powerpc: Remove powerpc64 strncmp variants

The default, and power7 implementation just adds word aligned
access when inputs have the same aligment.  The unaligned case
is still done by byte operations.

This is already covered by the generic implementation, which also add
the unaligned input optimization.

Checked on powerpc64-linux-gnu built without multi-arch for powerpc64,
power7, power8, and power9 (build for le).
Reviewed-by: Rajalakshmi Srinivasaraghavan <rajis@linux.ibm.com>

1 files changed, 0 insertions, 228 deletions

diff --git a/sysdeps/powerpc/powerpc64/power7/strncmp.S b/sysdeps/powerpc/powerpc64/power7/strncmp.S
deleted file mode 100644
index 43aaf8f5b5..0000000000
--- a/sysdeps/powerpc/powerpc64/power7/strncmp.S
+++ /dev/null
@@ -1,228 +0,0 @@
-/* Optimized strcmp implementation for POWER7/PowerPC64.
-   Copyright (C) 2010-2023 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sysdep.h>
-
-#ifndef STRNCMP
-# define STRNCMP strncmp
-#endif
-
-/* See strlen.s for comments on how the end-of-string testing works.  */
-
-/* int [r3] strncmp (const char *s1 [r3],
-		     const char *s2 [r4],
-		     size_t size [r5])  */
-
-	.machine power7
-ENTRY_TOCLESS (STRNCMP, 5)
-	CALL_MCOUNT 3
-
-#define rTMP2	r0
-#define rRTN	r3
-#define rSTR1	r3	/* first string arg */
-#define rSTR2	r4	/* second string arg */
-#define rN	r5	/* max string length */
-#define rWORD1	r6	/* current word in s1 */
-#define rWORD2	r7	/* current word in s2 */
-#define rWORD3  r10
-#define rWORD4  r11
-#define rFEFE	r8	/* constant 0xfefefefefefefeff (-0x0101010101010101) */
-#define r7F7F	r9	/* constant 0x7f7f7f7f7f7f7f7f */
-#define rNEG	r10	/* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
-#define rBITDIF	r11	/* bits that differ in s1 & s2 words */
-#define rTMP	r12
-
-	dcbt	0,rSTR1
-	nop
-	or	rTMP,rSTR2,rSTR1
-	lis	r7F7F,0x7f7f
-	dcbt	0,rSTR2
-	nop
-	clrldi.	rTMP,rTMP,61
-	cmpldi	cr1,rN,0
-	lis	rFEFE,-0x101
-	bne	L(unaligned)
-/* We are doubleword aligned so set up for two loops.  first a double word
-   loop, then fall into the byte loop if any residual.  */
-	srdi.	rTMP,rN,3
-	clrldi	rN,rN,61
-	addi	rFEFE,rFEFE,-0x101
-	addi	r7F7F,r7F7F,0x7f7f
-	cmpldi	cr1,rN,0
-	beq	L(unaligned)
-
-	mtctr	rTMP
-	ld	rWORD1,0(rSTR1)
-	ld	rWORD2,0(rSTR2)
-	sldi	rTMP,rFEFE,32
-	insrdi	r7F7F,r7F7F,32,0
-	add	rFEFE,rFEFE,rTMP
-	b	L(g1)
-
-L(g0):
-	ldu	rWORD1,8(rSTR1)
-	bne	cr1,L(different)
-	ldu	rWORD2,8(rSTR2)
-L(g1):	add	rTMP,rFEFE,rWORD1
-	nor	rNEG,r7F7F,rWORD1
-	bdz	L(tail)
-	and.	rTMP,rTMP,rNEG
-	cmpd	cr1,rWORD1,rWORD2
-	beq	L(g0)
-
-/* OK. We've hit the end of the string. We need to be careful that
-   we don't compare two strings as different because of gunk beyond
-   the end of the strings...  */
-
-#ifdef __LITTLE_ENDIAN__
-L(endstring):
-	addi    rTMP2, rTMP, -1
-	beq	cr1, L(equal)
