODE_WHILE); |
| do_insn = get_inner_do_insn(p); |
| |
| assert(brw_inst_opcode(devinfo, do_insn) == BRW_OPCODE_DO); |
| |
| brw_set_dest(p, insn, brw_ip_reg()); |
| brw_set_src0(p, insn, brw_ip_reg()); |
| brw_set_src1(p, insn, brw_imm_d(0)); |
| |
| brw_inst_set_exec_size(devinfo, insn, brw_inst_exec_size(devinfo, do_insn)); |
| brw_inst_set_gen4_jump_count(devinfo, insn, br * (do_insn - insn + 1)); |
| brw_inst_set_gen4_pop_count(devinfo, insn, 0); |
| |
| brw_patch_break_cont(p, insn); |
| } |
| } |
| brw_inst_set_qtr_control(devinfo, insn, BRW_COMPRESSION_NONE); |
| |
| p->loop_stack_depth--; |
| |
| return insn; |
| } |
| |
| /* FORWARD JUMPS: |
| */ |
| void brw_land_fwd_jump(struct brw_codegen *p, int jmp_insn_idx) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *jmp_insn = &p->store[jmp_insn_idx]; |
| unsigned jmpi = 1; |
| |
| if (devinfo->gen >= 5) |
| jmpi = 2; |
| |
| assert(brw_inst_opcode(devinfo, jmp_insn) == BRW_OPCODE_JMPI); |
| assert(brw_inst_src1_reg_file(devinfo, jmp_insn) == BRW_IMMEDIATE_VALUE); |
| |
| brw_inst_set_gen4_jump_count(devinfo, jmp_insn, |
| jmpi * (p->nr_insn - jmp_insn_idx - 1)); |
| } |
| |
| /* To integrate with the above, it makes sense that the comparison |
| * instruction should populate the flag register. It might be simpler |
| * just to use the flag reg for most WM tasks? |
| */ |
| void brw_CMP(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned conditional, |
| struct brw_reg src0, |
| struct brw_reg src1) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn = next_insn(p, BRW_OPCODE_CMP); |
| |
| brw_inst_set_cond_modifier(devinfo, insn, conditional); |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, src1); |
| |
| /* Item WaCMPInstNullDstForcesThreadSwitch in the Haswell Bspec workarounds |
| * page says: |
| * "Any CMP instruction with a null destination must use a {switch}." |
| * |
| * It also applies to other Gen7 platforms (IVB, BYT) even though it isn't |
| * mentioned on their work-arounds pages. |
| */ |
| if (devinfo->gen == 7) { |
| if (dest.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| dest.nr == BRW_ARF_NULL) { |
| brw_inst_set_thread_control(devinfo, insn, BRW_THREAD_SWITCH); |
| } |
| } |
| } |
| |
| /*********************************************************************** |
| * Helpers for the various SEND message types: |
| */ |
| |
| /** Extended math function, float[8]. |
| */ |
| void gen4_math(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned function, |
| unsigned msg_reg_nr, |
| struct brw_reg src, |
| unsigned precision ) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SEND); |
| unsigned data_type; |
| if (has_scalar_region(src)) { |
| data_type = BRW_MATH_DATA_SCALAR; |
| } else { |
| data_type = BRW_MATH_DATA_VECTOR; |
| } |
| |
| assert(devinfo->gen < 6); |
| |
| /* Example code doesn't set predicate_control for send |
| * instructions. |
| */ |
| brw_inst_set_pred_control(devinfo, insn, 0); |
| brw_inst_set_base_mrf(devinfo, insn, msg_reg_nr); |
| |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src); |
| brw_set_math_message(p, |
| insn, |
| function, |
| src.type == BRW_REGISTER_TYPE_D, |
| precision, |
| data_type); |
| } |
| |
| void gen6_math(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned function, |
| struct brw_reg src0, |
| struct brw_reg src1) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn = next_insn(p, BRW_OPCODE_MATH); |
| |
| assert(devinfo->gen >= 6); |
| |
| assert(dest.file == BRW_GENERAL_REGISTER_FILE || |
| (devinfo->gen >= 7 && dest.file == BRW_MESSAGE_REGISTER_FILE)); |
| assert(src0.file == BRW_GENERAL_REGISTER_FILE || |
| (devinfo->gen >= 8 && src0.file == BRW_IMMEDIATE_VALUE)); |
| |
| assert(dest.hstride == BRW_HORIZONTAL_STRIDE_1); |
| if (devinfo->gen == 6) { |
| assert(src0.hstride == BRW_HORIZONTAL_STRIDE_1); |
| assert(src1.hstride == BRW_HORIZONTAL_STRIDE_1); |
| } |
| |
| if (function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT || |
| function == BRW_MATH_FUNCTION_INT_DIV_REMAINDER || |
| function == BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER) { |
| assert(src0.type != BRW_REGISTER_TYPE_F); |
| assert(src1.type != BRW_REGISTER_TYPE_F); |
| assert(src1.file == BRW_GENERAL_REGISTER_FILE || |
| (devinfo->gen >= 8 && src1.file == BRW_IMMEDIATE_VALUE)); |
| } else { |
| assert(src0.type == BRW_REGISTER_TYPE_F); |
| assert(src1.type == BRW_REGISTER_TYPE_F); |
| if (function == BRW_MATH_FUNCTION_POW) { |
| assert(src1.file == BRW_GENERAL_REGISTER_FILE || |
| (devinfo->gen >= 8 && src1.file == BRW_IMMEDIATE_VALUE)); |
| } else { |
| assert(src1.file == BRW_ARCHITECTURE_REGISTER_FILE && |
| src1.nr == BRW_ARF_NULL); |
| } |
| } |
| |
| /* Source modifiers are ignored for extended math instructions on Gen6. */ |
| if (devinfo->gen == 6) { |
| assert(!src0.negate); |
| assert(!src0.abs); |
| assert(!src1.negate); |
| assert(!src1.abs); |
| } |
| |
| brw_inst_set_math_function(devinfo, insn, function); |
| |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, src1); |
| } |
| |
| /** |
| * Return the right surface index to access the thread scratch space using |
| * stateless dataport messages. |
| */ |
| unsigned |
| brw_scratch_surface_idx(const struct brw_codegen *p) |
| { |
| /* The scratch space is thread-local so IA coherency is unnecessary. */ |
| if (p->devinfo->gen >= 8) |
| return GEN8_BTI_STATELESS_NON_COHERENT; |
| else |
| return BRW_BTI_STATELESS; |
| } |
| |
| /** |
| * Write a block of OWORDs (half a GRF each) from the scratch buffer, |
| * using a constant offset per channel. |
| * |
| * The offset must be aligned to oword size (16 bytes). Used for |
| * register spilling. |
| */ |
| void brw_oword_block_write_scratch(struct brw_codegen *p, |
| struct brw_reg mrf, |
| int num_regs, |
| unsigned offset) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned target_cache = |
| (devinfo->gen >= 7 ? GEN7_SFID_DATAPORT_DATA_CACHE : |
| devinfo->gen >= 6 ? GEN6_SFID_DATAPORT_RENDER_CACHE : |
| BRW_DATAPORT_READ_TARGET_RENDER_CACHE); |
| uint32_t msg_type; |
| |
| if (devinfo->gen >= 6) |
| offset /= 16; |
| |
| mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| |
| const unsigned mlen = 1 + num_regs; |
| |
| /* Set up the message header. This is g0, with g0.2 filled with |
| * the offset. We don't want to leave our offset around in g0 or |
| * it'll screw up texture samples, so set it up inside the message |
| * reg. |
| */ |
| { |
| brw_push_insn_state(p); |
| brw_set_default_exec_size(p, BRW_EXECUTE_8); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); |
| |
| brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| |
| /* set message header global offset field (reg 0, element 2) */ |
| brw_MOV(p, |
| retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| mrf.nr, |
