cannam@127: /*
cannam@127:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@127:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@127:  *
cannam@127:  * This program is free software; you can redistribute it and/or modify
cannam@127:  * it under the terms of the GNU General Public License as published by
cannam@127:  * the Free Software Foundation; either version 2 of the License, or
cannam@127:  * (at your option) any later version.
cannam@127:  *
cannam@127:  * This program is distributed in the hope that it will be useful,
cannam@127:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@127:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@127:  * GNU General Public License for more details.
cannam@127:  *
cannam@127:  * You should have received a copy of the GNU General Public License
cannam@127:  * along with this program; if not, write to the Free Software
cannam@127:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@127:  *
cannam@127:  */
cannam@127: 
cannam@127: 
cannam@127: /* this code was kindly donated by Eric J. Korpela */
cannam@127: 
cannam@127: #ifdef _MSC_VER
cannam@127: #ifndef inline
cannam@127: #define inline __inline
cannam@127: #endif
cannam@127: #endif
cannam@127: 
cannam@127: static inline int is_386() 
cannam@127: {
cannam@127: #ifdef _MSC_VER
cannam@127:     unsigned int result,tst;
cannam@127:     _asm {
cannam@127:         pushfd
cannam@127:         pop eax
cannam@127:         mov edx,eax
cannam@127:         xor eax,40000h
cannam@127:         push eax
cannam@127:         popfd
cannam@127:         pushfd
cannam@127:         pop eax
cannam@127:         push edx
cannam@127:         popfd
cannam@127:         mov tst,edx
cannam@127:         mov result,eax
cannam@127:     }
cannam@127: #else
cannam@127:     register unsigned int result,tst;
cannam@127:     __asm__ (
cannam@127:         "pushfl\n\t"
cannam@127:         "popl %0\n\t"
cannam@127:         "movl %0,%1\n\t"
cannam@127:         "xorl $0x40000,%0\n\t"
cannam@127:         "pushl %0\n\t"
cannam@127:         "popfl\n\t"
cannam@127:         "pushfl\n\t"
cannam@127:         "popl %0\n\t"
cannam@127:         "pushl %1\n\t"
cannam@127:         "popfl"
cannam@127:     : "=r" (result), "=r" (tst) /* output */
cannam@127:     :  /* no inputs */
cannam@127:     );
cannam@127: #endif
cannam@127:     return (result == tst);
cannam@127: }
cannam@127: 
cannam@127: static inline int has_cpuid() 
cannam@127: {
cannam@127: #ifdef _MSC_VER
cannam@127:     unsigned int result,tst;
cannam@127:     _asm {
cannam@127:         pushfd
cannam@127:         pop eax
cannam@127:         mov edx,eax
cannam@127:         xor eax,200000h
cannam@127:         push eax
cannam@127:         popfd
cannam@127:         pushfd
cannam@127:         pop eax
cannam@127:         push edx
cannam@127:         popfd
cannam@127:         mov tst,edx
cannam@127:         mov result,eax
cannam@127:     }
cannam@127: #else
cannam@127:     register unsigned int result,tst;
cannam@127:     __asm__ (
cannam@127:         "pushfl\n\t"
cannam@127:         "pop %0\n\t"
cannam@127:         "movl %0,%1\n\t"
cannam@127:         "xorl $0x200000,%0\n\t"
cannam@127:         "pushl %0\n\t"
cannam@127:         "popfl\n\t"
cannam@127:         "pushfl\n\t"
cannam@127:         "popl %0\n\t"
cannam@127:         "pushl %1\n\t"
cannam@127:         "popfl"
cannam@127:     : "=r" (result), "=r" (tst) /* output */
cannam@127:     : /* no inputs */
cannam@127:     );
cannam@127: #endif
cannam@127:     return (result != tst);
cannam@127: }
cannam@127: 
cannam@127: /* cpuid version to get all registers. Donated by Erik Lindahl from Gromacs. */
cannam@127: static inline void
