+++ /dev/null
-/*
- * Copyright © 2012 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_fp.cpp
- *
- * Implementation of the compiler for GL_ARB_fragment_program shaders on top
- * of the GLSL compiler backend.
- */
-
-#include "brw_context.h"
-#include "brw_fs.h"
-
-void
-fs_visitor::emit_fp_alu1(enum opcode opcode,
- const struct prog_instruction *fpi,
- fs_reg dst, fs_reg src)
-{
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i))
- emit(opcode, offset(dst, i), offset(src, i));
- }
-}
-
-void
-fs_visitor::emit_fp_alu2(enum opcode opcode,
- const struct prog_instruction *fpi,
- fs_reg dst, fs_reg src0, fs_reg src1)
-{
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i))
- emit(opcode, offset(dst, i),
- offset(src0, i), offset(src1, i));
- }
-}
-
-void
-fs_visitor::emit_fp_minmax(const prog_instruction *fpi,
- fs_reg dst, fs_reg src0, fs_reg src1)
-{
- enum brw_conditional_mod conditionalmod;
- if (fpi->Opcode == OPCODE_MIN)
- conditionalmod = BRW_CONDITIONAL_L;
- else
- conditionalmod = BRW_CONDITIONAL_GE;
-
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- emit_minmax(conditionalmod, offset(dst, i),
- offset(src0, i), offset(src1, i));
- }
- }
-}
-
-void
-fs_visitor::emit_fp_sop(enum brw_conditional_mod conditional_mod,
- const struct prog_instruction *fpi,
- fs_reg dst, fs_reg src0, fs_reg src1,
- fs_reg one)
-{
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- fs_inst *inst;
-
- emit(CMP(reg_null_d, offset(src0, i), offset(src1, i),
- conditional_mod));
-
- inst = emit(BRW_OPCODE_SEL, offset(dst, i), one, fs_reg(0.0f));
- inst->predicate = BRW_PREDICATE_NORMAL;
- }
- }
-}
-
-void
-fs_visitor::emit_fp_scalar_write(const struct prog_instruction *fpi,
- fs_reg dst, fs_reg src)
-{
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i))
- emit(MOV(offset(dst, i), src));
- }
-}
-
-void
-fs_visitor::emit_fp_scalar_math(enum opcode opcode,
- const struct prog_instruction *fpi,
- fs_reg dst, fs_reg src)
-{
- fs_reg temp = vgrf(glsl_type::float_type);
- emit_math(opcode, temp, src);
- emit_fp_scalar_write(fpi, dst, temp);
-}
-
-void
-fs_visitor::emit_fragment_program_code()
-{
- setup_fp_regs();
-
- /* Keep a reg with 1.0 around, for reuse by emit_fp_sop so that it can just
- * be:
- *
- * sel.f0 dst 1.0 0.0
- *
- * instead of
- *
- * mov dst 0.0
- * mov.f0 dst 1.0
- */
- fs_reg one = vgrf(glsl_type::float_type);
- emit(MOV(one, fs_reg(1.0f)));
-
- for (unsigned int insn = 0; insn < prog->NumInstructions; insn++) {
- const struct prog_instruction *fpi = &prog->Instructions[insn];
- base_ir = fpi;
-
- fs_reg dst;
- fs_reg src[3];
-
- /* We always emit into a temporary destination register to avoid
- * aliasing issues.
