> Right, so the problem is that the unsigned inline code Ian posted is never
> used. Maybe using unsigned arithmetic would work better. Try this:
>
> #include <stdint.h>
>
> inline int xxMULH(int a, int b)
> {
> uint32_t au = a;
> uint32_t bu = b;
>
> uint64_t res = (uint64_t)au * (uint64_t)bu;
> uint32_t res2 = res >> 32;
>
> if (a < 0)
> res2 -= bu;
> if (b < 0)
> res2 -= au;
>
> return (int)res2;
> }
#NO_APP
.text
.even
.globl _xxMULH
_xxMULH:
lea (-20,sp),sp
move.l 24(sp),(sp)
move.l 28(sp),4(sp)
move.l (sp),d1
clr.l d0
move.l 4(sp),a1
lea 0.w,a0
move.l a1,-(sp)
move.l a0,-(sp)
move.l d1,-(sp)
move.l d0,-(sp)
jsr ___muldi3
lea (16,sp),sp
move.l d0,8(sp)
move.l d1,12(sp)
move.l 8(sp),d0
move.l 12(sp),d1
move.l d0,d1
clr.l d0
move.l d1,16(sp)
tst.l 24(sp)
jge L2
move.l 4(sp),d0
sub.l d0,16(sp)
L2:
tst.l 28(sp)
jge L3
move.l (sp),d0
sub.l d0,16(sp)
L3:
move.l 16(sp),d0
lea (20,sp),sp
rts
