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| /* |
| * Copyright © 2015 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. |
| */ |
| |
| #include <gtest/gtest.h> |
| #include "brw_fs.h" |
| #include "brw_cfg.h" |
| #include "program/program.h" |
| |
| class saturate_propagation_test : public ::testing::Test { |
| virtual void SetUp(); |
| |
| public: |
| struct brw_context *brw; |
| struct brw_device_info *devinfo; |
| struct gl_context *ctx; |
| struct brw_wm_prog_data *prog_data; |
| struct gl_shader_program *shader_prog; |
| struct brw_fragment_program *fp; |
| fs_visitor *v; |
| }; |
| |
| class saturate_propagation_fs_visitor : public fs_visitor |
| { |
| public: |
| saturate_propagation_fs_visitor(struct brw_context *brw, |
| struct brw_wm_prog_data *prog_data, |
| struct gl_shader_program *shader_prog) |
| : fs_visitor(brw, NULL, MESA_SHADER_FRAGMENT, NULL, &prog_data->base, |
| shader_prog, (struct gl_program *) NULL, 8) {} |
| }; |
| |
| |
| void saturate_propagation_test::SetUp() |
| { |
| brw = (struct brw_context *)calloc(1, sizeof(*brw)); |
| devinfo = (struct brw_device_info *)calloc(1, sizeof(*brw)); |
| brw->intelScreen = (struct intel_screen *)calloc(1, sizeof(*brw->intelScreen)); |
| brw->intelScreen->devinfo = devinfo; |
| ctx = &brw->ctx; |
| |
| fp = ralloc(NULL, struct brw_fragment_program); |
| prog_data = ralloc(NULL, struct brw_wm_prog_data); |
| shader_prog = ralloc(NULL, struct gl_shader_program); |
| |
| v = new saturate_propagation_fs_visitor(brw, prog_data, shader_prog); |
| |
| _mesa_init_fragment_program(ctx, &fp->program, GL_FRAGMENT_SHADER, 0); |
| |
| brw->gen = devinfo->gen = 4; |
| } |
| |
| static fs_inst * |
| instruction(bblock_t *block, int num) |
| { |
| fs_inst *inst = (fs_inst *)block->start(); |
| for (int i = 0; i < num; i++) { |
| inst = (fs_inst *)inst->next; |
| } |
| return inst; |
| } |
| |
| static bool |
| saturate_propagation(fs_visitor *v) |
| { |
| const bool print = false; |
| |
| if (print) { |
| fprintf(stderr, "= Before =\n"); |
| v->cfg->dump(v); |
| } |
| |
| bool ret = v->opt_saturate_propagation(); |
| |
| if (print) { |
| fprintf(stderr, "\n= After =\n"); |
| v->cfg->dump(v); |
| } |
| |
| return ret; |
| } |
| |
| TEST_F(saturate_propagation_test, basic) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1); |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 dst0 |
| * |
| * = After = |
| * 0: add.sat(8) dst0 src0 src1 |
| * 1: mov(8) dst1 dst0 |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| |
| EXPECT_TRUE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_TRUE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_FALSE(instruction(block0, 1)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, other_non_saturated_use) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg dst2 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1); |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| v->emit(BRW_OPCODE_ADD, dst2, dst0, src0); |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 dst0 |
| * 2: add(8) dst2 dst0 src0 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_TRUE(instruction(block0, 1)->saturate); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 2)->opcode); |
| } |
| |
| TEST_F(saturate_propagation_test, predicated_instruction) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1) |
| ->predicate = BRW_PREDICATE_NORMAL; |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: (+f0) add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 dst0 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_TRUE(instruction(block0, 1)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, neg_mov_sat) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1); |
| dst0.negate = true; |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 -dst0 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_TRUE(instruction(block0, 1)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, abs_mov_sat) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1); |
