diff options
Diffstat (limited to 'libmp/Plan9-amd64/mpdigdiv.s')
| -rw-r--r-- | libmp/Plan9-amd64/mpdigdiv.s | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libmp/Plan9-amd64/mpdigdiv.s b/libmp/Plan9-amd64/mpdigdiv.s new file mode 100644 index 00000000..6025d141 --- /dev/null +++ b/libmp/Plan9-amd64/mpdigdiv.s @@ -0,0 +1,21 @@ +TEXT mpdigdiv(SB),$0 + +/* MOVL dividend+0(FP),BX */ + MOVL 0(RARG),AX + MOVL 4(RARG),DX + MOVL divisor+8(FP),BX + MOVQ quotient+16(FP),DI + 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(DI) + RET + + /* return all 1's */ +_divovfl: + NOTL CX + MOVL CX,0(DI) + RET |