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// Copyright 2020 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.
//
// This file contains tests that run only on Liftoff, and each test verifies
// that the code was compiled by Liftoff. The default behavior is that each
// function is first attempted to be compiled by Liftoff, and if it fails, fall
// back to TurboFan. However we want to enforce that Liftoff is the tier that
// compiles these functions, in order to verify correctness of SIMD
// implementation in Liftoff.
#include "test/cctest/cctest.h"
#include "test/cctest/wasm/wasm-run-utils.h"
#include "test/common/wasm/test-signatures.h"
#include "test/common/wasm/wasm-macro-gen.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace test_run_wasm_simd_liftoff {
#define WASM_SIMD_LIFTOFF_TEST(name) \
void RunWasm_##name##_Impl(); \
TEST(RunWasm_##name##_liftoff) { \
EXPERIMENTAL_FLAG_SCOPE(simd); \
RunWasm_##name##_Impl(); \
} \
void RunWasm_##name##_Impl()
WASM_SIMD_LIFTOFF_TEST(S128Local) {
WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_SET_LOCAL(temp1, WASM_GET_LOCAL(temp1)), WASM_ONE);
CHECK_EQ(1, r.Call());
}
WASM_SIMD_LIFTOFF_TEST(S128Global) {
WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
int32_t* g0 = r.builder().AddGlobal<int32_t>(kWasmS128);
int32_t* g1 = r.builder().AddGlobal<int32_t>(kWasmS128);
BUILD(r, WASM_SET_GLOBAL(1, WASM_GET_GLOBAL(0)), WASM_ONE);
int32_t expected = 0x1234;
for (int i = 0; i < 4; i++) {
WriteLittleEndianValue<int32_t>(&g0[i], expected);
}
r.Call();
for (int i = 0; i < 4; i++) {
int32_t actual = ReadLittleEndianValue<int32_t>(&g1[i]);
CHECK_EQ(actual, expected);
}
}
WASM_SIMD_LIFTOFF_TEST(S128Param) {
// Test how SIMD parameters in functions are processed. There is no easy way
// to specify a SIMD value when initializing a WasmRunner, so we manually
// add a new function with the right signature, and call it from main.
WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
TestSignatures sigs;
// We use a temp local to materialize a SIMD value, since at this point
// Liftoff does not support any SIMD operations.
byte temp1 = r.AllocateLocal(kWasmS128);
WasmFunctionCompiler& simd_func = r.NewFunction(sigs.i_s());
BUILD(simd_func, WASM_ONE);
BUILD(r,
WASM_CALL_FUNCTION(simd_func.function_index(), WASM_GET_LOCAL(temp1)));
CHECK_EQ(1, r.Call());
}
WASM_SIMD_LIFTOFF_TEST(S128Return) {
// Test how functions returning SIMD values are processed.
WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
TestSignatures sigs;
WasmFunctionCompiler& simd_func = r.NewFunction(sigs.s_i());
byte temp1 = simd_func.AllocateLocal(kWasmS128);
BUILD(simd_func, WASM_GET_LOCAL(temp1));
BUILD(r, WASM_CALL_FUNCTION(simd_func.function_index(), WASM_ONE), kExprDrop,
WASM_ONE);
CHECK_EQ(1, r.Call());
}
// Exercise Liftoff's logic for zero-initializing stack slots. We were using an
// incorrect instruction for storing zeroes into the slot when the slot offset
// was too large to fit in the instruction as an immediate.
WASM_SIMD_LIFTOFF_TEST(FillStackSlotsWithZero_CheckStartOffset) {
WasmRunner<int64_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
// Function that takes in 32 i64 arguments, returns i64. This gets us a large
// enough starting offset from which we spill locals.
// start = 32 * 8 + 16 (instance) = 272 (cannot fit in signed int9).
FunctionSig* sig =
r.CreateSig<int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t,
int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t,
int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t,
int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t,
int64_t, int64_t, int64_t, int64_t, int64_t>();
WasmFunctionCompiler& simd_func = r.NewFunction(sig);
// We zero 16 bytes at a time using stp, so allocate locals such that we get a
// remainder, 8 in this case, so we hit the case where we use str.
simd_func.AllocateLocal(kWasmS128);
simd_func.AllocateLocal(kWasmI64);
BUILD(simd_func, WASM_I64V_1(1));
BUILD(r, WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1), WASM_I64V_1(1),
WASM_CALL_FUNCTION0(simd_func.function_index()));
CHECK_EQ(1, r.Call());
}
#undef WASM_SIMD_LIFTOFF_TEST
} // namespace test_run_wasm_simd_liftoff
} // namespace wasm
} // namespace internal
} // namespace v8
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