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Fix a whole bunch of dependancy bugs and make it actually work when the

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size is not a multiple of eight.
This commit is contained in:
dfr 2001-09-22 18:27:01 +00:00
parent 8a0f924b15
commit 69d68ac34b
1 changed files with 10 additions and 7 deletions
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17
lib/libc/ia64/string/bzero.S
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@ -38,28 +38,30 @@ ENTRY(bzero, 2)
cmp.ltu p6,p0=17,in1 // check for small
(p6) br.dptk.few 3f
add r15=-1,in1 ;;
1: mov ar.lc=r15
1: add r15=-1,in1 ;;
mov ar.lc=r15 ;;
2: st1 [in0]=r0,1 // zero one byte
br.cloop.sptk.few 2b // loop
;;
mov ar.lc=r14 // done
br.ret.sptk.few rp
// Zero up to 8byte alignment
3: tbit.nz p6,p0=in1,0 ;;
3: tbit.nz p6,p0=in0,0 ;;
(p6) st1 [in0]=r0,1
(p6) add in1=-1,in1
tbit.nz p6,p0=in1,1 ;;
tbit.nz p6,p0=in0,1 ;;
(p6) st2 [in0]=r0,2
(p6) add in1=-2,in1
tbit.nz p6,p0=in1,2 ;;
tbit.nz p6,p0=in0,2 ;;
(p6) st4 [in0]=r0,4
(p6) add in1=-4,in1
;;
shr.u r15=in1,3 // word count
extr.u in1=in1,0,3 ;; // trailing bytes
cmp.eq p6,p0=r15,r0 // check for zero
@ -67,13 +69,14 @@ ENTRY(bzero, 2)
(p6) br.dpnt.few 1b // zero last bytes
add r15=-1,r15 ;;
mov ar.lc=r15
mov ar.lc=r15 ;;
4: st8 [in0]=r0,8
br.cloop.sptk.few 4b
(p7) br.dpnt.few 1b // zero last bytes
;;
mov ar.lc=r14 // done
br.ret.sptk.few rp
END(bzero)
END(bzero)