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* libc/machine/sh/memset.S (memset, __SHMEDIA__ code):

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Also handle as single quad word when destination ends at last
	byte of first quad word.  Fix byte selection in single quad code.
This commit is contained in:
Joern Rennecke
2002-05-08 17:56:50 +00:00
parent 0dc9d4d7ed
commit 96bff22c5d
2 changed files with 24 additions and 16 deletions
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20
newlib/libc/machine/sh/memset.S
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@ -12,33 +12,35 @@
ENTRY(memset)
#if __SHMEDIA__
pta/l multiquad, tr0
andi r2, 7, r22
ptabs r18, tr2
mshflo.b r3,r3,r3
mperm.w r3, r63, r3
andi r2, 7, r22
add r4, r22, r23
shlri r23, 3, r24
bnei/u r24, 0, tr0
mperm.w r3, r63, r3 // Fill pattern now in every byte of r3
movi 8, r9
bgtu/u r23, r9, tr0
ldlo.q r2, 0, r7
shlli r4, 3, r4
shlli r4, 2, r4
movi -1, r8
SHHI r8, r4, r8
mcmv r7, r8, r22
stlo.q r2, 0, r22
SHHI r8, r4, r8
mcmv r7, r8, r3
stlo.q r2, 0, r3
blink tr2, r63
multiquad:
pta/l lastquad, tr0
stlo.q r2, 0, r3
shlri r23, 3, r24
add r2, r4, r5
beqi/u r24, 1, tr0 // lastquad
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
movi 8, r9 // 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
st.q r25, 8, r3
st.q r20, -8, r3