- */
- dst = vgrf(glsl_type::vec4_type);
-
- for (int i = 0; i < 3; i++)
- src[i] = get_fp_src_reg(&fpi->SrcReg[i]);
-
- switch (fpi->Opcode) {
- case OPCODE_ABS:
- src[0].abs = true;
- src[0].negate = false;
- emit_fp_alu1(BRW_OPCODE_MOV, fpi, dst, src[0]);
- break;
-
- case OPCODE_ADD:
- emit_fp_alu2(BRW_OPCODE_ADD, fpi, dst, src[0], src[1]);
- break;
-
- case OPCODE_CMP:
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- fs_inst *inst;
-
- emit(CMP(reg_null_f, offset(src[0], i), fs_reg(0.0f),
- BRW_CONDITIONAL_L));
-
- inst = emit(BRW_OPCODE_SEL, offset(dst, i),
- offset(src[1], i), offset(src[2], i));
- inst->predicate = BRW_PREDICATE_NORMAL;
- }
- }
- break;
-
- case OPCODE_COS:
- emit_fp_scalar_math(SHADER_OPCODE_COS, fpi, dst, src[0]);
- break;
-
- case OPCODE_DP2:
- case OPCODE_DP3:
- case OPCODE_DP4:
- case OPCODE_DPH: {
- fs_reg mul = vgrf(glsl_type::float_type);
- fs_reg acc = vgrf(glsl_type::float_type);
- int count;
-
- switch (fpi->Opcode) {
- case OPCODE_DP2: count = 2; break;
- case OPCODE_DP3: count = 3; break;
- case OPCODE_DP4: count = 4; break;
- case OPCODE_DPH: count = 3; break;
- default: unreachable("not reached");
- }
-
- emit(MUL(acc, offset(src[0], 0), offset(src[1], 0)));
- for (int i = 1; i < count; i++) {
- emit(MUL(mul, offset(src[0], i), offset(src[1], i)));
- emit(ADD(acc, acc, mul));
- }
-
- if (fpi->Opcode == OPCODE_DPH)
- emit(ADD(acc, acc, offset(src[1], 3)));
-
- emit_fp_scalar_write(fpi, dst, acc);
- break;
- }
-
- case OPCODE_DST:
- if (fpi->DstReg.WriteMask & WRITEMASK_X)
- emit(MOV(dst, fs_reg(1.0f)));
- if (fpi->DstReg.WriteMask & WRITEMASK_Y) {
- emit(MUL(offset(dst, 1),
- offset(src[0], 1), offset(src[1], 1)));
- }
- if (fpi->DstReg.WriteMask & WRITEMASK_Z)
- emit(MOV(offset(dst, 2), offset(src[0], 2)));
- if (fpi->DstReg.WriteMask & WRITEMASK_W)
- emit(MOV(offset(dst, 3), offset(src[1], 3)));
- break;
-
- case OPCODE_EX2:
- emit_fp_scalar_math(SHADER_OPCODE_EXP2, fpi, dst, src[0]);
- break;
-
- case OPCODE_FLR:
- emit_fp_alu1(BRW_OPCODE_RNDD, fpi, dst, src[0]);
- break;
-
- case OPCODE_FRC:
- emit_fp_alu1(BRW_OPCODE_FRC, fpi, dst, src[0]);
- break;
-
- case OPCODE_KIL: {
- for (int i = 0; i < 4; i++) {
- /* In most cases the argument to a KIL will be something like
- * TEMP[0].wwww, so there's no point in checking whether .w is < 0
- * 4 times in a row.
- */
- if (i > 0 &&
- GET_SWZ(fpi->SrcReg[0].Swizzle, i) ==
- GET_SWZ(fpi->SrcReg[0].Swizzle, i - 1) &&
- ((fpi->SrcReg[0].Negate >> i) & 1) ==
- ((fpi->SrcReg[0].Negate >> (i - 1)) & 1)) {
- continue;
- }
-
-
- /* Emit an instruction that's predicated on the current
- * undiscarded pixels, and updates just those pixels to be
- * turned off.
- */
- fs_inst *cmp = emit(CMP(reg_null_f, offset(src[0], i),
- fs_reg(0.0f), BRW_CONDITIONAL_GE));
- cmp->predicate = BRW_PREDICATE_NORMAL;
- cmp->flag_subreg = 1;
-
- if (devinfo->gen >= 6)
- emit_discard_jump();
- }
- break;
- }
-
- case OPCODE_LG2:
- emit_fp_scalar_math(SHADER_OPCODE_LOG2, fpi, dst, src[0]);
- break;
-
- case OPCODE_LIT:
- /* From the ARB_fragment_program spec:
- *
- * tmp = VectorLoad(op0);
- * if (tmp.x < 0) tmp.x = 0;
- * if (tmp.y < 0) tmp.y = 0;
- * if (tmp.w < -(128.0-epsilon)) tmp.w = -(128.0-epsilon);
- * else if (tmp.w > 128-epsilon) tmp.w = 128-epsilon;
- * result.x = 1.0;
- * result.y = tmp.x;
- * result.z = (tmp.x > 0) ? RoughApproxPower(tmp.y, tmp.w) : 0.0;
- * result.w = 1.0;
- *
- * Note that we don't do the clamping to +/- 128. We didn't in
- * brw_wm_emit.c either.
