repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * This file is part of FFmpeg. | |
| 3 | * | |
| 4 | * FFmpeg is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU Lesser General Public | |
| 6 | * License as published by the Free Software Foundation; either | |
| 7 | * version 2.1 of the License, or (at your option) any later version. | |
| 8 | * | |
| 9 | * FFmpeg is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * Lesser General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU Lesser General Public | |
| 15 | * License along with FFmpeg; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | */ | |
| 18 | ||
| 19 | #ifdef __APPLE__ | |
| 20 | #include <sys/sysctl.h> | |
| 21 | #elif defined(__OpenBSD__) | |
| 22 | #include <sys/param.h> | |
| 23 | #include <sys/sysctl.h> | |
| 24 | #include <machine/cpu.h> | |
| 25 | #elif defined(__AMIGAOS4__) | |
| 26 | #include <exec/exec.h> | |
| 27 | #include <interfaces/exec.h> | |
| 28 | #include <proto/exec.h> | |
| 29 | #endif /* __APPLE__ */ | |
| 30 | ||
| 31 | #include "libavutil/cpu.h" | |
| 32 | #include "libavutil/cpu_internal.h" | |
| 33 | #include "config.h" | |
| 34 | ||
| 35 | /** | |
| 36 | * This function MAY rely on signal() or fork() in order to make sure AltiVec | |
| 37 | * is present. | |
| 38 | */ | |
| 39 | int ff_get_cpu_flags_ppc(void) | |
| 40 | { | |
| 41 | #if HAVE_ALTIVEC | |
| 42 | #ifdef __AMIGAOS4__ | |
| 43 | ULONG result = 0; | |
| 44 | extern struct ExecIFace *IExec; | |
| 45 | ||
| 46 | IExec->GetCPUInfoTags(GCIT_VectorUnit, &result, TAG_DONE); | |
| 47 | if (result == VECTORTYPE_ALTIVEC) | |
| 48 | return AV_CPU_FLAG_ALTIVEC; | |
| 49 | return 0; | |
| 50 | #elif defined(__APPLE__) || defined(__OpenBSD__) | |
| 51 | #ifdef __OpenBSD__ | |
| 52 | int sels[2] = {CTL_MACHDEP, CPU_ALTIVEC}; | |
| 53 | #else | |
| 54 | int sels[2] = {CTL_HW, HW_VECTORUNIT}; | |
| 55 | #endif | |
| 56 | int has_vu = 0; | |
| 57 | size_t len = sizeof(has_vu); | |
| 58 | int err; | |
| 59 | ||
| 60 | err = sysctl(sels, 2, &has_vu, &len, NULL, 0); | |
| 61 | ||
| 62 | if (err == 0) | |
| 63 | return has_vu ? AV_CPU_FLAG_ALTIVEC : 0; | |
| 64 | return 0; | |
| 65 | #elif CONFIG_RUNTIME_CPUDETECT && defined(__linux__) && !ARCH_PPC64 | |
| 66 | int proc_ver; | |
| 67 | // Support of mfspr PVR emulation added in Linux 2.6.17. | |
| 68 | __asm__ volatile("mfspr %0, 287" : "=r" (proc_ver)); | |
| 69 | proc_ver >>= 16; | |
| 70 | if (proc_ver & 0x8000 || | |
| 71 | proc_ver == 0x000c || | |
| 72 | proc_ver == 0x0039 || proc_ver == 0x003c || | |
| 73 | proc_ver == 0x0044 || proc_ver == 0x0045 || | |
| 74 | proc_ver == 0x0070) | |
| 75 | return AV_CPU_FLAG_ALTIVEC; | |
| 76 | return 0; | |
| 77 | #else | |
| 78 | // Since we were compiled for AltiVec, just assume we have it | |
| 79 | // until someone comes up with a proper way (not involving signal hacks). | |
| 80 | return AV_CPU_FLAG_ALTIVEC; | |
| 81 | #endif /* __AMIGAOS4__ */ | |
| 82 | #endif /* HAVE_ALTIVEC */ | |
| 83 | return 0; | |
| 84 | } |