| 2), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(offset)); |
| |
| brw_pop_insn_state(p); |
| } |
| |
| { |
| struct brw_reg dest; |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SEND); |
| int send_commit_msg; |
| struct brw_reg src_header = retype(brw_vec8_grf(0, 0), |
| BRW_REGISTER_TYPE_UW); |
| |
| brw_inst_set_compression(devinfo, insn, false); |
| |
| if (brw_inst_exec_size(devinfo, insn) >= 16) |
| src_header = vec16(src_header); |
| |
| assert(brw_inst_pred_control(devinfo, insn) == BRW_PREDICATE_NONE); |
| if (devinfo->gen < 6) |
| brw_inst_set_base_mrf(devinfo, insn, mrf.nr); |
| |
| /* Until gen6, writes followed by reads from the same location |
| * are not guaranteed to be ordered unless write_commit is set. |
| * If set, then a no-op write is issued to the destination |
| * register to set a dependency, and a read from the destination |
| * can be used to ensure the ordering. |
| * |
| * For gen6, only writes between different threads need ordering |
| * protection. Our use of DP writes is all about register |
| * spilling within a thread. |
| */ |
| if (devinfo->gen >= 6) { |
| dest = retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| send_commit_msg = 0; |
| } else { |
| dest = src_header; |
| send_commit_msg = 1; |
| } |
| |
| brw_set_dest(p, insn, dest); |
| if (devinfo->gen >= 6) { |
| brw_set_src0(p, insn, mrf); |
| } else { |
| brw_set_src0(p, insn, brw_null_reg()); |
| } |
| |
| if (devinfo->gen >= 6) |
| msg_type = GEN6_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE; |
| else |
| msg_type = BRW_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE; |
| |
| brw_set_dp_write_message(p, |
| insn, |
| brw_scratch_surface_idx(p), |
| BRW_DATAPORT_OWORD_BLOCK_DWORDS(num_regs * 8), |
| msg_type, |
| target_cache, |
| mlen, |
| true, /* header_present */ |
| 0, /* not a render target */ |
| send_commit_msg, /* response_length */ |
| 0, /* eot */ |
| send_commit_msg); |
| } |
| } |
| |
| |
| /** |
| * Read a block of owords (half a GRF each) from the scratch buffer |
| * using a constant index per channel. |
| * |
| * Offset must be aligned to oword size (16 bytes). Used for register |
| * spilling. |
| */ |
| void |
| brw_oword_block_read_scratch(struct brw_codegen *p, |
| struct brw_reg dest, |
| struct brw_reg mrf, |
| int num_regs, |
| unsigned offset) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (devinfo->gen >= 6) |
| offset /= 16; |
| |
| if (p->devinfo->gen >= 7) { |
| /* On gen 7 and above, we no longer have message registers and we can |
| * send from any register we want. By using the destination register |
| * for the message, we guarantee that the implied message write won't |
| * accidentally overwrite anything. This has been a problem because |
| * the MRF registers and source for the final FB write are both fixed |
| * and may overlap. |
| */ |
| mrf = retype(dest, BRW_REGISTER_TYPE_UD); |
| } else { |
| mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| } |
| dest = retype(dest, BRW_REGISTER_TYPE_UW); |
| |
| const unsigned rlen = num_regs; |
| const unsigned target_cache = |
| (devinfo->gen >= 7 ? GEN7_SFID_DATAPORT_DATA_CACHE : |
| devinfo->gen >= 6 ? GEN6_SFID_DATAPORT_RENDER_CACHE : |
| BRW_DATAPORT_READ_TARGET_RENDER_CACHE); |
| |
| { |
| brw_push_insn_state(p); |
| brw_set_default_exec_size(p, BRW_EXECUTE_8); |
| brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| |
| brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| |
| /* set message header global offset field (reg 0, element 2) */ |
| brw_MOV(p, get_element_ud(mrf, 2), brw_imm_ud(offset)); |
| |
| brw_pop_insn_state(p); |
| } |
| |
| { |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SEND); |
| |
| assert(brw_inst_pred_control(devinfo, insn) == 0); |
| brw_inst_set_compression(devinfo, insn, false); |
| |
| brw_set_dest(p, insn, dest); /* UW? */ |
| if (devinfo->gen >= 6) { |
| brw_set_src0(p, insn, mrf); |
| } else { |
| brw_set_src0(p, insn, brw_null_reg()); |
| brw_inst_set_base_mrf(devinfo, insn, mrf.nr); |
| } |
| |
| brw_set_dp_read_message(p, |
| insn, |
| brw_scratch_surface_idx(p), |
| BRW_DATAPORT_OWORD_BLOCK_DWORDS(num_regs * 8), |
| BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */ |
| target_cache, |
| 1, /* msg_length */ |
| true, /* header_present */ |
| rlen); |
| } |
| } |
| |
| void |
| gen7_block_read_scratch(struct brw_codegen *p, |
| struct brw_reg dest, |
| int num_regs, |
| unsigned offset) |
| { |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SEND); |
| assert(brw_inst_pred_control(p->devinfo, insn) == BRW_PREDICATE_NONE); |
| |
| brw_set_dest(p, insn, retype(dest, BRW_REGISTER_TYPE_UW)); |
| |
| /* The HW requires that the header is present; this is to get the g0.5 |
| * scratch offset. |
| */ |
| brw_set_src0(p, insn, brw_vec8_grf(0, 0)); |
| |
| /* According to the docs, offset is "A 12-bit HWord offset into the memory |
| * Immediate Memory buffer as specified by binding table 0xFF." An HWORD |
| * is 32 bytes, which happens to be the size of a register. |
| */ |
| offset /= REG_SIZE; |
| assert(offset < (1 << 12)); |
| |
| gen7_set_dp_scratch_message(p, insn, |
| false, /* scratch read */ |
| false, /* OWords */ |
| false, /* invalidate after read */ |
| num_regs, |
| offset, |
| 1, /* mlen: just g0 */ |
| num_regs, /* rlen */ |
| true); /* header present */ |
| } |
| |
| /** |
| * Read float[4] vectors from the data port constant cache. |
| * Location (in buffer) should be a multiple of 16. |
| * Used for fetching shader constants. |
| */ |
| void brw_oword_block_read(struct brw_codegen *p, |
| struct brw_reg dest, |
| struct brw_reg mrf, |
| uint32_t offset, |
| uint32_t bind_table_index) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned target_cache = |
| (devinfo->gen >= 6 ? GEN6_SFID_DATAPORT_CONSTANT_CACHE : |
| BRW_DATAPORT_READ_TARGET_DATA_CACHE); |
| const unsigned exec_size = 1 << brw_inst_exec_size(devinfo, p->current); |
| |
| /* On newer hardware, offset is in units of owords. */ |
| if (devinfo->gen >= 6) |
| offset /= 16; |
| |
| mrf = retype(mrf, BRW_REGISTER_TYPE_UD); |
| |
| brw_push_insn_state(p); |
| brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); |
| brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| |
| brw_push_insn_state(p); |
| brw_set_default_exec_size(p, BRW_EXECUTE_8); |
| brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| |
| /* set message header global offset field (reg 0, element 2) */ |
| brw_MOV(p, |
| retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| mrf.nr, |
| 2), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(offset)); |
| brw_pop_insn_state(p); |
| |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SEND); |
| |
| /* cast dest to a uword[8] vector */ |