- */
- if (fpi->DstReg.WriteMask & WRITEMASK_X)
- emit(MOV(offset(dst, 0), fs_reg(1.0f)));
-
- if (fpi->DstReg.WriteMask & WRITEMASK_YZ) {
- fs_inst *inst;
- emit(CMP(reg_null_f, offset(src[0], 0), fs_reg(0.0f),
- BRW_CONDITIONAL_LE));
-
- if (fpi->DstReg.WriteMask & WRITEMASK_Y) {
- emit(MOV(offset(dst, 1), offset(src[0], 0)));
- inst = emit(MOV(offset(dst, 1), fs_reg(0.0f)));
- inst->predicate = BRW_PREDICATE_NORMAL;
- }
-
- if (fpi->DstReg.WriteMask & WRITEMASK_Z) {
- emit_math(SHADER_OPCODE_POW, offset(dst, 2),
- offset(src[0], 1), offset(src[0], 3));
-
- inst = emit(MOV(offset(dst, 2), fs_reg(0.0f)));
- inst->predicate = BRW_PREDICATE_NORMAL;
- }
- }
-
- if (fpi->DstReg.WriteMask & WRITEMASK_W)
- emit(MOV(offset(dst, 3), fs_reg(1.0f)));
-
- break;
-
- case OPCODE_LRP:
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- fs_reg a = offset(src[0], i);
- fs_reg y = offset(src[1], i);
- fs_reg x = offset(src[2], i);
- emit_lrp(offset(dst, i), x, y, a);
- }
- }
- break;
-
- case OPCODE_MAD:
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- if (devinfo->gen >= 6) {
- emit(MAD(offset(dst, i), offset(src[2], i),
- offset(src[1], i), offset(src[0], i)));
- } else {
- fs_reg temp = vgrf(glsl_type::float_type);
- emit(MUL(temp, offset(src[0], i), offset(src[1], i)));
- emit(ADD(offset(dst, i), temp, offset(src[2], i)));
- }
- }
- }
- break;
-
- case OPCODE_MAX:
- emit_fp_minmax(fpi, dst, src[0], src[1]);
- break;
-
- case OPCODE_MOV:
- emit_fp_alu1(BRW_OPCODE_MOV, fpi, dst, src[0]);
- break;
-
- case OPCODE_MIN:
- emit_fp_minmax(fpi, dst, src[0], src[1]);
- break;
-
- case OPCODE_MUL:
- emit_fp_alu2(BRW_OPCODE_MUL, fpi, dst, src[0], src[1]);
- break;
-
- case OPCODE_POW: {
- fs_reg temp = vgrf(glsl_type::float_type);
- emit_math(SHADER_OPCODE_POW, temp, src[0], src[1]);
- emit_fp_scalar_write(fpi, dst, temp);
- break;
- }
-
- case OPCODE_RCP:
- emit_fp_scalar_math(SHADER_OPCODE_RCP, fpi, dst, src[0]);
- break;
-
- case OPCODE_RSQ:
- emit_fp_scalar_math(SHADER_OPCODE_RSQ, fpi, dst, src[0]);
- break;
-
- case OPCODE_SCS:
- if (fpi->DstReg.WriteMask & WRITEMASK_X) {
- emit_math(SHADER_OPCODE_COS, offset(dst, 0),
- offset(src[0], 0));
- }
-
- if (fpi->DstReg.WriteMask & WRITEMASK_Y) {
- emit_math(SHADER_OPCODE_SIN, offset(dst, 1),
- offset(src[0], 1));
- }
- break;
-
- case OPCODE_SGE:
- emit_fp_sop(BRW_CONDITIONAL_GE, fpi, dst, src[0], src[1], one);
- break;
-
- case OPCODE_SIN:
- emit_fp_scalar_math(SHADER_OPCODE_SIN, fpi, dst, src[0]);
- break;
-
