powerpc: Various P7-optimized string functions

7 files changed, 1048 insertions, 0 deletions

diff --git a/sysdeps/powerpc/powerpc64/power7/memchr.S b/sysdeps/powerpc/powerpc64/power7/memchr.S
new file mode 100644
index 0000000000..4839df1875
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/memchr.S
@@ -0,0 +1,171 @@
+/* Optimized memchr implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] memchr (char *s [r3], int byte [r4], int size [r5])  */
+	.machine  power7
+ENTRY (BP_SYM (__memchr))
+	CALL_MCOUNT 2
+	dcbt	0,r3
+	clrrdi  r8,r3,3
+	rlwimi	r4,r4,8,16,23
+	rlwimi	r4,r4,16,0,15
+	insrdi  r4,r4,32,0
+	add	r7,r3,r5      /* Calculate the last acceptable address.  */
+	cmpldi	r5,32
+	ble	L(small_range)
+
+	cmpld	cr7,r3,r7     /* Is the address equal or less than r3?  If
+				 it's equal or less, it means size is either 0
+				 or a negative number.  */
+	ble	cr7,L(proceed)
+
+	li	r7,-1	      /* Make r11 the biggest if r4 <= 0.  */
+L(proceed):
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load doubleword from memory.  */
+	cmpb	r10,r12,r4    /* Check for BYTE's in DWORD1.  */
+	sld	r10,r10,r6
+	srd	r10,r10,r6
+	cmpldi	cr7,r10,0     /* If r10 == 0, no BYTE's's have been found.  */
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	bge	cr6,L(null)
+
+	mtcrf   0x01,r8
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop_setup)
+
+	/* Handle DWORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb	r10,r12,r4
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	bge	cr6,L(null)
+
+L(loop_setup):
+	sub	r5,r7,r9
+	srdi	r6,r5,4	      /* Number of loop iterations.  */
+	mtctr	r6	      /* Setup the counter.  */
+	b	L(loop)
+	/* Main loop to look for BYTE backwards in the string.  Since
+	   it's a small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the byte-checking process for bigger strings.  */
+
+	ld	r12,8(r8)
+	ldu	r11,16(r8)
+	cmpb	r10,r12,r4
+	cmpb	r9,r11,r4
+	or	r5,r9,r10     /* Merge everything in one doubleword.  */
+	cmpldi	cr7,r5,0
+	bne	cr7,L(found)
+	bdnz	L(loop)
+	/* We're here because the counter reached 0, and that means we
+	   didn't have any matches for BYTE in the whole range.  Just return
+	   the original range.  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	blt	cr6,L(loop_small)
+	b	L(null)
+
+	/* OK, one (or both) of the doublewords contains BYTE.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains BYTE.  */
+	.align	4
+L(found):
+	cmpldi	cr6,r10,0
+	addi	r8,r8,-8
+	bne	cr6,L(done)
+
+	/* BYTE must be in the second doubleword.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   pointer.  */
+
+	mr	r10,r9
+	addi	r8,r8,8
+
+	/* r10 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as BYTE in the original
+	   doubleword from the string.  Use that to calculate the pointer.
