| /************************************************************************** |
| * |
| * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * 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, sub license, 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 NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. |
| * |
| **************************************************************************/ |
| |
| #include "i915_reg.h" |
| #include "i915_context.h" |
| #include "i915_fpc.h" |
| #include "util/u_math.h" |
| |
| uint |
| i915_get_temp(struct i915_fp_compile *p) |
| { |
| int bit = ffs(~p->temp_flag); |
| if (!bit) { |
| i915_program_error(p, "i915_get_temp: out of temporaries"); |
| return 0; |
| } |
| |
| p->temp_flag |= 1 << (bit - 1); |
| return bit - 1; |
| } |
| |
| |
| static void |
| i915_release_temp(struct i915_fp_compile *p, int reg) |
| { |
| p->temp_flag &= ~(1 << reg); |
| } |
| |
| |
| /** |
| * Get unpreserved temporary, a temp whose value is not preserved between |
| * PS program phases. |
| */ |
| uint |
| i915_get_utemp(struct i915_fp_compile * p) |
| { |
| int bit = ffs(~p->utemp_flag); |
| if (!bit) { |
| i915_program_error(p, "i915_get_utemp: out of temporaries"); |
| return 0; |
| } |
| |
| p->utemp_flag |= 1 << (bit - 1); |
| return UREG(REG_TYPE_U, (bit - 1)); |
| } |
| |
| void |
| i915_release_utemps(struct i915_fp_compile *p) |
| { |
| p->utemp_flag = ~0x7; |
| } |
| |
| |
| uint |
| i915_emit_decl(struct i915_fp_compile *p, |
| uint type, uint nr, uint d0_flags) |
| { |
| uint reg = UREG(type, nr); |
| |
| if (type == REG_TYPE_T) { |
| if (p->decl_t & (1 << nr)) |
| return reg; |
| |
| p->decl_t |= (1 << nr); |
| } |
| else if (type == REG_TYPE_S) { |
| if (p->decl_s & (1 << nr)) |
| return reg; |
| |
| p->decl_s |= (1 << nr); |
| } |
| else |
| return reg; |
| |
| if (p->decl< p->declarations + I915_PROGRAM_SIZE) { |
| *(p->decl++) = (D0_DCL | D0_DEST(reg) | d0_flags); |
| *(p->decl++) = D1_MBZ; |
| *(p->decl++) = D2_MBZ; |
| } |
| else |
| i915_program_error(p, "Out of declarations"); |
| |
| p->nr_decl_insn++; |
| return reg; |
| } |
| |
| uint |
| i915_emit_arith(struct i915_fp_compile * p, |
| uint op, |
| uint dest, |
| uint mask, |
| uint saturate, uint src0, uint src1, uint src2) |
| { |
| uint c[3]; |
| uint nr_const = 0; |
| |
| assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST); |
| dest = UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest)); |
| assert(dest); |
| |
| if (GET_UREG_TYPE(src0) == REG_TYPE_CONST) |
| c[nr_const++] = 0; |
| if (GET_UREG_TYPE(src1) == REG_TYPE_CONST) |
| c[nr_const++] = 1; |
| if (GET_UREG_TYPE(src2) == REG_TYPE_CONST) |
| c[nr_const++] = 2; |
| |
| /* Recursively call this function to MOV additional const values |
| * into temporary registers. Use utemp registers for this - |
| * currently shouldn't be possible to run out, but keep an eye on |
| * this. |
| */ |
| if (nr_const > 1) { |
| uint s[3], first, i, old_utemp_flag; |
| |
| s[0] = src0; |
| s[1] = src1; |
| s[2] = src2; |
| old_utemp_flag = p->utemp_flag; |
| |
| first = GET_UREG_NR(s[c[0]]); |
| for (i = 1; i < nr_const; i++) { |
| if (GET_UREG_NR(s[c[i]]) != first) { |
| uint tmp = i915_get_utemp(p); |
| |
| i915_emit_arith(p, A0_MOV, tmp, A0_DEST_CHANNEL_ALL, 0, |
| s[c[i]], 0, 0); |
| s[c[i]] = tmp; |
| } |
| } |
| |
| src0 = s[0]; |
| src1 = s[1]; |
| src2 = s[2]; |
| p->utemp_flag = old_utemp_flag; /* restore */ |
