* 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.

diff --git a/ChangeLog b/ChangeLog
index 17b01c1..721da09 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -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>
 
        * elf/Makefile (LDFLAGS-origtest): Actually add it.

diff --git a/sysdeps/powerpc/stpcpy.S b/sysdeps/powerpc/stpcpy.S
index eaea26b..2dcae07 100644 (file)
--- 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)