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ppc: cpu: Add support for VSX and POWER8 extensions

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This commit is contained in:
Luca Barbato 2015-05-10 04:15:59 +02:00
parent da60b99a88
commit 7d07ee5a9b
3 changed files with 21 additions and 3 deletions
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2
libavutil/cpu.h
View File

@ -54,6 +54,8 @@
#define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2
#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
#define AV_CPU_FLAG_VSX 0x0002 ///< ISA 2.06
#define AV_CPU_FLAG_POWER8 0x0004 ///< ISA 2.07
#define AV_CPU_FLAG_ARMV5TE (1 << 0)
#define AV_CPU_FLAG_ARMV6 (1 << 1)

20
libavutil/ppc/cpu.c
View File

@ -85,6 +85,14 @@ int ff_get_cpu_flags_ppc(void)
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
#ifdef PPC_FEATURE_ARCH_2_07
if (buf[i + 1] & PPC_FEATURE_HAS_POWER8)
ret |= AV_CPU_FLAG_POWER8;
#endif
goto out;
}
}
@ -103,7 +111,7 @@ out:
#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));
@ -118,8 +126,14 @@ out:
proc_ver == PVR_POWER7 ||
proc_ver == PVR_POWER8 ||
proc_ver == PVR_CELL_PPU)
return AV_CPU_FLAG_ALTIVEC;
return 0;
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).

2
libavutil/ppc/cpu.h
View File

@ -24,5 +24,7 @@
#include "libavutil/cpu_internal.h"
#define PPC_ALTIVEC(flags) CPUEXT(flags, ALTIVEC)
#define PPC_VSX(flags) CPUEXT(flags, VSX)
#define PPC_POWER8(flags) CPUEXT(flags, POWER8)
#endif /* AVUTIL_PPC_CPU_H */