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Diffstat (limited to 'sysdeps/powerpc/powerpc32/405/memcpy.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/405/memcpy.S | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/sysdeps/powerpc/powerpc32/405/memcpy.S b/sysdeps/powerpc/powerpc32/405/memcpy.S deleted file mode 100644 index 9878dbceac..0000000000 --- a/sysdeps/powerpc/powerpc32/405/memcpy.S +++ /dev/null @@ -1,130 +0,0 @@ -/* Optimized memcpy 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> - -/* memcpy - - r0:return address - r3:destination address - r4:source address - r5:byte count - - Save return address in r0. - If destinationn and source are unaligned and copy count is greater than 256 - then copy 0-3 bytes to make destination aligned. - If 32 or more bytes to copy we use 32 byte copy loop. - Finaly we copy 0-31 extra bytes. */ - -EALIGN (memcpy, 5, 0) -/* Check if bytes to copy are greater than 256 and if - source and destination are unaligned */ - cmpwi r5,0x0100 - addi r0,r3,0 - ble L(string_count_loop) - neg r6,r3 - clrlwi. r6,r6,30 - beq L(string_count_loop) - neg r6,r4 - clrlwi. r6,r6,30 - beq L(string_count_loop) - mtctr r6 - subf r5,r6,r5 - -L(unaligned_bytecopy_loop): /* Align destination by coping 0-3 bytes */ - lbz r8,0x0(r4) - addi r4,r4,1 - stb r8,0x0(r3) - addi r3,r3,1 - bdnz L(unaligned_bytecopy_loop) - srwi. r7,r5,5 - beq L(preword2_count_loop) - mtctr r7 - -L(word8_count_loop_no_dcbt): /* Copy 32 bytes at a time */ - lwz r6,0(r4) - lwz r7,4(r4) - lwz r8,8(r4) - lwz r9,12(r4) - subi r5,r5,0x20 - stw r6,0(r3) - stw r7,4(r3) - stw r8,8(r3) - stw r9,12(r3) - lwz r6,16(r4) - lwz r7,20(r4) - lwz r8,24(r4) - lwz r9,28(r4) - addi r4,r4,0x20 - stw r6,16(r3) - stw r7,20(r3) - stw r8,24(r3) - stw r9,28(r3) - addi r3,r3,0x20 - bdnz L(word8_count_loop_no_dcbt) - -L(preword2_count_loop): /* Copy remaining 0-31 bytes */ - clrlwi. r12,r5,27 - beq L(end_memcpy) - mtxer r12 - lswx r5,0,r4 - stswx r5,0,r3 - mr r3,r0 - blr - -L(string_count_loop): /* Copy odd 0-31 bytes */ - clrlwi. r12,r5,28 - add r3,r3,r5 - add r4,r4,r5 - beq L(pre_string_copy) - mtxer r12 - subf r4,r12,r4 - subf r3,r12,r3 - lswx r6,0,r4 - stswx r6,0,r3 - -L(pre_string_copy): /* Check how many 32 byte chunks to copy */ - srwi. r7,r5,4 - beq L(end_memcpy) - mtctr r7 - -L(word4_count_loop_no_dcbt): /* Copy 32 bytes at a time */ - lwz r6,-4(r4) - lwz r7,-8(r4) - lwz r8,-12(r4) - lwzu r9,-16(r4) - stw r6,-4(r3) - stw r7,-8(r3) - stw r8,-12(r3) - stwu r9,-16(r3) - bdz L(end_memcpy) - lwz r6,-4(r4) - lwz r7,-8(r4) - lwz r8,-12(r4) - lwzu r9,-16(r4) - stw r6,-4(r3) - stw r7,-8(r3) - stw r8,-12(r3) - stwu r9,-16(r3) - bdnz L(word4_count_loop_no_dcbt) - -L(end_memcpy): - mr r3,r0 - blr -END (memcpy) -libc_hidden_builtin_def (memcpy) |