| } |
| |
| if (p->csr< p->program + I915_PROGRAM_SIZE) { |
| *(p->csr++) = (op | A0_DEST(dest) | mask | saturate | A0_SRC0(src0)); |
| *(p->csr++) = (A1_SRC0(src0) | A1_SRC1(src1)); |
| *(p->csr++) = (A2_SRC1(src1) | A2_SRC2(src2)); |
| } |
| else |
| i915_program_error(p, "Out of instructions"); |
| |
| if (GET_UREG_TYPE(dest) == REG_TYPE_R) |
| p->register_phases[GET_UREG_NR(dest)] = p->nr_tex_indirect; |
| |
| p->nr_alu_insn++; |
| return dest; |
| } |
| |
| |
| /** |
| * Emit a texture load or texkill instruction. |
| * \param dest the dest i915 register |
| * \param destmask the dest register writemask |
| * \param sampler the i915 sampler register |
| * \param coord the i915 source texcoord operand |
| * \param opcode the instruction opcode |
| */ |
| uint i915_emit_texld( struct i915_fp_compile *p, |
| uint dest, |
| uint destmask, |
| uint sampler, |
| uint coord, |
| uint opcode, |
| uint num_coord ) |
| { |
| const uint k = UREG(GET_UREG_TYPE(coord), GET_UREG_NR(coord)); |
| |
| int temp = -1; |
| uint ignore = 0; |
| |
| /* Eliminate the useless texture coordinates. Otherwise we end up generating |
| * a swizzle for no reason below. */ |
| switch(num_coord) { |
| case 0: |
| /* Ignore x */ |
| ignore |= (0xf << UREG_CHANNEL_X_SHIFT); |
| case 1: |
| /* Ignore y */ |
| ignore |= (0xf << UREG_CHANNEL_Y_SHIFT); |
| case 2: |
| /* Ignore z */ |
| ignore |= (0xf << UREG_CHANNEL_Z_SHIFT); |
| case 3: |
| /* Ignore w */ |
| ignore |= (0xf << UREG_CHANNEL_W_SHIFT); |
| } |
| |
| if ( (coord & ~ignore ) != (k & ~ignore) ) { |
| /* texcoord is swizzled or negated. Need to allocate a new temporary |
| * register (a utemp / unpreserved temp) won't do. |
| */ |
| uint tempReg; |
| |
| temp = i915_get_temp(p); /* get temp reg index */ |
| tempReg = UREG(REG_TYPE_R, temp); /* make i915 register */ |
| |
| i915_emit_arith( p, A0_MOV, |
| tempReg, A0_DEST_CHANNEL_ALL, /* dest reg, writemask */ |
| 0, /* saturate */ |
| coord, 0, 0 ); /* src0, src1, src2 */ |
| |
| /* new src texcoord is tempReg */ |
| coord = tempReg; |
| } |
| |
| /* Don't worry about saturate as we only support |
| */ |
| if (destmask != A0_DEST_CHANNEL_ALL) { |
| /* if not writing to XYZW... */ |
| uint tmp = i915_get_utemp(p); |
| i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, sampler, coord, opcode, num_coord ); |
| i915_emit_arith( p, A0_MOV, dest, destmask, 0, tmp, 0, 0 ); |
| /* XXX release utemp here? */ |
| } |
| else { |
| assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST); |
| assert(dest == UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest))); |
| |
| /* Output register being oC or oD defines a phase boundary */ |
| if (GET_UREG_TYPE(dest) == REG_TYPE_OC || |
| GET_UREG_TYPE(dest) == REG_TYPE_OD) |
| p->nr_tex_indirect++; |
| |
| /* Reading from an r# register whose contents depend on output of the |
| * current phase defines a phase boundary. |
| */ |
| if (GET_UREG_TYPE(coord) == REG_TYPE_R && |
| p->register_phases[GET_UREG_NR(coord)] == p->nr_tex_indirect) |
| p->nr_tex_indirect++; |
| |
| if (p->csr< p->program + I915_PROGRAM_SIZE) { |
| *(p->csr++) = (opcode | |
| T0_DEST( dest ) | |
| T0_SAMPLER( sampler )); |
| |
| *(p->csr++) = T1_ADDRESS_REG( coord ); |
| *(p->csr++) = T2_MBZ; |
| } |
| else |
| i915_program_error(p, "Out of instructions"); |
| |
| if (GET_UREG_TYPE(dest) == REG_TYPE_R) |
| p->register_phases[GET_UREG_NR(dest)] = p->nr_tex_indirect; |
| |
