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Bug 998158 - SpiderMonkey: Outline setSSECheckState(). r=sstangl

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This commit is contained in:
Dan Gohman 2014-04-21 17:34:59 -07:00
parent 62a83f447c
commit 22e1966ad6
2 changed files with 120 additions and 118 deletions
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119
js/src/assembler/assembler/MacroAssemblerX86Common.cpp
View File

@ -11,6 +11,13 @@
#include "assembler/assembler/MacroAssemblerX86Common.h"
#if WTF_COMPILER_MSVC
#if WTF_CPU_X86_64
/* for __cpuid */
#include <intrin.h>
#endif
#endif
using namespace JSC;
MacroAssemblerX86Common::SSECheckState MacroAssemblerX86Common::s_sseCheckState = NotCheckedSSE;
@ -20,5 +27,117 @@ bool MacroAssemblerX86Common::s_SSE3Disabled = false;
bool MacroAssemblerX86Common::s_SSE4Disabled = false;
#endif
void MacroAssemblerX86Common::setSSECheckState()
{
// Default the flags value to zero; if the compiler is
// not MSVC or GCC we will read this as SSE2 not present.
volatile int flags_edx = 0;
volatile int flags_ecx = 0;
#if WTF_COMPILER_MSVC
#if WTF_CPU_X86_64
int cpuinfo[4];
__cpuid(cpuinfo, 1);
flags_ecx = cpuinfo[2];
flags_edx = cpuinfo[3];
#else
_asm {
mov eax, 1 // cpuid function 1 gives us the standard feature set
cpuid;
mov flags_ecx, ecx;
mov flags_edx, edx;
}
#endif
#elif WTF_COMPILER_GCC
#if WTF_CPU_X86_64
asm (
"movl $0x1, %%eax;"
"pushq %%rbx;"
"cpuid;"
"popq %%rbx;"
"movl %%ecx, %0;"
"movl %%edx, %1;"
: "=g" (flags_ecx), "=g" (flags_edx)
:
: "%eax", "%ecx", "%edx"
);
#else
asm (
"movl $0x1, %%eax;"
"pushl %%ebx;"
"cpuid;"
"popl %%ebx;"
"movl %%ecx, %0;"
"movl %%edx, %1;"
: "=g" (flags_ecx), "=g" (flags_edx)
:
: "%eax", "%ecx", "%edx"
);
#endif
#elif WTF_COMPILER_SUNCC
#if WTF_CPU_X86_64
asm (
"movl $0x1, %%eax;"
"pushq %%rbx;"
"cpuid;"
"popq %%rbx;"
"movl %%ecx, (%rsi);"
"movl %%edx, (%rdi);"
:
: "S" (&flags_ecx), "D" (&flags_edx)
: "%eax", "%ecx", "%edx"
);
#else
asm (
"movl $0x1, %eax;"
"pushl %ebx;"
"cpuid;"
"popl %ebx;"
"movl %ecx, (%esi);"
"movl %edx, (%edi);"
:
: "S" (&flags_ecx), "D" (&flags_edx)
: "%eax", "%ecx", "%edx"
);
#endif
#endif
#ifdef DEBUG
if (s_floatingPointDisabled) {
// Disable SSE2.
s_sseCheckState = HasSSE;
return;
}
#endif
static const int SSEFeatureBit = 1 << 25;
static const int SSE2FeatureBit = 1 << 26;
static const int SSE3FeatureBit = 1 << 0;
static const int SSSE3FeatureBit = 1 << 9;
static const int SSE41FeatureBit = 1 << 19;
static const int SSE42FeatureBit = 1 << 20;
if (flags_ecx & SSE42FeatureBit)
s_sseCheckState = HasSSE4_2;
else if (flags_ecx & SSE41FeatureBit)
s_sseCheckState = HasSSE4_1;
else if (flags_ecx & SSSE3FeatureBit)
s_sseCheckState = HasSSSE3;
else if (flags_ecx & SSE3FeatureBit)
s_sseCheckState = HasSSE3;
else if (flags_edx & SSE2FeatureBit)
s_sseCheckState = HasSSE2;
else if (flags_edx & SSEFeatureBit)
s_sseCheckState = HasSSE;
else
s_sseCheckState = NoSSE;
#ifdef DEBUG
if (s_sseCheckState >= HasSSE4_1 && s_SSE4Disabled)
s_sseCheckState = HasSSE3;
if (s_sseCheckState >= HasSSE3 && s_SSE3Disabled)
s_sseCheckState = HasSSE2;
#endif
}
#endif /* WTF_CPU_X86 || WTF_CPU_X86_64 */

