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

// Copyright 2023 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "src/tint/lang/spirv/writer/common/helper_test.h"

#include "src/tint/lang/core/function.h"
#include "src/tint/lang/core/type/builtin_structs.h"

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

namespace tint::spirv::writer {
namespace {

/// A parameterized builtin function test case.
struct BuiltinTestCase {
    /// The element type to test.
    TestElementType type;
    /// The builtin function.
    enum core::Function function;
    /// The expected SPIR-V instruction string.
    std::string spirv_inst;
};

// Tests for builtins with the signature: T = func(T)
using Builtin_1arg = SpirvWriterTestWithParam<BuiltinTestCase>;
TEST_P(Builtin_1arg, Scalar) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeScalarType(params.type), params.function, MakeScalarValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
TEST_P(Builtin_1arg, Vector) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeVectorType(params.type), params.function, MakeVectorValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
INSTANTIATE_TEST_SUITE_P(
    SpirvWriterTest,
    Builtin_1arg,
    testing::Values(BuiltinTestCase{kI32, core::Function::kAbs, "SAbs"},
                    BuiltinTestCase{kF32, core::Function::kAbs, "FAbs"},
                    BuiltinTestCase{kF16, core::Function::kAbs, "FAbs"},
                    BuiltinTestCase{kF32, core::Function::kAcos, "Acos"},
                    BuiltinTestCase{kF16, core::Function::kAcos, "Acos"},
                    BuiltinTestCase{kF32, core::Function::kAsinh, "Asinh"},
                    BuiltinTestCase{kF16, core::Function::kAsinh, "Asinh"},
                    BuiltinTestCase{kF32, core::Function::kAcos, "Acos"},
                    BuiltinTestCase{kF16, core::Function::kAcos, "Acos"},
                    BuiltinTestCase{kF32, core::Function::kAsinh, "Asinh"},
                    BuiltinTestCase{kF16, core::Function::kAsinh, "Asinh"},
                    BuiltinTestCase{kF32, core::Function::kAtan, "Atan"},
                    BuiltinTestCase{kF16, core::Function::kAtan, "Atan"},
                    BuiltinTestCase{kF32, core::Function::kAtanh, "Atanh"},
                    BuiltinTestCase{kF16, core::Function::kAtanh, "Atanh"},
                    BuiltinTestCase{kF32, core::Function::kCeil, "Ceil"},
                    BuiltinTestCase{kF16, core::Function::kCeil, "Ceil"},
                    BuiltinTestCase{kF32, core::Function::kCos, "Cos"},
                    BuiltinTestCase{kF16, core::Function::kCos, "Cos"},
                    BuiltinTestCase{kI32, core::Function::kCountOneBits, "OpBitCount"},
                    BuiltinTestCase{kU32, core::Function::kCountOneBits, "OpBitCount"},
                    BuiltinTestCase{kF32, core::Function::kDpdx, "OpDPdx"},
                    BuiltinTestCase{kF32, core::Function::kDpdxCoarse, "OpDPdxCoarse"},
                    BuiltinTestCase{kF32, core::Function::kDpdxFine, "OpDPdxFine"},
                    BuiltinTestCase{kF32, core::Function::kDpdy, "OpDPdy"},
                    BuiltinTestCase{kF32, core::Function::kDpdyCoarse, "OpDPdyCoarse"},
                    BuiltinTestCase{kF32, core::Function::kDpdyFine, "OpDPdyFine"},
                    BuiltinTestCase{kF32, core::Function::kDegrees, "Degrees"},
                    BuiltinTestCase{kF16, core::Function::kDegrees, "Degrees"},
                    BuiltinTestCase{kF32, core::Function::kExp, "Exp"},
                    BuiltinTestCase{kF16, core::Function::kExp, "Exp"},
                    BuiltinTestCase{kF32, core::Function::kExp2, "Exp2"},
                    BuiltinTestCase{kF16, core::Function::kExp2, "Exp2"},
                    BuiltinTestCase{kF32, core::Function::kFloor, "Floor"},
                    BuiltinTestCase{kF16, core::Function::kFloor, "Floor"},
                    BuiltinTestCase{kF32, core::Function::kFract, "Fract"},
                    BuiltinTestCase{kF16, core::Function::kFract, "Fract"},
                    BuiltinTestCase{kF32, core::Function::kFwidth, "OpFwidth"},
                    BuiltinTestCase{kF32, core::Function::kFwidthCoarse, "OpFwidthCoarse"},
                    BuiltinTestCase{kF32, core::Function::kFwidthFine, "OpFwidthFine"},
                    BuiltinTestCase{kF32, core::Function::kInverseSqrt, "InverseSqrt"},
                    BuiltinTestCase{kF16, core::Function::kInverseSqrt, "InverseSqrt"},
                    BuiltinTestCase{kF32, core::Function::kLog, "Log"},
                    BuiltinTestCase{kF16, core::Function::kLog, "Log"},
                    BuiltinTestCase{kF32, core::Function::kLog2, "Log2"},
                    BuiltinTestCase{kF16, core::Function::kLog2, "Log2"},
                    BuiltinTestCase{kF32, core::Function::kQuantizeToF16, "OpQuantizeToF16"},
                    BuiltinTestCase{kF32, core::Function::kRadians, "Radians"},
                    BuiltinTestCase{kF16, core::Function::kRadians, "Radians"},
                    BuiltinTestCase{kI32, core::Function::kReverseBits, "OpBitReverse"},
                    BuiltinTestCase{kU32, core::Function::kReverseBits, "OpBitReverse"},
                    BuiltinTestCase{kF32, core::Function::kRound, "RoundEven"},
                    BuiltinTestCase{kF16, core::Function::kRound, "RoundEven"},
                    BuiltinTestCase{kF32, core::Function::kSign, "FSign"},
                    BuiltinTestCase{kF16, core::Function::kSign, "FSign"},
                    BuiltinTestCase{kI32, core::Function::kSign, "SSign"},
                    BuiltinTestCase{kF32, core::Function::kSin, "Sin"},
                    BuiltinTestCase{kF16, core::Function::kSin, "Sin"},
                    BuiltinTestCase{kF32, core::Function::kSqrt, "Sqrt"},
                    BuiltinTestCase{kF16, core::Function::kSqrt, "Sqrt"},
                    BuiltinTestCase{kF32, core::Function::kTan, "Tan"},
                    BuiltinTestCase{kF16, core::Function::kTan, "Tan"},
                    BuiltinTestCase{kF32, core::Function::kTrunc, "Trunc"},
                    BuiltinTestCase{kF16, core::Function::kTrunc, "Trunc"},
                    BuiltinTestCase{kF32, core::Function::kCosh, "Cosh"},
                    BuiltinTestCase{kF16, core::Function::kCosh, "Cosh"},
                    BuiltinTestCase{kF32, core::Function::kSinh, "Sinh"},
                    BuiltinTestCase{kF16, core::Function::kSinh, "Sinh"},
                    BuiltinTestCase{kF32, core::Function::kTanh, "Tanh"},
                    BuiltinTestCase{kF16, core::Function::kTanh, "Tanh"}));

