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Shader jit: Save and restore LOOPCOUNT_REG for nested loops,

Browse source 
also add the assert back for nested loops
update test
This commit is contained in:
SachinVin 2022-05-14 17:08:38 +05:30
parent 047e238d09
commit 65611e5b51
2 changed files with 37 additions and 85 deletions
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110
src/tests/video_core/shader/shader_jit_x64_compiler.cpp
View file

@ -108,11 +108,9 @@ TEST_CASE("Nested Loop", "[video_core][shader][shader_jit]") {
const auto sh_temp = SourceRegister::MakeTemporary(0);
const auto sh_output = DestRegister::MakeOutput(0);
std::array<Common::Vec4<u8>, 2> loop_parms{Common::Vec4<u8>{4, 0, 1, 0},
Common::Vec4<u8>{4, 0, 1, 0}};
auto shader_test = ShaderTest({
// clang-format off
{OpCode::Id::MOV, sh_temp, sh_input},
{OpCode::Id::LOOP, 0},
{OpCode::Id::LOOP, 1},
{OpCode::Id::ADD, sh_temp, sh_temp, sh_input},
@ -123,87 +121,39 @@ TEST_CASE("Nested Loop", "[video_core][shader][shader_jit]") {
// clang-format on
});
shader_test.shader_setup->uniforms.i[0] = loop_parms[0];
shader_test.shader_setup->uniforms.i[1] = loop_parms[0];
const auto run_test_helper = [&shader_test](float input) {
Pica::Shader::UnitState shader_unit_jit;
Pica::Shader::UnitState shader_unit_inter;
shader_test.RunJit(shader_unit_jit, input);
shader_test.RunInterpreter(shader_unit_inter, input);
REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() ==
Approx(shader_unit_inter.registers.output[0].x.ToFloat32()));
REQUIRE(shader_unit_jit.address_registers[2] == shader_unit_inter.address_registers[2]);
};
{
// Sanity check
shader_test.shader_setup->uniforms.i[0] = {4, 0, 1, 0};
shader_test.shader_setup->uniforms.i[1] = {4, 0, 1, 0};
Common::Vec4<u8> loop_parms{shader_test.shader_setup->uniforms.i[0]};
const int expected_aL = loop_parms[1] + ((loop_parms[0] + 1) * loop_parms[2]);
const float input = 1.0f;
const float expected_out = (((shader_test.shader_setup->uniforms.i[0][0] + 1) *
(shader_test.shader_setup->uniforms.i[1][0] + 1)) *
input) +
input;
Pica::Shader::UnitState shader_unit_jit;
shader_test.RunJit(shader_unit_jit, 1.0f);
REQUIRE(shader_unit_jit.address_registers[2] == 6);
REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == Approx(25.0f));
Pica::Shader::UnitState shader_unit_inter;
shader_test.RunInterpreter(shader_unit_inter, 2.0f);
REQUIRE(shader_unit_inter.address_registers[2] == 6);
REQUIRE(shader_unit_inter.registers.output[0].x.ToFloat32() == Approx(50.0f));
}
run_test_helper(-5.f);
run_test_helper(0.f);
run_test_helper(2.f);
run_test_helper(6.f);
run_test_helper(79.7262742773f);
}
TEST_CASE("Nested Loop Randomized", "[video_core][shader][shader_jit]") {
const auto sh_input = SourceRegister::MakeInput(0);
const auto sh_temp = SourceRegister::MakeTemporary(0);
const auto sh_output = DestRegister::MakeOutput(0);
auto shader_test = ShaderTest({
// clang-format off
{OpCode::Id::LOOP, 0},
{OpCode::Id::LOOP, 1},
{OpCode::Id::LOOP, 2},
{OpCode::Id::LOOP, 3},
{OpCode::Id::ADD, sh_temp, sh_temp, sh_input},
{Type::EndLoop},
{Type::EndLoop},
{Type::EndLoop},
{Type::EndLoop},
{OpCode::Id::MOV, sh_output, sh_temp},
{OpCode::Id::END},
// clang-format on
});
const auto generate_loop_parms = [] {
u8 iterations = 1 + rand();
u8 initial = 1 + rand();
u8 increment = 1 + rand();
Common::Vec4<u8> loop_parm{iterations, initial, increment, 0};
return Common::Vec4<u8>{iterations, initial, increment, 0};
};
const auto run_test_helper = [&shader_test](float input) {
Pica::Shader::UnitState shader_unit_jit;
Pica::Shader::UnitState shader_unit_inter;
shader_test.RunJit(shader_unit_jit, input);
shader_test.RunInterpreter(shader_unit_inter, input);
REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() ==
Approx(shader_unit_inter.registers.output[0].x.ToFloat32()));
REQUIRE(shader_unit_jit.address_registers[2] == shader_unit_inter.address_registers[2]);
};
REQUIRE(shader_unit_jit.address_registers[2] == expected_aL);
REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == Approx(expected_out));
}
{
shader_test.shader_setup->uniforms.i[0] = {9, 0, 2, 0};
shader_test.shader_setup->uniforms.i[1] = {7, 0, 1, 0};
srand(time(0));
for (int i = 0; i < 10; i++) {
shader_test.shader_setup->uniforms.i[0] = generate_loop_parms();
shader_test.shader_setup->uniforms.i[1] = generate_loop_parms();
shader_test.shader_setup->uniforms.i[2] = generate_loop_parms();
shader_test.shader_setup->uniforms.i[3] = generate_loop_parms();
float input = -(RAND_MAX / 2) + rand();
run_test_helper(input);
const Common::Vec4<u8> loop_parms{shader_test.shader_setup->uniforms.i[0]};
const int expected_aL = loop_parms[1] + ((loop_parms[0] + 1) * loop_parms[2]);
const float input = 1.0f;
const float expected_out = (((shader_test.shader_setup->uniforms.i[0][0] + 1) *
(shader_test.shader_setup->uniforms.i[1][0] + 1)) *
input) +
input;
Pica::Shader::UnitState shader_unit_jit;
shader_test.RunJit(shader_unit_jit, input);
REQUIRE(shader_unit_jit.address_registers[2] == expected_aL);
REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == Approx(expected_out));
}
}