- case OPCODE_SLT:
- emit_fp_sop(BRW_CONDITIONAL_L, fpi, dst, src[0], src[1], one);
- break;
-
- case OPCODE_SUB: {
- fs_reg neg_src1 = src[1];
- neg_src1.negate = !src[1].negate;
-
- emit_fp_alu2(BRW_OPCODE_ADD, fpi, dst, src[0], neg_src1);
- break;
- }
-
- case OPCODE_TEX:
- case OPCODE_TXB:
- case OPCODE_TXP: {
- ir_texture_opcode op;
- fs_reg lod;
- fs_reg dpdy;
- fs_reg coordinate = src[0];
- fs_reg shadow_c;
- fs_reg sample_index;
- fs_reg texel_offset; /* No offsets; leave as BAD_FILE. */
-
- switch (fpi->Opcode) {
- case OPCODE_TEX:
- op = ir_tex;
- break;
- case OPCODE_TXP: {
- op = ir_tex;
-
- coordinate = vgrf(glsl_type::vec3_type);
- fs_reg invproj = vgrf(glsl_type::float_type);
- emit_math(SHADER_OPCODE_RCP, invproj, offset(src[0], 3));
- for (int i = 0; i < 3; i++) {
- emit(MUL(offset(coordinate, i),
- offset(src[0], i), invproj));
- }
- break;
- }
- case OPCODE_TXB:
- op = ir_txb;
- lod = offset(src[0], 3);
- break;
- default:
- unreachable("not reached");
- }
-
- int coord_components;
- switch (fpi->TexSrcTarget) {
- case TEXTURE_1D_INDEX:
- coord_components = 1;
- break;
-
- case TEXTURE_2D_INDEX:
- case TEXTURE_1D_ARRAY_INDEX:
- case TEXTURE_RECT_INDEX:
- case TEXTURE_EXTERNAL_INDEX:
- coord_components = 2;
- break;
-
- case TEXTURE_3D_INDEX:
- case TEXTURE_2D_ARRAY_INDEX:
- coord_components = 3;
- break;
-
- case TEXTURE_CUBE_INDEX: {
- coord_components = 3;
-
- fs_reg temp = vgrf(glsl_type::float_type);
- fs_reg cubecoord = vgrf(glsl_type::vec3_type);
- fs_reg abscoord = coordinate;
- abscoord.negate = false;
- abscoord.abs = true;
- emit_minmax(BRW_CONDITIONAL_GE, temp,
- offset(abscoord, 0), offset(abscoord, 1));
- emit_minmax(BRW_CONDITIONAL_GE, temp,
- temp, offset(abscoord, 2));
- emit_math(SHADER_OPCODE_RCP, temp, temp);
- for (int i = 0; i < 3; i++) {
- emit(MUL(offset(cubecoord, i),
- offset(coordinate, i), temp));
- }
-
- coordinate = cubecoord;
- break;
- }
-
- default:
- unreachable("not reached");
- }
-
- if (fpi->TexShadow)
- shadow_c = offset(coordinate, 2);
-
- emit_texture(op, glsl_type::vec4_type, coordinate, coord_components,
- shadow_c, lod, dpdy, 0, sample_index,
- reg_undef, /* offset */
- reg_undef, /* mcs */
- 0, /* gather component */
- false, /* is cube array */
- fpi->TexSrcTarget == TEXTURE_RECT_INDEX,
- fpi->TexSrcUnit, fs_reg(fpi->TexSrcUnit),
- fpi->TexSrcUnit);
- dst = this->result;
-
- break;
- }
-
- case OPCODE_SWZ:
- /* Note that SWZ's extended swizzles are handled in the general
- * get_src_reg() code.