// Test that abs of an unsigned value just folds away.
TEST_F(SpirvWriterTest, Builtin_Abs_u32) {
    auto* func = b.Function("foo", MakeScalarType(kU32));
    b.Append(func->Block(), [&] {
        auto* arg = MakeScalarValue(kU32);
        auto* result = b.Call(MakeScalarType(kU32), core::Function::kAbs, arg);
        b.Return(func, result);
        mod.SetName(arg, "arg");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
        %foo = OpFunction %uint None %3
          %4 = OpLabel
               OpReturnValue %arg
               OpFunctionEnd
)");
}

TEST_F(SpirvWriterTest, Builtin_Abs_vec2u) {
    auto* func = b.Function("foo", MakeVectorType(kU32));
    b.Append(func->Block(), [&] {
        auto* arg = MakeVectorValue(kU32);
        auto* result = b.Call(MakeVectorType(kU32), core::Function::kAbs, arg);
        b.Return(func, result);
        mod.SetName(arg, "arg");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
        %foo = OpFunction %v2uint None %4
          %5 = OpLabel
               OpReturnValue %arg
               OpFunctionEnd
)");
}

// Test that all of a scalar just folds away.
TEST_F(SpirvWriterTest, Builtin_All_Scalar) {
    auto* arg = b.FunctionParam("arg", ty.bool_());
    auto* func = b.Function("foo", ty.bool_());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.bool_(), core::Function::kAll, arg);
        b.Return(func, result);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("OpReturnValue %arg");
}

TEST_F(SpirvWriterTest, Builtin_All_Vector) {
    auto* arg = b.FunctionParam("arg", ty.vec4<bool>());
    auto* func = b.Function("foo", ty.bool_());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.bool_(), core::Function::kAll, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpAll %bool %arg");
}

// Test that any of a scalar just folds away.
TEST_F(SpirvWriterTest, Builtin_Any_Scalar) {
    auto* arg = b.FunctionParam("arg", ty.bool_());
    auto* func = b.Function("foo", ty.bool_());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.bool_(), core::Function::kAny, arg);
        b.Return(func, result);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("OpReturnValue %arg");
}

TEST_F(SpirvWriterTest, Builtin_Any_Vector) {
    auto* arg = b.FunctionParam("arg", ty.vec4<bool>());
    auto* func = b.Function("foo", ty.bool_());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.bool_(), core::Function::kAny, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpAny %bool %arg");
}

TEST_F(SpirvWriterTest, Builtin_Determinant_Mat4x4f) {
    auto* arg = b.FunctionParam("arg", ty.mat4x4<f32>());
    auto* func = b.Function("foo", ty.f32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f32(), core::Function::kDeterminant, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %float %9 Determinant %arg");
}

TEST_F(SpirvWriterTest, Builtin_Determinant_Mat3x3h) {
    auto* arg = b.FunctionParam("arg", ty.mat3x3<f16>());
    auto* func = b.Function("foo", ty.f16());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f16(), core::Function::kDeterminant, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %half %9 Determinant %arg");
}

TEST_F(SpirvWriterTest, Builtin_Frexp_F32) {
    auto* str = type::CreateFrexpResult(ty, mod.symbols, ty.f32());
    auto* arg = b.FunctionParam("arg", ty.f32());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kFrexp, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__frexp_result_f32 %9 FrexpStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Frexp_F16) {
    auto* str = type::CreateFrexpResult(ty, mod.symbols, ty.f16());
    auto* arg = b.FunctionParam("arg", ty.f16());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kFrexp, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__frexp_result_f16 %9 FrexpStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Frexp_Vec2f) {
    auto* str = type::CreateFrexpResult(ty, mod.symbols, ty.vec2<f32>());
    auto* arg = b.FunctionParam("arg", ty.vec2<f32>());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kFrexp, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__frexp_result_vec2_f32 %11 FrexpStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Frexp_Vec3h) {
    auto* str = type::CreateFrexpResult(ty, mod.symbols, ty.vec3<f16>());
    auto* arg = b.FunctionParam("arg", ty.vec3<f16>());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kFrexp, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__frexp_result_vec3_f16 %11 FrexpStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Length_vec4f) {
    auto* arg = b.FunctionParam("arg", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.f32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f32(), core::Function::kLength, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %float %8 Length %arg");
}

TEST_F(SpirvWriterTest, Builtin_Modf_F32) {
    auto* str = type::CreateModfResult(ty, mod.symbols, ty.f32());
    auto* arg = b.FunctionParam("arg", ty.f32());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kModf, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__modf_result_f32 %8 ModfStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Modf_F16) {
    auto* str = type::CreateModfResult(ty, mod.symbols, ty.f16());
    auto* arg = b.FunctionParam("arg", ty.f16());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kModf, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__modf_result_f16 %8 ModfStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Modf_Vec2f) {
    auto* str = type::CreateModfResult(ty, mod.symbols, ty.vec2<f32>());
    auto* arg = b.FunctionParam("arg", ty.vec2<f32>());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kModf, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__modf_result_vec2_f32 %9 ModfStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Modf_Vec3h) {
    auto* str = type::CreateModfResult(ty, mod.symbols, ty.vec3<f16>());
    auto* arg = b.FunctionParam("arg", ty.vec3<f16>());
    auto* func = b.Function("foo", str);
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(str, core::Function::kModf, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %__modf_result_vec3_f16 %9 ModfStruct %arg");
}

TEST_F(SpirvWriterTest, Builtin_Normalize_vec4f) {
    auto* arg = b.FunctionParam("arg", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kNormalize, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4float %8 Normalize %arg");
}

TEST_F(SpirvWriterTest, Builtin_Transpose_Mat2x3f) {
    auto* arg = b.FunctionParam("arg", ty.mat2x3<f32>());
    auto* func = b.Function("foo", ty.mat3x2<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.mat3x2<f32>(), core::Function::kTranspose, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpTranspose %mat3v2float %arg");
}

TEST_F(SpirvWriterTest, Builtin_Transpose_Mat4x4f) {
    auto* arg = b.FunctionParam("arg", ty.mat4x4<f32>());
    auto* func = b.Function("foo", ty.mat4x4<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.mat4x4<f32>(), core::Function::kTranspose, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpTranspose %mat4v4float %arg");
}

TEST_F(SpirvWriterTest, Builtin_Transpose_Mat4x3h) {
    auto* arg = b.FunctionParam("arg", ty.mat4x3<f16>());
    auto* func = b.Function("foo", ty.mat3x4<f16>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.mat3x4<f16>(), core::Function::kTranspose, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpTranspose %mat3v4half %arg");
}

TEST_F(SpirvWriterTest, Builtin_Transpose_Mat2x2h) {
    auto* arg = b.FunctionParam("arg", ty.mat2x2<f16>());
    auto* func = b.Function("foo", ty.mat2x2<f16>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.mat2x2<f16>(), core::Function::kTranspose, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpTranspose %mat2v2half %arg");
}

