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authorMichael Niedermayer <michaelni@gmx.at>2014-05-20 05:23:52 +0200
committerMichael Niedermayer <michaelni@gmx.at>2014-06-23 15:14:41 +0200
commit1930efe236503f5ea97ff6a11125f1da91afa931 (patch)
tree8fb35ac97f3075e07f66d819fbfcf24c88558759
parent033b0a4e7fc86588de76597b3dc21a8b8161bd32 (diff)
downloadffmpeg-1930efe236503f5ea97ff6a11125f1da91afa931.tar.gz
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 <michaelni@gmx.at> (cherry picked from commit 6310eb8010b7a3b3016e297132380cbd4e3d2d10) Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
-rw-r--r--libavutil/cpu.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/libavutil/cpu.c b/libavutil/cpu.c
index f651cab64b..be743ee088 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;
}