| /* |
| * Copyright © 2010 Intel Corporation |
| * |
| * 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 AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| |
| /** @file brw_fs_emit.cpp |
| * |
| * This file supports emitting code from the FS LIR to the actual |
| * native instructions. |
| */ |
| |
| extern "C" { |
| #include "main/macros.h" |
| #include "brw_context.h" |
| #include "brw_eu.h" |
| } /* extern "C" */ |
| |
| #include "brw_fs.h" |
| #include "brw_fs_cfg.h" |
| #include "glsl/ir_print_visitor.h" |
| |
| void |
| fs_visitor::generate_fb_write(fs_inst *inst) |
| { |
| bool eot = inst->eot; |
| struct brw_reg implied_header; |
| uint32_t msg_control; |
| |
| /* Header is 2 regs, g0 and g1 are the contents. g0 will be implied |
| * move, here's g1. |
| */ |
| brw_push_insn_state(p); |
| brw_set_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| |
| if (inst->header_present) { |
| if (intel->gen >= 6) { |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| brw_MOV(p, |
| retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD), |
| retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| |
| if (inst->target > 0 && |
| c->key.nr_color_regions > 1 && |
| c->key.sample_alpha_to_coverage) { |
| /* Set "Source0 Alpha Present to RenderTarget" bit in message |
| * header. |
| */ |
| brw_OR(p, |
| vec1(retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD)), |
| vec1(retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)), |
| brw_imm_ud(0x1 << 11)); |
| } |
| |
| if (inst->target > 0) { |
| /* Set the render target index for choosing BLEND_STATE. */ |
| brw_MOV(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| inst->base_mrf, 2), |
| BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(inst->target)); |
| } |
| |
| implied_header = brw_null_reg(); |
| } else { |
| implied_header = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); |
| |
| brw_MOV(p, |
| brw_message_reg(inst->base_mrf + 1), |
| brw_vec8_grf(1, 0)); |
| } |
| } else { |
| implied_header = brw_null_reg(); |
| } |
| |
| if (this->dual_src_output.file != BAD_FILE) |
| msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN01; |
| else if (c->dispatch_width == 16) |
| msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE; |
| else |
| msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01; |
| |
| brw_pop_insn_state(p); |
| |
| brw_fb_WRITE(p, |
| c->dispatch_width, |
| inst->base_mrf, |
| implied_header, |
| msg_control, |
| inst->target, |
| inst->mlen, |
| 0, |
| eot, |
| inst->header_present); |
| } |
| |
| /* Computes the integer pixel x,y values from the origin. |
| * |
| * This is the basis of gl_FragCoord computation, but is also used |
| * pre-gen6 for computing the deltas from v0 for computing |
| * interpolation. |
| */ |
| void |
| fs_visitor::generate_pixel_xy(struct brw_reg dst, bool is_x) |
| { |
| struct brw_reg g1_uw = retype(brw_vec1_grf(1, 0), BRW_REGISTER_TYPE_UW); |
| struct brw_reg src; |
| struct brw_reg deltas; |
| |
| if (is_x) { |
| src = stride(suboffset(g1_uw, 4), 2, 4, 0); |
| deltas = brw_imm_v(0x10101010); |
| } else { |
| src = stride(suboffset(g1_uw, 5), 2, 4, 0); |
| deltas = brw_imm_v(0x11001100); |
| } |
| |
| if (c->dispatch_width == 16) { |
| dst = vec16(dst); |
| } |
| |
| /* We do this 8 or 16-wide, but since the destination is UW we |
| * don't do compression in the 16-wide case. |
| */ |
| brw_push_insn_state(p); |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_ADD(p, dst, src, deltas); |
| brw_pop_insn_state(p); |
| } |
| |
| void |
| fs_visitor::generate_linterp(fs_inst *inst, |
| struct brw_reg dst, struct brw_reg *src) |
| { |
| struct brw_reg delta_x = src[0]; |
| struct brw_reg delta_y = src[1]; |
| struct brw_reg interp = src[2]; |