TEST_F(SpirvWriterTest, Builtin_Pack2X16Float) {
    auto* arg = b.FunctionParam("arg", ty.vec2<f32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kPack2X16Float, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %uint %9 PackHalf2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Pack2X16Snorm) {
    auto* arg = b.FunctionParam("arg", ty.vec2<f32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kPack2X16Snorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %uint %9 PackSnorm2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Pack2X16Unorm) {
    auto* arg = b.FunctionParam("arg", ty.vec2<f32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kPack2X16Unorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %uint %9 PackUnorm2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Pack4X8Snorm) {
    auto* arg = b.FunctionParam("arg", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kPack4X8Snorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %uint %9 PackSnorm4x8 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Pack4X8Unorm) {
    auto* arg = b.FunctionParam("arg", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kPack4X8Unorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %uint %9 PackUnorm4x8 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Unpack2X16Float) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.vec2<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<f32>(), core::Function::kUnpack2X16Float, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v2float %9 UnpackHalf2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Unpack2X16Snorm) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.vec2<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<f32>(), core::Function::kUnpack2X16Snorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v2float %9 UnpackSnorm2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Unpack2X16Unorm) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.vec2<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<f32>(), core::Function::kUnpack2X16Unorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v2float %9 UnpackUnorm2x16 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Unpack4X8Snorm) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kUnpack4X8Snorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4float %9 UnpackSnorm4x8 %arg");
}

TEST_F(SpirvWriterTest, Builtin_Unpack4X8Unorm) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kUnpack4X8Unorm, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4float %9 UnpackUnorm4x8 %arg");
}

TEST_F(SpirvWriterTest, Builtin_CountLeadingZeros_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kCountLeadingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %6 = OpULessThanEqual %bool %arg %uint_65535
          %9 = OpSelect %uint %6 %uint_16 %uint_0
         %12 = OpShiftLeftLogical %uint %arg %9
         %13 = OpULessThanEqual %bool %12 %uint_16777215
         %15 = OpSelect %uint %13 %uint_8 %uint_0
         %17 = OpShiftLeftLogical %uint %12 %15
         %18 = OpULessThanEqual %bool %17 %uint_268435455
         %20 = OpSelect %uint %18 %uint_4 %uint_0
         %22 = OpShiftLeftLogical %uint %17 %20
         %23 = OpULessThanEqual %bool %22 %uint_1073741823
         %25 = OpSelect %uint %23 %uint_2 %uint_0
         %27 = OpShiftLeftLogical %uint %22 %25
         %28 = OpULessThanEqual %bool %27 %uint_2147483647
         %30 = OpSelect %uint %28 %uint_1 %uint_0
         %32 = OpIEqual %bool %27 %uint_0
         %33 = OpSelect %uint %32 %uint_1 %uint_0
         %34 = OpBitwiseOr %uint %30 %33
         %35 = OpBitwiseOr %uint %25 %34
         %36 = OpBitwiseOr %uint %20 %35
         %37 = OpBitwiseOr %uint %15 %36
         %38 = OpBitwiseOr %uint %9 %37
     %result = OpIAdd %uint %38 %33
)");
}

TEST_F(SpirvWriterTest, Builtin_CountLeadingZeros_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kCountLeadingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %7 = OpBitcast %uint %arg
          %8 = OpULessThanEqual %bool %7 %uint_65535
         %11 = OpSelect %uint %8 %uint_16 %uint_0
         %14 = OpShiftLeftLogical %uint %7 %11
         %15 = OpULessThanEqual %bool %14 %uint_16777215
         %17 = OpSelect %uint %15 %uint_8 %uint_0
         %19 = OpShiftLeftLogical %uint %14 %17
         %20 = OpULessThanEqual %bool %19 %uint_268435455
         %22 = OpSelect %uint %20 %uint_4 %uint_0
         %24 = OpShiftLeftLogical %uint %19 %22
         %25 = OpULessThanEqual %bool %24 %uint_1073741823
         %27 = OpSelect %uint %25 %uint_2 %uint_0
         %29 = OpShiftLeftLogical %uint %24 %27
         %30 = OpULessThanEqual %bool %29 %uint_2147483647
         %32 = OpSelect %uint %30 %uint_1 %uint_0
         %34 = OpIEqual %bool %29 %uint_0
         %35 = OpSelect %uint %34 %uint_1 %uint_0
         %36 = OpBitwiseOr %uint %32 %35
         %37 = OpBitwiseOr %uint %27 %36
         %38 = OpBitwiseOr %uint %22 %37
         %39 = OpBitwiseOr %uint %17 %38
         %40 = OpBitwiseOr %uint %11 %39
         %41 = OpIAdd %uint %40 %35
     %result = OpBitcast %int %41
)");
}

TEST_F(SpirvWriterTest, Builtin_CountLeadingZeros_Vec2U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<u32>(), core::Function::kCountLeadingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%8 = OpConstantComposite %v2uint %uint_65535 %uint_65535");
    EXPECT_INST("%13 = OpConstantComposite %v2uint %uint_16 %uint_16");
    EXPECT_INST("%15 = OpConstantComposite %v2uint %uint_0 %uint_0");
    EXPECT_INST("%19 = OpConstantComposite %v2uint %uint_16777215 %uint_16777215");
    EXPECT_INST("%22 = OpConstantComposite %v2uint %uint_8 %uint_8");
    EXPECT_INST("%26 = OpConstantComposite %v2uint %uint_268435455 %uint_268435455");
    EXPECT_INST("%29 = OpConstantComposite %v2uint %uint_4 %uint_4");
    EXPECT_INST("%33 = OpConstantComposite %v2uint %uint_1073741823 %uint_1073741823");
    EXPECT_INST("%36 = OpConstantComposite %v2uint %uint_2 %uint_2");
    EXPECT_INST("%40 = OpConstantComposite %v2uint %uint_2147483647 %uint_2147483647");
    EXPECT_INST("%43 = OpConstantComposite %v2uint %uint_1 %uint_1");
    EXPECT_INST(R"(
          %7 = OpULessThanEqual %v2bool %arg %8
         %12 = OpSelect %v2uint %7 %13 %15
         %17 = OpShiftLeftLogical %v2uint %arg %12
         %18 = OpULessThanEqual %v2bool %17 %19
         %21 = OpSelect %v2uint %18 %22 %15
         %24 = OpShiftLeftLogical %v2uint %17 %21
         %25 = OpULessThanEqual %v2bool %24 %26
         %28 = OpSelect %v2uint %25 %29 %15
         %31 = OpShiftLeftLogical %v2uint %24 %28
         %32 = OpULessThanEqual %v2bool %31 %33
         %35 = OpSelect %v2uint %32 %36 %15
         %38 = OpShiftLeftLogical %v2uint %31 %35
         %39 = OpULessThanEqual %v2bool %38 %40
         %42 = OpSelect %v2uint %39 %43 %15
         %45 = OpIEqual %v2bool %38 %15
         %46 = OpSelect %v2uint %45 %43 %15
         %47 = OpBitwiseOr %v2uint %42 %46
         %48 = OpBitwiseOr %v2uint %35 %47
         %49 = OpBitwiseOr %v2uint %28 %48
         %50 = OpBitwiseOr %v2uint %21 %49
         %51 = OpBitwiseOr %v2uint %12 %50
     %result = OpIAdd %v2uint %51 %46
)");
}

