--- /dev/null
+/*
+ * 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"
+
+using namespace brw;
+
+class saturate_propagation_test : public ::testing::Test {
+ virtual void SetUp();
+
+public:
+ struct brw_compiler *compiler;
+ struct gen_device_info *devinfo;
+ struct gl_context *ctx;
+ struct brw_wm_prog_data *prog_data;
+ struct gl_shader_program *shader_prog;
+ fs_visitor *v;
+};
+
+class saturate_propagation_fs_visitor : public fs_visitor
+{
+public:
+ saturate_propagation_fs_visitor(struct brw_compiler *compiler,
+ struct brw_wm_prog_data *prog_data,
+ nir_shader *shader)
+ : fs_visitor(compiler, NULL, NULL, NULL,
+ &prog_data->base, (struct gl_program *) NULL,
+ shader, 8, -1) {}
+};
+
+
+void saturate_propagation_test::SetUp()
+{
+ ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
+ compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
+ devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo));
+ compiler->devinfo = devinfo;
+
+ prog_data = ralloc(NULL, struct brw_wm_prog_data);
+ nir_shader *shader =
+ nir_shader_create(NULL, MESA_SHADER_FRAGMENT, NULL, NULL);
+
+ v = new saturate_propagation_fs_visitor(compiler, prog_data, shader);
+
+ 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1);
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1);
+ set_saturate(true, bld.MOV(dst1, dst0));
+ bld.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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1)
+ ->predicate = BRW_PREDICATE_NORMAL;
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.RNDU(dst0, src0);
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = Before =
+ *
+ * 0: rndu(8) dst0 src0
+ * 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_RNDU, 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, add_neg_mov_sat)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1);
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = 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_TRUE(instruction(block0, 0)->src[0].negate);
+ EXPECT_TRUE(instruction(block0, 0)->src[1].negate);
+ EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode);
+ EXPECT_FALSE(instruction(block0, 1)->saturate);
+}
+
+TEST_F(saturate_propagation_test, mul_neg_mov_sat)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.MUL(dst0, src0, src1);
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = Before =
+ *
+ * 0: mul(8) dst0 src0 src1
+ * 1: mov.sat(8) dst1 -dst0
+ *
+ * = After =
+ * 0: mul.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_MUL, instruction(block0, 0)->opcode);
+ EXPECT_TRUE(instruction(block0, 0)->saturate);
+ EXPECT_TRUE(instruction(block0, 0)->src[0].negate);
+ EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 1)->opcode);
+ EXPECT_FALSE(instruction(block0, 1)->saturate);
+ EXPECT_FALSE(instruction(block0, 1)->src[0].negate);
+}
+
+TEST_F(saturate_propagation_test, mul_mov_sat_neg_mov_sat)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.MUL(dst0, src0, src1);
+ set_saturate(true, bld.MOV(dst1, dst0));
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst2, dst0));
+
+ /* = 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_EQ(BRW_OPCODE_MOV, instruction(block0, 2)->opcode);
+ EXPECT_TRUE(instruction(block0, 2)->src[0].negate);
+ EXPECT_TRUE(instruction(block0, 2)->saturate);
+}
+
+TEST_F(saturate_propagation_test, mul_neg_mov_sat_neg_mov_sat)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.MUL(dst0, src0, src1);
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+ set_saturate(true, bld.MOV(dst2, dst0));
+
+ /* = 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)->src[0].negate);
+ EXPECT_TRUE(instruction(block0, 1)->saturate);
+ EXPECT_EQ(BRW_OPCODE_MOV, instruction(block0, 2)->opcode);
+ EXPECT_TRUE(instruction(block0, 2)->src[0].negate);
+ EXPECT_TRUE(instruction(block0, 2)->saturate);
+}
+
+TEST_F(saturate_propagation_test, abs_mov_sat)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1);
+ dst0.abs = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+
+ /* = 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ set_saturate(true, bld.ADD(dst0, src0, src1));
+ set_saturate(true, bld.MOV(dst1, dst0));
+ bld.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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(dst0, src0, src1);
+ set_saturate(true, bld.MOV(dst1, dst0));
+ set_saturate(true, bld.MOV(dst2, dst0));
+
+ /* = 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.ADD(offset(dst0, bld, 2), src0, src1);
+ bld.emit(SHADER_OPCODE_TEX, dst0, src2)
+ ->size_written = 4 * REG_SIZE;
+ set_saturate(true, bld.MOV(dst1, offset(dst0, bld, 2)));
+
+ /* = 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)
+{
+ const fs_builder &bld = v->bld;
+ 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);
+ bld.MUL(dst0, src0, src1);
+ dst0.negate = true;
+ set_saturate(true, bld.MOV(dst1, dst0));
+ dst0.negate = false;
+ set_saturate(true, bld.MOV(dst2, dst0));
+
+ /* = 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);
+}
projects / mesa.git / blobdiff