| |
| if (brw->has_pln && |
| delta_y.nr == delta_x.nr + 1 && |
| (intel->gen >= 6 || (delta_x.nr & 1) == 0)) { |
| brw_PLN(p, dst, interp, delta_x); |
| } else { |
| brw_LINE(p, brw_null_reg(), interp, delta_x); |
| brw_MAC(p, dst, suboffset(interp, 1), delta_y); |
| } |
| } |
| |
| void |
| fs_visitor::generate_math1_gen7(fs_inst *inst, |
| struct brw_reg dst, |
| struct brw_reg src0) |
| { |
| assert(inst->mlen == 0); |
| brw_math(p, dst, |
| brw_math_function(inst->opcode), |
| 0, src0, |
| BRW_MATH_DATA_VECTOR, |
| BRW_MATH_PRECISION_FULL); |
| } |
| |
| void |
| fs_visitor::generate_math2_gen7(fs_inst *inst, |
| struct brw_reg dst, |
| struct brw_reg src0, |
| struct brw_reg src1) |
| { |
| assert(inst->mlen == 0); |
| brw_math2(p, dst, brw_math_function(inst->opcode), src0, src1); |
| } |
| |
| void |
| fs_visitor::generate_math1_gen6(fs_inst *inst, |
| struct brw_reg dst, |
| struct brw_reg src0) |
| { |
| int op = brw_math_function(inst->opcode); |
| |
| assert(inst->mlen == 0); |
| |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_math(p, dst, |
| op, |
| 0, src0, |
| BRW_MATH_DATA_VECTOR, |
| BRW_MATH_PRECISION_FULL); |
| |
| if (c->dispatch_width == 16) { |
| brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF); |
| brw_math(p, sechalf(dst), |
| op, |
| 0, sechalf(src0), |
| BRW_MATH_DATA_VECTOR, |
| BRW_MATH_PRECISION_FULL); |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| } |
| } |
| |
| void |
| fs_visitor::generate_math2_gen6(fs_inst *inst, |
| struct brw_reg dst, |
| struct brw_reg src0, |
| struct brw_reg src1) |
| { |
| int op = brw_math_function(inst->opcode); |
| |
| assert(inst->mlen == 0); |
| |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_math2(p, dst, op, src0, src1); |
| |
| if (c->dispatch_width == 16) { |
| brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF); |
| brw_math2(p, sechalf(dst), op, sechalf(src0), sechalf(src1)); |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| } |
| } |
| |
| void |
| fs_visitor::generate_math_gen4(fs_inst *inst, |
| struct brw_reg dst, |
| struct brw_reg src) |
| { |
| int op = brw_math_function(inst->opcode); |
| |
| assert(inst->mlen >= 1); |
| |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_math(p, dst, |
| op, |
| inst->base_mrf, src, |
| BRW_MATH_DATA_VECTOR, |
| BRW_MATH_PRECISION_FULL); |
| |
| if (c->dispatch_width == 16) { |
| brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF); |
| brw_math(p, sechalf(dst), |
| op, |
| inst->base_mrf + 1, sechalf(src), |
| BRW_MATH_DATA_VECTOR, |
| BRW_MATH_PRECISION_FULL); |
| |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| } |
| } |
| |
| void |
| fs_visitor::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src) |
| { |
| int msg_type = -1; |
| int rlen = 4; |
| uint32_t simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; |
| uint32_t return_format; |
| |
| switch (dst.type) { |
| case BRW_REGISTER_TYPE_D: |
| return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32; |
| break; |
| case BRW_REGISTER_TYPE_UD: |
| return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32; |
| break; |
| default: |
| return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32; |
| break; |
| } |
| |
| if (c->dispatch_width == 16) |
| simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; |
| |
| if (intel->gen >= 5) { |
| switch (inst->opcode) { |
| case SHADER_OPCODE_TEX: |
| if (inst->shadow_compare) { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_COMPARE; |
| } else { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE; |
| } |
| break; |
| case FS_OPCODE_TXB: |
| if (inst->shadow_compare) { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS_COMPARE; |
| } else { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS; |
