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MUL* for ARM code based on a patch by Siarhei Siamashka

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Originally committed as revision 6050 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-08-22 13:25:09 +00:00
parent f617adedc8
commit 69fd15f871
1 changed files with 11 additions and 0 deletions
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11
libavcodec/mpegaudiodec.c
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@ -55,6 +55,17 @@
({ int64_t rt; asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb)); rt; })
# define MULH(ra, rb) \
({ int rt, dummy; asm ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" (ra), "rm" (rb)); rt; })
#elif defined(ARCH_ARMV4L)
# define MULL(a, b) \
({ int lo, hi;\
asm("smull %0, %1, %2, %3 \n\t"\
"mov %0, %0, lsr #%4\n\t"\
"add %1, %0, %1, lsl #%5\n\t"\
: "=r"(lo), "=r"(hi)\
: "r"(b), "r"(a), "i"(FRAC_BITS), "i"(32-FRAC_BITS));\
hi; })
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
# define MULH(a, b) ({ int lo, hi; asm ("smull %0, %1, %2, %3" : "=r"(lo), "=r"(hi) : "r"(b),"r"(a)); hi; })
#else
# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))