| dst0.abs = true; |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 (abs)dst0 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(1, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_TRUE(instruction(block0, 1)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, producer_saturates) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg dst2 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1) |
| ->saturate = true; |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| v->emit(BRW_OPCODE_MOV, dst2, dst0); |
| |
| /* = Before = |
| * |
| * 0: add.sat(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 dst0 |
| * 2: mov(8) dst2 dst0 |
| * |
| * = After = |
| * 0: add.sat(8) dst0 src0 src1 |
| * 1: mov(8) dst1 dst0 |
| * 2: mov(8) dst2 dst0 |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| |
| EXPECT_TRUE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_TRUE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_FALSE(instruction(block0, 1)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, intervening_saturating_copy) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg dst2 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_ADD, dst0, src0, src1); |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| v->emit(BRW_OPCODE_MOV, dst2, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 dst0 |
| * 2: mov.sat(8) dst2 dst0 |
| * |
| * = After = |
| * 0: add.sat(8) dst0 src0 src1 |
| * 1: mov(8) dst1 dst0 |
| * 2: mov(8) dst2 dst0 |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| |
| EXPECT_TRUE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_TRUE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_FALSE(instruction(block0, 1)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 2)->opcode); |
| EXPECT_FALSE(instruction(block0, 2)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, intervening_dest_write) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::vec4_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| fs_reg src2 = v->vgrf(glsl_type::vec2_type); |
| v->emit(BRW_OPCODE_ADD, offset(dst0, 2), src0, src1); |
| v->emit(SHADER_OPCODE_TEX, dst0, src2) |
| ->regs_written = 4; |
| v->emit(BRW_OPCODE_MOV, dst1, offset(dst0, 2)) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: add(8) dst0+2 src0 src1 |
| * 1: tex(8) rlen 4 dst0+0 src2 |
| * 2: mov.sat(8) dst1 dst0+2 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(SHADER_OPCODE_TEX, instruction(block0, 1)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 2)->opcode); |
| EXPECT_TRUE(instruction(block0, 2)->saturate); |
| } |
| |
| TEST_F(saturate_propagation_test, mul_neg_mov_sat_mov_sat) |
| { |
| fs_reg dst0 = v->vgrf(glsl_type::float_type); |
| fs_reg dst1 = v->vgrf(glsl_type::float_type); |
| fs_reg dst2 = v->vgrf(glsl_type::float_type); |
| fs_reg src0 = v->vgrf(glsl_type::float_type); |
| fs_reg src1 = v->vgrf(glsl_type::float_type); |
| v->emit(BRW_OPCODE_MUL, dst0, src0, src1); |
| dst0.negate = true; |
| v->emit(BRW_OPCODE_MOV, dst1, dst0) |
| ->saturate = true; |
| dst0.negate = false; |
| v->emit(BRW_OPCODE_MOV, dst2, dst0) |
| ->saturate = true; |
| |
| /* = Before = |
| * |
| * 0: mul(8) dst0 src0 src1 |
| * 1: mov.sat(8) dst1 -dst0 |
| * 2: mov.sat(8) dst2 dst0 |
| * |
| * = After = |
| * (no changes) |
| */ |
| |
| v->calculate_cfg(); |
| bblock_t *block0 = v->cfg->blocks[0]; |
| |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| |
| EXPECT_FALSE(saturate_propagation(v)); |
| EXPECT_EQ(0, block0->start_ip); |
| EXPECT_EQ(2, block0->end_ip); |
| EXPECT_EQ(BRW_OPCODE_MUL, instruction(block0, 0)->opcode); |
| EXPECT_FALSE(instruction(block0, 0)->saturate); |
| EXPECT_FALSE(instruction(block0, 0)->src[1].negate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode); |
| EXPECT_TRUE(instruction(block0, 1)->saturate); |
| EXPECT_TRUE(instruction(block0, 1)->src[0].negate); |
| EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 2)->opcode); |
| EXPECT_TRUE(instruction(block0, 2)->saturate); |
| } |