| p->nr_tex_insn++; |
| } |
| |
| if (temp >= 0) |
| i915_release_temp(p, temp); |
| |
| return dest; |
| } |
| |
| |
| uint |
| i915_emit_const1f(struct i915_fp_compile * p, float c0) |
| { |
| struct i915_fragment_shader *ifs = p->shader; |
| unsigned reg, idx; |
| |
| if (c0 == 0.0) |
| return swizzle(UREG(REG_TYPE_R, 0), ZERO, ZERO, ZERO, ZERO); |
| if (c0 == 1.0) |
| return swizzle(UREG(REG_TYPE_R, 0), ONE, ONE, ONE, ONE); |
| |
| for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { |
| if (ifs->constant_flags[reg] == I915_CONSTFLAG_USER) |
| continue; |
| for (idx = 0; idx < 4; idx++) { |
| if (!(ifs->constant_flags[reg] & (1 << idx)) || |
| ifs->constants[reg][idx] == c0) { |
| ifs->constants[reg][idx] = c0; |
| ifs->constant_flags[reg] |= 1 << idx; |
| if (reg + 1 > ifs->num_constants) |
| ifs->num_constants = reg + 1; |
| return swizzle(UREG(REG_TYPE_CONST, reg), idx, ZERO, ZERO, ONE); |
| } |
| } |
| } |
| |
| i915_program_error(p, "i915_emit_const1f: out of constants"); |
| return 0; |
| } |
| |
| uint |
| i915_emit_const2f(struct i915_fp_compile * p, float c0, float c1) |
| { |
| struct i915_fragment_shader *ifs = p->shader; |
| unsigned reg, idx; |
| |
| if (c0 == 0.0) |
| return swizzle(i915_emit_const1f(p, c1), ZERO, X, Z, W); |
| if (c0 == 1.0) |
| return swizzle(i915_emit_const1f(p, c1), ONE, X, Z, W); |
| |
| if (c1 == 0.0) |
| return swizzle(i915_emit_const1f(p, c0), X, ZERO, Z, W); |
| if (c1 == 1.0) |
| return swizzle(i915_emit_const1f(p, c0), X, ONE, Z, W); |
| |
| // XXX emit swizzle here for 0, 1, -1 and any combination thereof |
| // we can use swizzle + neg for that |
| for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { |
| if (ifs->constant_flags[reg] == 0xf || |
| ifs->constant_flags[reg] == I915_CONSTFLAG_USER) |
| continue; |
| for (idx = 0; idx < 3; idx++) { |
| if (!(ifs->constant_flags[reg] & (3 << idx))) { |
| ifs->constants[reg][idx + 0] = c0; |
| ifs->constants[reg][idx + 1] = c1; |
| ifs->constant_flags[reg] |= 3 << idx; |
| if (reg + 1 > ifs->num_constants) |
| ifs->num_constants = reg + 1; |
| return swizzle(UREG(REG_TYPE_CONST, reg), idx, idx + 1, ZERO, ONE); |
| } |
| } |
| } |
| |
| i915_program_error(p, "i915_emit_const2f: out of constants"); |
| return 0; |
| } |
| |
| uint |
| i915_emit_const4f(struct i915_fp_compile * p, |
| float c0, float c1, float c2, float c3) |
| { |
| struct i915_fragment_shader *ifs = p->shader; |
| unsigned reg; |
| |
| // XXX emit swizzle here for 0, 1, -1 and any combination thereof |
| // we can use swizzle + neg for that |
| for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { |
| if (ifs->constant_flags[reg] == 0xf && |
| ifs->constants[reg][0] == c0 && |
| ifs->constants[reg][1] == c1 && |
| ifs->constants[reg][2] == c2 && |
| ifs->constants[reg][3] == c3) { |
| return UREG(REG_TYPE_CONST, reg); |
| } |
| else if (ifs->constant_flags[reg] == 0) { |
| |
| ifs->constants[reg][0] = c0; |
| ifs->constants[reg][1] = c1; |
| ifs->constants[reg][2] = c2; |
| ifs->constants[reg][3] = c3; |
| ifs->constant_flags[reg] = 0xf; |
| if (reg + 1 > ifs->num_constants) |
| ifs->num_constants = reg + 1; |
| return UREG(REG_TYPE_CONST, reg); |
| } |
| } |
| |
| i915_program_error(p, "i915_emit_const4f: out of constants"); |
| return 0; |
| } |
| |
| |
| uint |
| i915_emit_const4fv(struct i915_fp_compile * p, const float * c) |
| { |
| return i915_emit_const4f(p, c[0], c[1], c[2], c[3]); |
| } |