12
src/video_core/shader/shader_jit_x64_compiler.cpp
View file

@ -164,8 +164,10 @@ static void LogCritical(const char* msg) {
void JitShader::Compile_Assert(bool condition, const char* msg) {
if (!condition) {
ABI_PushRegistersAndAdjustStack(*this, PersistentCallerSavedRegs(), 0);
mov(ABI_PARAM1, reinterpret_cast<std::size_t>(msg));
CallFarFunction(*this, LogCritical);
ABI_PopRegistersAndAdjustStack(*this, PersistentCallerSavedRegs(), 0);
}
}
@ -725,10 +727,10 @@ void JitShader::Compile_IF(Instruction instr) {
void JitShader::Compile_LOOP(Instruction instr) {
Compile_Assert(instr.flow_control.dest_offset >= program_counter,
"Backwards loops not supported");
Compile_Assert(loop_depth < 1, "Nested loops may not be supported");
if (loop_depth++) {
// LOOPCOUNT_REG is a "global", so we don't save it here.
push(LOOPINC.cvt64());
push(LOOPCOUNT.cvt64());
const auto loop_save_regs = BuildRegSet({LOOPCOUNT_REG, LOOPINC, LOOPCOUNT});
ABI_PushRegistersAndAdjustStack(*this, loop_save_regs, 0);
}
// This decodes the fields from the integer uniform at index instr.flow_control.int_uniform_id.
@ -759,8 +761,8 @@ void JitShader::Compile_LOOP(Instruction instr) {
loop_break_labels.pop_back();
if (--loop_depth) {
pop(LOOPCOUNT.cvt64());
pop(LOOPINC.cvt64());
const auto loop_save_regs = BuildRegSet({LOOPCOUNT_REG, LOOPINC, LOOPCOUNT});
ABI_PopRegistersAndAdjustStack(*this, loop_save_regs, 0);
}
}