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ARM: optimised MAC64 and MLS64 

Originally committed as revision 14245 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2008-07-15 19:06:32 +00:00
parent 6865e04620
commit b0367ef00a
1 changed files with 10 additions and 0 deletions
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10
libavcodec/armv4l/mathops.h
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@ -57,6 +57,16 @@ static inline av_const int64_t MUL64(int a, int b)
}
#define MUL64 MUL64
static inline av_const int64_t MAC64(int64_t d, int a, int b)
{
union { uint64_t x; unsigned hl[2]; } x = { d };
asm ("smlal %0, %1, %2, %3"
: "+r"(x.hl[0]), "+r"(x.hl[1]) : "r"(a), "r"(b));
return x.x;
}
#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
#define MLS64(d, a, b) MAC64(d, -(a), b)
#if defined(HAVE_ARMV5TE)
/* signed 16x16 -> 32 multiply add accumulate */