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* sysdeps/powerpc/stpcpy.S: Define & use symbolic register names. 

Line up operands column with tabs.
2000-06-30  Greg McGary  <greg@mcgary.org>

	* sysdeps/powerpc/stpcpy.S: Define & use symbolic register names.
	Line up operands column with tabs.
This commit is contained in:
Greg McGary 2000-06-30 18:26:00 +00:00
parent 394679ebe7
commit cb2eb74250
2 changed files with 60 additions and 55 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2000-06-30 Greg McGary <greg@mcgary.org>
* sysdeps/powerpc/stpcpy.S: Define & use symbolic register names.
Line up operands column with tabs.
2000-06-30 Ulrich Drepper <drepper@redhat.com> 2000-06-30 Ulrich Drepper <drepper@redhat.com>
* elf/Makefile (LDFLAGS-origtest): Actually add it. * elf/Makefile (LDFLAGS-origtest): Actually add it.

94
sysdeps/powerpc/stpcpy.S
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@ -21,79 +21,79 @@
/* See strlen.s for comments on how the end-of-string testing works. */ /* See strlen.s for comments on how the end-of-string testing works. */
EALIGN(__stpcpy,4,0)
/* char * [r3] stpcpy (char *dest [r3], const char *src [r4]) */ /* char * [r3] stpcpy (char *dest [r3], const char *src [r4]) */
/* General register assignments: EALIGN (__stpcpy, 4, 0)
r0: temporary
r3: pointer to previous word in dest
r4: pointer to previous word in src
r6: current word from src
r7: 0xfefefeff
r8: 0x7f7f7f7f
r9: ~(word in src | 0x7f7f7f7f)
r10: alternate word from src. */
or r0,r4,r3 #define rTMP r0
clrlwi. r0,r0,30 #define rDEST r3 /* pointer to previous word in dest */
addi r3,r3,-4 #define rSRC r4 /* pointer to previous word in src */
#define rWORD r6 /* current word from src */
#define rFEFE r7 /* 0xfefefeff */
#define r7F7F r8 /* 0x7f7f7f7f */
#define rNEG r9 /* ~(word in src | 0x7f7f7f7f) */
#define rALT r10 /* alternate word from src */
or rTMP, rSRC, rDEST
clrlwi. rTMP, rTMP, 30
addi rDEST, rDEST, -4
bne L(unaligned) bne L(unaligned)
lis r7,0xfeff lis rFEFE, -0x101
lis r8,0x7f7f lis r7F7F, 0x7f7f
lwz r6,0(r4) lwz rWORD, 0(rSRC)
addi r7,r7,-0x101 addi rFEFE, rFEFE, -0x101
addi r8,r8,0x7f7f addi r7F7F, r7F7F, 0x7f7f
b L(g2) b L(g2)
L(g0): lwzu r10,4(r4) L(g0): lwzu rALT, 4(rSRC)
stwu r6,4(r3) stwu rWORD, 4(rDEST)
add r0,r7,r10 add rTMP, rFEFE, rALT
nor r9,r8,r10 nor rNEG, r7F7F, rALT
and. r0,r0,r9 and. rTMP, rTMP, rNEG
bne- L(g1) bne- L(g1)
lwzu r6,4(r4) lwzu rWORD, 4(rSRC)
stwu r10,4(r3) stwu rALT, 4(rDEST)
L(g2): add r0,r7,r6 L(g2): add rTMP, rFEFE, rWORD
nor r9,r8,r6 nor rNEG, r7F7F, rWORD
and. r0,r0,r9 and. rTMP, rTMP, rNEG
beq+ L(g0) beq+ L(g0)
mr r10,r6 mr rALT, rWORD
/* We've hit the end of the string. Do the rest byte-by-byte. */ /* We've hit the end of the string. Do the rest byte-by-byte. */
L(g1): rlwinm. r0,r10,8,24,31 L(g1): rlwinm. rTMP, rALT, 8, 24, 31
stbu r0,4(r3) stbu rTMP, 4(rDEST)
beqlr- beqlr-
rlwinm. r0,r10,16,24,31 rlwinm. rTMP, rALT, 16, 24, 31
stbu r0,1(r3) stbu rTMP, 1(rDEST)
beqlr- beqlr-
rlwinm. r0,r10,24,24,31 rlwinm. rTMP, rALT, 24, 24, 31
stbu r0,1(r3) stbu rTMP, 1(rDEST)
beqlr- beqlr-
stbu r10,1(r3) stbu rALT, 1(rDEST)
blr blr
/* Oh well. In this case, we just do a byte-by-byte copy. */ /* Oh well. In this case, we just do a byte-by-byte copy. */
.align 4 .align 4
nop nop
L(unaligned): L(unaligned):
lbz r6,0(r4) lbz rWORD, 0(rSRC)
addi r3,r3,3 addi rDEST, rDEST, 3
cmpwi r6,0 cmpwi rWORD, 0
beq- L(u2) beq- L(u2)
L(u0): lbzu r10,1(r4) L(u0): lbzu rALT, 1(rSRC)
stbu r6,1(r3) stbu rWORD, 1(rDEST)
cmpwi r10,0 cmpwi rALT, 0
beq- L(u1) beq- L(u1)
nop /* Let 601 load start of loop. */ nop /* Let 601 load start of loop. */
lbzu r6,1(r4) lbzu rWORD, 1(rSRC)
stbu r10,1(r3) stbu rALT, 1(rDEST)
cmpwi r6,0 cmpwi rWORD, 0
bne+ L(u0) bne+ L(u0)
L(u2): stbu r6,1(r3) L(u2): stbu rWORD, 1(rDEST)
blr blr
L(u1): stbu r10,1(r3) L(u1): stbu rALT, 1(rDEST)
blr blr
END (__stpcpy) END (__stpcpy)