| } |
| break; |
| case SHADER_OPCODE_TXL: |
| if (inst->shadow_compare) { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE; |
| } else { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD; |
| } |
| break; |
| case SHADER_OPCODE_TXS: |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO; |
| break; |
| case SHADER_OPCODE_TXD: |
| if (inst->shadow_compare) { |
| /* Gen7.5+. Otherwise, lowered by brw_lower_texture_gradients(). */ |
| assert(intel->is_haswell); |
| msg_type = HSW_SAMPLER_MESSAGE_SAMPLE_DERIV_COMPARE; |
| } else { |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS; |
| } |
| break; |
| case SHADER_OPCODE_TXF: |
| msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD; |
| break; |
| default: |
| assert(!"not reached"); |
| break; |
| } |
| } else { |
| switch (inst->opcode) { |
| case SHADER_OPCODE_TEX: |
| /* Note that G45 and older determines shadow compare and dispatch width |
| * from message length for most messages. |
| */ |
| assert(c->dispatch_width == 8); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE; |
| if (inst->shadow_compare) { |
| assert(inst->mlen == 6); |
| } else { |
| assert(inst->mlen <= 4); |
| } |
| break; |
| case FS_OPCODE_TXB: |
| if (inst->shadow_compare) { |
| assert(inst->mlen == 6); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_BIAS_COMPARE; |
| } else { |
| assert(inst->mlen == 9); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS; |
| simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; |
| } |
| break; |
| case SHADER_OPCODE_TXL: |
| if (inst->shadow_compare) { |
| assert(inst->mlen == 6); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_LOD_COMPARE; |
| } else { |
| assert(inst->mlen == 9); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_LOD; |
| simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; |
| } |
| break; |
| case SHADER_OPCODE_TXD: |
| /* There is no sample_d_c message; comparisons are done manually */ |
| assert(inst->mlen == 7 || inst->mlen == 10); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_GRADIENTS; |
| break; |
| case SHADER_OPCODE_TXF: |
| assert(inst->mlen == 9); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD16_LD; |
| simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; |
| break; |
| case SHADER_OPCODE_TXS: |
| assert(inst->mlen == 3); |
| msg_type = BRW_SAMPLER_MESSAGE_SIMD16_RESINFO; |
| simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; |
| break; |
| default: |
| assert(!"not reached"); |
| break; |
| } |
| } |
| assert(msg_type != -1); |
| |
| if (simd_mode == BRW_SAMPLER_SIMD_MODE_SIMD16) { |
| rlen = 8; |
| dst = vec16(dst); |
| } |
| |
| /* Load the message header if present. If there's a texture offset, |
| * we need to set it up explicitly and load the offset bitfield. |
| * Otherwise, we can use an implied move from g0 to the first message reg. |
| */ |
| if (inst->texture_offset) { |
| brw_push_insn_state(p); |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| /* Explicitly set up the message header by copying g0 to the MRF. */ |
| brw_MOV(p, retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD), |
| retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| |
| /* Then set the offset bits in DWord 2. */ |
| brw_MOV(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, |
| inst->base_mrf, 2), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(inst->texture_offset)); |
| brw_pop_insn_state(p); |
| } else if (inst->header_present) { |
| /* Set up an implied move from g0 to the MRF. */ |
| src = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); |
| } |
| |
| brw_SAMPLE(p, |
| retype(dst, BRW_REGISTER_TYPE_UW), |
| inst->base_mrf, |
| src, |
| SURF_INDEX_TEXTURE(inst->sampler), |
| inst->sampler, |
| WRITEMASK_XYZW, |
