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authorGreg McGary <greg@mcgary.org>2000-06-30 18:26:00 +0000
committerGreg McGary <greg@mcgary.org>2000-06-30 18:26:00 +0000
commitcb2eb74250e3ecb219d925183eeeac1bd1d49453 (patch)
treedd06bca50d9ac82f1f843e8d744a2a832924fa3d /sysdeps/powerpc
parent394679ebe70e7334147f54e3df9907ce6c941b8f (diff)
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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.
Diffstat (limited to 'sysdeps/powerpc')
-rw-r--r--sysdeps/powerpc/stpcpy.S110
1 files changed, 55 insertions, 55 deletions
diff --git a/sysdeps/powerpc/stpcpy.S b/sysdeps/powerpc/stpcpy.S
index eaea26b44b..2dcae0738d 100644
--- a/sysdeps/powerpc/stpcpy.S
+++ b/sysdeps/powerpc/stpcpy.S
@@ -21,80 +21,80 @@
/* 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]) */
-/* General register assignments:
- 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. */
+EALIGN (__stpcpy, 4, 0)
- or r0,r4,r3
- clrlwi. r0,r0,30
- addi r3,r3,-4
- bne L(unaligned)
+#define rTMP r0
+#define rDEST r3 /* pointer to previous word in dest */
+#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 */
- lis r7,0xfeff
- lis r8,0x7f7f
- lwz r6,0(r4)
- addi r7,r7,-0x101
- addi r8,r8,0x7f7f
- b L(g2)
+ or rTMP, rSRC, rDEST
+ clrlwi. rTMP, rTMP, 30
+ addi rDEST, rDEST, -4
+ bne L(unaligned)
-L(g0): lwzu r10,4(r4)
- stwu r6,4(r3)
- add r0,r7,r10
- nor r9,r8,r10
- and. r0,r0,r9
- bne- L(g1)
- lwzu r6,4(r4)
- stwu r10,4(r3)
-L(g2): add r0,r7,r6
- nor r9,r8,r6
- and. r0,r0,r9
- beq+ L(g0)
+ lis rFEFE, -0x101
+ lis r7F7F, 0x7f7f
+ lwz rWORD, 0(rSRC)
+ addi rFEFE, rFEFE, -0x101
+ addi r7F7F, r7F7F, 0x7f7f
+ b L(g2)
- mr r10,r6
+L(g0): lwzu rALT, 4(rSRC)
+ stwu rWORD, 4(rDEST)
+ add rTMP, rFEFE, rALT
+ nor rNEG, r7F7F, rALT
+ and. rTMP, rTMP, rNEG
+ bne- L(g1)
+ lwzu rWORD, 4(rSRC)
+ stwu rALT, 4(rDEST)
+L(g2): add rTMP, rFEFE, rWORD
+ nor rNEG, r7F7F, rWORD
+ and. rTMP, rTMP, rNEG
+ beq+ L(g0)
+
+ mr rALT, rWORD
/* We've hit the end of the string. Do the rest byte-by-byte. */
-L(g1): rlwinm. r0,r10,8,24,31
- stbu r0,4(r3)
+L(g1): rlwinm. rTMP, rALT, 8, 24, 31
+ stbu rTMP, 4(rDEST)
beqlr-
- rlwinm. r0,r10,16,24,31
- stbu r0,1(r3)
+ rlwinm. rTMP, rALT, 16, 24, 31
+ stbu rTMP, 1(rDEST)
beqlr-
- rlwinm. r0,r10,24,24,31
- stbu r0,1(r3)
+ rlwinm. rTMP, rALT, 24, 24, 31
+ stbu rTMP, 1(rDEST)
beqlr-
- stbu r10,1(r3)
+ stbu rALT, 1(rDEST)
blr
/* Oh well. In this case, we just do a byte-by-byte copy. */
.align 4
nop
L(unaligned):
- lbz r6,0(r4)
- addi r3,r3,3
- cmpwi r6,0
- beq- L(u2)
+ lbz rWORD, 0(rSRC)
+ addi rDEST, rDEST, 3
+ cmpwi rWORD, 0
+ beq- L(u2)
-L(u0): lbzu r10,1(r4)
- stbu r6,1(r3)
- cmpwi r10,0
- beq- L(u1)
+L(u0): lbzu rALT, 1(rSRC)
+ stbu rWORD, 1(rDEST)
+ cmpwi rALT, 0
+ beq- L(u1)
nop /* Let 601 load start of loop. */
- lbzu r6,1(r4)
- stbu r10,1(r3)
- cmpwi r6,0
- bne+ L(u0)
-L(u2): stbu r6,1(r3)
+ lbzu rWORD, 1(rSRC)
+ stbu rALT, 1(rDEST)
+ cmpwi rWORD, 0
+ bne+ L(u0)
+L(u2): stbu rWORD, 1(rDEST)
blr
-L(u1): stbu r10,1(r3)
+L(u1): stbu rALT, 1(rDEST)
blr
-END(__stpcpy)
+END (__stpcpy)
weak_alias (__stpcpy, stpcpy)