+	   We need to make sure BYTE is *before* the end of the
+	   range.  */
+L(done):
+	cntlzd	r0,r10	      /* Count leading zeroes before the match.  */
+	srdi	r0,r0,3	      /* Convert leading zeroes to bytes.  */
+	add	r3,r8,r0
+	cmpld	r3,r7
+	bge	L(null)
+	blr
+
+	.align	4
+L(null):
+	li	r3,0
+	blr
+
+/* Deals with size <= 32.  */
+	.align	4
+L(small_range):
+	cmpldi	r5,0
+	beq	L(null)
+
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load word from memory.  */
+	cmpb	r10,r12,r4    /* Check for BYTE in DWORD1.  */
+	sld	r10,r10,r6
+	srd	r10,r10,r6
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi    r9,r8,8
+	cmpld	r9,r7
+	bge	L(null)
+	b	L(loop_small)
+
+	.p2align  5
+L(loop_small):
+	ldu	r12,8(r8)
+	cmpb	r10,r12,r4
+	addi	r9,r8,8
+	cmpldi	cr6,r10,0
+	bne	cr6,L(done)
+	cmpld	r9,r7
+	bge	L(null)
+	b	L(loop_small)
+
+END (BP_SYM (__memchr))
+weak_alias (BP_SYM (__memchr), BP_SYM(memchr))
+libc_hidden_builtin_def (memchr)
diff --git a/sysdeps/powerpc/powerpc64/power7/memrchr.S b/sysdeps/powerpc/powerpc64/power7/memrchr.S
new file mode 100644
index 0000000000..a56ba21088
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/memrchr.S
@@ -0,0 +1,180 @@
+/* Optimized memrchr implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] memrchr (char *s [r3], int byte [r4], int size [r5])  */
+	.machine  power7
+ENTRY (BP_SYM (__memrchr))
+	CALL_MCOUNT
+	dcbt	0,r3
+	mr	r7,r3
+	add	r3,r7,r5      /* Calculate the last acceptable address.  */
+	cmpld	cr7,r3,r7     /* Is the address equal or less than r3?  */
+
+	/* Replicate BYTE to doubleword.  */
+	rlwimi	r4,r4,8,16,23
+	rlwimi	r4,r4,16,0,15
+	insrdi  r4,r4,32,0
+	bge	cr7,L(proceed)
+
+	li	r3,-1	      /* Make r11 the biggest if r4 <= 0.  */
+L(proceed):
+	li	r6,-8
+	addi	r9,r3,-1
+	clrrdi  r8,r9,3
+	addi	r8,r8,8
+	neg	r0,r3
+	rlwinm	r0,r0,3,26,28 /* Calculate padding.  */
+
+	cmpldi	r5,32
+	ble	L(small_range)
+
+	ldbrx	r12,r8,r6     /* Load reversed doubleword from memory.  */
+	cmpb	r10,r12,r4    /* Check for BYTE in DWORD1.  */
+	sld	r10,r10,r0
+	srd	r10,r10,r0
+	cmpldi	cr7,r10,0     /* If r10 == 0, no BYTE's have been found.  */
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r9,r8,-8
+	cmpld	cr6,r9,r7
+	ble	cr6,L(null)
+
+	mtcrf   0x01,r8
+	/* Are we now aligned to a doubleword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+	mr	r8,r9
+	bt	28,L(loop_setup)
+
+	/* Handle DWORD2 of pair.  */
+	ldbrx	r12,r8,r6
+	cmpb	r10,r12,r4
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	/* Are we done already.  */
+	addi	r8,r8,-8
+	cmpld	cr6,r8,r7
+	ble	cr6,L(null)
+
+L(loop_setup):
+	li	r0,-16
+	sub	r5,r8,r7
+	srdi	r9,r5,4	      /* Number of loop iterations.  */
+	mtctr	r9	      /* Setup the counter.  */
+	b	L(loop)
+	/* Main loop to look for BYTE backwards in the string.  Since it's a
+	   small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the byte-checking process for bigger strings.  */
+
+	ldbrx	r12,r8,r6
+	ldbrx	r11,r8,r0
+	addi	r8,r8,-8
+	cmpb	r10,r12,r4
+	cmpb	r9,r11,r4
+	or	r5,r9,r10     /* Merge everything in one doubleword.  */
+	cmpldi	cr7,r5,0
+	bne	cr7,L(found)
+	addi	r8,r8,-8
+	bdnz	L(loop)
+	/* We're here because the counter reached 0, and that means we
+	   didn't have any matches for BYTE in the whole range.  Just return
+	   the original range.  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	bgt	cr6,L(loop_small)
+	b	L(null)
+
+	/* OK, one (or both) of the words contains BYTE.  Check
+	   the first word and decrement the address in case the first
+	   word really contains BYTE.  */
+	.align	4
+L(found):
+	cmpldi	cr6,r10,0
+	addi	r8,r8,8
+	bne	cr6,L(done)
+
+	/* BYTE must be in the second word.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   pointer.  */
+
+	mr	r10,r9
+	addi	r8,r8,-8
+
+	/* r10 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the BYTE in the original
+	   word from the string.  Use that to calculate the pointer.
