shadPS4/tests/gcn/test_gcn_instructions.cpp

// SPDX-FileCopyrightText: Copyright 2026 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include <cmath>

#include <gtest/gtest.h>

#include "gcn_test_runner.hpp"
#include "instructions.hpp"
#include "translator.hpp"

class GcnTest : public ::testing::Test {
protected:
    void SetUp() override {}

    void TearDown() override {}
};

struct F32x2 {
    float a;
    float b;
};

// Example
// TEST_F(GcnTest, test_name) {
//     // Runner sets the vulkan context
//     auto runner = gcn_test::Runner::instance().value();
//
//     // v_add_f32 v0, v0, v1
//     auto spirv = TranslateToSpirv(VOP2(OpcodeVOP2::V_ADD_F32, VOperand8::V0, SOperand9::V0, VOperand8::V1).Get());
//
//     // run<T> tells how to interpret the result (only 32bit as of now)
//     // the second argument is templated, it can be at most 4 u32s
//     // the data is accessible by the instruction in v0-4 and s0-4 (mirrored)
//     // the result has to be placed in v0
//     auto result = runner->run<float>(spirv, F32x2{1.5f, 6.0f});
//
//     EXPECT_TRUE(result.has_value());
//     EXPECT_EQ(*result, 7.5f);
// }

TEST_F(GcnTest, add_f32) {
    auto runner = gcn_test::Runner::instance().value();

    auto spirv = TranslateToSpirv(VOP2(OpcodeVOP2::V_ADD_F32, VOperand8::V0, SOperand9::V0, VOperand8::V1).Get());
    auto result = runner->run<float>(spirv, F32x2{1.5f, 6.0f});

    EXPECT_TRUE(result.has_value());
    EXPECT_EQ(*result, 7.5f);
}

TEST_F(GcnTest, add_nan) {
    auto runner = gcn_test::Runner::instance().value();

    auto spirv = TranslateToSpirv(VOP2(OpcodeVOP2::V_ADD_F32, VOperand8::V0, SOperand9::V0, VOperand8::V1).Get());
    auto result = runner->run<float>(spirv, F32x2{1.0f, std::numeric_limits<float>::quiet_NaN()});

    EXPECT_TRUE(result.has_value());
    EXPECT_TRUE(std::isnan(*result));
}