| msg_type, |
| rlen, |
| inst->mlen, |
| inst->header_present, |
| simd_mode, |
| return_format); |
| } |
| |
| |
| /* For OPCODE_DDX and OPCODE_DDY, per channel of output we've got input |
| * looking like: |
| * |
| * arg0: ss0.tl ss0.tr ss0.bl ss0.br ss1.tl ss1.tr ss1.bl ss1.br |
| * |
| * and we're trying to produce: |
| * |
| * DDX DDY |
| * dst: (ss0.tr - ss0.tl) (ss0.tl - ss0.bl) |
| * (ss0.tr - ss0.tl) (ss0.tr - ss0.br) |
| * (ss0.br - ss0.bl) (ss0.tl - ss0.bl) |
| * (ss0.br - ss0.bl) (ss0.tr - ss0.br) |
| * (ss1.tr - ss1.tl) (ss1.tl - ss1.bl) |
| * (ss1.tr - ss1.tl) (ss1.tr - ss1.br) |
| * (ss1.br - ss1.bl) (ss1.tl - ss1.bl) |
| * (ss1.br - ss1.bl) (ss1.tr - ss1.br) |
| * |
| * and add another set of two more subspans if in 16-pixel dispatch mode. |
| * |
| * For DDX, it ends up being easy: width = 2, horiz=0 gets us the same result |
| * for each pair, and vertstride = 2 jumps us 2 elements after processing a |
| * pair. But for DDY, it's harder, as we want to produce the pairs swizzled |
| * between each other. We could probably do it like ddx and swizzle the right |
| * order later, but bail for now and just produce |
| * ((ss0.tl - ss0.bl)x4 (ss1.tl - ss1.bl)x4) |
| */ |
| void |
| fs_visitor::generate_ddx(fs_inst *inst, struct brw_reg dst, struct brw_reg src) |
| { |
| struct brw_reg src0 = brw_reg(src.file, src.nr, 1, |
| BRW_REGISTER_TYPE_F, |
| BRW_VERTICAL_STRIDE_2, |
| BRW_WIDTH_2, |
| BRW_HORIZONTAL_STRIDE_0, |
| BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); |
| struct brw_reg src1 = brw_reg(src.file, src.nr, 0, |
| BRW_REGISTER_TYPE_F, |
| BRW_VERTICAL_STRIDE_2, |
| BRW_WIDTH_2, |
| BRW_HORIZONTAL_STRIDE_0, |
| BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); |
| brw_ADD(p, dst, src0, negate(src1)); |
| } |
| |
| /* The negate_value boolean is used to negate the derivative computation for |
| * FBOs, since they place the origin at the upper left instead of the lower |
| * left. |
| */ |
| void |
| fs_visitor::generate_ddy(fs_inst *inst, struct brw_reg dst, struct brw_reg src, |
| bool negate_value) |
| { |
| struct brw_reg src0 = brw_reg(src.file, src.nr, 0, |
| BRW_REGISTER_TYPE_F, |
| BRW_VERTICAL_STRIDE_4, |
| BRW_WIDTH_4, |
| BRW_HORIZONTAL_STRIDE_0, |
| BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); |
| struct brw_reg src1 = brw_reg(src.file, src.nr, 2, |
| BRW_REGISTER_TYPE_F, |
| BRW_VERTICAL_STRIDE_4, |
| BRW_WIDTH_4, |
| BRW_HORIZONTAL_STRIDE_0, |
| BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); |
| if (negate_value) |
| brw_ADD(p, dst, src1, negate(src0)); |
| else |
| brw_ADD(p, dst, src0, negate(src1)); |
| } |
| |
| void |
| fs_visitor::generate_discard(fs_inst *inst) |
| { |
| struct brw_reg f0 = brw_flag_reg(); |
| |
| if (intel->gen >= 6) { |
| struct brw_reg g1 = retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW); |
| struct brw_reg some_register; |
| |
| /* As of gen6, we no longer have the mask register to look at, |
| * so life gets a bit more complicated. |
| */ |
| |
| /* Load the flag register with all ones. */ |
| brw_push_insn_state(p); |
| brw_set_mask_control(p, BRW_MASK_DISABLE); |
| brw_MOV(p, f0, brw_imm_uw(0xffff)); |
| brw_pop_insn_state(p); |
| |
| /* Do a comparison that should always fail, to produce 0s in the flag |
| * reg where we have active channels. |
| */ |
| some_register = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); |
| brw_CMP(p, retype(brw_null_reg(), BRW_REGISTER_TYPE_UD), |
| BRW_CONDITIONAL_NZ, some_register, some_register); |
| |
| /* Undo CMP's whacking of predication*/ |
| brw_set_predicate_control(p, BRW_PREDICATE_NONE); |
| |
| brw_push_insn_state(p); |
| brw_set_mask_control(p, BRW_MASK_DISABLE); |
| brw_AND(p, g1, f0, g1); |
| brw_pop_insn_state(p); |
| } else { |
