cccbd5f123
This relands commit 7c32fa05df.
Some test cases need to be updated, since we will bail out to TurboFan
where previously Liftoff was happy to run, when SIMD is not supported.
Original change's description:
> [wasm-simd][liftoff] Check CpuFeatures for SIMD support
>
> If Wasm simd128 is not supported on this particular hardware, we bail
> out to TurboFan.
>
> Bug: v8:9909
> Change-Id: Ie46e154426783ba099b7c0facc906670cda1bdd0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2029427
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66055}
Bug: v8:9909
Bug: v8:10169
Change-Id: I850e1fe6bfbd12fb2eec052aa8367624c09f7a08
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2030354
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66090}
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// This file contains tests that run only on Liftoff, and each test verifies
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// that the code was compiled by Liftoff. The default behavior is that each
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// function is first attempted to be compiled by Liftoff, and if it fails, fall
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// back to TurboFan. However we want to enforce that Liftoff is the tier that
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// compiles these functions, in order to verify correctness of SIMD
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// implementation in Liftoff.
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#include "test/cctest/cctest.h"
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#include "test/cctest/wasm/wasm-run-utils.h"
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#include "test/common/wasm/test-signatures.h"
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#include "test/common/wasm/wasm-macro-gen.h"
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namespace v8 {
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namespace internal {
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namespace wasm {
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namespace test_run_wasm_simd_liftoff {
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#define WASM_SIMD_LIFTOFF_TEST(name) \
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void RunWasm_##name##_Impl(); \
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TEST(RunWasm_##name##_liftoff) { \
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EXPERIMENTAL_FLAG_SCOPE(simd); \
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RunWasm_##name##_Impl(); \
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} \
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void RunWasm_##name##_Impl()
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WASM_SIMD_LIFTOFF_TEST(S128Local) {
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WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
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byte temp1 = r.AllocateLocal(kWasmS128);
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BUILD(r, WASM_SET_LOCAL(temp1, WASM_GET_LOCAL(temp1)), WASM_ONE);
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CHECK_EQ(1, r.Call());
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}
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WASM_SIMD_LIFTOFF_TEST(S128Global) {
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WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
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int32_t* g0 = r.builder().AddGlobal<int32_t>(kWasmS128);
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int32_t* g1 = r.builder().AddGlobal<int32_t>(kWasmS128);
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BUILD(r, WASM_SET_GLOBAL(1, WASM_GET_GLOBAL(0)), WASM_ONE);
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int32_t expected = 0x1234;
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for (int i = 0; i < 4; i++) {
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WriteLittleEndianValue<int32_t>(&g0[i], expected);
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}
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r.Call();
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for (int i = 0; i < 4; i++) {
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int32_t actual = ReadLittleEndianValue<int32_t>(&g1[i]);
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CHECK_EQ(actual, expected);
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}
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}
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WASM_SIMD_LIFTOFF_TEST(S128Param) {
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// Test how SIMD parameters in functions are processed. There is no easy way
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// to specify a SIMD value when initializing a WasmRunner, so we manually
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// add a new function with the right signature, and call it from main.
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WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
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TestSignatures sigs;
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// We use a temp local to materialize a SIMD value, since at this point
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// Liftoff does not support any SIMD operations.
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byte temp1 = r.AllocateLocal(kWasmS128);
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WasmFunctionCompiler& simd_func = r.NewFunction(sigs.i_s());
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BUILD(simd_func, WASM_ONE);
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BUILD(r,
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WASM_CALL_FUNCTION(simd_func.function_index(), WASM_GET_LOCAL(temp1)));
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CHECK_EQ(1, r.Call());
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}
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WASM_SIMD_LIFTOFF_TEST(S128Return) {
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// Test how functions returning SIMD values are processed.
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WasmRunner<int32_t> r(ExecutionTier::kLiftoff, kNoLowerSimd);
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TestSignatures sigs;
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WasmFunctionCompiler& simd_func = r.NewFunction(sigs.s_i());
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byte temp1 = simd_func.AllocateLocal(kWasmS128);
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BUILD(simd_func, WASM_GET_LOCAL(temp1));
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BUILD(r, WASM_CALL_FUNCTION(simd_func.function_index(), WASM_ONE), kExprDrop,
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WASM_ONE);
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CHECK_EQ(1, r.Call());
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}
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#undef WASM_SIMD_LIFTOFF_TEST
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} // namespace test_run_wasm_simd_liftoff
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} // namespace wasm
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} // namespace internal
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} // namespace v8
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