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#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#ifndef WIN32
#include <unistd.h>
#endif
#include <string.h>
#include "hardware.h"
#define PLL_FEAT_AVAIL(x,y) (((x) & (y)) == (y))
#define PLL_SYS_CPU_DIR_PATH "/sys/devices/system/cpu/"
//#ifdef _MSC_VER
//#define inline __inline
//#endif
static __inline void cpuid(unsigned int op, int count,
unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
#ifdef WIN32
__int32 regs[4];
__cpuid((int*)regs, (int)op);
*eax = regs[0];
*ebx = regs[1];
*ecx = regs[2];
*edx = regs[3];
#else
*eax = op;
*ecx = count;
asm volatile("cpuid"
: "=a" (*eax),
"=b" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "0" (*eax), "2" (*ecx)
: "memory");
#endif
}
void show_hardware_info(pllHardwareInfo * hw)
{
printf ("MMX.........: %d\n"
"SSE.........: %d\n"
"SSE2........: %d\n"
"SSE3........: %d\n"
"SSSE3.......: %d\n"
"FMA.........: %d\n"
"SSE4.1......: %d\n"
"SSE4.2......: %d\n"
"AVX.........: %d\n"
"AVX2........: %d\n"
"SSE4A.......: %d\n"
"FMA4........: %d\n\n"
"Core(s).....: %d\n"
"CPU Sockets.: %d\n",
hw->has_mmx, hw->has_sse, hw->has_sse2, hw->has_sse3, hw->has_ssse3,
hw->has_fma, hw->has_sse41, hw->has_sse42, hw->has_avx, hw->has_avx2,
hw->has_sse4a, hw->has_fma4, hw->cores, hw->cpu_sockets);
}
static int pll_probe_cpu (pllHardwareInfo * hw)
{
struct stat cpustat;
char cpu[30];
char cpupath[100];
int i, id, max_physical_id = -1;
char * physical_id_path = "/topology/physical_package_id";
FILE * fd;
/* check whether the sys cpu dir exists */
if (stat(PLL_SYS_CPU_DIR_PATH, &cpustat)) return (0);
/* and also check whether it is a dir */
if (!S_ISDIR(cpustat.st_mode)) return (0);
/* detect number of processors */
for (i = 0; ; ++i)
{
sprintf(cpu, "cpu%d", i);
strcpy (cpupath, PLL_SYS_CPU_DIR_PATH);
strcat (cpupath, cpu);
if (stat(cpupath, &cpustat)) break;
strcat (cpupath, physical_id_path);
if (!stat(cpupath, &cpustat))
{
fd = fopen (cpupath,"r");
fscanf (fd, "%d", &id);
/* printf ("Detected processor %d belonging to package %d\n", i, id); */
if (id > max_physical_id) max_physical_id = id;
fclose (fd);
}
}
hw->cores = i;
hw->cpu_sockets = max_physical_id + 1;
return (1);
}
static void pll_probe_hardware (pllHardwareInfo * hw)
{
unsigned int a, b, c, d;
c = 0;
cpuid(0,0,&a,&b,&c,&d);
*((unsigned int *)(hw->vendor) ) = b;
*((unsigned int *)(hw->vendor + 4)) = d;
*((unsigned int *)(hw->vendor + 8)) = c;
hw->vendor[12] = 0;
printf ("%s\n", hw->vendor);
cpuid(1,0,&a,&b,&c,&d);
hw->has_mmx = PLL_FEAT_AVAIL(d,PLL_HAS_MMX);
hw->has_sse = PLL_FEAT_AVAIL(d,PLL_HAS_SSE);
hw->has_sse2 = PLL_FEAT_AVAIL(d,PLL_HAS_SSE2);
hw->has_sse3 = PLL_FEAT_AVAIL(c,PLL_HAS_SSE3);
hw->has_ssse3 = PLL_FEAT_AVAIL(c,PLL_HAS_SSSE3);
hw->has_fma = PLL_FEAT_AVAIL(c,PLL_HAS_FMA);
hw->has_sse41 = PLL_FEAT_AVAIL(c,PLL_HAS_SSE41);
hw->has_sse42 = PLL_FEAT_AVAIL(c,PLL_HAS_SSE42);
hw->has_avx = PLL_FEAT_AVAIL(c,PLL_HAS_AVX);
cpuid(7,0,&a,&b,&c,&d);
hw->has_avx2 = PLL_FEAT_AVAIL(b,PLL_HAS_AVX2);
/* TODO: note, here we have to check whether leaf 0x80000001 exists */
cpuid(0x80000001,0,&a,&b,&c,&d);
hw->has_sse4a = PLL_FEAT_AVAIL(c,PLL_HAS_SSE4A);
hw->has_fma4 = PLL_FEAT_AVAIL(c,PLL_HAS_FMA4);
}
int pllGetHardwareInfo (pllHardwareInfo * hw)
{
pll_probe_hardware (hw);
pll_probe_cpu (hw);
/* TODO: finish failure checks in probe_hardware and probe_cpu */
return (1);
}
/* TODO: Remove after testing */
/*
int main (int argc, char * argv[])
{
pllHardwareInfo hw;
pll_probe_hardware(&hw);
pll_probe_cpu(&hw);
show_hardware_info(&hw);
return (EXIT_SUCCESS);
}
*/
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