From 6310eb8010b7a3b3016e297132380cbd4e3d2d10 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 20 May 2014 05:23:52 +0200 Subject: 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 --- libavutil/cpu.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'libavutil/cpu.c') diff --git a/libavutil/cpu.c b/libavutil/cpu.c index c4517bab67..454326cf2c 100644 --- a/libavutil/cpu.c +++ b/libavutil/cpu.c @@ -47,6 +47,26 @@ 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_FMA3 | + AV_CPU_FLAG_FMA4 | + AV_CPU_FLAG_AVX2 )) + && !(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; } -- cgit v1.2.3