TEST_F(SpirvWriterTest, Builtin_CountTrailingZeros_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kCountTrailingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %6 = OpBitwiseAnd %uint %arg %uint_65535
          %8 = OpIEqual %bool %6 %uint_0
         %11 = OpSelect %uint %8 %uint_16 %uint_0
         %13 = OpShiftRightLogical %uint %arg %11
         %14 = OpBitwiseAnd %uint %13 %uint_255
         %16 = OpIEqual %bool %14 %uint_0
         %17 = OpSelect %uint %16 %uint_8 %uint_0
         %19 = OpShiftRightLogical %uint %13 %17
         %20 = OpBitwiseAnd %uint %19 %uint_15
         %22 = OpIEqual %bool %20 %uint_0
         %23 = OpSelect %uint %22 %uint_4 %uint_0
         %25 = OpShiftRightLogical %uint %19 %23
         %26 = OpBitwiseAnd %uint %25 %uint_3
         %28 = OpIEqual %bool %26 %uint_0
         %29 = OpSelect %uint %28 %uint_2 %uint_0
         %31 = OpShiftRightLogical %uint %25 %29
         %32 = OpBitwiseAnd %uint %31 %uint_1
         %34 = OpIEqual %bool %32 %uint_0
         %35 = OpSelect %uint %34 %uint_1 %uint_0
         %36 = OpIEqual %bool %31 %uint_0
         %37 = OpSelect %uint %36 %uint_1 %uint_0
         %38 = OpBitwiseOr %uint %29 %35
         %39 = OpBitwiseOr %uint %23 %38
         %40 = OpBitwiseOr %uint %17 %39
         %41 = OpBitwiseOr %uint %11 %40
     %result = OpIAdd %uint %41 %37
)");
}

TEST_F(SpirvWriterTest, Builtin_CountTrailingZeros_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kCountTrailingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %7 = OpBitcast %uint %arg
          %8 = OpBitwiseAnd %uint %7 %uint_65535
         %10 = OpIEqual %bool %8 %uint_0
         %13 = OpSelect %uint %10 %uint_16 %uint_0
         %15 = OpShiftRightLogical %uint %7 %13
         %16 = OpBitwiseAnd %uint %15 %uint_255
         %18 = OpIEqual %bool %16 %uint_0
         %19 = OpSelect %uint %18 %uint_8 %uint_0
         %21 = OpShiftRightLogical %uint %15 %19
         %22 = OpBitwiseAnd %uint %21 %uint_15
         %24 = OpIEqual %bool %22 %uint_0
         %25 = OpSelect %uint %24 %uint_4 %uint_0
         %27 = OpShiftRightLogical %uint %21 %25
         %28 = OpBitwiseAnd %uint %27 %uint_3
         %30 = OpIEqual %bool %28 %uint_0
         %31 = OpSelect %uint %30 %uint_2 %uint_0
         %33 = OpShiftRightLogical %uint %27 %31
         %34 = OpBitwiseAnd %uint %33 %uint_1
         %36 = OpIEqual %bool %34 %uint_0
         %37 = OpSelect %uint %36 %uint_1 %uint_0
         %38 = OpIEqual %bool %33 %uint_0
         %39 = OpSelect %uint %38 %uint_1 %uint_0
         %40 = OpBitwiseOr %uint %31 %37
         %41 = OpBitwiseOr %uint %25 %40
         %42 = OpBitwiseOr %uint %19 %41
         %43 = OpBitwiseOr %uint %13 %42
         %44 = OpIAdd %uint %43 %39
     %result = OpBitcast %int %44
)");
}