| dest = retype(vec8(dest), BRW_REGISTER_TYPE_UW); |
| |
| brw_set_dest(p, insn, dest); |
| if (devinfo->gen >= 6) { |
| brw_set_src0(p, insn, mrf); |
| } else { |
| brw_set_src0(p, insn, brw_null_reg()); |
| brw_inst_set_base_mrf(devinfo, insn, mrf.nr); |
| } |
| |
| brw_set_dp_read_message(p, insn, bind_table_index, |
| BRW_DATAPORT_OWORD_BLOCK_DWORDS(exec_size), |
| BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, |
| target_cache, |
| 1, /* msg_length */ |
| true, /* header_present */ |
| DIV_ROUND_UP(exec_size, 8)); /* response_length */ |
| |
| brw_pop_insn_state(p); |
| } |
| |
| |
| void brw_fb_WRITE(struct brw_codegen *p, |
| struct brw_reg payload, |
| struct brw_reg implied_header, |
| unsigned msg_control, |
| unsigned binding_table_index, |
| unsigned msg_length, |
| unsigned response_length, |
| bool eot, |
| bool last_render_target, |
| bool header_present) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned target_cache = |
| (devinfo->gen >= 6 ? GEN6_SFID_DATAPORT_RENDER_CACHE : |
| BRW_DATAPORT_READ_TARGET_RENDER_CACHE); |
| brw_inst *insn; |
| unsigned msg_type; |
| struct brw_reg dest, src0; |
| |
| if (brw_inst_exec_size(devinfo, p->current) >= BRW_EXECUTE_16) |
| dest = retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| else |
| dest = retype(vec8(brw_null_reg()), BRW_REGISTER_TYPE_UW); |
| |
| if (devinfo->gen >= 6) { |
| insn = next_insn(p, BRW_OPCODE_SENDC); |
| } else { |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| } |
| brw_inst_set_compression(devinfo, insn, false); |
| |
| if (devinfo->gen >= 6) { |
| /* headerless version, just submit color payload */ |
| src0 = payload; |
| |
| msg_type = GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE; |
| } else { |
| assert(payload.file == BRW_MESSAGE_REGISTER_FILE); |
| brw_inst_set_base_mrf(devinfo, insn, payload.nr); |
| src0 = implied_header; |
| |
| msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE; |
| } |
| |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_dp_write_message(p, |
| insn, |
| binding_table_index, |
| msg_control, |
| msg_type, |
| target_cache, |
| msg_length, |
| header_present, |
| last_render_target, |
| response_length, |
| eot, |
| 0 /* send_commit_msg */); |
| } |
| |
| brw_inst * |
| gen9_fb_READ(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| unsigned binding_table_index, |
| unsigned msg_length, |
| unsigned response_length, |
| bool per_sample) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| assert(devinfo->gen >= 9); |
| const unsigned msg_subtype = |
| brw_inst_exec_size(devinfo, p->current) == BRW_EXECUTE_16 ? 0 : 1; |
| brw_inst *insn = next_insn(p, BRW_OPCODE_SENDC); |
| |
| brw_set_dest(p, insn, dst); |
| brw_set_src0(p, insn, payload); |
| brw_set_dp_read_message(p, insn, binding_table_index, |
| per_sample << 5 | msg_subtype, |
| GEN9_DATAPORT_RC_RENDER_TARGET_READ, |
| GEN6_SFID_DATAPORT_RENDER_CACHE, |
| msg_length, true /* header_present */, |
| response_length); |
| brw_inst_set_rt_slot_group(devinfo, insn, |
| brw_inst_qtr_control(devinfo, p->current) / 2); |
| |
| return insn; |
| } |
| |
| /** |
| * Texture sample instruction. |
| * Note: the msg_type plus msg_length values determine exactly what kind |
| * of sampling operation is performed. See volume 4, page 161 of docs. |
| */ |
| void brw_SAMPLE(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned msg_reg_nr, |
| struct brw_reg src0, |
| unsigned binding_table_index, |
| unsigned sampler, |
| unsigned msg_type, |
| unsigned response_length, |
| unsigned msg_length, |
| unsigned header_present, |
| unsigned simd_mode, |
| unsigned return_format) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| if (msg_reg_nr != -1) |
| gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| brw_inst_set_pred_control(devinfo, insn, BRW_PREDICATE_NONE); /* XXX */ |
| |
| /* From the 965 PRM (volume 4, part 1, section 14.2.41): |
| * |
| * "Instruction compression is not allowed for this instruction (that |
| * is, send). The hardware behavior is undefined if this instruction is |
| * set as compressed. However, compress control can be set to "SecHalf" |
| * to affect the EMask generation." |
| * |
| * No similar wording is found in later PRMs, but there are examples |
| * utilizing send with SecHalf. More importantly, SIMD8 sampler messages |
| * are allowed in SIMD16 mode and they could not work without SecHalf. For |
| * these reasons, we allow BRW_COMPRESSION_2NDHALF here. |
| */ |
| brw_inst_set_compression(devinfo, insn, false); |
| |
| if (devinfo->gen < 6) |
| brw_inst_set_base_mrf(devinfo, insn, msg_reg_nr); |
| |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_sampler_message(p, insn, |
| binding_table_index, |
| sampler, |
| msg_type, |
| response_length, |
| msg_length, |
| header_present, |
| simd_mode, |
| return_format); |
| } |
| |
| /* Adjust the message header's sampler state pointer to |
| * select the correct group of 16 samplers. |
| */ |
| void brw_adjust_sampler_state_pointer(struct brw_codegen *p, |
| struct brw_reg header, |
| struct brw_reg sampler_index) |
| { |
| /* The "Sampler Index" field can only store values between 0 and 15. |
| * However, we can add an offset to the "Sampler State Pointer" |
| * field, effectively selecting a different set of 16 samplers. |
| * |
| * The "Sampler State Pointer" needs to be aligned to a 32-byte |
| * offset, and each sampler state is only 16-bytes, so we can't |
| * exclusively use the offset - we have to use both. |
| */ |
| |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| if (sampler_index.file == BRW_IMMEDIATE_VALUE) { |
| const int sampler_state_size = 16; /* 16 bytes */ |
| uint32_t sampler = sampler_index.ud; |
| |
| if (sampler >= 16) { |
| assert(devinfo->is_haswell || devinfo->gen >= 8); |
| brw_ADD(p, |
| get_element_ud(header, 3), |
| get_element_ud(brw_vec8_grf(0, 0), 3), |
| brw_imm_ud(16 * (sampler / 16) * sampler_state_size)); |
| } |
| } else { |
| /* Non-const sampler array indexing case */ |
| if (devinfo->gen < 8 && !devinfo->is_haswell) { |
| return; |
| } |
| |
| struct brw_reg temp = get_element_ud(header, 3); |
| |
| brw_AND(p, temp, get_element_ud(sampler_index, 0), brw_imm_ud(0x0f0)); |
| brw_SHL(p, temp, temp, brw_imm_ud(4)); |
| brw_ADD(p, |
| get_element_ud(header, 3), |
| get_element_ud(brw_vec8_grf(0, 0), 3), |
| temp); |
| } |
| } |
| |
| /* All these variables are pretty confusing - we might be better off |
| * using bitmasks and macros for this, in the old style. Or perhaps |
| * just having the caller instantiate the fields in dword3 itself. |
| */ |
| void brw_urb_WRITE(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned msg_reg_nr, |
| struct brw_reg src0, |
| enum brw_urb_write_flags flags, |
| unsigned msg_length, |
