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// Copyright (c) 2012 The Chromium 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 "base/cpu.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
// Tests whether we can run extended instructions represented by the CPU
// information. This test actually executes some extended instructions (such as
// MMX, SSE, etc.) supported by the CPU and sees we can run them without
// "undefined instruction" exceptions. That is, this test succeeds when this
// test finishes without a crash.
TEST(CPU, RunExtendedInstructions) {
#if defined(ARCH_CPU_X86_FAMILY)
// Retrieve the CPU information.
base::CPU cpu;
// TODO(jschuh): crbug.com/168866 Find a way to enable this on Win64.
#if defined(OS_WIN) && !defined(_M_X64)
ASSERT_TRUE(cpu.has_mmx());
// Execute an MMX instruction.
__asm emms;
if (cpu.has_sse()) {
// Execute an SSE instruction.
__asm xorps xmm0, xmm0;
}
if (cpu.has_sse2()) {
// Execute an SSE 2 instruction.
__asm psrldq xmm0, 0;
}
if (cpu.has_sse3()) {
// Execute an SSE 3 instruction.
__asm addsubpd xmm0, xmm0;
}
if (cpu.has_ssse3()) {
// Execute a Supplimental SSE 3 instruction.
__asm psignb xmm0, xmm0;
}
if (cpu.has_sse41()) {
// Execute an SSE 4.1 instruction.
__asm pmuldq xmm0, xmm0;
}
if (cpu.has_sse42()) {
// Execute an SSE 4.2 instruction.
__asm crc32 eax, eax;
}
#elif defined(OS_POSIX) && defined(__x86_64__)
ASSERT_TRUE(cpu.has_mmx());
// Execute an MMX instruction.
__asm__ __volatile__("emms\n" : : : "mm0");
if (cpu.has_sse()) {
// Execute an SSE instruction.
__asm__ __volatile__("xorps %%xmm0, %%xmm0\n" : : : "xmm0");
}
if (cpu.has_sse2()) {
// Execute an SSE 2 instruction.
__asm__ __volatile__("psrldq $0, %%xmm0\n" : : : "xmm0");
}
if (cpu.has_sse3()) {
// Execute an SSE 3 instruction.
__asm__ __volatile__("addsubpd %%xmm0, %%xmm0\n" : : : "xmm0");
}
if (cpu.has_ssse3()) {
// Execute a Supplimental SSE 3 instruction.
__asm__ __volatile__("psignb %%xmm0, %%xmm0\n" : : : "xmm0");
}
if (cpu.has_sse41()) {
// Execute an SSE 4.1 instruction.
__asm__ __volatile__("pmuldq %%xmm0, %%xmm0\n" : : : "xmm0");
}
if (cpu.has_sse42()) {
// Execute an SSE 4.2 instruction.
__asm__ __volatile__("crc32 %%eax, %%eax\n" : : : "eax");
}
#endif
#endif
}
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