cannam@127: cpuid_all(int level, int ecxval, int *eax, int *ebx, int *ecx, int *edx)
cannam@127: {
cannam@127: #if (defined _MSC_VER)
cannam@127:     int CPUInfo[4];
cannam@127:     
cannam@127: #    if (_MSC_VER > 1500) || (_MSC_VER == 1500 & _MSC_FULL_VER >= 150030729)
cannam@127:     /* MSVC 9.0 SP1 or later */
cannam@127:     __cpuidex(CPUInfo, level, ecxval);
cannam@127:     rc = 0;
cannam@127: #    else
cannam@127:     __cpuid(CPUInfo, level);
cannam@127:     /* Set an error code if the user wanted a non-zero ecxval, since we did not have cpuidex */
cannam@127:     rc = (ecxval > 0) ? -1 : 0;
cannam@127: #    endif
cannam@127:     *eax = CPUInfo[0];
cannam@127:     *ebx = CPUInfo[1];
cannam@127:     *ecx = CPUInfo[2];
cannam@127:     *edx = CPUInfo[3];
cannam@127: 
cannam@127: #else
cannam@127:     /* Not MSVC */
cannam@127:     *eax = level;
cannam@127:     *ecx = ecxval;
cannam@127:     *ebx = 0;
cannam@127:     *edx = 0;
cannam@127:     /* Avoid clobbering global offset table in 32-bit pic code (ebx) */
cannam@127: #    if defined(__PIC__)
cannam@127:     __asm__ ("xchgl %%ebx, %1  \n\t"
cannam@127:              "cpuid            \n\t"
cannam@127:              "xchgl %%ebx, %1  \n\t"
cannam@127:              : "+a" (*eax), "+r" (*ebx), "+c" (*ecx), "+d" (*edx));
cannam@127: #    else
cannam@127:     /* No need to save ebx if we are not in pic mode */
cannam@127:     __asm__ ("cpuid            \n\t"
cannam@127:              : "+a" (*eax), "+b" (*ebx), "+c" (*ecx), "+d" (*edx));
cannam@127: #    endif
cannam@127: #endif
cannam@127: }
cannam@127: 
cannam@127: static inline int cpuid_edx(int op)
cannam@127: {
cannam@127: #    ifdef _MSC_VER
cannam@127:      int result;
cannam@127:      _asm {
cannam@127: 	  push ebx
cannam@127:           mov eax,op
cannam@127:           cpuid
cannam@127:           mov result,edx
cannam@127:           pop ebx
cannam@127:      }
cannam@127:      return result;
cannam@127: #    else
cannam@127:      int eax, ecx, edx;
cannam@127: 
cannam@127:      __asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
cannam@127: 	     : "=a" (eax), "=c" (ecx), "=d" (edx)
cannam@127: 	     : "a" (op));
cannam@127:      return edx;
cannam@127: #    endif
cannam@127: }
cannam@127: 
cannam@127: static inline int cpuid_ecx(int op)
cannam@127: {
cannam@127: #    ifdef _MSC_VER
cannam@127:      int result;
cannam@127:      _asm {
cannam@127: 	  push ebx
cannam@127:           mov eax,op
cannam@127:           cpuid
cannam@127:           mov result,ecx
cannam@127:           pop ebx
cannam@127:      }
cannam@127:      return result;
cannam@127: #    else
cannam@127:      int eax, ecx, edx;
cannam@127: 
cannam@127:      __asm__("push %%ebx\n\tcpuid\n\tpop %%ebx"
cannam@127: 	     : "=a" (eax), "=c" (ecx), "=d" (edx)
cannam@127: 	     : "a" (op));
cannam@127:      return ecx;
cannam@127: #    endif
cannam@127: }
cannam@127: 
cannam@127: static inline int xgetbv_eax(int op)
cannam@127: {
cannam@127: #    ifdef _MSC_VER
cannam@127:      int veax, vedx;
cannam@127:      _asm {
cannam@127:           mov ecx,op
cannam@127: #    if defined(__INTEL_COMPILER) || (_MSC_VER >= 1600)
cannam@127:           xgetbv
cannam@127: #    else
cannam@127:           __emit 15
cannam@127:           __emit 1
cannam@127:           __emit 208
cannam@127: #    endif
cannam@127:           mov veax,eax
cannam@127:           mov vedx,edx
cannam@127:      }
cannam@127:      return veax;
cannam@127: #    else
cannam@127:      int eax, edx;
cannam@127:      __asm__ (".byte 0x0f, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c" (op));
cannam@127:      return eax;
cannam@127: #endif
cannam@127: }