/* This is an assembly language implementation of mulsi3, divsi3, and modsi3 for the sparclite processor. These routines are all from the SPARClite User's Guide, slightly edited to match the desired calling convention, and also to optimize them. */ #ifdef L_udivsi3 .text .align 4 .global .udiv .proc 04 .udiv: wr %g0,%g0,%y ! Not a delayed write for sparclite tst %g0 divscc %o0,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 retl divscc %g1,%o1,%o0 #endif #ifdef L_umodsi3 .text .align 4 .global .urem .proc 04 .urem: wr %g0,%g0,%y ! Not a delayed write for sparclite tst %g0 divscc %o0,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 divscc %g1,%o1,%g1 bl 1f rd %y,%o0 retl nop 1: retl add %o0,%o1,%o0 #endif #ifdef L_divsi3 .text .align 4 .global .div .proc 04 ! ??? This routine could be made faster if was optimized, and if it was ! rewritten to only calculate the quotient. .div: wr %g0,%g0,%y ! Not a delayed write for sparclite mov %o1,%o4 tst %o1 bl,a 1f sub %g0,%o4,%o4 1: tst %o0 bl,a 2f mov -1,%y 2: divscc %o0,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 be 6f mov %y,%o3 bg 4f addcc %o3,%o4,%g0 be,a 6f mov %g0,%o3 tst %o0 bl 5f tst %g1 ba 5f add %o3,%o4,%o3 4: subcc %o3,%o4,%g0 be,a 6f mov %g0,%o3 tst %o0 bge 5f tst %g1 sub %o3,%o4,%o3 5: bl,a 6f add %g1,1,%g1 6: tst %o1 bl,a 7f sub %g0,%g1,%g1 7: retl mov %g1,%o0 ! Quotient is in %g1. #endif #ifdef L_modsi3 .text .align 4 .global .rem .proc 04 ! ??? This routine could be made faster if was optimized, and if it was ! rewritten to only calculate the remainder. .rem: wr %g0,%g0,%y ! Not a delayed write for sparclite mov %o1,%o4 tst %o1 bl,a 1f sub %g0,%o4,%o4 1: tst %o0 bl,a 2f mov -1,%y 2: divscc %o0,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 divscc %g1,%o4,%g1 be 6f mov %y,%o3 bg 4f addcc %o3,%o4,%g0 be,a 6f mov %g0,%o3 tst %o0 bl 5f tst %g1 ba 5f add %o3,%o4,%o3 4: subcc %o3,%o4,%g0 be,a 6f mov %g0,%o3 tst %o0 bge 5f tst %g1 sub %o3,%o4,%o3 5: bl,a 6f add %g1,1,%g1 6: tst %o1 bl,a 7f sub %g0,%g1,%g1 7: retl mov %o3,%o0 ! Remainder is in %o3. #endif