> This is wrong. It should be:
>
> #define umul_ppmm(xh, xl, a, b) \
> __asm__ ("| Inlined umul_ppmm\n" \
> " move%.l %2,%/d0\n" \
> " move%.l %3,%/d1\n" \
> " move%.l %/d0,%/d2\n" \
> " swap %/d0\n" \
> " move%.l %/d1,%/d3\n" \
> " swap %/d1\n" \
> " move%.w %/d2,%/d4\n" \
> " mulu %/d3,%/d4\n" \
> " mulu %/d1,%/d2\n" \
> " mulu %/d0,%/d3\n" \
> " mulu %/d0,%/d1\n" \
> " move%.l %/d4,%/d0\n" \
> " eor%.w %/d0,%/d0\n" \
> " swap %/d0\n" \
> " add%.l %/d0,%/d2\n" \
> " add%.l %/d3,%/d2\n" \
> " jcc 1f\n" \
> " add%.l %#65536,%/d1\n" \
> "1: swap %/d2\n" \
> " moveq %#0,%/d0\n" \
> " move%.w %/d2,%/d0\n" \
> " move%.w %/d4,%/d2\n" \
> " move%.l %/d2,%1\n" \
> " add%.l %/d1,%/d0\n" \
> " move%.l %/d0,%0" \
> : "=g" ((uint32_t) (xh)), \
> "=g" ((uint32_t) (xl)) \
> : "g" ((uint32_t) (a)), \
> "g" ((uint32_t) (b)) \
> : "d0", "d1", "d2", "d3", "d4")
>
> inline int xxMULH(int a, int b)
> {
> uint32_t au = a;
> uint32_t bu = b;
>
> uint32_t resh, resl;
>
> umul_ppmm(resh, resl, au, bu);
>
> if (a < 0)
> resh -= bu;
> if (b < 0)
> resh -= au;
>
> return (int)resh;
> }
Maybe it's also possible to use this asm inline also for these functions?
#ifndef MULL
# define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s))
#endif
#ifndef MUL64
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
#endif
#ifndef MAC64
# define MAC64(d, a, b) ((d) += MUL64(a, b))
#endif
#ifndef MLS64
# define MLS64(d, a, b) ((d) -= MUL64(a, b))
#endif
All functions used by FFmpeg's mp3 decoder.
