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libFLAC/cpu.c : Refactor disabling SSE into a single function.

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Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo 2014-08-09 12:51:32 +10:00
parent 7c66452886
commit 01d1aa7b54
1 changed files with 18 additions and 11 deletions
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29
src/libFLAC/cpu.c
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@ -40,6 +40,11 @@
#if defined FLAC__CPU_IA32
# include <signal.h>
static void disable_sse(FLAC__CPUInfo *info)
{
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
}
#elif defined FLAC__CPU_PPC
# if !defined FLAC__NO_ASM
# if defined FLAC__SYS_DARWIN
@ -215,7 +220,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
if(info->ia32.sse) {
#if defined FLAC__NO_SSE_OS
/* assume user knows better than us; turn it off */
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
#elif defined FLAC__SSE_OS
/* assume user knows better than us; leave as detected above */
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__APPLE__)
@ -225,21 +230,23 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
len = sizeof(sse); sse = sse || (sysctlbyname("hw.instruction_sse", &sse, &len, NULL, 0) == 0 && sse);
len = sizeof(sse); sse = sse || (sysctlbyname("hw.optional.sse" , &sse, &len, NULL, 0) == 0 && sse); /* __APPLE__ ? */
if(!sse)
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
#elif defined(__NetBSD__) || defined (__OpenBSD__)
# if __NetBSD_Version__ >= 105250000 || (defined __OpenBSD__)
int val = 0, mib[2] = { CTL_MACHDEP, CPU_SSE };
size_t len = sizeof(val);
if(sysctl(mib, 2, &val, &len, NULL, 0) < 0 || !val)
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
else { /* double-check SSE2 */
mib[1] = CPU_SSE2;
len = sizeof(val);
if(sysctl(mib, 2, &val, &len, NULL, 0) < 0 || !val)
info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
if(sysctl(mib, 2, &val, &len, NULL, 0) < 0 || !val) {
disable_sse(info);
info->ia32.fxsr = info->ia32.sse = true;
}
}
# else
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
# endif
#elif defined(__linux__)
int sse = 0;
@ -273,7 +280,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
}
if(!sse)
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
#elif defined(_MSC_VER)
__try {
__asm {
@ -282,7 +289,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
}
__except(EXCEPTION_EXECUTE_HANDLER) {
if (_exception_code() == STATUS_ILLEGAL_INSTRUCTION)
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
}
#elif defined(__GNUC__) /* MinGW goes here */
int sse = 0;
@ -308,17 +315,17 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
sse = 1;
}
if(!sse)
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
#else
/* no way to test, disable to be safe */
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
#endif
#ifdef DEBUG
fprintf(stderr, " SSE OS sup . %c\n", info->ia32.sse ? 'Y' : 'n');
#endif
}
else /* info->ia32.sse == false */
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
disable_sse(info);
}
#else
info->use_asm = false;