| struct brw_reg g0 = retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UW); |
| |
| brw_push_insn_state(p); |
| brw_set_mask_control(p, BRW_MASK_DISABLE); |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| |
| /* Unlike the 965, we have the mask reg, so we just need |
| * somewhere to invert that (containing channels to be disabled) |
| * so it can be ANDed with the mask of pixels still to be |
| * written. Use the flag reg for consistency with gen6+. |
| */ |
| brw_NOT(p, f0, brw_mask_reg(1)); /* IMASK */ |
| brw_AND(p, g0, f0, g0); |
| |
| brw_pop_insn_state(p); |
| } |
| } |
| |
| void |
| fs_visitor::generate_spill(fs_inst *inst, struct brw_reg src) |
| { |
| assert(inst->mlen != 0); |
| |
| brw_MOV(p, |
| retype(brw_message_reg(inst->base_mrf + 1), BRW_REGISTER_TYPE_UD), |
| retype(src, BRW_REGISTER_TYPE_UD)); |
| brw_oword_block_write_scratch(p, brw_message_reg(inst->base_mrf), 1, |
| inst->offset); |
| } |
| |
| void |
| fs_visitor::generate_unspill(fs_inst *inst, struct brw_reg dst) |
| { |
| assert(inst->mlen != 0); |
| |
| /* Clear any post destination dependencies that would be ignored by |
| * the block read. See the B-Spec for pre-gen5 send instruction. |
| * |
| * This could use a better solution, since texture sampling and |
| * math reads could potentially run into it as well -- anywhere |
| * that we have a SEND with a destination that is a register that |
| * was written but not read within the last N instructions (what's |
| * N? unsure). This is rare because of dead code elimination, but |
| * not impossible. |
| */ |
| if (intel->gen == 4 && !intel->is_g4x) |
| brw_MOV(p, brw_null_reg(), dst); |
| |
| brw_oword_block_read_scratch(p, dst, brw_message_reg(inst->base_mrf), 1, |
| inst->offset); |
| |
| if (intel->gen == 4 && !intel->is_g4x) { |
| /* gen4 errata: destination from a send can't be used as a |
| * destination until it's been read. Just read it so we don't |
| * have to worry. |
| */ |
| brw_MOV(p, brw_null_reg(), dst); |
| } |
| } |
| |
| void |
| fs_visitor::generate_pull_constant_load(fs_inst *inst, struct brw_reg dst, |
| struct brw_reg index, |
| struct brw_reg offset) |
| { |
| assert(inst->mlen != 0); |
| |
| /* Clear any post destination dependencies that would be ignored by |
| * the block read. See the B-Spec for pre-gen5 send instruction. |
| * |
| * This could use a better solution, since texture sampling and |
| * math reads could potentially run into it as well -- anywhere |
| * that we have a SEND with a destination that is a register that |
| * was written but not read within the last N instructions (what's |
| * N? unsure). This is rare because of dead code elimination, but |
| * not impossible. |
| */ |
| if (intel->gen == 4 && !intel->is_g4x) |
| brw_MOV(p, brw_null_reg(), dst); |
| |
| assert(index.file == BRW_IMMEDIATE_VALUE && |
| index.type == BRW_REGISTER_TYPE_UD); |
| uint32_t surf_index = index.dw1.ud; |
| |
| assert(offset.file == BRW_IMMEDIATE_VALUE && |
| offset.type == BRW_REGISTER_TYPE_UD); |
| uint32_t read_offset = offset.dw1.ud; |
| |
| brw_oword_block_read(p, dst, brw_message_reg(inst->base_mrf), |
| read_offset, surf_index); |
| |
| if (intel->gen == 4 && !intel->is_g4x) { |
| /* gen4 errata: destination from a send can't be used as a |
| * destination until it's been read. Just read it so we don't |
| * have to worry. |
| */ |
| brw_MOV(p, brw_null_reg(), dst); |
| } |
| } |
| |
| |
| /** |
| * Cause the current pixel/sample mask (from R1.7 bits 15:0) to be transferred |
| * into the flags register (f0.0). |
| * |
| * Used only on Gen6 and above. |
| */ |
| void |
| fs_visitor::generate_mov_dispatch_to_flags() |
| { |
| struct brw_reg f0 = brw_flag_reg(); |
| struct brw_reg g1 = retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW); |
