Chris@82: /*
Chris@82:  * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@82:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@82:  *
Chris@82:  * This program is free software; you can redistribute it and/or modify
Chris@82:  * it under the terms of the GNU General Public License as published by
Chris@82:  * the Free Software Foundation; either version 2 of the License, or
Chris@82:  * (at your option) any later version.
Chris@82:  *
Chris@82:  * This program is distributed in the hope that it will be useful,
Chris@82:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@82:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@82:  * GNU General Public License for more details.
Chris@82:  *
Chris@82:  * You should have received a copy of the GNU General Public License
Chris@82:  * along with this program; if not, write to the Free Software
Chris@82:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Chris@82:  *
Chris@82:  */
Chris@82: 
Chris@82: 
Chris@82: /* this code was kindly donated by Eric J. Korpela */
Chris@82: 
Chris@82: #ifdef _MSC_VER
Chris@82: #ifndef inline
Chris@82: #define inline __inline
Chris@82: #endif
Chris@82: #endif
Chris@82: 
Chris@82: static inline int is_386() 
Chris@82: {
Chris@82: #ifdef _MSC_VER
Chris@82:     unsigned int result,tst;
Chris@82:     _asm {
Chris@82:         pushfd
Chris@82:         pop eax
Chris@82:         mov edx,eax
Chris@82:         xor eax,40000h
Chris@82:         push eax
Chris@82:         popfd
Chris@82:         pushfd
Chris@82:         pop eax
Chris@82:         push edx
Chris@82:         popfd
Chris@82:         mov tst,edx
Chris@82:         mov result,eax
Chris@82:     }
Chris@82: #else
Chris@82:     register unsigned int result,tst;
Chris@82:     __asm__ (
Chris@82:         "pushfl\n\t"
Chris@82:         "popl %0\n\t"
Chris@82:         "movl %0,%1\n\t"
Chris@82:         "xorl $0x40000,%0\n\t"
Chris@82:         "pushl %0\n\t"
Chris@82:         "popfl\n\t"
Chris@82:         "pushfl\n\t"
Chris@82:         "popl %0\n\t"
Chris@82:         "pushl %1\n\t"
Chris@82:         "popfl"
Chris@82:     : "=r" (result), "=r" (tst) /* output */
Chris@82:     :  /* no inputs */
Chris@82:     );
Chris@82: #endif
Chris@82:     return (result == tst);
Chris@82: }
Chris@82: 
Chris@82: static inline int has_cpuid() 
Chris@82: {
Chris@82: #ifdef _MSC_VER
Chris@82:     unsigned int result,tst;
Chris@82:     _asm {
Chris@82:         pushfd
Chris@82:         pop eax
Chris@82:         mov edx,eax
Chris@82:         xor eax,200000h
Chris@82:         push eax
Chris@82:         popfd
Chris@82:         pushfd
Chris@82:         pop eax
Chris@82:         push edx
Chris@82:         popfd
Chris@82:         mov tst,edx
Chris@82:         mov result,eax
Chris@82:     }
Chris@82: #else
Chris@82:     register unsigned int result,tst;
Chris@82:     __asm__ (
Chris@82:         "pushfl\n\t"
Chris@82:         "pop %0\n\t"
Chris@82:         "movl %0,%1\n\t"
Chris@82:         "xorl $0x200000,%0\n\t"
Chris@82:         "pushl %0\n\t"
Chris@82:         "popfl\n\t"
Chris@82:         "pushfl\n\t"
Chris@82:         "popl %0\n\t"
Chris@82:         "pushl %1\n\t"
Chris@82:         "popfl"
Chris@82:     : "=r" (result), "=r" (tst) /* output */
Chris@82:     : /* no inputs */
Chris@82:     );
Chris@82: #endif
Chris@82:     return (result != tst);
Chris@82: }
Chris@82: 
Chris@82: /* cpuid version to get all registers. Donated by Erik Lindahl from Gromacs. */
