--- /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"
+
+class cmod_propagation_test : public ::testing::Test {
+ virtual void SetUp();
+
+public:
+ struct brw_context *brw;
+ 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 cmod_propagation_fs_visitor : public fs_visitor
+{
+public:
+ cmod_propagation_fs_visitor(struct brw_context *brw,
+ struct brw_wm_prog_data *prog_data,
+ struct gl_shader_program *shader_prog)
+ : fs_visitor(brw, NULL, NULL, prog_data, shader_prog, NULL, 8) {}
+};
+
+
+void cmod_propagation_test::SetUp()
+{
+ brw = (struct brw_context *)calloc(1, sizeof(*brw));
+ 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 cmod_propagation_fs_visitor(brw, prog_data, shader_prog);
+
+ _mesa_init_fragment_program(ctx, &fp->program, GL_FRAGMENT_SHADER, 0);
+
+ brw->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
+cmod_propagation(fs_visitor *v)
+{
+ const bool print = false;
+
+ if (print) {
+ fprintf(stderr, "= Before =\n");
+ v->cfg->dump(v);
+ }
+
+ bool ret = v->opt_cmod_propagation();
+
+ if (print) {
+ fprintf(stderr, "\n= After =\n");
+ v->cfg->dump(v);
+ }
+
+ return ret;
+}
+
+TEST_F(cmod_propagation_test, basic)
+{
+ fs_reg dest = 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 zero(0.0f);
+ v->emit(BRW_OPCODE_ADD, dest, src0, src1);
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, dest, zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: add(8) dest src0 src1
+ * 1: cmp.ge.f0(8) null dest 0.0f
+ *
+ * = After =
+ * 0: add.ge.f0(8) dest src0 src1
+ */
+
+ v->calculate_cfg();
+ bblock_t *block0 = v->cfg->blocks[0];
+
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(1, block0->end_ip);
+
+ EXPECT_TRUE(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(0, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 0)->conditional_mod);
+}
+
+TEST_F(cmod_propagation_test, cmp_nonzero)
+{
+ fs_reg dest = 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 nonzero(1.0f);
+ v->emit(BRW_OPCODE_ADD, dest, src0, src1);
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, dest, nonzero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: add(8) dest src0 src1
+ * 1: cmp.ge.f0(8) null dest 1.0f
+ *
+ * = 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(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(1, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 1)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 1)->conditional_mod);
+}
+
+TEST_F(cmod_propagation_test, non_cmod_instruction)
+{
+ fs_reg dest = v->vgrf(glsl_type::uint_type);
+ fs_reg src0 = v->vgrf(glsl_type::uint_type);
+ fs_reg zero(0u);
+ v->emit(BRW_OPCODE_FBL, dest, src0);
+ v->emit(BRW_OPCODE_CMP, v->reg_null_ud, dest, zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: fbl(8) dest src0
+ * 1: cmp.ge.f0(8) null dest 0u
+ *
+ * = 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(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(1, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_FBL, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 1)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 1)->conditional_mod);
+}
+
+TEST_F(cmod_propagation_test, intervening_flag_write)
+{
+ fs_reg dest = 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::float_type);
+ fs_reg zero(0.0f);
+ v->emit(BRW_OPCODE_ADD, dest, src0, src1);
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, src2, zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, dest, zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: add(8) dest src0 src1
+ * 1: cmp.ge.f0(8) null src2 0.0f
+ * 2: cmp.ge.f0(8) null dest 0.0f
+ *
+ * = 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(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(2, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 1)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 1)->conditional_mod);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 2)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 2)->conditional_mod);
+}
+
+TEST_F(cmod_propagation_test, intervening_flag_read)
+{
+ fs_reg dest0 = v->vgrf(glsl_type::float_type);
+ fs_reg dest1 = 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::float_type);
+ fs_reg zero(0.0f);
+ v->emit(BRW_OPCODE_ADD, dest0, src0, src1);
+ v->emit(BRW_OPCODE_SEL, dest1, src2, zero)
+ ->predicate = BRW_PREDICATE_NORMAL;
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, dest0, zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: add(8) dest0 src0 src1
+ * 1: (+f0) sel(8) dest1 src2 0.0f
+ * 2: cmp.ge.f0(8) null dest0 0.0f
+ *
+ * = 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(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(2, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_OPCODE_SEL, instruction(block0, 1)->opcode);
+ EXPECT_EQ(BRW_PREDICATE_NORMAL, instruction(block0, 1)->predicate);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 2)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 2)->conditional_mod);
+}
+
+TEST_F(cmod_propagation_test, intervening_dest_write)
+{
+ fs_reg dest = v->vgrf(glsl_type::vec4_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);
+ fs_reg zero(0.0f);
+ v->emit(BRW_OPCODE_ADD, offset(dest, 2), src0, src1);
+ v->emit(SHADER_OPCODE_TEX, dest, src2)
+ ->regs_written = 4;
+ v->emit(BRW_OPCODE_CMP, v->reg_null_f, offset(dest, 2), zero)
+ ->conditional_mod = BRW_CONDITIONAL_GE;
+
+ /* = Before =
+ *
+ * 0: add(8) dest+2 src0 src1
+ * 1: tex(8) rlen 4 dest+0 src2
+ * 2: cmp.ge.f0(8) null dest+2 0.0f
+ *
+ * = 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(cmod_propagation(v));
+ EXPECT_EQ(0, block0->start_ip);
+ EXPECT_EQ(2, block0->end_ip);
+ EXPECT_EQ(BRW_OPCODE_ADD, instruction(block0, 0)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_NONE, instruction(block0, 0)->conditional_mod);
+ EXPECT_EQ(SHADER_OPCODE_TEX, instruction(block0, 1)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_NONE, instruction(block0, 0)->conditional_mod);
+ EXPECT_EQ(BRW_OPCODE_CMP, instruction(block0, 2)->opcode);
+ EXPECT_EQ(BRW_CONDITIONAL_GE, instruction(block0, 2)->conditional_mod);
+}
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