| |
| assert (intel->gen >= 6); |
| brw_push_insn_state(p); |
| brw_set_mask_control(p, BRW_MASK_DISABLE); |
| brw_MOV(p, f0, g1); |
| brw_pop_insn_state(p); |
| } |
| |
| |
| static uint32_t brw_file_from_reg(fs_reg *reg) |
| { |
| switch (reg->file) { |
| case ARF: |
| return BRW_ARCHITECTURE_REGISTER_FILE; |
| case GRF: |
| return BRW_GENERAL_REGISTER_FILE; |
| case MRF: |
| return BRW_MESSAGE_REGISTER_FILE; |
| case IMM: |
| return BRW_IMMEDIATE_VALUE; |
| default: |
| assert(!"not reached"); |
| return BRW_GENERAL_REGISTER_FILE; |
| } |
| } |
| |
| static struct brw_reg |
| brw_reg_from_fs_reg(fs_reg *reg) |
| { |
| struct brw_reg brw_reg; |
| |
| switch (reg->file) { |
| case GRF: |
| case ARF: |
| case MRF: |
| if (reg->smear == -1) { |
| brw_reg = brw_vec8_reg(brw_file_from_reg(reg), reg->reg, 0); |
| } else { |
| brw_reg = brw_vec1_reg(brw_file_from_reg(reg), reg->reg, reg->smear); |
| } |
| brw_reg = retype(brw_reg, reg->type); |
| if (reg->sechalf) |
| brw_reg = sechalf(brw_reg); |
| break; |
| case IMM: |
| switch (reg->type) { |
| case BRW_REGISTER_TYPE_F: |
| brw_reg = brw_imm_f(reg->imm.f); |
| break; |
| case BRW_REGISTER_TYPE_D: |
| brw_reg = brw_imm_d(reg->imm.i); |
| break; |
| case BRW_REGISTER_TYPE_UD: |
| brw_reg = brw_imm_ud(reg->imm.u); |
| break; |
| default: |
| assert(!"not reached"); |
| brw_reg = brw_null_reg(); |
| break; |
| } |
| break; |
| case FIXED_HW_REG: |
| brw_reg = reg->fixed_hw_reg; |
| break; |
| case BAD_FILE: |
| /* Probably unused. */ |
| brw_reg = brw_null_reg(); |
| break; |
| case UNIFORM: |
| assert(!"not reached"); |
| brw_reg = brw_null_reg(); |
| break; |
| default: |
| assert(!"not reached"); |
| brw_reg = brw_null_reg(); |
| break; |
| } |
| if (reg->abs) |
| brw_reg = brw_abs(brw_reg); |
| if (reg->negate) |
| brw_reg = negate(brw_reg); |
| |
| return brw_reg; |
| } |
| |
| void |
| fs_visitor::generate_code() |
| { |
| int last_native_inst = p->nr_insn; |
| const char *last_annotation_string = NULL; |
| ir_instruction *last_annotation_ir = NULL; |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) { |
| printf("Native code for fragment shader %d (%d-wide dispatch):\n", |
| prog->Name, c->dispatch_width); |
| } |
| |
| fs_cfg *cfg = NULL; |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) |
| cfg = new(mem_ctx) fs_cfg(this); |
| |
| foreach_list(node, &this->instructions) { |
| fs_inst *inst = (fs_inst *)node; |
| struct brw_reg src[3], dst; |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) { |
| foreach_list(node, &cfg->block_list) { |
| fs_bblock_link *link = (fs_bblock_link *)node; |
| fs_bblock *block = link->block; |
| |
| if (block->start == inst) { |
| printf(" START B%d", block->block_num); |
| foreach_list(predecessor_node, &block->parents) { |
| fs_bblock_link *predecessor_link = |
| (fs_bblock_link *)predecessor_node; |
| fs_bblock *predecessor_block = predecessor_link->block; |
| printf(" <-B%d", predecessor_block->block_num); |
| } |
| printf("\n"); |
| } |
| } |
| |
| if (last_annotation_ir != inst->ir) { |
| last_annotation_ir = inst->ir; |
| if (last_annotation_ir) { |
| printf(" "); |
| last_annotation_ir->print(); |
| printf("\n"); |
| } |
| } |
| if (last_annotation_string != inst->annotation) { |
| last_annotation_string = inst->annotation; |
| if (last_annotation_string) |
| printf(" %s\n", last_annotation_string); |
| } |
| } |
| |
| for (unsigned int i = 0; i < 3; i++) { |
| src[i] = brw_reg_from_fs_reg(&inst->src[i]); |
| |
| /* The accumulator result appears to get used for the |
| * conditional modifier generation. When negating a UD |
| * value, there is a 33rd bit generated for the sign in the |
| * accumulator value, so now you can't check, for example, |