- */
- emit_fp_alu1(BRW_OPCODE_MOV, fpi, dst, src[0]);
- break;
-
- case OPCODE_XPD:
- for (int i = 0; i < 3; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- int i1 = (i + 1) % 3;
- int i2 = (i + 2) % 3;
-
- fs_reg temp = vgrf(glsl_type::float_type);
- fs_reg neg_src1_1 = offset(src[1], i1);
- neg_src1_1.negate = !neg_src1_1.negate;
- emit(MUL(temp, offset(src[0], i2), neg_src1_1));
- emit(MUL(offset(dst, i),
- offset(src[0], i1), offset(src[1], i2)));
- emit(ADD(offset(dst, i), offset(dst, i), temp));
- }
- }
- break;
-
- case OPCODE_END:
- break;
-
- default:
- _mesa_problem(ctx, "Unsupported opcode %s in fragment program\n",
- _mesa_opcode_string(fpi->Opcode));
- }
-
- /* To handle saturates, we emit a MOV with a saturate bit, which
- * optimization should fold into the preceding instructions when safe.
- */
- if (_mesa_num_inst_dst_regs(fpi->Opcode) != 0) {
- fs_reg real_dst = get_fp_dst_reg(&fpi->DstReg);
-
- for (int i = 0; i < 4; i++) {
- if (fpi->DstReg.WriteMask & (1 << i)) {
- fs_inst *inst = emit(MOV(offset(real_dst, i),
- offset(dst, i)));
- inst->saturate = fpi->SaturateMode;
- }
- }
- }
- }
-
- /* Epilogue:
- *
- * Fragment depth has this strange convention of being the .z component of
- * a vec4. emit_fb_write() wants to see a float value, instead.
- */
- this->current_annotation = "result.depth write";
- if (frag_depth.file != BAD_FILE) {
- fs_reg temp = vgrf(glsl_type::float_type);
- emit(MOV(temp, offset(frag_depth, 2)));
- frag_depth = temp;
- }
-}
-
-void
-fs_visitor::setup_fp_regs()
-{
- /* PROGRAM_TEMPORARY */
- int num_temp = prog->NumTemporaries;
- fp_temp_regs = rzalloc_array(mem_ctx, fs_reg, num_temp);
- for (int i = 0; i < num_temp; i++)
- fp_temp_regs[i] = vgrf(glsl_type::vec4_type);
-
- /* PROGRAM_STATE_VAR etc. */
- if (dispatch_width == 8) {
- for (unsigned p = 0;
- p < prog->Parameters->NumParameters; p++) {
- for (unsigned int i = 0; i < 4; i++) {
- stage_prog_data->param[uniforms++] =
- &prog->Parameters->ParameterValues[p][i];
- }
- }
- }
-
- fp_input_regs = rzalloc_array(mem_ctx, fs_reg, VARYING_SLOT_MAX);
- for (int i = 0; i < VARYING_SLOT_MAX; i++) {
- if (prog->InputsRead & BITFIELD64_BIT(i)) {
- this->current_annotation = ralloc_asprintf(ctx, "interpolate input %d",
- i);
-
- switch (i) {
- case VARYING_SLOT_POS:
- {
- assert(stage == MESA_SHADER_FRAGMENT);
- gl_fragment_program *fp = (gl_fragment_program*) prog;
- fp_input_regs[i] =
- *emit_fragcoord_interpolation(fp->PixelCenterInteger,
- fp->OriginUpperLeft);
- }
- break;
- case VARYING_SLOT_FACE:
- fp_input_regs[i] = *emit_frontfacing_interpolation();
- break;
- default:
- fp_input_regs[i] = vgrf(glsl_type::vec4_type);
- emit_general_interpolation(fp_input_regs[i], "fp_input",
- glsl_type::vec4_type,
- INTERP_QUALIFIER_NONE,
- i, false, false);
-
- if (i == VARYING_SLOT_FOGC) {
- emit(MOV(offset(fp_input_regs[i], 1), fs_reg(0.0f)));
- emit(MOV(offset(fp_input_regs[i], 2), fs_reg(0.0f)));
- emit(MOV(offset(fp_input_regs[i], 3), fs_reg(1.0f)));
- }
-
- break;
- }
-
- this->current_annotation = NULL;
- }
- }
-}
-
-fs_reg
-fs_visitor::get_fp_dst_reg(const prog_dst_register *dst)
-{
- assert(stage == MESA_SHADER_FRAGMENT);
- brw_wm_prog_key *key = (brw_wm_prog_key*) this->key;
-
- switch (dst->File) {
- case PROGRAM_TEMPORARY:
- return fp_temp_regs[dst->Index];
-
- case PROGRAM_OUTPUT:
- if (dst->Index == FRAG_RESULT_DEPTH) {
- if (frag_depth.file == BAD_FILE)
- frag_depth = vgrf(glsl_type::vec4_type);
- return frag_depth;
- } else if (dst->Index == FRAG_RESULT_COLOR) {
- if (outputs[0].file == BAD_FILE) {
- outputs[0] = vgrf(glsl_type::vec4_type);
- output_components[0] = 4;
-
- /* Tell emit_fb_writes() to smear fragment.color across all the
- * color attachments.
