You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
273 lines
6.9 KiB
273 lines
6.9 KiB
/* Cpu detection code, extracted from mmx.h ((c)1997-99 by H. Dietz
|
|
and R. Fisher). Converted to C and improved by Fabrice Bellard */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "ac.h"
|
|
|
|
#include <string.h>
|
|
|
|
#ifdef ARCH_X86_64
|
|
# define REG_b "rbx"
|
|
# define REG_S "rsi"
|
|
#else
|
|
# define REG_b "ebx"
|
|
# define REG_S "esi"
|
|
#endif
|
|
|
|
//exported
|
|
int mm_flag;
|
|
|
|
/* ebx saving is necessary for PIC. gcc seems unable to see it alone */
|
|
#define cpuid(index,eax,ebx,ecx,edx)\
|
|
__asm __volatile\
|
|
("mov %%"REG_b", %%"REG_S"\n\t"\
|
|
"cpuid\n\t"\
|
|
"xchg %%"REG_b", %%"REG_S\
|
|
: "=a" (eax), "=S" (ebx),\
|
|
"=c" (ecx), "=d" (edx)\
|
|
: "0" (index));
|
|
|
|
#define CPUID_STD_MMX 0x00800000
|
|
#define CPUID_STD_SSE 0x02000000
|
|
#define CPUID_STD_SSE2 0x04000000
|
|
#define CPUID_STD_SSE3 0x00000001 // ECX!
|
|
#define CPUID_EXT_AMD_3DNOW 0x80000000
|
|
#define CPUID_EXT_AMD_3DNOWEXT 0x40000000
|
|
#define CPUID_EXT_AMD_MMXEXT 0x00400000
|
|
#define CPUID_EXT_CYR_MMX 0x00800000
|
|
#define CPUID_EXT_CYR_MMXEXT 0x01000000
|
|
|
|
/* Function to test if multimedia instructions are supported... */
|
|
static int mm_support(void)
|
|
{
|
|
int rval = 0;
|
|
#if defined(ARCH_X86) || defined(ARCH_X86_64)
|
|
int eax, ebx, ecx, edx;
|
|
int max_std_level, max_ext_level, std_caps=0, std_caps2=0, ext_caps=0;
|
|
long a, c;
|
|
|
|
char vendor[13] = "UnknownVndr";
|
|
|
|
__asm__ __volatile__ (
|
|
/* See if CPUID instruction is supported ... */
|
|
/* ... Get copies of EFLAGS into eax and ecx */
|
|
"pushf\n\t"
|
|
"pop %0\n\t"
|
|
"mov %0, %1\n\t"
|
|
|
|
/* ... Toggle the ID bit in one copy and store */
|
|
/* to the EFLAGS reg */
|
|
"xor $0x200000, %0\n\t"
|
|
"push %0\n\t"
|
|
"popf\n\t"
|
|
|
|
/* ... Get the (hopefully modified) EFLAGS */
|
|
"pushf\n\t"
|
|
"pop %0\n\t"
|
|
: "=a" (a), "=c" (c)
|
|
:
|
|
: "cc"
|
|
);
|
|
|
|
if (a == c)
|
|
return 0; /* CPUID not supported */
|
|
|
|
cpuid(0, max_std_level, ebx, ecx, edx);
|
|
|
|
/* highest cpuid is 0, no standard features */
|
|
if (max_std_level == 0)
|
|
return rval;
|
|
|
|
/* save the vendor string */
|
|
*(int *)vendor = ebx;
|
|
*(int *)&vendor[4] = edx;
|
|
*(int *)&vendor[8] = ecx;
|
|
|
|
if (max_std_level >= 1){
|
|
cpuid(1, eax, ebx, std_caps2, std_caps);
|
|
if (std_caps & (1<<15))
|
|
rval |= MM_CMOVE;
|
|
if (std_caps & (1<<23))
|
|
rval |= MM_MMX;
|
|
if (std_caps & (1<<25))
|
|
rval |= MM_MMXEXT | MM_SSE;
|
|
if (std_caps & (1<<26))
|
|
rval |= MM_SSE2;
|
|
}
|
|
|
|
cpuid(0x80000000, max_ext_level, ebx, ecx, edx);
|
|
|
|
if (max_ext_level >= 0x80000001) {
|
|
cpuid(0x80000001, eax, ebx, ecx, ext_caps);
|
|
}
|
|
|
|
cpuid(0, eax, ebx, ecx, edx);
|
|
if (strcmp(vendor, "AuthenticAMD") == 0) {
|
|
/* AMD */
|
|
if (ext_caps & (1<<22))
|
|
rval |= MM_MMXEXT;
|
|
if (ext_caps & (1<<31))
|
|
rval |= MM_3DNOW;
|
|
if (ext_caps & (1<<30))
|
|
rval |= MM_3DNOWEXT;
|
|
if (std_caps2 & (1<<0))
|
|
rval |= MM_SSE3;
|
|
} else if (strcmp(vendor, "CentaurHauls") == 0) {
|
|
/* VIA C3 */
|
|
if (ext_caps & (1<<24))
|
|
rval |= MM_MMXEXT;
|
|
} else if (strcmp(vendor, "CyrixInstead") == 0) {
|
|
/* Cyrix */
|
|
if (ext_caps & (1<<24))
|
|
rval |= MM_MMXEXT;
|
|
}
|
|
#if 0
|
|
av_log(NULL, AV_LOG_DEBUG, "%s%s%s%s%s%s\n",
|
|
(rval&MM_MMX) ? "MMX ":"",
|
|
(rval&MM_MMXEXT) ? "MMX2 ":"",
|
|