| * equality with a 32-bit value. See piglit fs-op-neg-uvec4. |
| */ |
| assert(!inst->conditional_mod || |
| inst->src[i].type != BRW_REGISTER_TYPE_UD || |
| !inst->src[i].negate); |
| } |
| dst = brw_reg_from_fs_reg(&inst->dst); |
| |
| brw_set_conditionalmod(p, inst->conditional_mod); |
| brw_set_predicate_control(p, inst->predicated); |
| brw_set_predicate_inverse(p, inst->predicate_inverse); |
| brw_set_saturate(p, inst->saturate); |
| |
| if (inst->force_uncompressed || c->dispatch_width == 8) { |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| } else if (inst->force_sechalf) { |
| brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF); |
| } else { |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| } |
| |
| switch (inst->opcode) { |
| case BRW_OPCODE_MOV: |
| brw_MOV(p, dst, src[0]); |
| break; |
| case BRW_OPCODE_ADD: |
| brw_ADD(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_MUL: |
| brw_MUL(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_MACH: |
| brw_set_acc_write_control(p, 1); |
| brw_MACH(p, dst, src[0], src[1]); |
| brw_set_acc_write_control(p, 0); |
| break; |
| |
| case BRW_OPCODE_MAD: |
| brw_set_access_mode(p, BRW_ALIGN_16); |
| if (c->dispatch_width == 16) { |
| brw_set_compression_control(p, BRW_COMPRESSION_NONE); |
| brw_MAD(p, dst, src[0], src[1], src[2]); |
| brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF); |
| brw_MAD(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]), sechalf(src[2])); |
| brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED); |
| } else { |
| brw_MAD(p, dst, src[0], src[1], src[2]); |
| } |
| brw_set_access_mode(p, BRW_ALIGN_1); |
| break; |
| |
| case BRW_OPCODE_FRC: |
| brw_FRC(p, dst, src[0]); |
| break; |
| case BRW_OPCODE_RNDD: |
| brw_RNDD(p, dst, src[0]); |
| break; |
| case BRW_OPCODE_RNDE: |
| brw_RNDE(p, dst, src[0]); |
| break; |
| case BRW_OPCODE_RNDZ: |
| brw_RNDZ(p, dst, src[0]); |
| break; |
| |
| case BRW_OPCODE_AND: |
| brw_AND(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_OR: |
| brw_OR(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_XOR: |
| brw_XOR(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_NOT: |
| brw_NOT(p, dst, src[0]); |
| break; |
| case BRW_OPCODE_ASR: |
| brw_ASR(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_SHR: |
| brw_SHR(p, dst, src[0], src[1]); |
| break; |
| case BRW_OPCODE_SHL: |
| brw_SHL(p, dst, src[0], src[1]); |
| break; |
| |
| case BRW_OPCODE_CMP: |
| brw_CMP(p, dst, inst->conditional_mod, src[0], src[1]); |
| break; |
| case BRW_OPCODE_SEL: |
| brw_SEL(p, dst, src[0], src[1]); |
| break; |
| |
| case BRW_OPCODE_IF: |
| if (inst->src[0].file != BAD_FILE) { |
| /* The instruction has an embedded compare (only allowed on gen6) */ |
| assert(intel->gen == 6); |
| gen6_IF(p, inst->conditional_mod, src[0], src[1]); |
| } else { |
| brw_IF(p, c->dispatch_width == 16 ? BRW_EXECUTE_16 : BRW_EXECUTE_8); |
| } |
| break; |
| |
| case BRW_OPCODE_ELSE: |
| brw_ELSE(p); |
| break; |
| case BRW_OPCODE_ENDIF: |
| brw_ENDIF(p); |
| break; |
| |
| case BRW_OPCODE_DO: |
| brw_DO(p, BRW_EXECUTE_8); |
| break; |
| |
| case BRW_OPCODE_BREAK: |
| brw_BREAK(p); |
| brw_set_predicate_control(p, BRW_PREDICATE_NONE); |
| break; |
| case BRW_OPCODE_CONTINUE: |
| /* FINISHME: We need to write the loop instruction support still. */ |
| if (intel->gen >= 6) |
| gen6_CONT(p); |
| else |
| brw_CONT(p); |
| brw_set_predicate_control(p, BRW_PREDICATE_NONE); |
| break; |
| |
| case BRW_OPCODE_WHILE: |
| brw_WHILE(p); |
| break; |
| |
| case SHADER_OPCODE_RCP: |
| case SHADER_OPCODE_RSQ: |
| case SHADER_OPCODE_SQRT: |
| case SHADER_OPCODE_EXP2: |
| case SHADER_OPCODE_LOG2: |
| case SHADER_OPCODE_SIN: |
| case SHADER_OPCODE_COS: |
| if (intel->gen >= 7) { |
| generate_math1_gen7(inst, dst, src[0]); |