| unsigned response_length, |
| unsigned offset, |
| unsigned swizzle) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| |
| if (devinfo->gen >= 7 && !(flags & BRW_URB_WRITE_USE_CHANNEL_MASKS)) { |
| /* Enable Channel Masks in the URB_WRITE_HWORD message header */ |
| brw_push_insn_state(p); |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_OR(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, msg_reg_nr, 5), |
| BRW_REGISTER_TYPE_UD), |
| retype(brw_vec1_grf(0, 5), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(0xff00)); |
| brw_pop_insn_state(p); |
| } |
| |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| |
| assert(msg_length < BRW_MAX_MRF(devinfo->gen)); |
| |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, brw_imm_d(0)); |
| |
| if (devinfo->gen < 6) |
| brw_inst_set_base_mrf(devinfo, insn, msg_reg_nr); |
| |
| brw_set_urb_message(p, |
| insn, |
| flags, |
| msg_length, |
| response_length, |
| offset, |
| swizzle); |
| } |
| |
| struct brw_inst * |
| brw_send_indirect_message(struct brw_codegen *p, |
| unsigned sfid, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg desc) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_inst *send; |
| int setup; |
| |
| dst = retype(dst, BRW_REGISTER_TYPE_UW); |
| |
| assert(desc.type == BRW_REGISTER_TYPE_UD); |
| |
| /* We hold on to the setup instruction (the SEND in the direct case, the OR |
| * in the indirect case) by its index in the instruction store. The |
| * pointer returned by next_insn() may become invalid if emitting the SEND |
| * in the indirect case reallocs the store. |
| */ |
| |
| if (desc.file == BRW_IMMEDIATE_VALUE) { |
| setup = p->nr_insn; |
| send = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_src1(p, send, desc); |
| |
| } else { |
| struct brw_reg addr = retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD); |
| |
| brw_push_insn_state(p); |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); |
| |
| /* Load the indirect descriptor to an address register using OR so the |
| * caller can specify additional descriptor bits with the usual |
| * brw_set_*_message() helper functions. |
| */ |
| setup = p->nr_insn; |
| brw_OR(p, addr, desc, brw_imm_ud(0)); |
| |
| brw_pop_insn_state(p); |
| |
| send = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_src1(p, send, addr); |
| } |
| |
| if (dst.width < BRW_EXECUTE_8) |
| brw_inst_set_exec_size(devinfo, send, dst.width); |
| |
| brw_set_dest(p, send, dst); |
| brw_set_src0(p, send, retype(payload, BRW_REGISTER_TYPE_UD)); |
| brw_inst_set_sfid(devinfo, send, sfid); |
| |
| return &p->store[setup]; |
| } |
| |
| static struct brw_inst * |
| brw_send_indirect_surface_message(struct brw_codegen *p, |
| unsigned sfid, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned message_len, |
| unsigned response_len, |
| bool header_present) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_inst *insn; |
| |
| if (surface.file != BRW_IMMEDIATE_VALUE) { |
| struct brw_reg addr = retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD); |
| |
| brw_push_insn_state(p); |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); |
| |
| /* Mask out invalid bits from the surface index to avoid hangs e.g. when |
| * some surface array is accessed out of bounds. |
| */ |
| insn = brw_AND(p, addr, |
| suboffset(vec1(retype(surface, BRW_REGISTER_TYPE_UD)), |
| BRW_GET_SWZ(surface.swizzle, 0)), |
| brw_imm_ud(0xff)); |
| |
| brw_pop_insn_state(p); |
| |
| surface = addr; |
| } |
| |
| insn = brw_send_indirect_message(p, sfid, dst, payload, surface); |
| brw_inst_set_mlen(devinfo, insn, message_len); |
| brw_inst_set_rlen(devinfo, insn, response_len); |
| brw_inst_set_header_present(devinfo, insn, header_present); |
| |
| return insn; |
| } |
| |
| static bool |
| while_jumps_before_offset(const struct gen_device_info *devinfo, |
| brw_inst *insn, int while_offset, int start_offset) |
| { |
| int scale = 16 / brw_jump_scale(devinfo); |
| int jip = devinfo->gen == 6 ? brw_inst_gen6_jump_count(devinfo, insn) |
| : brw_inst_jip(devinfo, insn); |
| return while_offset + jip * scale <= start_offset; |
| } |
| |
| |
| static int |
| brw_find_next_block_end(struct brw_codegen *p, int start_offset) |
| { |
| int offset; |
| void *store = p->store; |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| int depth = 0; |
| |
| for (offset = next_offset(devinfo, store, start_offset); |
| offset < p->next_insn_offset; |
| offset = next_offset(devinfo, store, offset)) { |
| brw_inst *insn = store + offset; |
| |
| switch (brw_inst_opcode(devinfo, insn)) { |
| case BRW_OPCODE_IF: |
| depth++; |
| break; |
| case BRW_OPCODE_ENDIF: |
| if (depth == 0) |
| return offset; |
| depth--; |
| break; |
| case BRW_OPCODE_WHILE: |
| /* If the while doesn't jump before our instruction, it's the end |
| * of a sibling do...while loop. Ignore it. |
| */ |
| if (!while_jumps_before_offset(devinfo, insn, offset, start_offset)) |
| continue; |
| /* fallthrough */ |
| case BRW_OPCODE_ELSE: |
| case BRW_OPCODE_HALT: |
| if (depth == 0) |
| return offset; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* There is no DO instruction on gen6, so to find the end of the loop |
| * we have to see if the loop is jumping back before our start |
| * instruction. |
| */ |
| static int |
| brw_find_loop_end(struct brw_codegen *p, int start_offset) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| int offset; |
| void *store = p->store; |
| |
| assert(devinfo->gen >= 6); |
| |
| /* Always start after the instruction (such as a WHILE) we're trying to fix |
| * up. |
| */ |
| for (offset = next_offset(devinfo, store, start_offset); |
| offset < p->next_insn_offset; |
| offset = next_offset(devinfo, store, offset)) { |
| brw_inst *insn = store + offset; |
| |
| if (brw_inst_opcode(devinfo, insn) == BRW_OPCODE_WHILE) { |
| if (while_jumps_before_offset(devinfo, insn, offset, start_offset)) |
| return offset; |
| } |
| } |
| assert(!"not reached"); |
| return start_offset; |
| } |
| |
| /* After program generation, go back and update the UIP and JIP of |
| * BREAK, CONT, and HALT instructions to their correct locations. |
| */ |
| void |
| brw_set_uip_jip(struct brw_codegen *p, int start_offset) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| int offset; |
| int br = brw_jump_scale(devinfo); |
| int scale = 16 / br; |
| void *store = p->store; |
| |
| if (devinfo->gen < 6) |
| return; |
| |
| for (offset = start_offset; offset < p->next_insn_offset; offset += 16) { |
| brw_inst *insn = store + offset; |
| assert(brw_inst_cmpt_control(devinfo, insn) == 0); |
| |
| int block_end_offset = brw_find_next_block_end(p, offset); |
| switch (brw_inst_opcode(devinfo, insn)) { |
| case BRW_OPCODE_BREAK: |
| assert(block_end_offset != 0); |
