diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/476/memset.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/476/memset.S | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/sysdeps/powerpc/powerpc32/476/memset.S b/sysdeps/powerpc/powerpc32/476/memset.S deleted file mode 100644 index 17c91238e1..0000000000 --- a/sysdeps/powerpc/powerpc32/476/memset.S +++ /dev/null @@ -1,152 +0,0 @@ -/* Optimized memset for PowerPC476 (128-byte cacheline). - 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> - -/* memset - - r3:destination address and return address - r4:source integer to copy - r5:byte count - r11:sources integer to copy in all 32 bits of reg - r12:temp return address - - Save return address in r12 - If destinationn is unaligned and count is greater tha 255 bytes - set 0-3 bytes to make destination aligned - If count is greater tha 255 bytes and setting zero to memory - use dbcz to set memeory when we can - otherwsie do the follwoing - If 16 or more words to set we use 16 word copy loop. - Finaly we set 0-15 extra bytes with string store. */ - -EALIGN (memset, 5, 0) - rlwinm r11,r4,0,24,31 - rlwimi r11,r4,8,16,23 - rlwimi r11,r11,16,0,15 - addi r12,r3,0 - cmpwi r5,0x00FF - ble L(preword8_count_loop) - cmpwi r4,0x00 - beq L(use_dcbz) - neg r6,r3 - clrlwi. r6,r6,30 - beq L(preword8_count_loop) - addi r8,0,1 - mtctr r6 - subi r3,r3,1 - -L(unaligned_bytecopy_loop): - stbu r11,0x1(r3) - subf. r5,r8,r5 - beq L(end_memset) - bdnz L(unaligned_bytecopy_loop) - addi r3,r3,1 - -L(preword8_count_loop): - srwi. r6,r5,4 - beq L(preword2_count_loop) - mtctr r6 - addi r3,r3,-4 - mr r8,r11 - mr r9,r11 - mr r10,r11 - -L(word8_count_loop_no_dcbt): - stwu r8,4(r3) - stwu r9,4(r3) - subi r5,r5,0x10 - stwu r10,4(r3) - stwu r11,4(r3) - bdnz L(word8_count_loop_no_dcbt) - addi r3,r3,4 - -L(preword2_count_loop): - clrlwi. r7,r5,28 - beq L(end_memset) - mr r8,r11 - mr r9,r11 - mr r10,r11 - mtxer r7 - stswx r8,0,r3 - -L(end_memset): - addi r3,r12,0 - blr - -L(use_dcbz): - neg r6,r3 - clrlwi. r7,r6,28 - beq L(skip_string_loop) - mr r8,r11 - mr r9,r11 - mr r10,r11 - subf r5,r7,r5 - mtxer r7 - stswx r8,0,r3 - add r3,r3,r7 - -L(skip_string_loop): - clrlwi r8,r6,25 - srwi. r8,r8,4 - beq L(dcbz_pre_loop) - mtctr r8 - -L(word_loop): - stw r11,0(r3) - subi r5,r5,0x10 - stw r11,4(r3) - stw r11,8(r3) - stw r11,12(r3) - addi r3,r3,0x10 - bdnz L(word_loop) - -L(dcbz_pre_loop): - srwi r6,r5,7 - mtctr r6 - addi r7,0,0 - -L(dcbz_loop): - dcbz r3,r7 - addi r3,r3,0x80 - subi r5,r5,0x80 - bdnz L(dcbz_loop) - srwi. r6,r5,4 - beq L(postword2_count_loop) - mtctr r6 - -L(postword8_count_loop): - stw r11,0(r3) - subi r5,r5,0x10 - stw r11,4(r3) - stw r11,8(r3) - stw r11,12(r3) - addi r3,r3,0x10 - bdnz L(postword8_count_loop) - -L(postword2_count_loop): - clrlwi. r7,r5,28 - beq L(end_memset) - mr r8,r11 - mr r9,r11 - mr r10,r11 - mtxer r7 - stswx r8,0,r3 - b L(end_memset) -END (memset) -libc_hidden_builtin_def (memset) |