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