| brw_inst_set_jip(devinfo, insn, (block_end_offset - offset) / scale); |
| /* Gen7 UIP points to WHILE; Gen6 points just after it */ |
| brw_inst_set_uip(devinfo, insn, |
| (brw_find_loop_end(p, offset) - offset + |
| (devinfo->gen == 6 ? 16 : 0)) / scale); |
| break; |
| case BRW_OPCODE_CONTINUE: |
| assert(block_end_offset != 0); |
| brw_inst_set_jip(devinfo, insn, (block_end_offset - offset) / scale); |
| brw_inst_set_uip(devinfo, insn, |
| (brw_find_loop_end(p, offset) - offset) / scale); |
| |
| assert(brw_inst_uip(devinfo, insn) != 0); |
| assert(brw_inst_jip(devinfo, insn) != 0); |
| break; |
| |
| case BRW_OPCODE_ENDIF: { |
| int32_t jump = (block_end_offset == 0) ? |
| 1 * br : (block_end_offset - offset) / scale; |
| if (devinfo->gen >= 7) |
| brw_inst_set_jip(devinfo, insn, jump); |
| else |
| brw_inst_set_gen6_jump_count(devinfo, insn, jump); |
| break; |
| } |
| |
| case BRW_OPCODE_HALT: |
| /* From the Sandy Bridge PRM (volume 4, part 2, section 8.3.19): |
| * |
| * "In case of the halt instruction not inside any conditional |
| * code block, the value of <JIP> and <UIP> should be the |
| * same. In case of the halt instruction inside conditional code |
| * block, the <UIP> should be the end of the program, and the |
| * <JIP> should be end of the most inner conditional code block." |
| * |
| * The uip will have already been set by whoever set up the |
| * instruction. |
| */ |
| if (block_end_offset == 0) { |
| brw_inst_set_jip(devinfo, insn, brw_inst_uip(devinfo, insn)); |
| } else { |
| brw_inst_set_jip(devinfo, insn, (block_end_offset - offset) / scale); |
| } |
| assert(brw_inst_uip(devinfo, insn) != 0); |
| assert(brw_inst_jip(devinfo, insn) != 0); |
| break; |
| } |
| } |
| } |
| |
| void brw_ff_sync(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned msg_reg_nr, |
| struct brw_reg src0, |
| bool allocate, |
| unsigned response_length, |
| bool eot) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| brw_inst *insn; |
| |
| gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, brw_imm_d(0)); |
| |
| if (devinfo->gen < 6) |
| brw_inst_set_base_mrf(devinfo, insn, msg_reg_nr); |
| |
| brw_set_ff_sync_message(p, |
| insn, |
| allocate, |
| response_length, |
| eot); |
| } |
| |
| /** |
| * Emit the SEND instruction necessary to generate stream output data on Gen6 |
| * (for transform feedback). |
| * |
| * If send_commit_msg is true, this is the last piece of stream output data |
| * from this thread, so send the data as a committed write. According to the |
| * Sandy Bridge PRM (volume 2 part 1, section 4.5.1): |
| * |
| * "Prior to End of Thread with a URB_WRITE, the kernel must ensure all |
| * writes are complete by sending the final write as a committed write." |
| */ |
| void |
| brw_svb_write(struct brw_codegen *p, |
| struct brw_reg dest, |
| unsigned msg_reg_nr, |
| struct brw_reg src0, |
| unsigned binding_table_index, |
| bool send_commit_msg) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned target_cache = |
| (devinfo->gen >= 7 ? GEN7_SFID_DATAPORT_DATA_CACHE : |
| devinfo->gen >= 6 ? GEN6_SFID_DATAPORT_RENDER_CACHE : |
| BRW_DATAPORT_READ_TARGET_RENDER_CACHE); |
| brw_inst *insn; |
| |
| gen6_resolve_implied_move(p, &src0, msg_reg_nr); |
| |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_dest(p, insn, dest); |
| brw_set_src0(p, insn, src0); |
| brw_set_src1(p, insn, brw_imm_d(0)); |
| brw_set_dp_write_message(p, insn, |
| binding_table_index, |
| 0, /* msg_control: ignored */ |
| GEN6_DATAPORT_WRITE_MESSAGE_STREAMED_VB_WRITE, |
| target_cache, |
| 1, /* msg_length */ |
| true, /* header_present */ |
| 0, /* last_render_target: ignored */ |
| send_commit_msg, /* response_length */ |
| 0, /* end_of_thread */ |
| send_commit_msg); /* send_commit_msg */ |
| } |
| |
| static unsigned |
| brw_surface_payload_size(struct brw_codegen *p, |
| unsigned num_channels, |
| bool has_simd4x2, |
| bool has_simd16) |
| { |
| if (has_simd4x2 && |
| brw_inst_access_mode(p->devinfo, p->current) == BRW_ALIGN_16) |
| return 1; |
| else if (has_simd16 && |
| brw_inst_exec_size(p->devinfo, p->current) == BRW_EXECUTE_16) |
| return 2 * num_channels; |
| else |
| return num_channels; |
| } |
| |
| static void |
| brw_set_dp_untyped_atomic_message(struct brw_codegen *p, |
| brw_inst *insn, |
| unsigned atomic_op, |
| bool response_expected) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| unsigned msg_control = |
| atomic_op | /* Atomic Operation Type: BRW_AOP_* */ |
| (response_expected ? 1 << 5 : 0); /* Return data expected */ |
| |
| if (devinfo->gen >= 8 || devinfo->is_haswell) { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_exec_size(devinfo, p->current) != BRW_EXECUTE_16) |
| msg_control |= 1 << 4; /* SIMD8 mode */ |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP); |
| } else { |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP_SIMD4X2); |
| } |
| } else { |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| GEN7_DATAPORT_DC_UNTYPED_ATOMIC_OP); |
| |
| if (brw_inst_exec_size(devinfo, p->current) != BRW_EXECUTE_16) |
| msg_control |= 1 << 4; /* SIMD8 mode */ |
| } |
| |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_untyped_atomic(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned atomic_op, |
| unsigned msg_length, |
| bool response_expected) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN7_SFID_DATAPORT_DATA_CACHE); |
| const bool align1 = brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1; |
| /* Mask out unused components -- This is especially important in Align16 |
| * mode on generations that don't have native support for SIMD4x2 atomics, |
| * because unused but enabled components will cause the dataport to perform |
| * additional atomic operations on the addresses that happen to be in the |
| * uninitialized Y, Z and W coordinates of the payload. |
| */ |
| const unsigned mask = align1 ? WRITEMASK_XYZW : WRITEMASK_X; |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, brw_writemask(dst, mask), payload, surface, msg_length, |
| brw_surface_payload_size(p, response_expected, |
| devinfo->gen >= 8 || devinfo->is_haswell, true), |
| align1); |
| |
| brw_set_dp_untyped_atomic_message( |
| p, insn, atomic_op, response_expected); |
| } |
| |
| static void |
| brw_set_dp_untyped_surface_read_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| /* Set mask of 32-bit channels to drop. */ |
| unsigned msg_control = 0xf & (0xf << num_channels); |
| |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_exec_size(devinfo, p->current) == BRW_EXECUTE_16) |
| msg_control |= 1 << 4; /* SIMD16 mode */ |
| else |
| msg_control |= 2 << 4; /* SIMD8 mode */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_DATAPORT_DC_PORT1_UNTYPED_SURFACE_READ : |
