src/mesa/drivers/dri/i965/test_vec4_register_coalesce.cpp

   1 /*
   2  * Copyright © 2012 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <gtest/gtest.h>
  25 #include "brw_vec4.h"
  26
  27 using namespace brw;
  28
  29 int ret = 0;
  30
  31 #define register_coalesce(v) _register_coalesce(v, __FUNCTION__)
  32
  33 class register_coalesce_test : public ::testing::Test {
  34    virtual void SetUp();
  35
  36 public:
  37    struct brw_context *brw;
  38    struct intel_context *intel;
  39    struct gl_context *ctx;
  40    struct gl_shader_program *shader_prog;
  41    struct brw_vs_compile *c;
  42    vec4_visitor *v;
  43 };
  44
  45 void register_coalesce_test::SetUp()
  46 {
  47    brw = (struct brw_context *)calloc(1, sizeof(*brw));
  48    intel = &brw->intel;
  49    ctx = &intel->ctx;
  50
  51    c = ralloc(NULL, struct brw_vs_compile);
  52    c->vp = ralloc(NULL, struct brw_vertex_program);
  53
  54    shader_prog = ralloc(NULL, struct gl_shader_program);
  55
  56    v = new vec4_visitor(brw, c, shader_prog, NULL, NULL);
  57
  58    _mesa_init_vertex_program(ctx, &c->vp->program, GL_VERTEX_SHADER, 0);
  59
  60    intel->gen = 4;
  61 }
  62
  63 static void
  64 _register_coalesce(vec4_visitor *v, const char *func)
  65 {
  66    bool print = false;
  67
  68    if (print) {
  69       printf("%s: instructions before:\n", func);
  70       v->dump_instructions();
  71    }
  72
  73    v->opt_compute_to_mrf();
  74
  75    if (print) {
  76       printf("%s: instructions after:\n", func);
  77       v->dump_instructions();
  78    }
  79 }
  80
  81 TEST_F(register_coalesce_test, test_easy_success)
  82 {
  83    src_reg something = src_reg(v, glsl_type::float_type);
  84    dst_reg temp = dst_reg(v, glsl_type::float_type);
  85    dst_reg init;
  86
  87    dst_reg m0 = dst_reg(MRF, 0);
  88    m0.writemask = WRITEMASK_X;
  89    m0.type = BRW_REGISTER_TYPE_F;
  90
  91    vec4_instruction *mul = v->emit(v->MUL(temp, something, src_reg(1.0f)));
  92    v->emit(v->MOV(m0, src_reg(temp)));
  93
  94    register_coalesce(v);
  95
  96    EXPECT_EQ(mul->dst.file, MRF);
  97 }
  98
  99
 100 TEST_F(register_coalesce_test, test_multiple_use)
 101 {
 102    src_reg something = src_reg(v, glsl_type::float_type);
 103    dst_reg temp = dst_reg(v, glsl_type::vec4_type);
 104    dst_reg init;
 105
 106    dst_reg m0 = dst_reg(MRF, 0);
 107    m0.writemask = WRITEMASK_X;
 108    m0.type = BRW_REGISTER_TYPE_F;
 109
 110    dst_reg m1 = dst_reg(MRF, 1);
 111    m1.writemask = WRITEMASK_XYZW;
 112    m1.type = BRW_REGISTER_TYPE_F;
 113
 114    src_reg src = src_reg(temp);
 115    vec4_instruction *mul = v->emit(v->MUL(temp, something, src_reg(1.0f)));
 116    src.swizzle = BRW_SWIZZLE_XXXX;
 117    v->emit(v->MOV(m0, src));
 118    src.swizzle = BRW_SWIZZLE_XYZW;
 119    v->emit(v->MOV(m1, src));
 120
 121    register_coalesce(v);
 122
 123    EXPECT_NE(mul->dst.file, MRF);
 124 }