From e68114868ffdca34694345599db2c452d7f54a94 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 20 May 2014 05:23:52 +0200 Subject: [PATCH] avutil/cpu: force mmx on selection of higher x86 SIMD features Fixes various runtime failures with manually set flags that represent no existing CPU Fixes Ticket3653 Signed-off-by: Michael Niedermayer (cherry picked from commit 6310eb8010b7a3b3016e297132380cbd4e3d2d10) Signed-off-by: Michael Niedermayer --- libavutil/cpu.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/libavutil/cpu.c b/libavutil/cpu.c index a1d1547033..85bc2d6499 100644 --- a/libavutil/cpu.c +++ b/libavutil/cpu.c @@ -23,6 +23,24 @@ static int flags, checked; void av_force_cpu_flags(int arg){ + if ( (arg & ( AV_CPU_FLAG_3DNOW | + AV_CPU_FLAG_3DNOWEXT | + AV_CPU_FLAG_SSE | + AV_CPU_FLAG_SSE2 | + AV_CPU_FLAG_SSE2SLOW | + AV_CPU_FLAG_SSE3 | + AV_CPU_FLAG_SSE3SLOW | + AV_CPU_FLAG_SSSE3 | + AV_CPU_FLAG_SSE4 | + AV_CPU_FLAG_SSE42 | + AV_CPU_FLAG_AVX | + AV_CPU_FLAG_XOP | + AV_CPU_FLAG_FMA4 )) + && !(arg & AV_CPU_FLAG_MMX)) { + av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n"); + arg |= AV_CPU_FLAG_MMX; + } + flags = arg; checked = arg != -1; }