Architecture detection tool which may be used for various purposes.

This commit is contained in:
n-a-c-h
2005-11-01 23:28:52 +00:00
parent 36ae24ab78
commit 70dc0095df

396
zsnes/src/tools/archopt.c Normal file
View File

@@ -0,0 +1,396 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define cpuid(in, a, b, c, d) asm volatile("cpuid": "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (in));
char *x86_flags[] =
{ "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
"cx8", "apic", 0, "sep", "mtrr", "pge", "mca", "cmov",
"pat", "pse36", "pn", "clflush", 0, "dts", "acpi", "mmx",
"fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, "syscall", 0, 0, 0, 0,
0, 0, 0, "mp", "nx", 0, "mmxext", 0,
0, "fxsr_opt", 0, 0, 0, "lm", "3dnowext", "3dnow",
"recovery", "longrun", 0, "lrti", 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
"pni", 0, 0, "monitor", "ds_cpl", 0, 0, "est",
"tm2", 0, "cid", 0, 0, 0, "xtpr", 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, "rng", "rng_en", 0, 0, "ace", "ace_en",
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
"lahf_lm", "cmp_legacy", 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0 };
void add_flags(char *flags, unsigned int reg, unsigned int offset)
{
unsigned int i;
for (i = 0; i < 32; i++)
{
if ((reg & (1 << i)) && x86_flags[i+offset])
{
strcat(flags, x86_flags[i+offset]);
strcat(flags, " ");
}
}
}
int have_cpuid()
{
int have = 0x200000;
asm volatile
(
"pushfl \n\t"
"pop %%eax \n\t"
"movl %%eax,%%edx \n\t"
"xorl %%ecx,%%eax \n\t"
"push %%eax \n\t"
"popfl \n\t"
"pushfl \n\t"
"pop %%eax \n\t"
"xorl %%edx,%%eax \n\t"
: "=a" (have)
: "c" (have)
);
return(have);
}
int main()
{
char model_name[216];
char flags[216];
char cpu_family[216];
char vendor_id[216];
char model[216];
char *cpu = 0;
FILE *fp;
*model_name = 0;
*cpu_family = 0;
*vendor_id = 0;
*model = 0;
strcpy(flags, " ");
if ((fp = fopen("/proc/cpuinfo", "r")))
{
char line[256], key[40], arg[216];
const char *pattern = " %39[^:]: %215[ -~]"; // for sscanf
while (fgets(line, sizeof(line), fp) && sscanf(line, pattern, key, arg) == 2)
{
if (!strncmp(key, "model name", strlen("model name")) && !*model_name)
{
strcpy(model_name, arg);
}
else if (!strncmp(key, "flags", strlen("flags")) && !flags[1])
{
strcat(flags, arg);
strcat(flags, " ");
}
else if (!strncmp(key, "cpu family", strlen("cpu family")) && !*cpu_family)
{
strcpy(cpu_family, arg);
}
else if (!strncmp(key, "vendor_id", strlen("vendor_id")) && !*vendor_id)
{
strcpy(vendor_id, arg);
}
else if (!strncmp(key, "model", strlen("model")) && !*model)
{
strcpy(model, arg);
}
}
fclose(fp);
}
else if (have_cpuid())
{
unsigned int maxei, eax, ebx, ecx, edx, unused, i;
cpuid(0, unused, ebx, ecx, edx);
strncat(vendor_id, (char *)&ebx, 4);
strncat(vendor_id, (char *)&edx, 4);
strncat(vendor_id, (char *)&ecx, 4);
cpuid(1, eax, ebx, ecx, edx);
sprintf(model, "%u", (eax >> 4) & 0xf);
sprintf(cpu_family, "%u", (eax >> 8) & 0xf);
add_flags(flags, edx, 0);
add_flags(flags, ecx, 96);
cpuid(0x80000000, maxei, unused, unused, unused);
if (maxei >= 0x80000001)
{
cpuid(0x80000001, unused, unused, ecx, edx);
add_flags(flags, edx, 32);
add_flags(flags, ecx, 160);
}
//Transmeta
cpuid(0x80860000, eax, unused, unused, unused);
