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ffmpeg-x86-mathops.patch
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File ffmpeg-x86-mathops.patch of Package A_tw-ffmpeg-2
diff -rup a/libavcodec/x86/mathops.h b/libavcodec/x86/mathops.h --- a/libavcodec/x86/mathops.h 2023-10-01 13:02:26.829463017 +0200 +++ b/libavcodec/x86/mathops.h 2023-10-01 13:05:19.219502582 +0200 @@ -35,12 +35,20 @@ static av_always_inline av_const int MULL(int a, int b, unsigned shift) { int rt, dummy; + if (__builtin_constant_p(shift)) __asm__ ( "imull %3 \n\t" "shrdl %4, %%edx, %%eax \n\t" :"=a"(rt), "=d"(dummy) - :"a"(a), "rm"(b), "ci"((uint8_t)shift) + :"a"(a), "rm"(b), "i"(shift & 0x1F) ); + else + __asm__ ( + "imull %3 \n\t" + "shrdl %4, %%edx, %%eax \n\t" + :"=a"(rt), "=d"(dummy) + :"a"(a), "rm"(b), "c"((uint8_t)shift) + ); return rt; } @@ -113,19 +121,31 @@ __asm__ volatile(\ // avoid +32 for shift optimization (gcc should do that ...) #define NEG_SSR32 NEG_SSR32 static inline int32_t NEG_SSR32( int32_t a, int8_t s){ + if (__builtin_constant_p(s)) __asm__ ("sarl %1, %0\n\t" : "+r" (a) - : "ic" ((uint8_t)(-s)) + : "i" (-s & 0x1F) ); + else + __asm__ ("sarl %1, %0\n\t" + : "+r" (a) + : "c" ((uint8_t)(-s)) + ); return a; } #define NEG_USR32 NEG_USR32 static inline uint32_t NEG_USR32(uint32_t a, int8_t s){ + if (__builtin_constant_p(s)) __asm__ ("shrl %1, %0\n\t" : "+r" (a) - : "ic" ((uint8_t)(-s)) + : "i" (-s & 0x1F) ); + else + __asm__ ("shrl %1, %0\n\t" + : "+r" (a) + : "c" ((uint8_t)(-s)) + ); return a; }
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