| GEN7_DATAPORT_DC_UNTYPED_SURFACE_READ)); |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_untyped_surface_read(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned msg_length, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN7_SFID_DATAPORT_DATA_CACHE); |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, dst, payload, surface, msg_length, |
| brw_surface_payload_size(p, num_channels, true, true), |
| false); |
| |
| brw_set_dp_untyped_surface_read_message( |
| p, insn, num_channels); |
| } |
| |
| static void |
| brw_set_dp_untyped_surface_write_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| /* Set mask of 32-bit channels to drop. */ |
| unsigned msg_control = 0xf & (0xf << num_channels); |
| |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_exec_size(devinfo, p->current) == BRW_EXECUTE_16) |
| msg_control |= 1 << 4; /* SIMD16 mode */ |
| else |
| msg_control |= 2 << 4; /* SIMD8 mode */ |
| } else { |
| if (devinfo->gen >= 8 || devinfo->is_haswell) |
| msg_control |= 0 << 4; /* SIMD4x2 mode */ |
| else |
| msg_control |= 2 << 4; /* SIMD8 mode */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_DATAPORT_DC_PORT1_UNTYPED_SURFACE_WRITE : |
| GEN7_DATAPORT_DC_UNTYPED_SURFACE_WRITE); |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_untyped_surface_write(struct brw_codegen *p, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned msg_length, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN7_SFID_DATAPORT_DATA_CACHE); |
| const bool align1 = brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1; |
| /* Mask out unused components -- See comment in brw_untyped_atomic(). */ |
| const unsigned mask = devinfo->gen == 7 && !devinfo->is_haswell && !align1 ? |
| WRITEMASK_X : WRITEMASK_XYZW; |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, brw_writemask(brw_null_reg(), mask), |
| payload, surface, msg_length, 0, align1); |
| |
| brw_set_dp_untyped_surface_write_message( |
| p, insn, num_channels); |
| } |
| |
| static void |
| brw_set_dp_typed_atomic_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| unsigned atomic_op, |
| bool response_expected) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| unsigned msg_control = |
| atomic_op | /* Atomic Operation Type: BRW_AOP_* */ |
| (response_expected ? 1 << 5 : 0); /* Return data expected */ |
| |
| if (devinfo->gen >= 8 || devinfo->is_haswell) { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 1 << 4; /* Use high 8 slots of the sample mask */ |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_TYPED_ATOMIC_OP); |
| } else { |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_TYPED_ATOMIC_OP_SIMD4X2); |
| } |
| |
| } else { |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| GEN7_DATAPORT_RC_TYPED_ATOMIC_OP); |
| |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 1 << 4; /* Use high 8 slots of the sample mask */ |
| } |
| |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_typed_atomic(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned atomic_op, |
| unsigned msg_length, |
| bool response_expected) { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN6_SFID_DATAPORT_RENDER_CACHE); |
| const bool align1 = (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1); |
| /* Mask out unused components -- See comment in brw_untyped_atomic(). */ |
| const unsigned mask = align1 ? WRITEMASK_XYZW : WRITEMASK_X; |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, brw_writemask(dst, mask), payload, surface, msg_length, |
| brw_surface_payload_size(p, response_expected, |
| devinfo->gen >= 8 || devinfo->is_haswell, false), |
| true); |
| |
| brw_set_dp_typed_atomic_message( |
| p, insn, atomic_op, response_expected); |
| } |
| |
| static void |
| brw_set_dp_typed_surface_read_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| /* Set mask of unused channels. */ |
| unsigned msg_control = 0xf & (0xf << num_channels); |
| |
| if (devinfo->gen >= 8 || devinfo->is_haswell) { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 2 << 4; /* Use high 8 slots of the sample mask */ |
| else |
| msg_control |= 1 << 4; /* Use low 8 slots of the sample mask */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_TYPED_SURFACE_READ); |
| } else { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 1 << 5; /* Use high 8 slots of the sample mask */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| GEN7_DATAPORT_RC_TYPED_SURFACE_READ); |
| } |
| |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_typed_surface_read(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned msg_length, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN6_SFID_DATAPORT_RENDER_CACHE); |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, dst, payload, surface, msg_length, |
| brw_surface_payload_size(p, num_channels, |
| devinfo->gen >= 8 || devinfo->is_haswell, false), |
| true); |
| |
| brw_set_dp_typed_surface_read_message( |
| p, insn, num_channels); |
| } |
| |
| static void |
| brw_set_dp_typed_surface_write_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| /* Set mask of unused channels. */ |
| unsigned msg_control = 0xf & (0xf << num_channels); |
| |
| if (devinfo->gen >= 8 || devinfo->is_haswell) { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 2 << 4; /* Use high 8 slots of the sample mask */ |
| else |
| msg_control |= 1 << 4; /* Use low 8 slots of the sample mask */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| HSW_DATAPORT_DC_PORT1_TYPED_SURFACE_WRITE); |
| |
| } else { |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| if (brw_inst_qtr_control(devinfo, p->current) % 2 == 1) |
| msg_control |= 1 << 5; /* Use high 8 slots of the sample mask */ |
| } |
| |
| brw_inst_set_dp_msg_type(devinfo, insn, |
| GEN7_DATAPORT_RC_TYPED_SURFACE_WRITE); |
| } |
| |
| brw_inst_set_dp_msg_control(devinfo, insn, msg_control); |
| } |
| |
| void |
| brw_typed_surface_write(struct brw_codegen *p, |
| struct brw_reg payload, |
| struct brw_reg surface, |
| unsigned msg_length, |
| unsigned num_channels) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned sfid = (devinfo->gen >= 8 || devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN6_SFID_DATAPORT_RENDER_CACHE); |
| const bool align1 = (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1); |
| /* Mask out unused components -- See comment in brw_untyped_atomic(). */ |
| const unsigned mask = (devinfo->gen == 7 && !devinfo->is_haswell && !align1 ? |
| WRITEMASK_X : WRITEMASK_XYZW); |
| struct brw_inst *insn = brw_send_indirect_surface_message( |
| p, sfid, brw_writemask(brw_null_reg(), mask), |
| payload, surface, msg_length, 0, true); |
| |
| brw_set_dp_typed_surface_write_message( |
| p, insn, num_channels); |
| } |
| |
| static void |
| brw_set_memory_fence_message(struct brw_codegen *p, |
| struct brw_inst *insn, |
