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Code Issues Releases Activity

libavutil/ppc: Include the hardware feature flags like the other archs

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Also include the hardware feature flags like the other archs do and
clean up the code a bit.

Tested on Linux POWER9.

Signed-off-by: Brad Smith <brad@comstyle.com>
This commit is contained in:
Brad Smith 2024-10-21 11:57:44 -04:00
parent d724584d68
commit d6b2d08fc7
1 changed files with 17 additions and 18 deletions
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35
libavutil/ppc/cpu.c
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@ -46,6 +46,17 @@
#include "libavutil/cpu.h"
#include "libavutil/cpu_internal.h"
#ifndef AT_HWCAP
#define AT_HWCAP 16
#endif
#ifndef AT_HWCAP2
#define AT_HWCAP2 26
#endif
#define HWCAP_PPC_VSX (1 << 7)
#define HWCAP_PPC_ALTIVEC (1 << 28)
#define HWCAP2_PPC_ARCH_2_07 (1 << 31)
/**
* This function MAY rely on signal() or fork() in order to make sure AltiVec
* is present.
@ -65,20 +76,14 @@ int ff_get_cpu_flags_ppc(void)
int flags = 0;
unsigned long hwcap = ff_getauxval(AT_HWCAP);
#ifdef PPC_FEATURE2_ARCH_2_07
unsigned long hwcap2 = ff_getauxval(AT_HWCAP2);
#endif
if (hwcap & PPC_FEATURE_HAS_ALTIVEC)
if (hwcap & HWCAP_PPC_ALTIVEC)
flags |= AV_CPU_FLAG_ALTIVEC;
#ifdef PPC_FEATURE_HAS_VSX
if (hwcap & PPC_FEATURE_HAS_VSX)
if (hwcap & HWCAP_PPC_VSX)
flags |= AV_CPU_FLAG_VSX;
#endif
#ifdef PPC_FEATURE2_ARCH_2_07
if (hwcap2 & PPC_FEATURE2_ARCH_2_07)
if (hwcap2 & HWCAP2_PPC_ARCH_2_07)
flags |= AV_CPU_FLAG_POWER8;
#endif
return flags;
#elif defined(__APPLE__) || defined(__NetBSD__) || defined(__OpenBSD__)
@ -112,23 +117,17 @@ int ff_get_cpu_flags_ppc(void)
if (buf[i] == AT_NULL)
goto out;
if (buf[i] == AT_HWCAP) {
if (buf[i + 1] & PPC_FEATURE_HAS_ALTIVEC)
if (buf[i + 1] & HWCAP_PPC_ALTIVEC)
ret = AV_CPU_FLAG_ALTIVEC;
#ifdef PPC_FEATURE_HAS_VSX
if (buf[i + 1] & PPC_FEATURE_HAS_VSX)
if (buf[i + 1] & HWCAP_PPC_VSX)
ret |= AV_CPU_FLAG_VSX;
#endif
if (ret & AV_CPU_FLAG_VSX)
av_assert0(ret & AV_CPU_FLAG_ALTIVEC);
}
#ifdef AT_HWCAP2 /* not introduced until glibc 2.18 */
else if (buf[i] == AT_HWCAP2) {
#ifdef PPC_FEATURE2_ARCH_2_07
if (buf[i + 1] & PPC_FEATURE2_ARCH_2_07)
if (buf[i + 1] & HWCAP2_PPC_ARCH_2_07)
ret |= AV_CPU_FLAG_POWER8;
#endif
}
#endif /* AT_HWCAP2 */
}
}