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standard lib.c
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1994-04-02
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52 lines
/********************************************************************
module: standard lib.c
********************************************************************/
/* --------------------------------------------------------------------------------- */
#pragma options(!require_protos)
void * memset(/* void *s, int c, size_t n */)
{
asm {
move.l 4(sp),d0 ; D0.L = result
movea.l d0,a0 ; A0 = s
#if __option(int_4)
move.b 11(sp),d1 ; D1.B = (unsigned char) c
move.l 12(sp),d2 ; D2.L = n
#else
move.b 9(sp),d1 ; D1.B = (unsigned char) c
move.l 10(sp),d2 ; D2.L = n
#endif
bra.s @2
@1 move.b d1,(a0)+
subq.l #1,d2
@2 bne.s @1
}
}
/* --------------------------------------------------------------------------------- */
int memcmp(/* const void *s1, const void *s2, size_t n */)
{
asm {
moveq #0,d0 ; D0.L = result
movea.l 4(sp),a0 ; A0 = s1
movea.l 8(sp),a1 ; A1 = s2
move.l 12(sp),d1 ; D1.L = n
bra.s @2
@1 subq.l #1,d1
@2 beq.s @4
cmpm.b (a0)+,(a1)+
beq.s @1
blo.s @3
subq.l #2,d0
@3 addq.l #1,d0
@4 }
}