(rval&MM_SSE) ? "SSE ":"",
|
|
(rval&MM_SSE2) ? "SSE2 ":"",
|
|
(rval&MM_3DNOW) ? "3DNow ":"",
|
|
(rval&MM_3DNOWEXT) ? "3DNowExt ":"");
|
|
#endif
|
|
#endif /* ARCH_X86(_64) */
|
|
return rval;
|
|
}
|
|
|
|
|
|
int ac_mmflag(void)
|
|
{
|
|
//if (mm_flag==-1) {
|
|
mm_flag = mm_support();
|
|
#ifdef ARCH_X86
|
|
mm_flag |= MM_IA32ASM;
|
|
#endif
|
|
#ifdef ARCH_X86_64
|
|
mm_flag |= MM_AMD64ASM;
|
|
#endif
|
|
//}
|
|
return(mm_flag);
|
|
}
|
|
|
|
void ac_mmtest()
|
|
{
|
|
mm_flag=-1;
|
|
int cc=ac_mmflag();
|
|
return;
|
|
printf("(%s) available multimedia extensions:", __FILE__);
|
|
|
|
if(cc & MM_SSE3) {
|
|
printf(" sse3\n");
|
|
return;
|
|
} else if(cc & MM_SSE2) {
|
|
printf(" sse2\n");
|
|
return;
|
|
} else if(cc & MM_SSE) {
|
|
printf(" sse\n");
|
|
return;
|
|
} else if(cc & MM_3DNOWEXT) {
|
|
printf(" 3dnowext\n");
|
|
return;
|
|
} else if(cc & MM_3DNOW) {
|
|
printf(" 3dnow\n");
|
|
return;
|
|
} else if(cc & MM_MMXEXT) {
|
|
printf(" mmxext\n");
|
|
return;
|
|
} else if(cc & MM_MMX) {
|
|
printf(" mmx\n");
|
|
return;
|
|
} else if(cc & MM_AMD64ASM) {
|
|
printf(" 64asm\n");
|
|
return;
|
|
} else if(cc & MM_IA32ASM) {
|
|
printf(" 32asm\n");
|
|
return;
|
|
} else printf(" C\n");
|
|
}
|
|
|
|
/*
|
|
* Appends src to string dst of size siz (unlike strncat, siz is the
|
|
* full size of dst, not space left). At most siz-1 characters
|
|
* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
|
|
* Returns strlen(src) + MIN(siz, strlen(initial dst)).
|
|
* If retval >= siz, truncation occurred.
|
|
*/
|
|
size_t
|
|
strlcat(char *dst, const char *src, size_t siz)
|
|
{
|
|
char *d = dst;
|
|
const char *s = src;
|
|
size_t n = siz;
|
|
size_t dlen;
|
|
|
|
/* Find the end of dst and adjust bytes left but don't go past end */
|
|
while (n-- != 0 && *d != '\0')
|
|
d++;
|
|
dlen = d - dst;
|
|
n = siz - dlen;
|
|
|
|
if (n == 0)
|
|
return(dlen + strlen(s));
|
|
while (*s != '\0') {
|
|
if (n != 1) {
|
|
*d++ = *s;
|
|
n--;
|
|
}
|
|
s++;
|
|
}
|
|
*d = '\0';
|
|
|
|
return(dlen + (s - src)); /* count does not include NUL */
|
|
}
|
|
|
|
char *ac_mmstr(int flag, int mode)
|
|
{
|
|
static char mmstr[64]="";
|
|
int cc;
|
|
|
|
if(flag==-1)
|
|
//get full mm caps
|
|
cc=ac_mmflag();
|
|
else
|
|
cc=flag;
|
|
|
|
//return max supported mm extensions, or str for user provided flag
|
|
if(mode==0) {
|
|
if(cc & MM_SSE3) {
|
|
return("sse3");
|
|
} else if(cc & MM_SSE2) {
|
|
return("sse2");
|
|
} else if(cc & MM_SSE) {
|
|
return("sse");
|
|
} else if(cc & MM_3DNOWEXT) {
|
|
return("3dnowext");
|
|
} else if(cc & MM_3DNOW) {
|
|
return("3dnow");
|
|
} else if(cc & MM_MMXEXT) {
|
|
return("mmxext");
|
|
} else if(cc & MM_MMX) {
|
|
return("mmx");
|
|
} else if(cc & (MM_AMD64ASM|MM_IA32ASM)) {
|
|
return("asm");
|
|
} else return("C");
|
|
}
|
|
|
|
//return full capability list
|
|
if(mode==1) {
|
|
if(cc & MM_SSE3) strlcat(mmstr, "sse3 ", sizeof(mmstr));
|
|
if(cc & MM_SSE2) strlcat(mmstr, "sse2 ", sizeof(mmstr));
|
|
if(cc & MM_SSE) strlcat(mmstr, "sse ", sizeof(mmstr));
|
|
if(cc & MM_3DNOWEXT) strlcat(mmstr, "3dnowext ", sizeof(mmstr));
|
|
if(cc & MM_3DNOW) strlcat(mmstr, "3dnow ", sizeof(mmstr));
|
|
if(cc & MM_MMXEXT) strlcat(mmstr, "mmxext ", sizeof(mmstr));
|
|
if(cc & MM_MMX) strlcat(mmstr, "mmx ", sizeof(mmstr));
|
|
if(cc & (MM_AMD64ASM|MM_IA32ASM)) strlcat(mmstr, "asm ", sizeof(mmstr));
|
|
strlcat(mmstr, "C", sizeof(mmstr));
|
|
return(mmstr);
|
|
}
|
|
|
|
return("");
|
|
}
|