TEST_F(SpirvWriterTest, Builtin_CountTrailingZeros_Vec2U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<u32>(), core::Function::kCountTrailingZeros, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%8 = OpConstantComposite %v2uint %uint_65535 %uint_65535");
    EXPECT_INST("%11 = OpConstantComposite %v2uint %uint_0 %uint_0");
    EXPECT_INST("%16 = OpConstantComposite %v2uint %uint_16 %uint_16");
    EXPECT_INST("%20 = OpConstantComposite %v2uint %uint_255 %uint_255");
    EXPECT_INST("%24 = OpConstantComposite %v2uint %uint_8 %uint_8");
    EXPECT_INST("%28 = OpConstantComposite %v2uint %uint_15 %uint_15");
    EXPECT_INST("%32 = OpConstantComposite %v2uint %uint_4 %uint_4");
    EXPECT_INST("%36 = OpConstantComposite %v2uint %uint_3 %uint_3");
    EXPECT_INST("%40 = OpConstantComposite %v2uint %uint_2 %uint_2");
    EXPECT_INST("%44 = OpConstantComposite %v2uint %uint_1 %uint_1");
    EXPECT_INST(R"(
          %7 = OpBitwiseAnd %v2uint %arg %8
         %10 = OpIEqual %v2bool %7 %11
         %15 = OpSelect %v2uint %10 %16 %11
         %18 = OpShiftRightLogical %v2uint %arg %15
         %19 = OpBitwiseAnd %v2uint %18 %20
         %22 = OpIEqual %v2bool %19 %11
         %23 = OpSelect %v2uint %22 %24 %11
         %26 = OpShiftRightLogical %v2uint %18 %23
         %27 = OpBitwiseAnd %v2uint %26 %28
         %30 = OpIEqual %v2bool %27 %11
         %31 = OpSelect %v2uint %30 %32 %11
         %34 = OpShiftRightLogical %v2uint %26 %31
         %35 = OpBitwiseAnd %v2uint %34 %36
         %38 = OpIEqual %v2bool %35 %11
         %39 = OpSelect %v2uint %38 %40 %11
         %42 = OpShiftRightLogical %v2uint %34 %39
         %43 = OpBitwiseAnd %v2uint %42 %44
         %46 = OpIEqual %v2bool %43 %11
         %47 = OpSelect %v2uint %46 %44 %11
         %48 = OpIEqual %v2bool %42 %11
         %49 = OpSelect %v2uint %48 %44 %11
         %50 = OpBitwiseOr %v2uint %39 %47
         %51 = OpBitwiseOr %v2uint %31 %50
         %52 = OpBitwiseOr %v2uint %23 %51
         %53 = OpBitwiseOr %v2uint %15 %52
     %result = OpIAdd %v2uint %53 %49
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstLeadingBit_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kFirstLeadingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %6 = OpBitwiseAnd %uint %arg %uint_4294901760
          %8 = OpIEqual %bool %6 %uint_0
         %11 = OpSelect %uint %8 %uint_0 %uint_16
         %13 = OpShiftRightLogical %uint %arg %11
         %14 = OpBitwiseAnd %uint %13 %uint_65280
         %16 = OpIEqual %bool %14 %uint_0
         %17 = OpSelect %uint %16 %uint_0 %uint_8
         %19 = OpShiftRightLogical %uint %13 %17
         %20 = OpBitwiseAnd %uint %19 %uint_240
         %22 = OpIEqual %bool %20 %uint_0
         %23 = OpSelect %uint %22 %uint_0 %uint_4
         %25 = OpShiftRightLogical %uint %19 %23
         %26 = OpBitwiseAnd %uint %25 %uint_12
         %28 = OpIEqual %bool %26 %uint_0
         %29 = OpSelect %uint %28 %uint_0 %uint_2
         %31 = OpShiftRightLogical %uint %25 %29
         %32 = OpBitwiseAnd %uint %31 %uint_2
         %33 = OpIEqual %bool %32 %uint_0
         %34 = OpSelect %uint %33 %uint_0 %uint_1
         %36 = OpBitwiseOr %uint %29 %34
         %37 = OpBitwiseOr %uint %23 %36
         %38 = OpBitwiseOr %uint %17 %37
         %39 = OpBitwiseOr %uint %11 %38
         %40 = OpIEqual %bool %31 %uint_0
     %result = OpSelect %uint %40 %uint_4294967295 %39
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstLeadingBit_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kFirstLeadingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %7 = OpBitcast %uint %arg
          %8 = OpNot %uint %7
          %9 = OpULessThan %bool %7 %uint_2147483648
         %12 = OpSelect %uint %9 %7 %8
         %13 = OpBitwiseAnd %uint %12 %uint_4294901760
         %15 = OpIEqual %bool %13 %uint_0
         %17 = OpSelect %uint %15 %uint_0 %uint_16
         %19 = OpShiftRightLogical %uint %12 %17
         %20 = OpBitwiseAnd %uint %19 %uint_65280
         %22 = OpIEqual %bool %20 %uint_0
         %23 = OpSelect %uint %22 %uint_0 %uint_8
         %25 = OpShiftRightLogical %uint %19 %23
         %26 = OpBitwiseAnd %uint %25 %uint_240
         %28 = OpIEqual %bool %26 %uint_0
         %29 = OpSelect %uint %28 %uint_0 %uint_4
         %31 = OpShiftRightLogical %uint %25 %29
         %32 = OpBitwiseAnd %uint %31 %uint_12
         %34 = OpIEqual %bool %32 %uint_0
         %35 = OpSelect %uint %34 %uint_0 %uint_2
         %37 = OpShiftRightLogical %uint %31 %35
         %38 = OpBitwiseAnd %uint %37 %uint_2
         %39 = OpIEqual %bool %38 %uint_0
         %40 = OpSelect %uint %39 %uint_0 %uint_1
         %42 = OpBitwiseOr %uint %35 %40
         %43 = OpBitwiseOr %uint %29 %42
         %44 = OpBitwiseOr %uint %23 %43
         %45 = OpBitwiseOr %uint %17 %44
         %46 = OpIEqual %bool %37 %uint_0
         %47 = OpSelect %uint %46 %uint_4294967295 %45
     %result = OpBitcast %int %47
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstLeadingBit_Vec2U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<u32>(), core::Function::kFirstLeadingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%8 = OpConstantComposite %v2uint %uint_4294901760 %uint_4294901760");
    EXPECT_INST("%11 = OpConstantComposite %v2uint %uint_0 %uint_0");
    EXPECT_INST("%16 = OpConstantComposite %v2uint %uint_16 %uint_16");
    EXPECT_INST("%20 = OpConstantComposite %v2uint %uint_65280 %uint_65280");
    EXPECT_INST("%24 = OpConstantComposite %v2uint %uint_8 %uint_8");
    EXPECT_INST("%28 = OpConstantComposite %v2uint %uint_240 %uint_240");
    EXPECT_INST("%32 = OpConstantComposite %v2uint %uint_4 %uint_4");
    EXPECT_INST("%36 = OpConstantComposite %v2uint %uint_12 %uint_12");
    EXPECT_INST("%40 = OpConstantComposite %v2uint %uint_2 %uint_2");
    EXPECT_INST("%46 = OpConstantComposite %v2uint %uint_1 %uint_1");
    EXPECT_INST("%54 = OpConstantComposite %v2uint %uint_4294967295 %uint_4294967295");
    EXPECT_INST(R"(
          %7 = OpBitwiseAnd %v2uint %arg %8
         %10 = OpIEqual %v2bool %7 %11
         %15 = OpSelect %v2uint %10 %11 %16
         %18 = OpShiftRightLogical %v2uint %arg %15
         %19 = OpBitwiseAnd %v2uint %18 %20
         %22 = OpIEqual %v2bool %19 %11
         %23 = OpSelect %v2uint %22 %11 %24
         %26 = OpShiftRightLogical %v2uint %18 %23
         %27 = OpBitwiseAnd %v2uint %26 %28
         %30 = OpIEqual %v2bool %27 %11
         %31 = OpSelect %v2uint %30 %11 %32
         %34 = OpShiftRightLogical %v2uint %26 %31
         %35 = OpBitwiseAnd %v2uint %34 %36
         %38 = OpIEqual %v2bool %35 %11
         %39 = OpSelect %v2uint %38 %11 %40
         %42 = OpShiftRightLogical %v2uint %34 %39
         %43 = OpBitwiseAnd %v2uint %42 %40
         %44 = OpIEqual %v2bool %43 %11
         %45 = OpSelect %v2uint %44 %11 %46
         %48 = OpBitwiseOr %v2uint %39 %45
         %49 = OpBitwiseOr %v2uint %31 %48
         %50 = OpBitwiseOr %v2uint %23 %49
         %51 = OpBitwiseOr %v2uint %15 %50
         %52 = OpIEqual %v2bool %42 %11
     %result = OpSelect %v2uint %52 %54 %51
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstTrailingBit_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kFirstTrailingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %6 = OpBitwiseAnd %uint %arg %uint_65535
          %8 = OpIEqual %bool %6 %uint_0
         %11 = OpSelect %uint %8 %uint_16 %uint_0
         %13 = OpShiftRightLogical %uint %arg %11
         %14 = OpBitwiseAnd %uint %13 %uint_255
         %16 = OpIEqual %bool %14 %uint_0
         %17 = OpSelect %uint %16 %uint_8 %uint_0
         %19 = OpShiftRightLogical %uint %13 %17
         %20 = OpBitwiseAnd %uint %19 %uint_15
         %22 = OpIEqual %bool %20 %uint_0
         %23 = OpSelect %uint %22 %uint_4 %uint_0
         %25 = OpShiftRightLogical %uint %19 %23
         %26 = OpBitwiseAnd %uint %25 %uint_3
         %28 = OpIEqual %bool %26 %uint_0
         %29 = OpSelect %uint %28 %uint_2 %uint_0
         %31 = OpShiftRightLogical %uint %25 %29
         %32 = OpBitwiseAnd %uint %31 %uint_1
         %34 = OpIEqual %bool %32 %uint_0
         %35 = OpSelect %uint %34 %uint_1 %uint_0
         %36 = OpBitwiseOr %uint %29 %35
         %37 = OpBitwiseOr %uint %23 %36
         %38 = OpBitwiseOr %uint %17 %37
         %39 = OpBitwiseOr %uint %11 %38
         %40 = OpIEqual %bool %31 %uint_0
     %result = OpSelect %uint %40 %uint_4294967295 %39
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstTrailingBit_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kFirstTrailingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %7 = OpBitcast %uint %arg
          %8 = OpBitwiseAnd %uint %7 %uint_65535
         %10 = OpIEqual %bool %8 %uint_0
         %13 = OpSelect %uint %10 %uint_16 %uint_0
         %15 = OpShiftRightLogical %uint %7 %13
         %16 = OpBitwiseAnd %uint %15 %uint_255
         %18 = OpIEqual %bool %16 %uint_0
         %19 = OpSelect %uint %18 %uint_8 %uint_0
         %21 = OpShiftRightLogical %uint %15 %19
         %22 = OpBitwiseAnd %uint %21 %uint_15
         %24 = OpIEqual %bool %22 %uint_0
         %25 = OpSelect %uint %24 %uint_4 %uint_0
         %27 = OpShiftRightLogical %uint %21 %25
         %28 = OpBitwiseAnd %uint %27 %uint_3
         %30 = OpIEqual %bool %28 %uint_0
         %31 = OpSelect %uint %30 %uint_2 %uint_0
         %33 = OpShiftRightLogical %uint %27 %31
         %34 = OpBitwiseAnd %uint %33 %uint_1
         %36 = OpIEqual %bool %34 %uint_0
         %37 = OpSelect %uint %36 %uint_1 %uint_0
         %38 = OpBitwiseOr %uint %31 %37
         %39 = OpBitwiseOr %uint %25 %38
         %40 = OpBitwiseOr %uint %19 %39
         %41 = OpBitwiseOr %uint %13 %40
         %42 = OpIEqual %bool %33 %uint_0
         %43 = OpSelect %uint %42 %uint_4294967295 %41
     %result = OpBitcast %int %43
)");
}

