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/*
* 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.
*/
#include <gtest/gtest.h>
#include "brw_vec4.h"
using namespace brw;
int ret = 0;
#define register_coalesce(v) _register_coalesce(v, __FUNCTION__)
class register_coalesce_test : public ::testing::Test {
virtual void SetUp();
public:
struct brw_context *brw;
struct intel_context *intel;
struct gl_context *ctx;
struct gl_shader_program *shader_prog;
struct brw_vertex_program *vp;
vec4_visitor *v;
};
class register_coalesce_vec4_visitor : public vec4_visitor
{
public:
register_coalesce_vec4_visitor(struct brw_context *brw,
struct gl_shader_program *shader_prog)
: vec4_visitor(brw, NULL, NULL, NULL, NULL, shader_prog, NULL, NULL,
false)
{
}
protected:
virtual dst_reg *make_reg_for_system_value(ir_variable *ir)
{
assert(!"Not reached");
return NULL;
}
virtual int setup_attributes(int payload_reg)
{
assert(!"Not reached");
return 0;
}
virtual void emit_prolog()
{
assert(!"Not reached");
}
virtual void emit_program_code()
{
assert(!"Not reached");
}
virtual void emit_thread_end()
{
assert(!"Not reached");
}
virtual void emit_urb_write_header(int mrf)
{
assert(!"Not reached");
}
virtual vec4_instruction *emit_urb_write_opcode(bool complete)
{
assert(!"Not reached");
}
};
void register_coalesce_test::SetUp()
{
brw = (struct brw_context *)calloc(1, sizeof(*brw));
intel = &brw->intel;
ctx = &intel->ctx;
vp = ralloc(NULL, struct brw_vertex_program);
shader_prog = ralloc(NULL, struct gl_shader_program);
v = new register_coalesce_vec4_visitor(brw, shader_prog);
_mesa_init_vertex_program(ctx, &vp->program, GL_VERTEX_SHADER, 0);
brw->gen = 4;
}
static void
_register_coalesce(vec4_visitor *v, const char *func)
{
bool print = false;
if (print) {
printf("%s: instructions before:\n", func);
v->dump_instructions();
}
v->opt_register_coalesce();
if (print) {
printf("%s: instructions after:\n", func);
v->dump_instructions();
}
}
TEST_F(register_coalesce_test, test_compute_to_mrf)
{
src_reg something = src_reg(v, glsl_type::float_type);
dst_reg temp = dst_reg(v, glsl_type::float_type);
dst_reg init;
dst_reg m0 = dst_reg(MRF, 0);
m0.writemask = WRITEMASK_X;
m0.type = BRW_REGISTER_TYPE_F;
vec4_instruction *mul = v->emit(v->MUL(temp, something, src_reg(1.0f)));
v->emit(v->MOV(m0, src_reg(temp)));
register_coalesce(v);
EXPECT_EQ(mul->dst.file, MRF);
}
TEST_F(register_coalesce_test, test_multiple_use)
{
src_reg something = src_reg(v, glsl_type::float_type);
dst_reg temp = dst_reg(v, glsl_type::vec4_type);
dst_reg init;
dst_reg m0 = dst_reg(MRF, 0);
m0.writemask = WRITEMASK_X;
m0.type = BRW_REGISTER_TYPE_F;
dst_reg m1 = dst_reg(MRF, 1);
m1.writemask = WRITEMASK_XYZW;
m1.type = BRW_REGISTER_TYPE_F;
src_reg src = src_reg(temp);
vec4_instruction *mul = v->emit(v->MUL(temp, something, src_reg(1.0f)));
src.swizzle = BRW_SWIZZLE_XXXX;
v->emit(v->MOV(m0, src));
src.swizzle = BRW_SWIZZLE_XYZW;
v->emit(v->MOV(m1, src));
register_coalesce(v);
EXPECT_NE(mul->dst.file, MRF);
}
TEST_F(register_coalesce_test, test_dp4_mrf)
{
src_reg some_src_1 = src_reg(v, glsl_type::vec4_type);
src_reg some_src_2 = src_reg(v, glsl_type::vec4_type);
dst_reg init;
dst_reg m0 = dst_reg(MRF, 0);
m0.writemask = WRITEMASK_Y;
m0.type = BRW_REGISTER_TYPE_F;
dst_reg temp = dst_reg(v, glsl_type::float_type);
vec4_instruction *dp4 = v->emit(v->DP4(temp, some_src_1, some_src_2));
v->emit(v->MOV(m0, src_reg(temp)));
register_coalesce(v);
EXPECT_EQ(dp4->dst.file, MRF);
EXPECT_EQ(dp4->dst.writemask, WRITEMASK_Y);
}
TEST_F(register_coalesce_test, test_dp4_grf)
{
src_reg some_src_1 = src_reg(v, glsl_type::vec4_type);
src_reg some_src_2 = src_reg(v, glsl_type::vec4_type);
dst_reg init;
dst_reg to = dst_reg(v, glsl_type::vec4_type);
dst_reg temp = dst_reg(v, glsl_type::float_type);
vec4_instruction *dp4 = v->emit(v->DP4(temp, some_src_1, some_src_2));
to.writemask = WRITEMASK_Y;
v->emit(v->MOV(to, src_reg(temp)));
/* if we don't do something with the result, the automatic dead code
* elimination will remove all our instructions.
*/
src_reg src = src_reg(to);
src.negate = true;
v->emit(v->MOV(dst_reg(MRF, 0), src));
register_coalesce(v);
EXPECT_EQ(dp4->dst.reg, to.reg);
EXPECT_EQ(dp4->dst.writemask, WRITEMASK_Y);
}
TEST_F(register_coalesce_test, test_channel_mul_grf)
{
src_reg some_src_1 = src_reg(v, glsl_type::vec4_type);
src_reg some_src_2 = src_reg(v, glsl_type::vec4_type);
dst_reg init;
dst_reg to = dst_reg(v, glsl_type::vec4_type);
dst_reg temp = dst_reg(v, glsl_type::float_type);
vec4_instruction *mul = v->emit(v->MUL(temp, some_src_1, some_src_2));
to.writemask = WRITEMASK_Y;
v->emit(v->MOV(to, src_reg(temp)));
/* if we don't do something with the result, the automatic dead code
* elimination will remove all our instructions.
*/
src_reg src = src_reg(to);
src.negate = true;
v->emit(v->MOV(dst_reg(MRF, 0), src));
register_coalesce(v);
/* This path isn't supported yet in the reswizzling code, so we're checking
* that we haven't done anything bad to scalar non-DP[234]s.
*/
EXPECT_NE(mul->dst.reg, to.reg);
}
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