Chris@82: static inline void
Chris@82: cpuid_all(int level, int ecxval, int *eax, int *ebx, int *ecx, int *edx)
Chris@82: {
Chris@82: #if (defined _MSC_VER)
Chris@82:     int CPUInfo[4];
Chris@82:     
Chris@82: #    if (_MSC_VER > 1500) || (_MSC_VER == 1500 & _MSC_FULL_VER >= 150030729)
Chris@82:     /* MSVC 9.0 SP1 or later */
Chris@82:     __cpuidex(CPUInfo, level, ecxval);
Chris@82: #    else
Chris@82:     __cpuid(CPUInfo, level);
Chris@82:     /* Set an error code if the user wanted a non-zero ecxval, since we did not have cpuidex */
Chris@82: #    endif
Chris@82:     *eax = CPUInfo[0];
Chris@82:     *ebx = CPUInfo[1];
Chris@82:     *ecx = CPUInfo[2];
Chris@82:     *edx = CPUInfo[3];
Chris@82: 
Chris@82: #else
Chris@82:     /* Not MSVC */
Chris@82:     *eax = level;
Chris@82:     *ecx = ecxval;
Chris@82:     *ebx = 0;
Chris@82:     *edx = 0;
Chris@82:     /* Avoid clobbering global offset table in 32-bit pic code (ebx) */
Chris@82: #    if defined(__PIC__)
Chris@82:     __asm__ ("xchgl %%ebx, %1  \n\t"
Chris@82:              "cpuid            \n\t"
Chris@82:              "xchgl %%ebx, %1  \n\t"
Chris@82:              : "+a" (*eax), "+r" (*ebx), "+c" (*ecx), "+d" (*edx));
Chris@82: #    else
Chris@82:     /* No need to save ebx if we are not in pic mode */
Chris@82:     __asm__ ("cpuid            \n\t"
Chris@82:              : "+a" (*eax), "+b" (*ebx), "+c" (*ecx), "+d" (*edx));
Chris@82: #    endif
Chris@82: #endif
Chris@82: }
Chris@82: 
Chris@82: static inline int cpuid_edx(int op)
Chris@82: {
Chris@82: #    ifdef _MSC_VER
Chris@82:      int result;
Chris@82:      _asm {
Chris@82: 	  push ebx
Chris@82:           mov eax,op
Chris@82:           cpuid
Chris@82:           mov result,edx
Chris@82:           pop ebx
Chris@82:      }
Chris@82:      return result;
Chris@82: #    else
Chris@82:      int eax, ecx, edx;
Chris@82: 
Chris@82:      __asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
Chris@82: 	     : "=a" (eax), "=c" (ecx), "=d" (edx)
Chris@82: 	     : "a" (op));
Chris@82:      return edx;
Chris@82: #    endif
Chris@82: }
Chris@82: 
Chris@82: static inline int cpuid_ecx(int op)
Chris@82: {
Chris@82: #    ifdef _MSC_VER
Chris@82:      int result;
Chris@82:      _asm {
Chris@82: 	  push ebx
Chris@82:           mov eax,op
Chris@82:           cpuid
Chris@82:           mov result,ecx
Chris@82:           pop ebx
Chris@82:      }
Chris@82:      return result;
Chris@82: #    else
Chris@82:      int eax, ecx, edx;
Chris@82: 
Chris@82:      __asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
Chris@82: 	     : "=a" (eax), "=c" (ecx), "=d" (edx)
Chris@82: 	     : "a" (op));
Chris@82:      return ecx;
Chris@82: #    endif
Chris@82: }
Chris@82: 
Chris@82: static inline int xgetbv_eax(int op)
Chris@82: {
Chris@82: #    ifdef _MSC_VER
Chris@82:      int veax, vedx;
Chris@82:      _asm {
Chris@82:           mov ecx,op
Chris@82: #    if defined(__INTEL_COMPILER) || (_MSC_VER >= 1600)
Chris@82:           xgetbv
Chris@82: #    else
Chris@82:           __emit 15
Chris@82:           __emit 1
Chris@82:           __emit 208
Chris@82: #    endif
Chris@82:           mov veax,eax
Chris@82:           mov vedx,edx
Chris@82:      }
Chris@82:      return veax;
Chris@82: #    else
Chris@82:      int eax, edx;
Chris@82:      __asm__ (".byte 0x0f, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c" (op));
Chris@82:      return eax;
Chris@82: #endif
Chris@82: }