if (((eax & 0xffff0000) == 0x80860000) && (eax > 0x80860001))
{
cpuid(0x80860001, unused, unused, unused, edx);
add_flags(flags, edx, 64);
}
//Centaur
cpuid(0xC0000000, eax, unused, unused, unused);
if (eax >= 0xC0000001)
{
cpuid(0xC0000001, unused, unused, unused, edx);
add_flags(flags, edx, 128);
}
if (maxei >= 0x80000002)
{
for (i = 0x80000002; i <= 0x80000004; i++)
{
cpuid(i, eax, ebx, ecx, edx);
strncat(model_name, (char *)&eax, 4);
strncat(model_name, (char *)&ebx, 4);
strncat(model_name, (char *)&ecx, 4);
strncat(model_name, (char *)&edx, 4);
}
}
}
if (*cpu_family && *vendor_id)
{
if (!strcmp(vendor_id, "AuthenticAMD") || strstr(model_name, "AMD"))
{
if (strstr(flags, " mmx "))
{
#if __GNUC__ > 2
if (strstr(flags, " 3dnow "))
{
if (strstr(flags, " 3dnowext ") && (atoi(cpu_family) > 5))
{
#if __GNUC__ > 3 || __GNUC_MINOR__ > 0
if (strstr(flags, " sse "))
{
#if __GNUC__ > 3 || __GNUC_MINOR__ > 3
if (strstr(flags, " sse2 ") && strstr(flags, " lm ")) //Need two checks to protect Semprons
{
if (strstr(model_name, "Opteron"))
{
cpu = "opteron";
}
else if (strstr(model_name, "Athlon(tm) 64")) //Also athlon-fx
{
cpu = "athlon64";
}
else
{
cpu = "k8";
}
}
#endif
if (!cpu)
{
if (strstr(model_name, "Athlon(tm) 4"))
{
cpu = "athlon-4";
}
else if (strstr(model_name, "Athlon(tm) MP"))
{
cpu = "athlon-mp";
}
else
{
cpu = "athlon-xp";
}
}
}
if (!cpu && (atoi(model) > 3))
{
cpu = "athlon-tbird";
}
#endif
if (!cpu)
{
cpu = "athlon";
}
}
#if __GNUC__ > 3 || __GNUC_MINOR__ > 0
if (!cpu)
{
int model_num = atoi(model);
if ((model_num == 9) || (model_num >= 13))
{
cpu = "k6-3";
}
else
{
cpu = "k6-2";
}
}
#endif
}
#endif
if (!cpu)
{
cpu = "k6";
}
}
}
else if (!strcmp(vendor_id, "GenuineIntel") || strstr(model_name, "Intel"))
{
#if __GNUC__ > 2
if (strstr(flags, " mmx "))
{
if (strstr(flags, " sse "))
{
if (strstr(flags, " sse2 "))
{
#if __GNUC__ > 3 || __GNUC_MINOR__ > 2
if (strstr(flags, " pni "))
{
if (strstr(flags, " lm "))
{
cpu = "nocona";
}
else
{
cpu = "prescott";
}
}
#endif
if (!cpu)
{
if (!strcmp(cpu_family, "6"))
{
#if __GNUC__ > 3 || __GNUC_MINOR__ > 3
cpu = "pentium-m";
#else
cpu = "pentium3";
#endif
}
else
{
#if __GNUC__ > 3 || __GNUC_MINOR__ > 2
if (strstr(model_name, "Mobile"))
{
cpu = "pentium4m";
}
#endif
if (!cpu)
{
cpu = "pentium4";
}
}
}
}
else
{
cpu = "pentium3";
}
}
else
{
if (!strcmp(cpu_family, "6"))
{
cpu = "pentium2";
}
else
{
cpu = "pentium-mmx";
}
}
}
#endif
if (!cpu)
{
int family = atoi(cpu_family);
if (family > 5)
{
cpu = "pentiumpro";
}
else if (family == 5)
{
cpu = "pentium";
}
}
}
#if __GNUC__ > 2
#if __GNUC__ > 3 || __GNUC_MINOR__ > 2
else if (!strcmp(vendor_id, "CentaurHauls") && strstr(flags, " mmx "))
{
if (strstr(flags, " 3dnow "))
{
if (atoi(cpu_family) > 5)
{
cpu = "c3";
}
else
{
cpu = "winchip2";
}
}
#if __GNUC__ > 3 || __GNUC_MINOR__ > 3
else if (strstr(flags, " sse "))
{
cpu = "c3-2";
}
#endif
if (!cpu)
{
cpu = "winchip-c6";
}
}
#endif
#endif
if (!cpu)
{
int family = atoi(cpu_family);
if (family > 5)
{
cpu = "i686";
}
else if (family == 5)
{
cpu = "i586";
}
else if (family == 4)
{
cpu = "i486";
}
else
{
cpu = "i386";
}
}
puts(cpu);
}
else
{
puts("Could not open /proc/cpuinfo, and CPUID instruction not available.");
}
return(0);
}