| /* SPDX-License-Identifier: GPL-2.0 */ |
| #include "libgcc.h" |
| |
| ; numerator in A0/A1 |
| ; denominator in A2/A3 |
| .global __modsi3 |
| __modsi3: |
| PUSHP S2P |
| bsr modnorm |
| bsr __divsi3 |
| mov.l er3,er0 |
| bra exitdiv |
| |
| .global __umodsi3 |
| __umodsi3: |
| bsr __udivsi3:16 |
| mov.l er3,er0 |
| rts |
| |
| .global __divsi3 |
| __divsi3: |
| PUSHP S2P |
| bsr divnorm |
| bsr __udivsi3:16 |
| |
| ; examine what the sign should be |
| exitdiv: |
| btst #3,S2L |
| beq reti |
| |
| ; should be -ve |
| neg.l A0P |
| |
| reti: |
| POPP S2P |
| rts |
| |
| divnorm: |
| mov.l A0P,A0P ; is the numerator -ve |
| stc ccr,S2L ; keep the sign in bit 3 of S2L |
| bge postive |
| |
| neg.l A0P ; negate arg |
| |
| postive: |
| mov.l A1P,A1P ; is the denominator -ve |
| bge postive2 |
| |
| neg.l A1P ; negate arg |
| xor.b #0x08,S2L ; toggle the result sign |
| |
| postive2: |
| rts |
| |
| ;; Basically the same, except that the sign of the divisor determines |
| ;; the sign. |
| modnorm: |
| mov.l A0P,A0P ; is the numerator -ve |
| stc ccr,S2L ; keep the sign in bit 3 of S2L |
| bge mpostive |
| |
| neg.l A0P ; negate arg |
| |
| mpostive: |
| mov.l A1P,A1P ; is the denominator -ve |
| bge mpostive2 |
| |
| neg.l A1P ; negate arg |
| |
| mpostive2: |
| rts |
| |
| .end |
