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tests: fix shader_jit_compiler and add pica_float

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The Uniform Read and Address Register Offset ran into precision
differences between f32 and f24, which can be easily fixed and
are not the point of the tests.
As for the LG2 and EX2 tests that were failing, they were wrong.
While it is true that 2^79.7 ~= 1e24, the value is bigger than the
biggest representable value in f24, therefore both EX2 and LG2(?)
should result in Inf.
This commit is contained in:
Vitor Kiguchi 2024-01-23 00:56:57 -03:00
parent d2af98673a
commit 5a9bb045d7
3 changed files with 37 additions and 4 deletions
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1
src/tests/CMakeLists.txt
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@ -13,6 +13,7 @@ add_executable(tests
audio_core/audio_fixures.h
audio_core/decoder_tests.cpp
video_core/shader/shader_jit_compiler.cpp
video_core/pica_float.cpp
audio_core/merryhime_3ds_audio/merry_audio/merry_audio.cpp
audio_core/merryhime_3ds_audio/merry_audio/merry_audio.h
audio_core/merryhime_3ds_audio/merry_audio/service_fixture.cpp

30
src/tests/video_core/pica_float.cpp Normal file
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@ -0,0 +1,30 @@
// Copyright 2024 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cmath>
#include <catch2/catch_approx.hpp>
#include <catch2/catch_test_macros.hpp>
#include "video_core/pica_types.h"
using Pica::f24;
TEST_CASE("Infinities", "[video_core][pica_float]") {
REQUIRE(std::isinf(f24::FromFloat32(INFINITY).ToFloat32()));
REQUIRE(std::isinf(f24::FromFloat32(1.e20f).ToFloat32()));
REQUIRE(std::isinf(f24::FromFloat32(-1.e20f).ToFloat32()));
}
TEST_CASE("Subnormals", "[video_core][pica_float]") {
REQUIRE(f24::FromFloat32(1e-20f).ToFloat32() == 0.f);
}
TEST_CASE("NaN", "[video_core][pica_float]") {
const auto inf = f24::FromFloat32(INFINITY);
const auto nan = f24::FromFloat32(NAN);
REQUIRE(std::isnan(nan.ToFloat32()));
REQUIRE(std::isnan((nan * f24::Zero()).ToFloat32()));
REQUIRE(std::isnan((inf - inf).ToFloat32()));
REQUIRE((inf * f24::Zero()).ToFloat32() == 0.f);
}

10
src/tests/video_core/shader/shader_jit_compiler.cpp
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@ -260,7 +260,7 @@ TEST_CASE("LG2", "[video_core][shader][shader_jit]") {
REQUIRE(std::isinf(shader.Run(0.f).x));
REQUIRE(shader.Run(4.f).x == Catch::Approx(2.f));
REQUIRE(shader.Run(64.f).x == Catch::Approx(6.f));
REQUIRE(shader.Run(1.e24f).x == Catch::Approx(79.7262742773f));
// REQUIRE(std::isinf(shader.Run(INFINITY).x));
}
TEST_CASE("EX2", "[video_core][shader][shader_jit]") {
@ -277,8 +277,9 @@ TEST_CASE("EX2", "[video_core][shader][shader_jit]") {
REQUIRE(shader.Run(0.f).x == Catch::Approx(1.f));
REQUIRE(shader.Run(2.f).x == Catch::Approx(4.f));
REQUIRE(shader.Run(6.f).x == Catch::Approx(64.f));
REQUIRE(shader.Run(79.7262742773f).x == Catch::Approx(1.e24f));
REQUIRE(std::isinf(shader.Run(800.f).x));
// If we respect f24 precision, 2^79 = inf, as 79 > 63
// REQUIRE(std::isinf(shader.Run(79.7262742773f).x));
}
TEST_CASE("MUL", "[video_core][shader][shader_jit]") {
@ -469,7 +470,7 @@ TEST_CASE("Uniform Read", "[video_core][shader][shader_jit]") {
const float color = (i * 2.0f) / 255.0f;
const auto color_f24 = Pica::f24::FromFloat32(color);
shader.shader_setup->uniforms.f[i] = {color_f24, color_f24, color_f24, Pica::f24::One()};
f_uniforms[i] = {color, color, color, 1.0f};
f_uniforms[i] = {color_f24.ToFloat32(), color_f24.ToFloat32(), color_f24.ToFloat32(), 1.0f};
}
for (u32 i = 0; i < 96; ++i) {
@ -506,7 +507,8 @@ TEST_CASE("Address Register Offset", "[video_core][shader][shader_jit]") {
const auto color_f24 = Pica::f24::FromFloat32(color);
shader.shader_setup->uniforms.f[i] = {color_f24, color_f24, color_f24,
Pica::f24::One()};
f_uniforms[i] = {color, color, color, 1.f};
f_uniforms[i] = {color_f24.ToFloat32(), color_f24.ToFloat32(), color_f24.ToFloat32(),
1.f};
} else if (i >= 0x60 && i < 0x64) {
const u8 color = static_cast<u8>((i - 0x60) * 0x10);
shader.shader_setup->uniforms.i[i - 0x60] = {color, color, color, 255};