- */
- for (int i = 1; i < key->nr_color_regions; i++) {
- outputs[i] = outputs[0];
- output_components[i] = output_components[0];
- }
- }
- return outputs[0];
- } else {
- int output_index = dst->Index - FRAG_RESULT_DATA0;
- if (outputs[output_index].file == BAD_FILE) {
- outputs[output_index] = vgrf(glsl_type::vec4_type);
- }
- output_components[output_index] = 4;
- return outputs[output_index];
- }
-
- case PROGRAM_UNDEFINED:
- return fs_reg();
-
- default:
- _mesa_problem(ctx, "bad dst register file: %s\n",
- _mesa_register_file_name((gl_register_file)dst->File));
- return vgrf(glsl_type::vec4_type);
- }
-}
-
-fs_reg
-fs_visitor::get_fp_src_reg(const prog_src_register *src)
-{
- struct gl_program_parameter_list *plist = prog->Parameters;
-
- fs_reg result;
-
- assert(!src->Abs);
-
- switch (src->File) {
- case PROGRAM_UNDEFINED:
- return fs_reg();
- case PROGRAM_TEMPORARY:
- result = fp_temp_regs[src->Index];
- break;
-
- case PROGRAM_INPUT:
- result = fp_input_regs[src->Index];
- break;
-
- case PROGRAM_STATE_VAR:
- case PROGRAM_UNIFORM:
- case PROGRAM_CONSTANT:
- /* We actually want to look at the type in the Parameters list for this,
- * because this lets us upload constant builtin uniforms, as actual
- * constants.
- */
- switch (plist->Parameters[src->Index].Type) {
- case PROGRAM_CONSTANT: {
- result = vgrf(glsl_type::vec4_type);
-
- for (int i = 0; i < 4; i++) {
- emit(MOV(offset(result, i),
- fs_reg(plist->ParameterValues[src->Index][i].f)));
- }
- break;
- }
-
- case PROGRAM_STATE_VAR:
- case PROGRAM_UNIFORM:
- result = fs_reg(UNIFORM, src->Index * 4);
- break;
-
- default:
- _mesa_problem(ctx, "bad uniform src register file: %s\n",
- _mesa_register_file_name((gl_register_file)src->File));
- return vgrf(glsl_type::vec4_type);
- }
- break;
-
- default:
- _mesa_problem(ctx, "bad src register file: %s\n",
- _mesa_register_file_name((gl_register_file)src->File));
- return vgrf(glsl_type::vec4_type);
- }
-
- if (src->Swizzle != SWIZZLE_NOOP || src->Negate) {
- fs_reg unswizzled = result;
- result = vgrf(glsl_type::vec4_type);
- for (int i = 0; i < 4; i++) {
- bool negate = src->Negate & (1 << i);
- /* The ZERO, ONE, and Negate options are only used for OPCODE_SWZ,
- * but it costs us nothing to support it.
- */
- int src_swiz = GET_SWZ(src->Swizzle, i);
- if (src_swiz == SWIZZLE_ZERO) {
- emit(MOV(offset(result, i), fs_reg(0.0f)));
- } else if (src_swiz == SWIZZLE_ONE) {
- emit(MOV(offset(result, i),
- negate ? fs_reg(-1.0f) : fs_reg(1.0f)));
- } else {
- fs_reg src = offset(unswizzled, src_swiz);
- if (negate)
- src.negate = !src.negate;
- emit(MOV(offset(result, i), src));
- }
- }
- }
-
- return result;
-}
projects / mesa.git / commitdiff