119
js/src/assembler/assembler/MacroAssemblerX86Common.h
View File

@ -37,13 +37,6 @@
#include "assembler/assembler/X86Assembler.h"
#include "assembler/assembler/AbstractMacroAssembler.h"
#if WTF_COMPILER_MSVC
#if WTF_CPU_X86_64
/* for __cpuid */
#include <intrin.h>
#endif
#endif
namespace JSC {
class MacroAssemblerX86Common : public AbstractMacroAssembler<X86Assembler> {
@ -1300,117 +1293,7 @@ private:
static SSECheckState s_sseCheckState;
static void setSSECheckState()
{
// Default the flags value to zero; if the compiler is
// not MSVC or GCC we will read this as SSE2 not present.
volatile int flags_edx = 0;
volatile int flags_ecx = 0;
#if WTF_COMPILER_MSVC
#if WTF_CPU_X86_64
int cpuinfo[4];
__cpuid(cpuinfo, 1);
flags_ecx = cpuinfo[2];
flags_edx = cpuinfo[3];
#else
_asm {
mov eax, 1 // cpuid function 1 gives us the standard feature set
cpuid;
mov flags_ecx, ecx;
mov flags_edx, edx;
}
#endif
#elif WTF_COMPILER_GCC
#if WTF_CPU_X86_64
asm (
"movl $0x1, %%eax;"
"pushq %%rbx;"
"cpuid;"
"popq %%rbx;"
"movl %%ecx, %0;"
"movl %%edx, %1;"
: "=g" (flags_ecx), "=g" (flags_edx)
:
: "%eax", "%ecx", "%edx"
);
#else
asm (
"movl $0x1, %%eax;"
"pushl %%ebx;"
"cpuid;"
"popl %%ebx;"
"movl %%ecx, %0;"
"movl %%edx, %1;"
: "=g" (flags_ecx), "=g" (flags_edx)
:
: "%eax", "%ecx", "%edx"
);
#endif
#elif WTF_COMPILER_SUNCC
#if WTF_CPU_X86_64
asm (
"movl $0x1, %%eax;"
"pushq %%rbx;"
"cpuid;"
"popq %%rbx;"
"movl %%ecx, (%rsi);"
"movl %%edx, (%rdi);"
:
: "S" (&flags_ecx), "D" (&flags_edx)
: "%eax", "%ecx", "%edx"
);
#else
asm (
"movl $0x1, %eax;"
"pushl %ebx;"
"cpuid;"
"popl %ebx;"
"movl %ecx, (%esi);"
"movl %edx, (%edi);"
:
: "S" (&flags_ecx), "D" (&flags_edx)
: "%eax", "%ecx", "%edx"
);
#endif
#endif
#ifdef DEBUG
if (s_floatingPointDisabled) {
// Disable SSE2.
s_sseCheckState = HasSSE;
return;
}
#endif
static const int SSEFeatureBit = 1 << 25;
static const int SSE2FeatureBit = 1 << 26;
static const int SSE3FeatureBit = 1 << 0;
static const int SSSE3FeatureBit = 1 << 9;
static const int SSE41FeatureBit = 1 << 19;
static const int SSE42FeatureBit = 1 << 20;
if (flags_ecx & SSE42FeatureBit)
s_sseCheckState = HasSSE4_2;
else if (flags_ecx & SSE41FeatureBit)
s_sseCheckState = HasSSE4_1;
else if (flags_ecx & SSSE3FeatureBit)
s_sseCheckState = HasSSSE3;
else if (flags_ecx & SSE3FeatureBit)
s_sseCheckState = HasSSE3;
else if (flags_edx & SSE2FeatureBit)
s_sseCheckState = HasSSE2;
else if (flags_edx & SSEFeatureBit)
s_sseCheckState = HasSSE;
else
s_sseCheckState = NoSSE;
#ifdef DEBUG
if (s_sseCheckState >= HasSSE4_1 && s_SSE4Disabled)
s_sseCheckState = HasSSE3;
if (s_sseCheckState >= HasSSE3 && s_SSE3Disabled)
s_sseCheckState = HasSSE2;
#endif
}
static void setSSECheckState();
public:
#if WTF_CPU_X86