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libavutil/ppc: Remove mfspr-based AltiVec detection code for Linux

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The getauxval() and auxv methods cover the last 25+ years of Linux.

Signed-off-by: Brad Smith <brad@comstyle.com>
This commit is contained in:
Brad Smith
2026-03-31 00:22:06 -04:00
committed by brad
parent ddcb9dd3b5
commit e64a1d2953
1 changed files with 0 additions and 33 deletions
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33
libavutil/ppc/cpu.c
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@@ -134,39 +134,6 @@ int ff_get_cpu_flags_ppc(void)
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).