162 lines
4.5 KiB
C
Executable file
162 lines
4.5 KiB
C
Executable file
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef __APPLE__
|
|
#include <sys/sysctl.h>
|
|
#elif defined(__linux__)
|
|
#include <asm/cputable.h>
|
|
#include <linux/auxvec.h>
|
|
#include <fcntl.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#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/avassert.h"
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/cpu_internal.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 defined(__linux__)
|
|
// The linux kernel could have the altivec support disabled
|
|
// even if the cpu has it.
|
|
int i, ret = 0;
|
|
int fd = open("/proc/self/auxv", O_RDONLY);
|
|
unsigned long buf[64] = { 0 };
|
|
ssize_t count;
|
|
|
|
if (fd < 0)
|
|
return 0;
|
|
|
|
while ((count = read(fd, buf, sizeof(buf))) > 0) {
|
|
for (i = 0; i < count / sizeof(*buf); i += 2) {
|
|
if (buf[i] == AT_NULL)
|
|
goto out;
|
|
if (buf[i] == AT_HWCAP) {
|
|
if (buf[i + 1] & PPC_FEATURE_HAS_ALTIVEC)
|
|
ret = AV_CPU_FLAG_ALTIVEC;
|
|
#ifdef PPC_FEATURE_HAS_VSX
|
|
if (buf[i + 1] & PPC_FEATURE_HAS_VSX)
|
|
ret |= AV_CPU_FLAG_VSX;
|
|
#endif
|
|
if (ret & AV_CPU_FLAG_VSX)
|
|
av_assert0(ret & AV_CPU_FLAG_ALTIVEC);
|
|
} else if (buf[i] == AT_HWCAP2) {
|
|
#ifdef PPC_FEATURE2_ARCH_2_07
|
|
if (buf[i + 1] & PPC_FEATURE2_ARCH_2_07)
|
|
ret |= AV_CPU_FLAG_POWER8;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
close(fd);
|
|
return ret;
|
|
#elif CONFIG_RUNTIME_CPUDETECT && defined(__linux__)
|
|
#define PVR_G4_7400 0x000C
|
|
#define PVR_G5_970 0x0039
|
|
#define PVR_G5_970FX 0x003C
|
|
#define PVR_G5_970MP 0x0044
|
|
#define PVR_G5_970GX 0x0045
|
|
#define PVR_POWER6 0x003E
|
|
#define PVR_POWER7 0x003F
|
|
#define PVR_POWER8 0x004B
|
|
#define PVR_CELL_PPU 0x0070
|
|
int ret = 0;
|
|
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 == PVR_G4_7400 ||
|
|
proc_ver == PVR_G5_970 ||
|
|
proc_ver == PVR_G5_970FX ||
|
|
proc_ver == PVR_G5_970MP ||
|
|
proc_ver == PVR_G5_970GX ||
|
|
proc_ver == PVR_POWER6 ||
|
|
proc_ver == PVR_POWER7 ||
|
|
proc_ver == PVR_POWER8 ||
|
|
proc_ver == PVR_CELL_PPU)
|
|
ret = AV_CPU_FLAG_ALTIVEC;
|
|
if (proc_ver == PVR_POWER7 ||
|
|
proc_ver == PVR_POWER8)
|
|
ret |= AV_CPU_FLAG_VSX;
|
|
if (proc_ver == PVR_POWER8)
|
|
ret |= AV_CPU_FLAG_POWER8;
|
|
|
|
return ret;
|
|
#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;
|
|
}
|
|
|
|
size_t ff_get_cpu_max_align_ppc(void)
|
|
{
|
|
int flags = av_get_cpu_flags();
|
|
|
|
if (flags & (AV_CPU_FLAG_ALTIVEC |
|
|
AV_CPU_FLAG_VSX |
|
|
AV_CPU_FLAG_POWER8))
|
|
return 16;
|
|
|
|
return 8;
|
|
}
|