-	andc    rTMP2, rTMP2, rTMP
-	rldimi	rTMP2, rTMP2, 1, 0
-	and	rWORD2, rWORD2, rTMP2	/* Mask off gunk.  */
-	and	rWORD1, rWORD1, rTMP2
-	cmpd	cr1, rWORD1, rWORD2
-	beq	cr1, L(equal)
-	cmpb	rBITDIF, rWORD1, rWORD2	/* 0xff on equal bytes.  */
-	addi	rNEG, rBITDIF, 1
-	orc	rNEG, rNEG, rBITDIF	/* 0's below LS differing byte.  */
-	sldi	rNEG, rNEG, 8		/* 1's above LS differing byte.  */
-	andc	rWORD1, rWORD1, rNEG	/* mask off MS bytes.  */
-	andc	rWORD2, rWORD2, rNEG
-	xor.	rBITDIF, rWORD1, rWORD2
-	sub	rRTN, rWORD1, rWORD2
-	blt	L(highbit)
-	sradi	rRTN, rRTN, 63		/* must return an int.  */
-	ori	rRTN, rRTN, 1
-	blr
-L(equal):
-	li	rRTN, 0
-	blr
-
-L(different):
-	ld	rWORD1, -8(rSTR1)
-	cmpb	rBITDIF, rWORD1, rWORD2	/* 0xff on equal bytes.  */
-	addi	rNEG, rBITDIF, 1
-	orc	rNEG, rNEG, rBITDIF	/* 0's below LS differing byte.  */
-	sldi	rNEG, rNEG, 8		/* 1's above LS differing byte.  */
-	andc	rWORD1, rWORD1, rNEG	/* mask off MS bytes.  */
-	andc	rWORD2, rWORD2, rNEG
-	xor.	rBITDIF, rWORD1, rWORD2
-	sub	rRTN, rWORD1, rWORD2
-	blt	L(highbit)
-	sradi	rRTN, rRTN, 63
-	ori	rRTN, rRTN, 1
-	blr
-L(highbit):
-	sradi	rRTN, rWORD2, 63
-	ori	rRTN, rRTN, 1
-	blr
-
-#else
-L(endstring):
-	and	rTMP,r7F7F,rWORD1
-	beq	cr1,L(equal)
-	add	rTMP,rTMP,r7F7F
-	xor.	rBITDIF,rWORD1,rWORD2
-	andc	rNEG,rNEG,rTMP
-	blt	L(highbit)
-	cntlzd	rBITDIF,rBITDIF
-	cntlzd	rNEG,rNEG
-	addi	rNEG,rNEG,7
-	cmpd	cr1,rNEG,rBITDIF
-	sub	rRTN,rWORD1,rWORD2
-	blt	cr1,L(equal)
-	sradi	rRTN,rRTN,63		/* must return an int.  */
-	ori	rRTN,rRTN,1
-	blr
-L(equal):
-	li	rRTN,0
-	blr
-
-L(different):
-	ld	rWORD1,-8(rSTR1)
-	xor.	rBITDIF,rWORD1,rWORD2
-	sub	rRTN,rWORD1,rWORD2
-	blt	L(highbit)
-	sradi	rRTN,rRTN,63
-	ori	rRTN,rRTN,1
-	blr
-L(highbit):
-	sradi	rRTN,rWORD2,63
-	ori	rRTN,rRTN,1
-	blr
-#endif
-
-/* Oh well.  In this case, we just do a byte-by-byte comparison.  */
-	.align	4
-L(tail):
-	and.	rTMP,rTMP,rNEG
-	cmpd	cr1,rWORD1,rWORD2
-	bne	L(endstring)
-	addi	rSTR1,rSTR1,8
-	bne	cr1,L(different)
-	addi	rSTR2,rSTR2,8
-	cmpldi	cr1,rN,0
-L(unaligned):
-	mtctr	rN
-	ble	cr1,L(ux)
-L(uz):
-	lbz	rWORD1,0(rSTR1)
-	lbz	rWORD2,0(rSTR2)
-	.align	4
-L(u1):
-	cmpdi	cr1,rWORD1,0
-	bdz	L(u4)
-	cmpd	rWORD1,rWORD2
-	beq	cr1,L(u4)
-	bne	L(u4)
-	lbzu	rWORD3,1(rSTR1)
-	lbzu	rWORD4,1(rSTR2)
-	cmpdi	cr1,rWORD3,0
-	bdz	L(u3)
-	cmpd	rWORD3,rWORD4
-	beq	cr1,L(u3)
-	bne	L(u3)
-	lbzu	rWORD1,1(rSTR1)
-	lbzu	rWORD2,1(rSTR2)
-	cmpdi	cr1,rWORD1,0
-	bdz	L(u4)
-	cmpd	rWORD1,rWORD2
-	beq	cr1,L(u4)
-	bne	L(u4)
-	lbzu	rWORD3,1(rSTR1)
-	lbzu	rWORD4,1(rSTR2)
-	cmpdi	cr1,rWORD3,0
-	bdz	L(u3)
-	cmpd	rWORD3,rWORD4
-	beq	cr1,L(u3)
-	bne	L(u3)
-	lbzu	rWORD1,1(rSTR1)
-	lbzu	rWORD2,1(rSTR2)
-	b	L(u1)
-
-L(u3):  sub	rRTN,rWORD3,rWORD4
-	blr
-L(u4):	sub	rRTN,rWORD1,rWORD2
-	blr
-L(ux):
-	li	rRTN,0
-	blr
-END (STRNCMP)
-libc_hidden_builtin_def (strncmp)