| enum brw_message_target sfid, |
| bool commit_enable) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| |
| brw_set_message_descriptor(p, insn, sfid, |
| 1 /* message length */, |
| (commit_enable ? 1 : 0) /* response length */, |
| true /* header present */, |
| false); |
| |
| switch (sfid) { |
| case GEN6_SFID_DATAPORT_RENDER_CACHE: |
| brw_inst_set_dp_msg_type(devinfo, insn, GEN7_DATAPORT_RC_MEMORY_FENCE); |
| break; |
| case GEN7_SFID_DATAPORT_DATA_CACHE: |
| brw_inst_set_dp_msg_type(devinfo, insn, GEN7_DATAPORT_DC_MEMORY_FENCE); |
| break; |
| default: |
| unreachable("Not reached"); |
| } |
| |
| if (commit_enable) |
| brw_inst_set_dp_msg_control(devinfo, insn, 1 << 5); |
| } |
| |
| void |
| brw_memory_fence(struct brw_codegen *p, |
| struct brw_reg dst) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const bool commit_enable = devinfo->gen == 7 && !devinfo->is_haswell; |
| struct brw_inst *insn; |
| |
| brw_push_insn_state(p); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_exec_size(p, BRW_EXECUTE_1); |
| dst = vec1(dst); |
| |
| /* Set dst as destination for dependency tracking, the MEMORY_FENCE |
| * message doesn't write anything back. |
| */ |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| dst = retype(dst, BRW_REGISTER_TYPE_UW); |
| brw_set_dest(p, insn, dst); |
| brw_set_src0(p, insn, dst); |
| brw_set_memory_fence_message(p, insn, GEN7_SFID_DATAPORT_DATA_CACHE, |
| commit_enable); |
| |
| if (devinfo->gen == 7 && !devinfo->is_haswell) { |
| /* IVB does typed surface access through the render cache, so we need to |
| * flush it too. Use a different register so both flushes can be |
| * pipelined by the hardware. |
| */ |
| insn = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_dest(p, insn, offset(dst, 1)); |
| brw_set_src0(p, insn, offset(dst, 1)); |
| brw_set_memory_fence_message(p, insn, GEN6_SFID_DATAPORT_RENDER_CACHE, |
| commit_enable); |
| |
| /* Now write the response of the second message into the response of the |
| * first to trigger a pipeline stall -- This way future render and data |
| * cache messages will be properly ordered with respect to past data and |
| * render cache messages. |
| */ |
| brw_MOV(p, dst, offset(dst, 1)); |
| } |
| |
| brw_pop_insn_state(p); |
| } |
| |
| void |
| brw_pixel_interpolator_query(struct brw_codegen *p, |
| struct brw_reg dest, |
| struct brw_reg mrf, |
| bool noperspective, |
| unsigned mode, |
| struct brw_reg data, |
| unsigned msg_length, |
| unsigned response_length) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_inst *insn; |
| const uint16_t exec_size = brw_inst_exec_size(devinfo, p->current); |
| |
| /* brw_send_indirect_message will automatically use a direct send message |
| * if data is actually immediate. |
| */ |
| insn = brw_send_indirect_message(p, |
| GEN7_SFID_PIXEL_INTERPOLATOR, |
| dest, |
| mrf, |
| vec1(data)); |
| brw_inst_set_mlen(devinfo, insn, msg_length); |
| brw_inst_set_rlen(devinfo, insn, response_length); |
| |
| brw_inst_set_pi_simd_mode(devinfo, insn, exec_size == BRW_EXECUTE_16); |
| brw_inst_set_pi_slot_group(devinfo, insn, 0); /* zero unless 32/64px dispatch */ |
| brw_inst_set_pi_nopersp(devinfo, insn, noperspective); |
| brw_inst_set_pi_message_type(devinfo, insn, mode); |
| } |
| |
| void |
| brw_find_live_channel(struct brw_codegen *p, struct brw_reg dst, |
| struct brw_reg mask) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const unsigned exec_size = 1 << brw_inst_exec_size(devinfo, p->current); |
| const unsigned qtr_control = brw_inst_qtr_control(devinfo, p->current); |
| brw_inst *inst; |
| |
| assert(devinfo->gen >= 7); |
| assert(mask.type == BRW_REGISTER_TYPE_UD); |
| |
| brw_push_insn_state(p); |
| |
| if (brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1) { |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| |
| if (devinfo->gen >= 8) { |
| /* Getting the first active channel index is easy on Gen8: Just find |
| * the first bit set in the execution mask. The register exists on |
| * HSW already but it reads back as all ones when the current |
| * instruction has execution masking disabled, so it's kind of |
| * useless. |
| */ |
| struct brw_reg exec_mask = |
| retype(brw_mask_reg(0), BRW_REGISTER_TYPE_UD); |
| |
| if (mask.file != BRW_IMMEDIATE_VALUE || mask.ud != 0xffffffff) { |
| /* Unfortunately, ce0 does not take into account the thread |
| * dispatch mask, which may be a problem in cases where it's not |
| * tightly packed (i.e. it doesn't have the form '2^n - 1' for |
| * some n). Combine ce0 with the given dispatch (or vector) mask |
| * to mask off those channels which were never dispatched by the |
| * hardware. |
| */ |
| brw_SHR(p, vec1(dst), mask, brw_imm_ud(qtr_control * 8)); |
| brw_AND(p, vec1(dst), exec_mask, vec1(dst)); |
| exec_mask = vec1(dst); |
| } |
| |
| /* Quarter control has the effect of magically shifting the value of |
| * ce0 so you'll get the first active channel relative to the |
| * specified quarter control as result. |
| */ |
| inst = brw_FBL(p, vec1(dst), exec_mask); |
| } else { |
| const struct brw_reg flag = brw_flag_reg(1, 0); |
| |
| brw_MOV(p, retype(flag, BRW_REGISTER_TYPE_UD), brw_imm_ud(0)); |
| |
| /* Run enough instructions returning zero with execution masking and |
| * a conditional modifier enabled in order to get the full execution |
| * mask in f1.0. We could use a single 32-wide move here if it |
| * weren't because of the hardware bug that causes channel enables to |
| * be applied incorrectly to the second half of 32-wide instructions |
| * on Gen7. |
| */ |
| const unsigned lower_size = MIN2(16, exec_size); |
| for (unsigned i = 0; i < exec_size / lower_size; i++) { |
| inst = brw_MOV(p, retype(brw_null_reg(), BRW_REGISTER_TYPE_UW), |
| brw_imm_uw(0)); |
| brw_inst_set_mask_control(devinfo, inst, BRW_MASK_ENABLE); |
| brw_inst_set_group(devinfo, inst, lower_size * i + 8 * qtr_control); |
| brw_inst_set_cond_modifier(devinfo, inst, BRW_CONDITIONAL_Z); |
| brw_inst_set_flag_reg_nr(devinfo, inst, 1); |
| brw_inst_set_exec_size(devinfo, inst, cvt(lower_size) - 1); |
| } |
| |
| /* Find the first bit set in the exec_size-wide portion of the flag |
| * register that was updated by the last sequence of MOV |
| * instructions. |
| */ |
| const enum brw_reg_type type = brw_int_type(exec_size / 8, false); |
| brw_FBL(p, vec1(dst), byte_offset(retype(flag, type), qtr_control)); |
| } |
| } else { |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| |
| if (devinfo->gen >= 8 && |
| mask.file == BRW_IMMEDIATE_VALUE && mask.ud == 0xffffffff) { |
| /* In SIMD4x2 mode the first active channel index is just the |
| * negation of the first bit of the mask register. Note that ce0 |
| * doesn't take into account the dispatch mask, so the Gen7 path |