+	   We need to make sure BYTE is *before* the end of the
+	   range.  */
+L(done):
+	cntlzd	r0,r10	      /* Count leading zeroes before the match.  */
+	srdi	r6,r0,3	      /* Convert leading zeroes to bytes.  */
+	addi	r0,r6,1
+	sub	r3,r8,r0
+	cmpld	r3,r7
+	blt	L(null)
+	blr
+
+	.align	4
+L(null):
+	li	r3,0
+	blr
+
+/* Deals with size <= 32.  */
+	.align	4
+L(small_range):
+	cmpldi	r5,0
+	beq	L(null)
+
+	ldbrx	r12,r8,r6     /* Load reversed doubleword from memory.  */
+	cmpb	r10,r12,r4    /* Check for BYTE in DWORD1.  */
+	sld	r10,r10,r0
+	srd	r10,r10,r0
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r8,r8,-8
+	cmpld	r8,r7
+	ble	L(null)
+	b	L(loop_small)
+
+	.p2align  5
+L(loop_small):
+	ldbrx	r12,r8,r6
+	cmpb	r10,r12,r4
+	cmpldi	cr6,r10,0
+	bne	cr6,L(done)
+	addi	r8,r8,-8
+	cmpld	r8,r7
+	ble	L(null)
+	b	L(loop_small)
+
+END (BP_SYM (__memrchr))
+weak_alias (BP_SYM (__memrchr), BP_SYM(memrchr))
+libc_hidden_builtin_def (memrchr)
diff --git a/sysdeps/powerpc/powerpc64/power7/rawmemchr.S b/sysdeps/powerpc/powerpc64/power7/rawmemchr.S
new file mode 100644
index 0000000000..0e1ecc3193
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/rawmemchr.S
@@ -0,0 +1,103 @@
+/* Optimized rawmemchr implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] rawmemchr (void *s [r3], int c [r4])  */
+	.machine  power7
+ENTRY (BP_SYM(__rawmemchr))
+	CALL_MCOUNT 2
+	dcbt	0,r3
+	clrrdi	r8,r3,3	      /* Align the address to doubleword boundary.  */
+
+	/* Replicate byte to doubleword.  */
+	rlwimi	r4,r4,8,16,23
+	rlwimi	r4,r4,16,0,15
+	insrdi	r4,r4,32,0
+
+	/* Now r4 has a doubleword of c bytes.  */
+
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load doubleword from memory.  */
+	cmpb	r5,r12,r4     /* Compare each byte against c byte.  */
+	sld	r5,r5,r6      /* Move left to discard ignored bits.  */
+	srd	r5,r5,r6      /* Bring the bits back as zeros.  */
+	cmpdi	cr7,r5,0      /* If r5 == 0, no c bytes have been found.  */
+	bne	cr7,L(done)
+
+	mtcrf   0x01,r8
+
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop)
+
+	/* Handle DWORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb	r5,r12,r4
+	cmpdi	cr7,r5,0
+	bne	cr7,L(done)
+	b	L(loop)	      /* We branch here (rather than falling through)
+				 to skip the nops due to heavy alignment
+				 of the loop below.  */
+
+	/* Main loop to look for the end of the string.  Since it's a
+	   small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the byte-checking process for bigger strings.  */
+	ld	r12,8(r8)
+	ldu     r11,16(r8)
+	cmpb	r5,r12,r4
+	cmpb	r6,r11,r4
+	or	r7,r5,r6
+	cmpdi	cr7,r7,0
+	beq	cr7,L(loop)
+
+	/* OK, one (or both) of the doublewords contains a 'c' byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a c byte.  */
+
+	cmpdi	cr6,r5,0
+	addi	r8,r8,-8
+	bne	cr6,L(done)
+
+	/* The 'c' byte must be in the second doubleword.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   pointer.  */
+	mr	r5,r6
+	addi	r8,r8,8
+
+	/* r5 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the 'c' byte in the original
+	   doubleword from the string.  Use that fact to find out what is
+	   the position of the byte inside the string.  */
+L(done):
+	cntlzd	r0,r5	      /* Count leading zeros before the match.  */
+	srdi	r0,r0,3	      /* Convert leading zeroes to bytes.  */
+	add	r3,r8,r0      /* Return address of the matching char.  */
+	blr
+END (BP_SYM (__rawmemchr))
+weak_alias (__rawmemchr,rawmemchr)
+libc_hidden_builtin_def (__rawmemchr)
diff --git a/sysdeps/powerpc/powerpc64/power7/strchr.S b/sysdeps/powerpc/powerpc64/power7/strchr.S
new file mode 100644
index 0000000000..16aee25402
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/strchr.S