TEST_F(SpirvWriterTest, Builtin_FirstTrailingBit_Vec2U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<u32>(), core::Function::kFirstTrailingBit, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%8 = OpConstantComposite %v2uint %uint_65535 %uint_65535");
    EXPECT_INST("%11 = OpConstantComposite %v2uint %uint_0 %uint_0");
    EXPECT_INST("%16 = OpConstantComposite %v2uint %uint_16 %uint_16");
    EXPECT_INST("%20 = OpConstantComposite %v2uint %uint_255 %uint_255");
    EXPECT_INST("%24 = OpConstantComposite %v2uint %uint_8 %uint_8");
    EXPECT_INST("%28 = OpConstantComposite %v2uint %uint_15 %uint_15");
    EXPECT_INST("%32 = OpConstantComposite %v2uint %uint_4 %uint_4");
    EXPECT_INST("%36 = OpConstantComposite %v2uint %uint_3 %uint_3");
    EXPECT_INST("%40 = OpConstantComposite %v2uint %uint_2 %uint_2");
    EXPECT_INST("%44 = OpConstantComposite %v2uint %uint_1 %uint_1");
    EXPECT_INST("%54 = OpConstantComposite %v2uint %uint_4294967295 %uint_4294967295");
    EXPECT_INST(R"(
          %7 = OpBitwiseAnd %v2uint %arg %8
         %10 = OpIEqual %v2bool %7 %11
         %15 = OpSelect %v2uint %10 %16 %11
         %18 = OpShiftRightLogical %v2uint %arg %15
         %19 = OpBitwiseAnd %v2uint %18 %20
         %22 = OpIEqual %v2bool %19 %11
         %23 = OpSelect %v2uint %22 %24 %11
         %26 = OpShiftRightLogical %v2uint %18 %23
         %27 = OpBitwiseAnd %v2uint %26 %28
         %30 = OpIEqual %v2bool %27 %11
         %31 = OpSelect %v2uint %30 %32 %11
         %34 = OpShiftRightLogical %v2uint %26 %31
         %35 = OpBitwiseAnd %v2uint %34 %36
         %38 = OpIEqual %v2bool %35 %11
         %39 = OpSelect %v2uint %38 %40 %11
         %42 = OpShiftRightLogical %v2uint %34 %39
         %43 = OpBitwiseAnd %v2uint %42 %44
         %46 = OpIEqual %v2bool %43 %11
         %47 = OpSelect %v2uint %46 %44 %11
         %48 = OpBitwiseOr %v2uint %39 %47
         %49 = OpBitwiseOr %v2uint %31 %48
         %50 = OpBitwiseOr %v2uint %23 %49
         %51 = OpBitwiseOr %v2uint %15 %50
         %52 = OpIEqual %v2bool %42 %11
     %result = OpSelect %v2uint %52 %54 %51
)");
}

TEST_F(SpirvWriterTest, Builtin_Saturate_F32) {
    auto* arg = b.FunctionParam("arg", ty.f32());
    auto* func = b.Function("foo", ty.f32());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f32(), core::Function::kSaturate, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %float %7 NClamp %arg %float_0 %float_1");
}

TEST_F(SpirvWriterTest, Builtin_Saturate_Vec4h) {
    auto* arg = b.FunctionParam("arg", ty.vec4<f16>());
    auto* func = b.Function("foo", ty.vec4<f16>());
    func->SetParams({arg});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f16>(), core::Function::kSaturate, arg);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(
        "%9 = OpConstantComposite %v4half %half_0x0p_0 %half_0x0p_0 %half_0x0p_0 %half_0x0p_0");
    EXPECT_INST(
        "%11 = OpConstantComposite %v4half %half_0x1p_0 %half_0x1p_0 %half_0x1p_0 %half_0x1p_0");
    EXPECT_INST("%result = OpExtInst %v4half %8 NClamp %arg %9 %11");
}

// Tests for builtins with the signature: T = func(T, T)
using Builtin_2arg = SpirvWriterTestWithParam<BuiltinTestCase>;
TEST_P(Builtin_2arg, Scalar) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeScalarType(params.type), params.function, MakeScalarValue(params.type),
               MakeScalarValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
TEST_P(Builtin_2arg, Vector) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeVectorType(params.type), params.function, MakeVectorValue(params.type),
               MakeVectorValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
INSTANTIATE_TEST_SUITE_P(SpirvWriterTest,
                         Builtin_2arg,
                         testing::Values(BuiltinTestCase{kF32, core::Function::kAtan2, "Atan2"},
                                         BuiltinTestCase{kF32, core::Function::kMax, "FMax"},
                                         BuiltinTestCase{kI32, core::Function::kMax, "SMax"},
                                         BuiltinTestCase{kU32, core::Function::kMax, "UMax"},
                                         BuiltinTestCase{kF32, core::Function::kMin, "FMin"},
                                         BuiltinTestCase{kI32, core::Function::kMin, "SMin"},
                                         BuiltinTestCase{kU32, core::Function::kMin, "UMin"},
                                         BuiltinTestCase{kF32, core::Function::kPow, "Pow"},
                                         BuiltinTestCase{kF16, core::Function::kPow, "Pow"},
                                         BuiltinTestCase{kF32, core::Function::kStep, "Step"},
                                         BuiltinTestCase{kF16, core::Function::kStep, "Step"}));

TEST_F(SpirvWriterTest, Builtin_Cross_vec3f) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec3<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec3<f32>());
    auto* func = b.Function("foo", ty.vec3<f32>());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec3<f32>(), core::Function::kCross, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v3float %9 Cross %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Distance_vec2f) {
    auto* arg1 = b.FunctionParam("arg1", MakeVectorType(kF32));
    auto* arg2 = b.FunctionParam("arg2", MakeVectorType(kF32));
    auto* func = b.Function("foo", MakeScalarType(kF32));
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(MakeScalarType(kF32), core::Function::kDistance, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %float %9 Distance %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Distance_vec3h) {
    auto* arg1 = b.FunctionParam("arg1", MakeVectorType(kF16));
    auto* arg2 = b.FunctionParam("arg2", MakeVectorType(kF16));
    auto* func = b.Function("foo", MakeScalarType(kF16));
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(MakeScalarType(kF16), core::Function::kDistance, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %half %9 Distance %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Dot_vec4f) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.f32());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f32(), core::Function::kDot, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpDot %float %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Dot_vec2i) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec2<i32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec2<i32>());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kDot, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %8 = OpCompositeExtract %int %arg1 0
          %9 = OpCompositeExtract %int %arg2 0
         %10 = OpIMul %int %8 %9
         %11 = OpCompositeExtract %int %arg1 1
         %12 = OpCompositeExtract %int %arg2 1
         %13 = OpIMul %int %11 %12
     %result = OpIAdd %int %10 %13
)");
}

