diff options
Diffstat (limited to 'libmp/Inferno-386/mpdigdiv.s')
| -rw-r--r-- | libmp/Inferno-386/mpdigdiv.s | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libmp/Inferno-386/mpdigdiv.s b/libmp/Inferno-386/mpdigdiv.s new file mode 100644 index 00000000..8ee4d67a --- /dev/null +++ b/libmp/Inferno-386/mpdigdiv.s @@ -0,0 +1,21 @@ +TEXT mpdigdiv(SB),$0 + + MOVL dividend+0(FP),BX + MOVL 0(BX),AX + MOVL 4(BX),DX + MOVL divisor+4(FP),BX + MOVL quotient+8(FP),BP + XORL CX,CX + CMPL DX,BX /* dividend >= 2^32 * divisor */ + JHS _divovfl + CMPL BX,CX /* divisor == 0 */ + JE _divovfl + DIVL BX /* AX = DX:AX/BX */ + MOVL AX,0(BP) + RET + + /* return all 1's */ +_divovfl: + NOTL CX + MOVL CX,0(BP) + RET |