@@ -0,0 +1,204 @@
+/* Optimized strchr implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] strchr (char *s [r3], int c [r4])  */
+	.machine  power7
+ENTRY (BP_SYM(strchr))
+	CALL_MCOUNT 2
+	dcbt	0,r3
+	clrrdi	r8,r3,3	      /* Align the address to doubleword boundary.  */
+	cmpdi	cr7,r4,0
+	ld	r12,0(r8)     /* Load doubleword from memory.  */
+	li	r0,0	      /* Doubleword with null chars to use
+				 with cmpb.  */
+
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+
+	beq	cr7,L(null_match)
+
+	/* Replicate byte to doubleword.  */
+	rlwimi	r4,r4,8,16,23
+	rlwimi	r4,r4,16,0,15
+	insrdi  r4,r4,32,0
+
+	/* Now r4 has a doubleword of c bytes and r0 has
+	   a doubleword of null bytes.  */
+
+	cmpb	r10,r12,r4     /* Compare each byte against c byte.  */
+	cmpb	r11,r12,r0     /* Compare each byte against null byte.  */
+
+	/* Move the doublewords left and right to discard the bits that are
+	   not part of the string and bring them back as zeros.  */
+
+	sld	r10,r10,r6
+	sld	r11,r11,r6
+	srd	r10,r10,r6
+	srd	r11,r11,r6
+	or	r5,r10,r11    /* OR the results to speed things up.  */
+	cmpdi	cr7,r5,0      /* If r5 == 0, no c or null bytes
+				 have been found.  */
+	bne	cr7,L(done)
+
+	mtcrf   0x01,r8
+
+	/* Are we now aligned to a doubleword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop)
+
+	/* Handle WORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb    r10,r12,r4
+	cmpb	r11,r12,r0
+	or	r5,r10,r11
+	cmpdi	cr7,r5,0
+	bne	cr7,L(done)
+	b	L(loop)	      /* We branch here (rather than falling through)
+				 to skip the nops due to heavy alignment
+				 of the loop below.  */
+
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the null-checking process for bigger strings.  */
+	ld	r12,8(r8)
+	ldu	r9,16(r8)
+	cmpb	r10,r12,r4
+	cmpb	r11,r12,r0
+	cmpb	r6,r9,r4
+	cmpb	r7,r9,r0
+	or	r12,r10,r11
+	or	r9,r6,r7
+	or	r5,r12,r9
+	cmpdi	cr7,r5,0
+	beq	cr7,L(loop)
+
+	/* OK, one (or both) of the doublewords contains a c/null byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a c/null byte.  */
+
+	cmpdi	cr6,r12,0
+	addi	r8,r8,-8
+	bne	cr6,L(done)
+
+	/* The c/null byte must be in the second doubleword.  Adjust the
+	   address again and move the result of cmpb to r10 so we can calculate
+	   the pointer.  */
+
+	mr	r10,r6
+	mr	r11,r7
+	addi	r8,r8,8
+
+	/* r5 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the c/null byte in the original
+	   doubleword from the string.  Use that to calculate the pointer.  */
+L(done):
+	cntlzd	r4,r10	      /* Count leading zeroes before c matches.  */
+	cntlzd	r0,r11	      /* Count leading zeroes before null matches.  */
+	cmpld	cr7,r4,r0
+	bgt	cr7,L(no_match)
+	srdi	r0,r4,3	      /* Convert leading zeroes to bytes.  */
+	add	r3,r8,r0      /* Return address of the matching c byte
+				 or null in case c was not found.  */
+	blr
+
+	.align	4
+L(no_match):
+	li	r3,0
+	blr
+
+/* We are here because strchr was called with a null byte.  */
+	.align	4
+L(null_match):
+	/* r0 has a doubleword of null bytes.  */
+
+	cmpb	r5,r12,r0     /* Compare each byte against null bytes.  */
+
+	/* Move the doublewords left and right to discard the bits that are
+	   not part of the string and bring them back as zeros.  */
+
+	sld	r5,r5,r6
+	srd	r5,r5,r6
+	cmpdi	cr7,r5,0      /* If r10 == 0, no c or null bytes
+				 have been found.  */
+	bne	cr7,L(done_null)
+
+	mtcrf   0x01,r8
+
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop_null)
+
+	/* Handle WORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb    r5,r12,r0
+	cmpdi	cr7,r5,0
+	bne	cr7,L(done_null)
+	b	L(loop_null)  /* We branch here (rather than falling through)
