powerpc: refactor strcasecmp, strcmp, and strncmp IFUNC.

Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.

Tested on ppc64le with and without --disable-multi-arch flag.

	* sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l-power7.S: Define
	the implementation-specific function name and remove unneeded
	macros definition.
	* sysdeps/powerpc/powerpc64/multiarch/strcmp-power7.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcmp-power8.S Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcmp-power9.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp-power8.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp-power9.S: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S: Likewise.
	* sysdeps/powerpc/powerpc64/power4/strncmp.S: Set a default function
	name if not defined and pass as parameter to macros accordingly.
	* sysdeps/powerpc/powerpc64/power7/strcmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/power8/strcmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/power8/strncmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/power9/strcmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/power9/strncmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/strcmp.S: Likewise.
	* sysdeps/powerpc/powerpc64/strncmp.S: Likewise.

2 files changed, 12 insertions, 4 deletions

diff --git a/sysdeps/powerpc/powerpc64/power9/strcmp.S b/sysdeps/powerpc/powerpc64/power9/strcmp.S
index 17ec8c24c3..2dc4f6c722 100644
--- a/sysdeps/powerpc/powerpc64/power9/strcmp.S
+++ b/sysdeps/powerpc/powerpc64/power9/strcmp.S
@@ -18,6 +18,10 @@
 #ifdef __LITTLE_ENDIAN__
 #include <sysdep.h>
 
+#ifndef STRCMP
+# define STRCMP strcmp
+#endif
+
 /* Implements the function
 
    int [r3] strcmp (const char *s1 [r3], const char *s2 [r4])
@@ -62,7 +66,7 @@
    allows it.  */
 
 	.machine  power7
-EALIGN (strcmp, 4, 0)
+EALIGN (STRCMP, 4, 0)
 	li	r0, 0
 
 	/* Check if [s1]+16 or [s2]+16 will cross a 4K page boundary using
@@ -257,7 +261,7 @@ L(pagecross_retdiff):
 L(pagecross_nullfound):
 	li	r3, 0
 	b	L(pagecross_retdiff)
-END (strcmp)
+END (STRCMP)
 libc_hidden_builtin_def (strcmp)
 #else
 #include <sysdeps/powerpc/powerpc64/power8/strcmp.S>
diff --git a/sysdeps/powerpc/powerpc64/power9/strncmp.S b/sysdeps/powerpc/powerpc64/power9/strncmp.S
index 14d016a0e2..c946a5c638 100644
--- a/sysdeps/powerpc/powerpc64/power9/strncmp.S
+++ b/sysdeps/powerpc/powerpc64/power9/strncmp.S
@@ -26,6 +26,10 @@
    code paths depending of data alignment for first 32 bytes and uses
    vectorised loops after that.  */
 
+#ifndef STRNCMP
+# define STRNCMP strncmp
+#endif
+
 /* TODO: Change this to actual instructions when minimum binutils is upgraded
    to 2.27. Macros are defined below for these newer instructions in order
    to maintain compatibility.  */
@@ -64,7 +68,7 @@
 /* TODO: change this to .machine power9 when minimum binutils
    is upgraded to 2.27.  */
 	.machine  power7
-EALIGN (strncmp, 4, 0)
+EALIGN (STRNCMP, 4, 0)
 	/* Check if size is 0.  */
 	cmpdi	cr0, r5, 0
 	beq	cr0, L(ret0)
@@ -368,7 +372,7 @@ L(byte_ne_2):
 L(byte_ne_3):
 	extsw	r7, r7
 	b	L(byte_ne_1)
-END(strncmp)
+END(STRNCMP)
 libc_hidden_builtin_def(strncmp)
 #else
 #include <sysdeps/powerpc/powerpc64/power8/strncmp.S>