furnace/extern/fftw/simd-support/x86-cpuid.h

213 lines
4.7 KiB
C

/*
* Copyright (c) 2003, 2007-14 Matteo Frigo
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/* this code was kindly donated by Eric J. Korpela */
#ifdef _MSC_VER
#include <intrin.h>
#ifndef inline
#define inline __inline
#endif
#endif
static inline int is_386()
{
#ifdef _MSC_VER
unsigned int result,tst;
_asm {
pushfd
pop eax
mov edx,eax
xor eax,40000h
push eax
popfd
pushfd
pop eax
push edx
popfd
mov tst,edx
mov result,eax
}
#else
register unsigned int result,tst;
__asm__ (
"pushfl\n\t"
"popl %0\n\t"
"movl %0,%1\n\t"
"xorl $0x40000,%0\n\t"
"pushl %0\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"pushl %1\n\t"
"popfl"
: "=r" (result), "=r" (tst) /* output */
: /* no inputs */
);
#endif
return (result == tst);
}
static inline int has_cpuid()
{
#ifdef _MSC_VER
unsigned int result,tst;
_asm {
pushfd
pop eax
mov edx,eax
xor eax,200000h
push eax
popfd
pushfd
pop eax
push edx
popfd
mov tst,edx
mov result,eax
}
#else
register unsigned int result,tst;
__asm__ (
"pushfl\n\t"
"pop %0\n\t"
"movl %0,%1\n\t"
"xorl $0x200000,%0\n\t"
"pushl %0\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"pushl %1\n\t"
"popfl"
: "=r" (result), "=r" (tst) /* output */
: /* no inputs */
);
#endif
return (result != tst);
}
/* cpuid version to get all registers. Donated by Erik Lindahl from Gromacs. */
static inline void
cpuid_all(int level, int ecxval, int *eax, int *ebx, int *ecx, int *edx)
{
#if (defined _MSC_VER)
int CPUInfo[4];
# if (_MSC_VER > 1500) || (_MSC_VER == 1500 & _MSC_FULL_VER >= 150030729)
/* MSVC 9.0 SP1 or later */
__cpuidex(CPUInfo, level, ecxval);
# else
__cpuid(CPUInfo, level);
/* Set an error code if the user wanted a non-zero ecxval, since we did not have cpuidex */
# endif
*eax = CPUInfo[0];
*ebx = CPUInfo[1];
*ecx = CPUInfo[2];
*edx = CPUInfo[3];
#else
/* Not MSVC */
*eax = level;
*ecx = ecxval;
*ebx = 0;
*edx = 0;
/* Avoid clobbering global offset table in 32-bit pic code (ebx) */
# if defined(__PIC__)
__asm__ ("xchgl %%ebx, %1 \n\t"
"cpuid \n\t"
"xchgl %%ebx, %1 \n\t"
: "+a" (*eax), "+r" (*ebx), "+c" (*ecx), "+d" (*edx));
# else
/* No need to save ebx if we are not in pic mode */
__asm__ ("cpuid \n\t"
: "+a" (*eax), "+b" (*ebx), "+c" (*ecx), "+d" (*edx));
# endif
#endif
}
static inline int cpuid_edx(int op)
{
# ifdef _MSC_VER
int result;
_asm {
push ebx
mov eax,op
cpuid
mov result,edx
pop ebx
}
return result;
# else
int eax, ecx, edx;
__asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
: "=a" (eax), "=c" (ecx), "=d" (edx)
: "a" (op));
return edx;
# endif
}
static inline int cpuid_ecx(int op)
{
# ifdef _MSC_VER
int result;
_asm {
push ebx
mov eax,op
cpuid
mov result,ecx
pop ebx
}
return result;
# else
int eax, ecx, edx;
__asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
: "=a" (eax), "=c" (ecx), "=d" (edx)
: "a" (op));
return ecx;
# endif
}
static inline int xgetbv_eax(int op)
{
# ifdef _MSC_VER
int veax, vedx;
_asm {
mov ecx,op
# if defined(__INTEL_COMPILER) || (_MSC_VER >= 1600)
xgetbv
# else
__emit 15
__emit 1
__emit 208
# endif
mov veax,eax
mov vedx,edx
}
return veax;
# else
int eax, edx;
__asm__ (".byte 0x0f, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c" (op));
return eax;
#endif
}