+				 to skip the nops due to heavy alignment
+				 of the loop below.  */
+
+	/* Main loop to look for the end of the string.  Since it's a
+	   small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop_null):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the null-checking process for bigger strings.  */
+	ld	r12,8(r8)
+	ldu     r11,16(r8)
+	cmpb	r5,r12,r0
+	cmpb	r10,r11,r0
+	or	r6,r5,r10
+	cmpdi	cr7,r6,0
+	beq	cr7,L(loop_null)
+
+	/* OK, one (or both) of the doublewords contains a null byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a null byte.  */
+
+	cmpdi	cr6,r5,0
+	addi	r8,r8,-8
+	bne	cr6,L(done_null)
+
+	/* The null byte must be in the second doubleword.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   pointer.  */
+
+	mr	r5,r10
+	addi	r8,r8,8
+
+	/* r5 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the null byte in the original
+	   doubleword from the string.  Use that to calculate the pointer.  */
+L(done_null):
+	cntlzd	r0,r5	      /* Count leading zeros before the match.  */
+	srdi	r0,r0,3	      /* Convert leading zeros to bytes.  */
+	add	r3,r8,r0      /* Return address of the matching null byte.  */
+	blr
+END (BP_SYM (strchr))
+weak_alias (BP_SYM (strchr), BP_SYM (index))
+libc_hidden_builtin_def (strchr)
diff --git a/sysdeps/powerpc/powerpc64/power7/strchrnul.S b/sysdeps/powerpc/powerpc64/power7/strchrnul.S
new file mode 100644
index 0000000000..2401154a60
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/strchrnul.S
@@ -0,0 +1,118 @@
+/* Optimized strchrnul implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] strchrnul (char *s [r3], int c [r4])  */
+	.machine  power7
+ENTRY (BP_SYM(__strchrnul))
+	CALL_MCOUNT 2
+	dcbt	0,r3
+	clrrdi	r8,r3,3	      /* Align the address to doubleword boundary.  */
+
+	/* Replicate byte to doubleword.  */
+	rlwimi	r4,r4,8,16,23
+	rlwimi	r4,r4,16,0,15
+	insrdi	r4,r4,32,0
+
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load doubleword from memory.  */
+	li	r0,0	      /* Doubleword with null chars to use
+				 with cmpb.  */
+
+	/* Now r4 has a doubleword of c bytes and r0 has
+	   a doubleword of null bytes.  */
+
+	cmpb	r10,r12,r0    /* Compare each byte against c byte.  */
+	cmpb	r9,r12,r4     /* Compare each byte against null byte.  */
+
+	/* Move the doublewords left and right to discard the bits that are
+	   not part of the string and to bring them back as zeros.  */
+	sld	r10,r10,r6
+	sld	r9,r9,r6
+	srd	r10,r10,r6
+	srd	r9,r9,r6
+	or	r5,r9,r10     /* OR the results to speed things up.  */
+	cmpdi	cr7,r5,0      /* If r5 == 0, no c or null bytes
+				 have been found.  */
+	bne	cr7,L(done)
+
+	mtcrf   0x01,r8
+
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop)
+
+	/* Handle DWORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb	r10,r12,r0
+	cmpb	r9,r12,r4
+	or	r5,r9,r10
+	cmpdi	cr7,r5,0
+	bne	cr7,L(done)
+	b	L(loop)	      /* We branch here (rather than falling through)
+				 to skip the nops due to heavy alignment
+				 of the loop below.  */
+
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the null-checking process for bigger strings.  */
+	ld	r12,8(r8)
+	ldu     r11,16(r8)
+	cmpb	r10,r12,r0
+	cmpb	r9,r12,r4
+	cmpb	r6,r11,r0
+	cmpb	r7,r11,r4
+	or	r5,r9,r10
+	or	r10,r6,r7
+	or	r11,r5,r10
+	cmpdi	cr7,r11,0
+	beq	cr7,L(loop)
+
+	/* OK, one (or both) of the doublewords contains a c/null byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a c/null byte.  */
+
+	cmpdi	cr6,r5,0
+	addi	r8,r8,-8
+	bne	cr6,L(done)
+
+	/* The c/null byte must be in the second doubleword.  Adjust the
+	   address again and move the result of cmpb to r10 so we can calculate
+	   the pointer.  */