| * should be used instead unless you have the guarantee that the |
| * dispatch mask is tightly packed (i.e. it has the form '2^n - 1' |
| * for some n). |
| */ |
| inst = brw_AND(p, brw_writemask(dst, WRITEMASK_X), |
| negate(retype(brw_mask_reg(0), BRW_REGISTER_TYPE_UD)), |
| brw_imm_ud(1)); |
| |
| } else { |
| /* Overwrite the destination without and with execution masking to |
| * find out which of the channels is active. |
| */ |
| brw_push_insn_state(p); |
| brw_set_default_exec_size(p, BRW_EXECUTE_4); |
| brw_MOV(p, brw_writemask(vec4(dst), WRITEMASK_X), |
| brw_imm_ud(1)); |
| |
| inst = brw_MOV(p, brw_writemask(vec4(dst), WRITEMASK_X), |
| brw_imm_ud(0)); |
| brw_pop_insn_state(p); |
| brw_inst_set_mask_control(devinfo, inst, BRW_MASK_ENABLE); |
| } |
| } |
| |
| brw_pop_insn_state(p); |
| } |
| |
| void |
| brw_broadcast(struct brw_codegen *p, |
| struct brw_reg dst, |
| struct brw_reg src, |
| struct brw_reg idx) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| const bool align1 = brw_inst_access_mode(devinfo, p->current) == BRW_ALIGN_1; |
| brw_inst *inst; |
| |
| brw_push_insn_state(p); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_exec_size(p, align1 ? BRW_EXECUTE_1 : BRW_EXECUTE_4); |
| |
| assert(src.file == BRW_GENERAL_REGISTER_FILE && |
| src.address_mode == BRW_ADDRESS_DIRECT); |
| |
| if ((src.vstride == 0 && (src.hstride == 0 || !align1)) || |
| idx.file == BRW_IMMEDIATE_VALUE) { |
| /* Trivial, the source is already uniform or the index is a constant. |
| * We will typically not get here if the optimizer is doing its job, but |
| * asserting would be mean. |
| */ |
| const unsigned i = idx.file == BRW_IMMEDIATE_VALUE ? idx.ud : 0; |
| brw_MOV(p, dst, |
| (align1 ? stride(suboffset(src, i), 0, 1, 0) : |
| stride(suboffset(src, 4 * i), 0, 4, 1))); |
| } else { |
| if (align1) { |
| const struct brw_reg addr = |
| retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD); |
| const unsigned offset = src.nr * REG_SIZE + src.subnr; |
| /* Limit in bytes of the signed indirect addressing immediate. */ |
| const unsigned limit = 512; |
| |
| brw_push_insn_state(p); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); |
| |
| /* Take into account the component size and horizontal stride. */ |
| assert(src.vstride == src.hstride + src.width); |
| brw_SHL(p, addr, vec1(idx), |
| brw_imm_ud(_mesa_logbase2(type_sz(src.type)) + |
| src.hstride - 1)); |
| |
| /* We can only address up to limit bytes using the indirect |
| * addressing immediate, account for the difference if the source |
| * register is above this limit. |
| */ |
| if (offset >= limit) |
| brw_ADD(p, addr, addr, brw_imm_ud(offset - offset % limit)); |
| |
| brw_pop_insn_state(p); |
| |
| /* Use indirect addressing to fetch the specified component. */ |
| brw_MOV(p, dst, |
| retype(brw_vec1_indirect(addr.subnr, offset % limit), |
| src.type)); |
| } else { |
| /* In SIMD4x2 mode the index can be either zero or one, replicate it |
| * to all bits of a flag register, |
| */ |
| inst = brw_MOV(p, |
| brw_null_reg(), |
| stride(brw_swizzle(idx, BRW_SWIZZLE_XXXX), 4, 4, 1)); |
| brw_inst_set_pred_control(devinfo, inst, BRW_PREDICATE_NONE); |
| brw_inst_set_cond_modifier(devinfo, inst, BRW_CONDITIONAL_NZ); |
| brw_inst_set_flag_reg_nr(devinfo, inst, 1); |
| |
| /* and use predicated SEL to pick the right channel. */ |
| inst = brw_SEL(p, dst, |
| stride(suboffset(src, 4), 4, 4, 1), |
| stride(src, 4, 4, 1)); |
| brw_inst_set_pred_control(devinfo, inst, BRW_PREDICATE_NORMAL); |
| brw_inst_set_flag_reg_nr(devinfo, inst, 1); |
| } |
| } |
| |
| brw_pop_insn_state(p); |
| } |
| |
| /** |
| * This instruction is generated as a single-channel align1 instruction by |
| * both the VS and FS stages when using INTEL_DEBUG=shader_time. |
| * |
| * We can't use the typed atomic op in the FS because that has the execution |
| * mask ANDed with the pixel mask, but we just want to write the one dword for |
| * all the pixels. |
| * |
| * We don't use the SIMD4x2 atomic ops in the VS because want to just write |
| * one u32. So we use the same untyped atomic write message as the pixel |
| * shader. |
| * |
| * The untyped atomic operation requires a BUFFER surface type with RAW |
| * format, and is only accessible through the legacy DATA_CACHE dataport |
| * messages. |
| */ |
| void brw_shader_time_add(struct brw_codegen *p, |
| struct brw_reg payload, |
| uint32_t surf_index) |
| { |
| const unsigned sfid = (p->devinfo->gen >= 8 || p->devinfo->is_haswell ? |
| HSW_SFID_DATAPORT_DATA_CACHE_1 : |
| GEN7_SFID_DATAPORT_DATA_CACHE); |
| assert(p->devinfo->gen >= 7); |
| |
| brw_push_insn_state(p); |
| brw_set_default_access_mode(p, BRW_ALIGN_1); |
| brw_set_default_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_inst *send = brw_next_insn(p, BRW_OPCODE_SEND); |
| |
| /* We use brw_vec1_reg and unmasked because we want to increment the given |
| * offset only once. |
| */ |
| brw_set_dest(p, send, brw_vec1_reg(BRW_ARCHITECTURE_REGISTER_FILE, |
| BRW_ARF_NULL, 0)); |
| brw_set_src0(p, send, brw_vec1_reg(payload.file, |
| payload.nr, 0)); |
| brw_set_src1(p, send, brw_imm_ud(0)); |
| brw_set_message_descriptor(p, send, sfid, 2, 0, false, false); |
| brw_inst_set_binding_table_index(p->devinfo, send, surf_index); |
| brw_set_dp_untyped_atomic_message(p, send, BRW_AOP_ADD, false); |
| |
| brw_pop_insn_state(p); |
| } |
| |
| |
| /** |
| * Emit the SEND message for a barrier |
| */ |
| void |
| brw_barrier(struct brw_codegen *p, struct brw_reg src) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_inst *inst; |
| |
| assert(devinfo->gen >= 7); |
| |
| inst = next_insn(p, BRW_OPCODE_SEND); |
| brw_set_dest(p, inst, retype(brw_null_reg(), BRW_REGISTER_TYPE_UW)); |
| brw_set_src0(p, inst, src); |
| brw_set_src1(p, inst, brw_null_reg()); |
| |
| brw_set_message_descriptor(p, inst, BRW_SFID_MESSAGE_GATEWAY, |
| 1 /* msg_length */, |
| 0 /* response_length */, |
| false /* header_present */, |
| false /* end_of_thread */); |
| |
| brw_inst_set_gateway_notify(devinfo, inst, 1); |
| brw_inst_set_gateway_subfuncid(devinfo, inst, |
| BRW_MESSAGE_GATEWAY_SFID_BARRIER_MSG); |
| |
| brw_inst_set_mask_control(devinfo, inst, BRW_MASK_DISABLE); |
| } |
| |
| |
| /** |
| * Emit the wait instruction for a barrier |
| */ |
| void |
| brw_WAIT(struct brw_codegen *p) |
| { |
| const struct gen_device_info *devinfo = p->devinfo; |
| struct brw_inst *insn; |
| |
| struct brw_reg src = brw_notification_reg(); |
| |
| insn = next_insn(p, BRW_OPCODE_WAIT); |
| brw_set_dest(p, insn, src); |
| brw_set_src0(p, insn, src); |
| brw_set_src1(p, insn, brw_null_reg()); |
| |
| brw_inst_set_exec_size(devinfo, insn, BRW_EXECUTE_1); |
| brw_inst_set_mask_control(devinfo, insn, BRW_MASK_DISABLE); |
| } |