TEST_F(SpirvWriterTest, Builtin_Dot_vec4u) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<u32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<u32>());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kDot, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(R"(
          %8 = OpCompositeExtract %uint %arg1 0
          %9 = OpCompositeExtract %uint %arg2 0
         %10 = OpIMul %uint %8 %9
         %11 = OpCompositeExtract %uint %arg1 1
         %12 = OpCompositeExtract %uint %arg2 1
         %13 = OpIMul %uint %11 %12
         %14 = OpIAdd %uint %10 %13
         %15 = OpCompositeExtract %uint %arg1 2
         %16 = OpCompositeExtract %uint %arg2 2
         %17 = OpIMul %uint %15 %16
         %18 = OpIAdd %uint %14 %17
         %19 = OpCompositeExtract %uint %arg1 3
         %20 = OpCompositeExtract %uint %arg2 3
         %21 = OpIMul %uint %19 %20
     %result = OpIAdd %uint %18 %21
)");
}

TEST_F(SpirvWriterTest, Builtin_Ldexp_F32) {
    auto* arg1 = b.FunctionParam("arg1", ty.f32());
    auto* arg2 = b.FunctionParam("arg2", ty.i32());
    auto* func = b.Function("foo", ty.f32());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f32(), core::Function::kLdexp, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %float %9 Ldexp %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Ldexp_F16) {
    auto* arg1 = b.FunctionParam("arg1", ty.f16());
    auto* arg2 = b.FunctionParam("arg2", ty.i32());
    auto* func = b.Function("foo", ty.f16());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.f16(), core::Function::kLdexp, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %half %9 Ldexp %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Ldexp_Vec2_F32) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec2<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec2<i32>());
    auto* func = b.Function("foo", ty.vec2<f32>());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<f32>(), core::Function::kLdexp, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v2float %11 Ldexp %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Ldexp_Vec3_F16) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec3<f16>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec3<i32>());
    auto* func = b.Function("foo", ty.vec3<f16>());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec3<f16>(), core::Function::kLdexp, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v3half %11 Ldexp %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Reflect_F32) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec3<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec3<f32>());
    auto* func = b.Function("foo", ty.vec3<f32>());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec3<f32>(), core::Function::kReflect, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v3float %9 Reflect %arg1 %arg2");
}

TEST_F(SpirvWriterTest, Builtin_Reflect_F16) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f16>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f16>());
    auto* func = b.Function("foo", ty.vec4<f16>());
    func->SetParams({arg1, arg2});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f16>(), core::Function::kReflect, arg1, arg2);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4half %9 Reflect %arg1 %arg2");
}

// Tests for builtins with the signature: T = func(T, T, T)
using Builtin_3arg = SpirvWriterTestWithParam<BuiltinTestCase>;
TEST_P(Builtin_3arg, Scalar) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeScalarType(params.type), params.function, MakeScalarValue(params.type),
               MakeScalarValue(params.type), MakeScalarValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
TEST_P(Builtin_3arg, Vector) {
    auto params = GetParam();

    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(MakeVectorType(params.type), params.function, MakeVectorValue(params.type),
               MakeVectorValue(params.type), MakeVectorValue(params.type));
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST(params.spirv_inst);
}
INSTANTIATE_TEST_SUITE_P(
    SpirvWriterTest,
    Builtin_3arg,
    testing::Values(BuiltinTestCase{kF32, core::Function::kClamp, "NClamp"},
                    BuiltinTestCase{kI32, core::Function::kClamp, "SClamp"},
                    BuiltinTestCase{kU32, core::Function::kClamp, "UClamp"},
                    BuiltinTestCase{kF32, core::Function::kFma, "Fma"},
                    BuiltinTestCase{kF16, core::Function::kFma, "Fma"},
                    BuiltinTestCase{kF32, core::Function::kMix, "Mix"},
                    BuiltinTestCase{kF16, core::Function::kMix, "Mix"},
                    BuiltinTestCase{kF32, core::Function::kSmoothstep, "SmoothStep"},
                    BuiltinTestCase{kF16, core::Function::kSmoothstep, "SmoothStep"}));

TEST_F(SpirvWriterTest, Builtin_ExtractBits_Scalar_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kExtractBits, arg, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldSExtract %int %arg %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_ExtractBits_Scalar_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kExtractBits, arg, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldUExtract %uint %arg %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_ExtractBits_Vector_I32) {
    auto* arg = b.FunctionParam("arg", ty.vec4<i32>());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.vec4<i32>());
    func->SetParams({arg, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<i32>(), core::Function::kExtractBits, arg, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldSExtract %v4int %arg %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_ExtractBits_Vector_U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec2<u32>(), core::Function::kExtractBits, arg, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldUExtract %v2uint %arg %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_InsertBits_Scalar_I32) {
    auto* arg = b.FunctionParam("arg", ty.i32());
    auto* newbits = b.FunctionParam("newbits", ty.i32());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({arg, newbits, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kInsertBits, arg, newbits, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldInsert %int %arg %newbits %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_InsertBits_Scalar_U32) {
    auto* arg = b.FunctionParam("arg", ty.u32());
    auto* newbits = b.FunctionParam("newbits", ty.u32());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.u32());
    func->SetParams({arg, newbits, offset, count});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.u32(), core::Function::kInsertBits, arg, newbits, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldInsert %uint %arg %newbits %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_InsertBits_Vector_I32) {
    auto* arg = b.FunctionParam("arg", ty.vec4<i32>());
    auto* newbits = b.FunctionParam("newbits", ty.vec4<i32>());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.vec4<i32>());
    func->SetParams({arg, newbits, offset, count});

    b.Append(func->Block(), [&] {
        auto* result =
            b.Call(ty.vec4<i32>(), core::Function::kInsertBits, arg, newbits, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldInsert %v4int %arg %newbits %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_InsertBits_Vector_U32) {
    auto* arg = b.FunctionParam("arg", ty.vec2<u32>());
    auto* newbits = b.FunctionParam("newbits", ty.vec2<u32>());
    auto* offset = b.FunctionParam("offset", ty.u32());
    auto* count = b.FunctionParam("count", ty.u32());
    auto* func = b.Function("foo", ty.vec2<u32>());
    func->SetParams({arg, newbits, offset, count});

    b.Append(func->Block(), [&] {
        auto* result =
            b.Call(ty.vec2<u32>(), core::Function::kInsertBits, arg, newbits, offset, count);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpBitFieldInsert %v2uint %arg %newbits %offset %count");
}