+	mr	r5,r10
+	addi	r8,r8,8
+
+	/* r5 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the c/null byte in the original
+	   doubleword from the string.  Use that to calculate the pointer.  */
+L(done):
+	cntlzd	r0,r5	      /* Count leading zeros before the match.  */
+	srdi	r0,r0,3	      /* Convert leading zeros to bytes.  */
+	add	r3,r8,r0      /* Return address of matching c/null byte.  */
+	blr
+END (BP_SYM (__strchrnul))
+weak_alias (__strchrnul,strchrnul)
+libc_hidden_builtin_def (__strchrnul)
diff --git a/sysdeps/powerpc/powerpc64/power7/strlen.S b/sysdeps/powerpc/powerpc64/power7/strlen.S
new file mode 100644
index 0000000000..b45b4dd124
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/strlen.S
@@ -0,0 +1,99 @@
+/* Optimized strlen implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] strlen (char *s [r3])  */
+	.machine  power7
+ENTRY (BP_SYM (strlen))
+	CALL_MCOUNT 1
+	dcbt	0,r3
+	clrrdi	r4,r3,3	      /* Align the address to doubleword boundary.  */
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	li	r0,0	      /* Doubleword with null chars to use
+				 with cmpb.  */
+	li	r5,-1	      /* MASK = 0xffffffffffffffff.  */
+	ld	r12,0(r4)     /* Load doubleword from memory.  */
+	srd	r5,r5,r6      /* MASK = MASK >> padding.  */
+	orc	r9,r12,r5     /* Mask bits that are not part of the string.  */
+	cmpb	r10,r9,r0     /* Check for null bytes in DWORD1.  */
+	cmpdi	cr7,r10,0     /* If r10 == 0, no null's have been found.  */
+	bne	cr7,L(done)
+
+	mtcrf   0x01,r4
+
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop)
+
+	/* Handle DWORD2 of pair.  */
+	ldu	r12,8(r4)
+	cmpb	r10,r12,r0
+	cmpdi	cr7,r10,0
+	bne	cr7,L(done)
+	b	L(loop)	      /* We branch here (rather than falling through)
+				 to skip the nops due to heavy alignment
+				 of the loop below.  */
+
+	/* Main loop to look for the end of the string.  Since it's a
+	   small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the null-checking process for bigger strings.  */
+
+	ld	r12, 8(r4)
+	ldu	r11, 16(r4)
+	cmpb	r10,r12,r0
+	cmpb	r9,r11,r0
+	or	r8,r9,r10     /* Merge everything in one doubleword.  */
+	cmpdi	cr7,r8,0
+	beq	cr7,L(loop)
+
+	/* OK, one (or both) of the doublewords contains a null byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a null byte.  */
+
+	cmpdi	cr6,r10,0
+	addi	r4,r4,-8
+	bne	cr6,L(done)
+
+	/* The null byte must be in the second doubleword.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   length.  */
+
+	mr	r10,r9
+	addi	r4,r4,8
+
+	/* r10 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the null byte in the original
+	   doubleword from the string.  Use that to calculate the length.  */
+L(done):
+	cntlzd	r0,r10	      /* Count leading zeroes before the match.  */
+	subf	r5,r3,r4
+	srdi	r0,r0,3	      /* Convert leading zeroes to bytes.  */
+	add	r3,r5,r0      /* Compute final length.  */
+	blr
+END (BP_SYM (strlen))
+libc_hidden_builtin_def (strlen)
diff --git a/sysdeps/powerpc/powerpc64/power7/strnlen.S b/sysdeps/powerpc/powerpc64/power7/strnlen.S
new file mode 100644
index 0000000000..9fcf82633f
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/strnlen.S
@@ -0,0 +1,173 @@
+/* Optimized strnlen implementation for PowerPC64/POWER7 using cmpb insn.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
+
+/* int [r3] strnlen (char *s [r3], int size [r4])  */
+	.machine  power7
+ENTRY (BP_SYM (__strnlen))
+	CALL_MCOUNT 2
+	dcbt	0,r3
+	clrrdi  r8,r3,3
+	add	r7,r3,r4      /* Calculate the last acceptable address.  */
+	cmpldi	r4,32
+	li	r0,0	      /* Doubleword with null chars.  */
+	/* If we have less than 33 bytes to search, skip to a faster code.  */
