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* libc/machine/sh/memset.S: Fix problem with alloco region

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exceeding destination region for length >= 88 bytes, start
	& 0x16 == 0, end & 0x1f == 18.
This commit is contained in:
Joern Rennecke
2003-04-03 13:06:02 +00:00
parent 8ae6a3ddaa
commit 40c3b2d03b
2 changed files with 18 additions and 12 deletions
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6
newlib/ChangeLog
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@@ -1,3 +1,9 @@
Thu Apr 3 14:01:16 2003 J"orn Rennecke <joern.rennecke@superh.com>
* libc/machine/sh/memset.S: Fix problem with alloco region
exceeding destination region for length >= 88 bytes, start
& 0x16 == 0, end & 0x1f == 18.
2001-04-03 Corinna Vinschen <corinna@vinschen.de> 2001-04-03 Corinna Vinschen <corinna@vinschen.de>
* libc/string/wcscoll.c: Fix comment. * libc/string/wcscoll.c: Fix comment.

24
newlib/libc/machine/sh/memset.S
View File

@@ -12,14 +12,16 @@
ENTRY(memset) ENTRY(memset)
#if __SHMEDIA__ #if __SHMEDIA__
pta/l multiquad, tr0 pta/l multiquad, tr0
andi r2, 7, r22
ptabs r18, tr2
mshflo.b r3,r3,r3 mshflo.b r3,r3,r3
add r4, r22, r23 ptabs r18, tr2
mperm.w r3, r63, r3 // Fill pattern now in every byte of r3 mperm.w r3, r63, r3 // Fill pattern now in every byte of r3
movi 8, r9 andi r2, -8, r25
bgtu/u r23, r9, tr0 // multiquad add r2, r4, r5
addi r5, -1, r20 // calculate end address.
andi r20, -8, r20
cmveq r4, r25, r20
bne/u r25, r20, tr0 // multiquad
ldlo.q r2, 0, r7 ldlo.q r2, 0, r7
shlli r4, 2, r4 shlli r4, 2, r4
@@ -33,18 +35,16 @@ ENTRY(memset)
multiquad: multiquad:
pta/l lastquad, tr0 pta/l lastquad, tr0
stlo.q r2, 0, r3 stlo.q r2, 0, r3
shlri r23, 3, r24 sub r20, r25, r24
add r2, r4, r5 movi 64, r9
beqi/u r24, 1, tr0 // lastquad beqi/u r24, 8, tr0 // lastquad
pta/l loop, tr1 pta/l loop, tr1
sub r2, r22, r25
andi r5, -8, r20 // calculate end address and
addi r20, -7*8, r8 // loop end address; This might overflow, so we need addi r20, -7*8, r8 // loop end address; This might overflow, so we need
// to use a different test before we start the loop // to use a different test before we start the loop
bge/u r24, r9, tr1 // loop bgeu/u r24, r9, tr1// loop
st.q r25, 8, r3 st.q r25, 8, r3
shlri r24, 4, r24
st.q r20, -8, r3 st.q r20, -8, r3
shlri r24, 1, r24
beqi/u r24, 1, tr0 // lastquad beqi/u r24, 1, tr0 // lastquad
st.q r25, 16, r3 st.q r25, 16, r3
st.q r20, -16, r3 st.q r20, -16, r3