| } else if (intel->gen == 6) { |
| generate_math1_gen6(inst, dst, src[0]); |
| } else { |
| generate_math_gen4(inst, dst, src[0]); |
| } |
| break; |
| case SHADER_OPCODE_INT_QUOTIENT: |
| case SHADER_OPCODE_INT_REMAINDER: |
| case SHADER_OPCODE_POW: |
| if (intel->gen >= 7) { |
| generate_math2_gen7(inst, dst, src[0], src[1]); |
| } else if (intel->gen == 6) { |
| generate_math2_gen6(inst, dst, src[0], src[1]); |
| } else { |
| generate_math_gen4(inst, dst, src[0]); |
| } |
| break; |
| case FS_OPCODE_PIXEL_X: |
| generate_pixel_xy(dst, true); |
| break; |
| case FS_OPCODE_PIXEL_Y: |
| generate_pixel_xy(dst, false); |
| break; |
| case FS_OPCODE_CINTERP: |
| brw_MOV(p, dst, src[0]); |
| break; |
| case FS_OPCODE_LINTERP: |
| generate_linterp(inst, dst, src); |
| break; |
| case SHADER_OPCODE_TEX: |
| case FS_OPCODE_TXB: |
| case SHADER_OPCODE_TXD: |
| case SHADER_OPCODE_TXF: |
| case SHADER_OPCODE_TXL: |
| case SHADER_OPCODE_TXS: |
| generate_tex(inst, dst, src[0]); |
| break; |
| case FS_OPCODE_DISCARD: |
| generate_discard(inst); |
| break; |
| case FS_OPCODE_DDX: |
| generate_ddx(inst, dst, src[0]); |
| break; |
| case FS_OPCODE_DDY: |
| /* Make sure fp->UsesDFdy flag got set (otherwise there's no |
| * guarantee that c->key.render_to_fbo is set). |
| */ |
| assert(fp->UsesDFdy); |
| generate_ddy(inst, dst, src[0], c->key.render_to_fbo); |
| break; |
| |
| case FS_OPCODE_SPILL: |
| generate_spill(inst, src[0]); |
| break; |
| |
| case FS_OPCODE_UNSPILL: |
| generate_unspill(inst, dst); |
| break; |
| |
| case FS_OPCODE_PULL_CONSTANT_LOAD: |
| generate_pull_constant_load(inst, dst, src[0], src[1]); |
| break; |
| |
| case FS_OPCODE_FB_WRITE: |
| generate_fb_write(inst); |
| break; |
| |
| case FS_OPCODE_MOV_DISPATCH_TO_FLAGS: |
| generate_mov_dispatch_to_flags(); |
| break; |
| |
| default: |
| if (inst->opcode < (int)ARRAY_SIZE(brw_opcodes)) { |
| _mesa_problem(ctx, "Unsupported opcode `%s' in FS", |
| brw_opcodes[inst->opcode].name); |
| } else { |
| _mesa_problem(ctx, "Unsupported opcode %d in FS", inst->opcode); |
| } |
| fail("unsupported opcode in FS\n"); |
| } |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) { |
| for (unsigned int i = last_native_inst; i < p->nr_insn; i++) { |
| if (0) { |
| printf("0x%08x 0x%08x 0x%08x 0x%08x ", |
| ((uint32_t *)&p->store[i])[3], |
| ((uint32_t *)&p->store[i])[2], |
| ((uint32_t *)&p->store[i])[1], |
| ((uint32_t *)&p->store[i])[0]); |
| } |
| brw_disasm(stdout, &p->store[i], intel->gen); |
| } |
| |
| foreach_list(node, &cfg->block_list) { |
| fs_bblock_link *link = (fs_bblock_link *)node; |
| fs_bblock *block = link->block; |
| |
| if (block->end == inst) { |
| printf(" END B%d", block->block_num); |
| foreach_list(successor_node, &block->children) { |
| fs_bblock_link *successor_link = |
| (fs_bblock_link *)successor_node; |
| fs_bblock *successor_block = successor_link->block; |
| printf(" ->B%d", successor_block->block_num); |
| } |
| printf("\n"); |
| } |
| } |
| } |
| |
| last_native_inst = p->nr_insn; |
| } |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) { |
| printf("\n"); |
| } |
| |
| brw_set_uip_jip(p); |
| |
| /* OK, while the INTEL_DEBUG=wm above is very nice for debugging FS |
| * emit issues, it doesn't get the jump distances into the output, |
| * which is often something we want to debug. So this is here in |
| * case you're doing that. |
| */ |
| if (0) { |
| if (unlikely(INTEL_DEBUG & DEBUG_WM)) { |
| for (unsigned int i = 0; i < p->nr_insn; i++) { |
| printf("0x%08x 0x%08x 0x%08x 0x%08x ", |
| ((uint32_t *)&p->store[i])[3], |
| ((uint32_t *)&p->store[i])[2], |
| ((uint32_t *)&p->store[i])[1], |
| ((uint32_t *)&p->store[i])[0]); |
| brw_disasm(stdout, &p->store[i], intel->gen); |
| } |
| } |
| } |
| } |