+	ble	L(small_range)
+
+	cmpld	cr7,r3,r7    /* Is the address equal or less than r3?  If
+				it's equal or less, it means size is either 0
+				or a negative number.  */
+	ble	cr7,L(proceed)
+
+	li	r7,-1	      /* Make r11 the biggest if r4 <= 0.  */
+L(proceed):
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load doubleword from memory.  */
+	cmpb	r10,r12,r0    /* Check for null bytes in DWORD1.  */
+	sld	r10,r10,r6
+	srd	r10,r10,r6
+	cmpldi	cr7,r10,0     /* If r10 == 0, no null's have been found.  */
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	bge	cr6,L(end_max)
+
+	mtcrf   0x01,r8
+	/* Are we now aligned to a quadword boundary?  If so, skip to
+	   the main loop.  Otherwise, go through the alignment code.  */
+
+	bt	28,L(loop_setup)
+
+	/* Handle DWORD2 of pair.  */
+	ldu	r12,8(r8)
+	cmpb	r10,r12,r0
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	/* Are we done already?  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	bge	cr6,L(end_max)
+
+L(loop_setup):
+	sub	r5,r7,r9
+	srdi	r6,r5,4	      /* Number of loop iterations.  */
+	mtctr	r6	      /* Setup the counter.  */
+	b	L(loop)
+	/* Main loop to look for the null byte backwards in the string.  Since
+	   it's a small loop (< 8 instructions), align it to 32-bytes.  */
+	.p2align  5
+L(loop):
+	/* Load two doublewords, compare and merge in a
+	   single register for speed.  This is an attempt
+	   to speed up the null-checking process for bigger strings.  */
+
+	ld	r12,8(r8)
+	ldu	r11,16(r8)
+	cmpb	r10,r12,r0
+	cmpb	r9,r11,r0
+	or	r5,r9,r10     /* Merge everything in one doubleword.  */
+	cmpldi	cr7,r5,0
+	bne	cr7,L(found)
+	bdnz	L(loop)
+	/* We're here because the counter reached 0, and that means we
+	   didn't have any matches for null in the whole range.  Just return
+	   the original size.  */
+	addi	r9,r8,8
+	cmpld	cr6,r9,r7
+	blt	cr6,L(loop_small)
+
+L(end_max):
+	sub	r3,r7,r3
+	blr
+
+	/* OK, one (or both) of the doublewords contains a null byte.  Check
+	   the first doubleword and decrement the address in case the first
+	   doubleword really contains a null byte.  */
+	.align	4
+L(found):
+	cmpldi	cr6,r10,0
+	addi	r8,r8,-8
+	bne	cr6,L(done)
+
+	/* The null byte must be in the second doubleword.  Adjust the address
+	   again and move the result of cmpb to r10 so we can calculate the
+	   length.  */
+
+	mr	r10,r9
+	addi	r8,r8,8
+
+	/* r10 has the output of the cmpb instruction, that is, it contains
+	   0xff in the same position as the null byte in the original
+	   doubleword from the string.  Use that to calculate the length.
+	   We need to make sure the null char is *before* the start of the
+	   range (since we're going backwards).  */
+L(done):
+	cntlzd	r0,r10	      /* Count leading zeroes before the match.  */
+	srdi	r0,r0,3	      /* Convert leading zeroes to bytes.  */
+	add	r9,r8,r0
+	sub	r6,r9,r3      /* Length until the match.  */
+	cmpld	r9,r7
+	bgt	L(end_max)
+	mr	r3,r6
+	blr
+
+	.align	4
+L(zero):
+	li	r3,0
+	blr
+
+/* Deals with size <= 32.  */
+	.align	4
+L(small_range):
+	cmpldi	r4,0
+	beq	L(zero)
+
+	rlwinm	r6,r3,3,26,28 /* Calculate padding.  */
+	ld	r12,0(r8)     /* Load word from memory.  */
+	cmpb	r10,r12,r0    /* Check for null bytes in DWORD1.  */
+	sld	r10,r10,r6
+	srd	r10,r10,r6
+	cmpldi	cr7,r10,0
+	bne	cr7,L(done)
+
+	addi    r9,r8,8
+	cmpld	r9,r7
+	bge	L(end_max)
+	b	L(loop_small)
+
+	.p2align  5
+L(loop_small):
+	ldu	r12,8(r8)
+	cmpb	r10,r12,r0
+	addi	r9,r8,8
+	cmpldi	cr6,r10,0
+	bne	cr6,L(done)
+	cmpld	r9,r7
+	bge	L(end_max)
+	b	L(loop_small)
+END (BP_SYM (__strnlen))
+weak_alias (BP_SYM (__strnlen), BP_SYM(strnlen))
+libc_hidden_builtin_def (strnlen)