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Kmake/deps/v8/test/unittests/wasm/liftoff-register-unittests.cc

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2026-05-26 23:36:42 -07:00
// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/wasm/baseline/liftoff-assembler-defs.h"
#if V8_TARGET_ARCH_IA32
#include "src/execution/ia32/frame-constants-ia32.h"
#elif V8_TARGET_ARCH_X64
#include "src/execution/x64/frame-constants-x64.h"
#elif V8_TARGET_ARCH_MIPS64
#include "src/execution/mips64/frame-constants-mips64.h"
#elif V8_TARGET_ARCH_LOONG64
#include "src/execution/loong64/frame-constants-loong64.h"
#elif V8_TARGET_ARCH_ARM
#include "src/execution/arm/frame-constants-arm.h"
#elif V8_TARGET_ARCH_ARM64
#include "src/execution/arm64/frame-constants-arm64.h"
#elif V8_TARGET_ARCH_S390X
#include "src/execution/s390/frame-constants-s390.h"
#elif V8_TARGET_ARCH_PPC64
#include "src/execution/ppc/frame-constants-ppc.h"
#elif V8_TARGET_ARCH_RISCV32 || V8_TARGET_ARCH_RISCV64
#include "src/execution/riscv/frame-constants-riscv.h"
#endif
#include "src/wasm/baseline/liftoff-register.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace internal {
namespace wasm {
// The registers used by Liftoff and the registers spilled by the
// WasmDebugBreak builtin should match.
static_assert(kLiftoffAssemblerGpCacheRegs ==
WasmDebugBreakFrameConstants::kPushedGpRegs);
static_assert(kLiftoffAssemblerFpCacheRegs ==
WasmDebugBreakFrameConstants::kPushedFpRegs);
class WasmRegisterTest : public ::testing::Test {};
TEST_F(WasmRegisterTest, SpreadSetBitsToAdjacentFpRegs) {
LiftoffRegList input(
// GP reg selection criteria: an even and an odd register belonging to
// separate adjacent pairs, and contained in kLiftoffAssemblerGpCacheRegs
// for the given platform.
#if V8_TARGET_ARCH_S390X || V8_TARGET_ARCH_PPC64 || V8_TARGET_ARCH_LOONG64
LiftoffRegister::from_code(kGpReg, 4),
LiftoffRegister::from_code(kGpReg, 7),
#elif V8_TARGET_ARCH_RISCV32 || V8_TARGET_ARCH_RISCV64
LiftoffRegister::from_code(kGpReg, 10),
LiftoffRegister::from_code(kGpReg, 13),
#else
LiftoffRegister::from_code(kGpReg, 1),
LiftoffRegister::from_code(kGpReg, 2),
#endif
LiftoffRegister::from_code(kFpReg, 1),
LiftoffRegister::from_code(kFpReg, 4));
// GP regs are left alone, FP regs are spread to adjacent pairs starting
// at an even index: 1 → (0, 1) and 4 → (4, 5).
#if V8_TARGET_ARCH_RISCV32 || V8_TARGET_ARCH_RISCV64 || V8_TARGET_ARCH_IA32
// RISCV and ia32 don't have code 0 in kLiftoffAssemblerFpCacheRegs
LiftoffRegList expected =
input | LiftoffRegList(LiftoffRegister::from_code(kFpReg, 5));
#else
LiftoffRegList expected =
input | LiftoffRegList(LiftoffRegister::from_code(kFpReg, 0),
LiftoffRegister::from_code(kFpReg, 5));
#endif
LiftoffRegList actual = input.SpreadSetBitsToAdjacentFpRegs();
EXPECT_EQ(expected, actual);
}
} // namespace wasm
} // namespace internal
} // namespace v8