/* * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifdef __APPLE__ #include <sys/sysctl.h> #elif defined(__OpenBSD__) #include <sys/param.h> #include <sys/sysctl.h> #include <machine/cpu.h> #elif defined(__AMIGAOS4__) #include <exec/exec.h> #include <interfaces/exec.h> #include <proto/exec.h> #endif /* __APPLE__ */ #include "libavutil/cpu.h" #include "config.h" /** * This function MAY rely on signal() or fork() in order to make sure AltiVec * is present. */ int ff_get_cpu_flags_ppc(void) { #if HAVE_ALTIVEC #ifdef __AMIGAOS4__ ULONG result = 0; extern struct ExecIFace *IExec; IExec->GetCPUInfoTags(GCIT_VectorUnit, &result, TAG_DONE); if (result == VECTORTYPE_ALTIVEC) return AV_CPU_FLAG_ALTIVEC; return 0; #elif defined(__APPLE__) || defined(__OpenBSD__) #ifdef __OpenBSD__ int sels[2] = {CTL_MACHDEP, CPU_ALTIVEC}; #else int sels[2] = {CTL_HW, HW_VECTORUNIT}; #endif int has_vu = 0; size_t len = sizeof(has_vu); int err; err = sysctl(sels, 2, &has_vu, &len, NULL, 0); if (err == 0) return has_vu ? AV_CPU_FLAG_ALTIVEC : 0; return 0; #elif CONFIG_RUNTIME_CPUDETECT int proc_ver; // Support of mfspr PVR emulation added in Linux 2.6.17. __asm__ volatile("mfspr %0, 287" : "=r" (proc_ver)); proc_ver >>= 16; if (proc_ver & 0x8000 || proc_ver == 0x000c || proc_ver == 0x0039 || proc_ver == 0x003c || proc_ver == 0x0044 || proc_ver == 0x0045 || proc_ver == 0x0070) return AV_CPU_FLAG_ALTIVEC; return 0; #else // Since we were compiled for AltiVec, just assume we have it // until someone comes up with a proper way (not involving signal hacks). return AV_CPU_FLAG_ALTIVEC; #endif /* __AMIGAOS4__ */ #endif /* HAVE_ALTIVEC */ return 0; }