TEST_F(SpirvWriterTest, Builtin_FaceForward_F32) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec3<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec3<f32>());
    auto* arg3 = b.FunctionParam("arg3", ty.vec3<f32>());
    auto* func = b.Function("foo", ty.vec3<f32>());
    func->SetParams({arg1, arg2, arg3});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec3<f32>(), core::Function::kFaceForward, arg1, arg2, arg3);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v3float %10 FaceForward %arg1 %arg2 %arg3");
}

TEST_F(SpirvWriterTest, Builtin_FaceForward_F16) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f16>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f16>());
    auto* arg3 = b.FunctionParam("arg3", ty.vec4<f16>());
    auto* func = b.Function("foo", ty.vec4<f16>());
    func->SetParams({arg1, arg2, arg3});
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f16>(), core::Function::kFaceForward, arg1, arg2, arg3);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4half %10 FaceForward %arg1 %arg2 %arg3");
}

TEST_F(SpirvWriterTest, Builtin_Mix_VectorOperands_ScalarFactor) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f32>());
    auto* factor = b.FunctionParam("factor", ty.f32());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg1, arg2, factor});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kMix, arg1, arg2, factor);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%9 = OpCompositeConstruct %v4float %factor %factor %factor %factor");
    EXPECT_INST("%result = OpExtInst %v4float %11 FMix %arg1 %arg2 %9");
}

TEST_F(SpirvWriterTest, Builtin_Mix_VectorOperands_VectorFactor) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f32>());
    auto* factor = b.FunctionParam("factor", ty.vec4<f32>());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg1, arg2, factor});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kMix, arg1, arg2, factor);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4float %10 FMix %arg1 %arg2 %factor");
}

TEST_F(SpirvWriterTest, Builtin_Refract_F32) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f32>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f32>());
    auto* i = b.FunctionParam("i", ty.f32());
    auto* func = b.Function("foo", ty.vec4<f32>());
    func->SetParams({arg1, arg2, i});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f32>(), core::Function::kRefract, arg1, arg2, i);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4float %10 Refract %arg1 %arg2 %i");
}

TEST_F(SpirvWriterTest, Builtin_Refract_F16) {
    auto* arg1 = b.FunctionParam("arg1", ty.vec4<f16>());
    auto* arg2 = b.FunctionParam("arg2", ty.vec4<f16>());
    auto* i = b.FunctionParam("i", ty.f16());
    auto* func = b.Function("foo", ty.vec4<f16>());
    func->SetParams({arg1, arg2, i});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<f16>(), core::Function::kRefract, arg1, arg2, i);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpExtInst %v4half %10 Refract %arg1 %arg2 %i");
}

TEST_F(SpirvWriterTest, Builtin_Select_ScalarCondition_ScalarOperands) {
    auto* argf = b.FunctionParam("argf", ty.i32());
    auto* argt = b.FunctionParam("argt", ty.i32());
    auto* cond = b.FunctionParam("cond", ty.bool_());
    auto* func = b.Function("foo", ty.i32());
    func->SetParams({argf, argt, cond});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.i32(), core::Function::kSelect, argf, argt, cond);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpSelect %int %cond %argt %argf");
}

TEST_F(SpirvWriterTest, Builtin_Select_VectorCondition_VectorOperands) {
    auto* argf = b.FunctionParam("argf", ty.vec4<i32>());
    auto* argt = b.FunctionParam("argt", ty.vec4<i32>());
    auto* cond = b.FunctionParam("cond", ty.vec4<bool>());
    auto* func = b.Function("foo", ty.vec4<i32>());
    func->SetParams({argf, argt, cond});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<i32>(), core::Function::kSelect, argf, argt, cond);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%result = OpSelect %v4int %cond %argt %argf");
}

TEST_F(SpirvWriterTest, Builtin_Select_ScalarCondition_VectorOperands) {
    auto* argf = b.FunctionParam("argf", ty.vec4<i32>());
    auto* argt = b.FunctionParam("argt", ty.vec4<i32>());
    auto* cond = b.FunctionParam("cond", ty.bool_());
    auto* func = b.Function("foo", ty.vec4<i32>());
    func->SetParams({argf, argt, cond});

    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<i32>(), core::Function::kSelect, argf, argt, cond);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%11 = OpCompositeConstruct %v4bool %cond %cond %cond %cond");
    EXPECT_INST("%result = OpSelect %v4int %11 %argt %argf");
}

TEST_F(SpirvWriterTest, Builtin_StorageBarrier) {
    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(ty.void_(), core::Function::kStorageBarrier);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("OpControlBarrier %uint_2 %uint_2 %uint_72");
}

TEST_F(SpirvWriterTest, Builtin_WorkgroupBarrier) {
    auto* func = b.Function("foo", ty.void_());
    b.Append(func->Block(), [&] {
        b.Call(ty.void_(), core::Function::kWorkgroupBarrier);
        b.Return(func);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("OpControlBarrier %uint_2 %uint_2 %uint_264");
}

TEST_F(SpirvWriterTest, Builtin_SubgroupBallot) {
    auto* func = b.Function("foo", ty.vec4<u32>());
    b.Append(func->Block(), [&] {
        auto* result = b.Call(ty.vec4<u32>(), core::Function::kSubgroupBallot);
        mod.SetName(result, "result");
        b.Return(func, result);
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("OpCapability GroupNonUniformBallot");
    EXPECT_INST("%result = OpGroupNonUniformBallot %v4uint %uint_3 %true");
}

TEST_F(SpirvWriterTest, Builtin_ArrayLength) {
    auto* var = b.Var("var", ty.ptr(storage, ty.runtime_array(ty.i32())));
    var->SetBindingPoint(0, 0);
    b.RootBlock()->Append(var);

    auto* func = b.Function("foo", ty.u32());
    b.Append(func->Block(), [&] {
        auto* ptr = b.Let("ptr", var);
        auto* result = b.Call(ty.u32(), core::Function::kArrayLength, ptr);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%1 = OpVariable %_ptr_StorageBuffer_tint_symbol_1 StorageBuffer");
    EXPECT_INST("%result = OpArrayLength %uint %1 0");
}

TEST_F(SpirvWriterTest, Builtin_ArrayLength_WithStruct) {
    auto* arr = ty.runtime_array(ty.i32());
    auto* str = ty.Struct(mod.symbols.New("Buffer"), {
                                                         {mod.symbols.New("a"), ty.i32()},
                                                         {mod.symbols.New("b"), ty.i32()},
                                                         {mod.symbols.New("arr"), arr},
                                                     });
    auto* var = b.Var("var", ty.ptr(storage, str));
    var->SetBindingPoint(0, 0);
    b.RootBlock()->Append(var);

    auto* func = b.Function("foo", ty.u32());
    b.Append(func->Block(), [&] {
        auto* ptr = b.Let("ptr", b.Access(ty.ptr(storage, arr), var, 2_u));
        auto* result = b.Call(ty.u32(), core::Function::kArrayLength, ptr);
        b.Return(func, result);
        mod.SetName(result, "result");
    });

    ASSERT_TRUE(Generate()) << Error() << output_;
    EXPECT_INST("%1 = OpVariable %_ptr_StorageBuffer_tint_symbol StorageBuffer");
    EXPECT_INST("%result = OpArrayLength %uint %1 2");
}

}  // namespace
}  // namespace tint::spirv::writer