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optimize arm setjmp/longjmp register saving/loading

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the original code was wrongly based on how it would be done in thumb
mode, but that's not needed because musl's asm only targets arm.
This commit is contained in:
Rich Felker 2012-07-27 00:17:09 -04:00
commit 5aac5e2189
2 changed files with 2 additions and 6 deletions
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4
src/setjmp/arm/longjmp.s
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@ -7,9 +7,7 @@ longjmp:
mov ip,r0 mov ip,r0
movs r0,r1 movs r0,r1
moveq r0,#1 moveq r0,#1
ldmia ip!, {v1,v2,v3,v4,v5,v6,sl,fp} ldmia ip!, {v1,v2,v3,v4,v5,v6,sl,fp,sp,lr}
ldr sp,[ip],#4
ldr lr,[ip],#4
tst lr,#1 tst lr,#1
moveq pc,lr moveq pc,lr
bx lr bx lr

4
src/setjmp/arm/setjmp.s
View file

@ -8,9 +8,7 @@ __setjmp:
_setjmp: _setjmp:
setjmp: setjmp:
mov ip,r0 mov ip,r0
stmia ip!,{v1,v2,v3,v4,v5,v6,sl,fp} stmia ip!,{v1,v2,v3,v4,v5,v6,sl,fp,sp,lr}
mov r2,sp
stmia ip!,{r2,lr}
mov r0,#0 mov r0,#0
tst lr,#1 tst lr,#1
moveq pc,lr moveq pc,lr