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-rw-r--r--sysdeps/powerpc/powerpc32/405/strlen.S75
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diff --git a/sysdeps/powerpc/powerpc32/405/strlen.S b/sysdeps/powerpc/powerpc32/405/strlen.S
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--- a/sysdeps/powerpc/powerpc32/405/strlen.S
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-/* Optimized strlen implementation for PowerPC476.
- Copyright (C) 2010-2017 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
- <http://www.gnu.org/licenses/>. */
-
-#include <sysdep.h>
-
-/* strlen
-
- Register Use
- r3:source address and return length of string
- r4:byte counter
-
- Implementation description
- Load 2 words at a time and count bytes, if we find null we subtract one from
- the count and return the count value. We need to subtract one because
- we don't count the null character as a byte. */
-
-EALIGN (strlen,5,0)
- neg r7,r3
- clrlwi. r8,r7,29
- addi r4,0,0
- beq L(byte_count_loop)
- mtctr r8
-
-L(loop):
- lbz r5,0(r3)
- cmpi cr5,r5,0x0
- addi r3,r3,0x1
- addi r4,r4,0x1
- beq cr5,L(end_strlen)
- bdnz L(loop)
-
-L(byte_count_loop):
- lwz r5,0(r3)
- lwz r6,4(r3)
- dlmzb. r12,r5,r6
- add r4,r4,r12
- bne L(end_strlen)
- lwz r5,8(r3)
- lwz r6,12(r3)
- dlmzb. r12,r5,r6
- add r4,r4,r12
- bne L(end_strlen)
- lwz r5,16(r3)
- lwz r6,20(r3)
- dlmzb. r12,r5,r6
- add r4,r4,r12
- bne L(end_strlen)
- lwz r5,24(r3)
- lwz r6,28(r3)
- addi r3,r3,0x20
- dlmzb. r12,r5,r6
- add r4,r4,r12
- bne L(end_strlen)
- b L(byte_count_loop)
-
-L(end_strlen):
- addi r3,r4,-1
- blr
-END (strlen)
-libc_hidden_builtin_def (strlen)