src/tint/lang/hlsl/writer/builtin_test.cc

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#include "src/tint/lang/core/fluent_types.h"
#include "src/tint/lang/core/ir/function.h"
#include "src/tint/lang/core/number.h"
#include "src/tint/lang/hlsl/writer/helper_test.h"

#include "gtest/gtest.h"

using namespace tint::core::fluent_types;     // NOLINT
using namespace tint::core::number_suffixes;  // NOLINT

namespace tint::hlsl::writer {
namespace {

TEST_F(HlslWriterTest, BuiltinSelectScalar) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {
        auto* x = b.Let("x", 1_i);
        auto* y = b.Let("y", 2_i);

        auto* c = b.Call(ty.i32(), core::BuiltinFn::kSelect, x, y, true);
        b.Let("w", c);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.hlsl;
    EXPECT_EQ(output_.hlsl, R"(
void foo() {
  int x = 1;
  int y = 2;
  int w = ((true) ? (y) : (x));
}

)");
}

TEST_F(HlslWriterTest, BuiltinSelectVector) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {
        auto* x = b.Let("x", b.Construct<vec2<i32>>(1_i, 2_i));
        auto* y = b.Let("y", b.Construct<vec2<i32>>(3_i, 4_i));
        auto* cmp = b.Construct<vec2<bool>>(true, false);

        auto* c = b.Call(ty.vec2<i32>(), core::BuiltinFn::kSelect, x, y, cmp);
        b.Let("w", c);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.hlsl;
    EXPECT_EQ(output_.hlsl, R"(
void foo() {
  int2 x = int2(1, 2);
  int2 y = int2(3, 4);
  int2 w = ((bool2(true, false)) ? (y) : (x));
}

)");
}

TEST_F(HlslWriterTest, BuiltinTrunc) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {
        auto* val = b.Var("v", b.Zero(ty.f32()));

        auto* v = b.Load(val);
        auto* t = b.Call(ty.f32(), core::BuiltinFn::kTrunc, v);

        b.Let("val", t);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.hlsl;
    EXPECT_EQ(output_.hlsl, R"(
void foo() {
  float v = 0.0f;
  float v_1 = v;
  float v_2 = floor(v_1);
  float val = (((v_1 < 0.0f)) ? (ceil(v_1)) : (v_2));
}

)");
}

TEST_F(HlslWriterTest, BuiltinTruncVec) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {
        auto* val = b.Var("v", b.Splat(ty.vec3<f32>(), 2_f));

        auto* v = b.Load(val);
        auto* t = b.Call(ty.vec3<f32>(), core::BuiltinFn::kTrunc, v);

        b.Let("val", t);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.hlsl;
    EXPECT_EQ(output_.hlsl, R"(
void foo() {
  float3 v = (2.0f).xxx;
  float3 v_1 = v;
  float3 v_2 = floor(v_1);
  float3 val = (((v_1 < (0.0f).xxx)) ? (ceil(v_1)) : (v_2));
}

)");
}

TEST_F(HlslWriterTest, BuiltinTruncF16) {
    auto* func = b.Function("foo", ty.void_(), core::ir::Function::PipelineStage::kFragment);
    b.Append(func->Block(), [&] {
        auto* val = b.Var("v", b.Zero(ty.f16()));

        auto* v = b.Load(val);
        auto* t = b.Call(ty.f16(), core::BuiltinFn::kTrunc, v);

        b.Let("val", t);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << err_ << output_.hlsl;
    EXPECT_EQ(output_.hlsl, R"(
void foo() {
  float16_t v = float16_t(0.0h);
  float16_t v_1 = v;
  float16_t v_2 = floor(v_1);
  float16_t val = (((v_1 < float16_t(0.0h))) ? (ceil(v_1)) : (v_2));
}

)");
}

}  // namespace
}  // namespace tint::hlsl::writer