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| author | James Almer <jamrial@gmail.com> | 2016-02-07 00:04:59 -0300 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2016-02-07 16:39:21 -0300 |
| commit | be22bd32fe433588f26aad40db971e0154d7f904 (patch) | |
| tree | 3e84b532d588a1417f800a76a9d50e2c59f0473b /libavutil/x86/cpu.c | |
| parent | ba618bde7f1362b4f9456ab40303f1d79d91cccf (diff) | |
| download | ffmpeg-be22bd32fe433588f26aad40db971e0154d7f904.tar.gz | |
x86/cpu: set avxslow cpuflag on btver2 CPUs
They are also slow when using 256 bit wide registers
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'libavutil/x86/cpu.c')
| -rw-r--r-- | libavutil/x86/cpu.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c index f57d72d0a7..bb63daac3d 100644 --- a/libavutil/x86/cpu.c +++ b/libavutil/x86/cpu.c @@ -182,13 +182,11 @@ int ff_get_cpu_flags_x86(void) /* Similar to the above but for AVX functions on AMD processors. This is necessary only for functions using YMM registers on Bulldozer - based CPUs as they lack 256-bits execution units. SSE/AVX functions - using XMM registers are always faster on them. + and Jaguar based CPUs as they lack 256-bits execution units. SSE/AVX + functions using XMM registers are always faster on them. AV_CPU_FLAG_AVX and AV_CPU_FLAG_AVXSLOW are both set so that AVX is - used unless explicitly disabled by checking AV_CPU_FLAG_AVXSLOW. - TODO: Confirm if Excavator is affected or not by this once it's - released, and update the check if necessary. Same for btver2. */ - if (family == 0x15 && (rval & AV_CPU_FLAG_AVX)) + used unless explicitly disabled by checking AV_CPU_FLAG_AVXSLOW. */ + if ((family == 0x15 || family == 0x16) && (rval & AV_CPU_FLAG_AVX)) rval |= AV_CPU_FLAG_AVXSLOW; } |