Commit 392f6da8 authored by Zuxy Meng's avatar Zuxy Meng Committed by Guillaume Poirier
Browse files

Remove unused and unsupported Cyrix's "Extended MMX",

Add SSE3 support.
Patch by Zuxy Meng < zuxy POIS meng AH gmail POIS com >
Original thread:
04/26/06 13:13:
[Ffmpeg-devel] [PATCH] Bug fix,	SSE3 support in i386/cputest.c and dsputil.h

Originally committed as revision 5326 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 9c445fbe
......@@ -432,6 +432,7 @@ int mm_support(void);
#define MM_SSE 0x0008 /* SSE functions */
#define MM_SSE2 0x0010 /* PIV SSE2 functions */
#define MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
#define MM_SSE3 0x0040 /* Prescott SSE3 functions */
extern int mm_flags;
......
......@@ -64,6 +64,8 @@ int mm_support(void)
rval |= MM_MMXEXT | MM_SSE;
if (std_caps & (1<<26))
rval |= MM_SSE2;
if (ecx & 1)
rval |= MM_SSE3;
}
cpuid(0x80000000, max_ext_level, ebx, ecx, edx);
......@@ -76,38 +78,10 @@ int mm_support(void)
rval |= MM_3DNOWEXT;
if (ext_caps & (1<<23))
rval |= MM_MMX;
}
cpuid(0, eax, ebx, ecx, edx);
if ( ebx == 0x68747541 &&
edx == 0x69746e65 &&
ecx == 0x444d4163) {
/* AMD */
if(ext_caps & (1<<22))
rval |= MM_MMXEXT;
} else if (ebx == 0x746e6543 &&
edx == 0x48727561 &&
ecx == 0x736c7561) { /* "CentaurHauls" */
/* VIA C3 */
if(ext_caps & (1<<24))
rval |= MM_MMXEXT;
} else if (ebx == 0x69727943 &&
edx == 0x736e4978 &&
ecx == 0x64616574) {
/* Cyrix Section */
/* See if extended CPUID level 80000001 is supported */
/* The value of CPUID/80000001 for the 6x86MX is undefined
according to the Cyrix CPU Detection Guide (Preliminary
Rev. 1.01 table 1), so we'll check the value of eax for
CPUID/0 to see if standard CPUID level 2 is supported.
According to the table, the only CPU which supports level
2 is also the only one which supports extended CPUID levels.
*/
if (eax < 2)
return rval;
if (ext_caps & (1<<24))
if (ext_caps & (1<<22))
rval |= MM_MMXEXT;
}
#if 0
av_log(NULL, AV_LOG_DEBUG, "%s%s%s%s%s%s\n",
(rval&MM_MMX) ? "MMX ":"",
......
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