diff options
Diffstat (limited to 'arch/nds32/lib/memset.S')
| -rw-r--r-- | arch/nds32/lib/memset.S | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/arch/nds32/lib/memset.S b/arch/nds32/lib/memset.S deleted file mode 100644 index 193cb6ce21a9..000000000000 --- a/arch/nds32/lib/memset.S +++ /dev/null @@ -1,33 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (C) 2005-2017 Andes Technology Corporation - -#include <linux/linkage.h> - - .text -ENTRY(memset) - move $r5, $r0 ! Return value - beqz $r2, end_memset ! Exit when len = 0 - srli $p1, $r2, 2 ! $p1 is how many words to copy - andi $r2, $r2, 3 ! How many bytes are less than a word - beqz $p1, byte_set ! When n is less than a word - - ! set $r1 from ??????ab to abababab - andi $r1, $r1, #0x00ff ! $r1 = 000000ab - slli $p0, $r1, #8 ! $p0 = 0000ab00 - or $r1, $r1, $p0 ! $r1 = 0000abab - slli $p0, $r1, #16 ! $p0 = abab0000 - or $r1, $r1, $p0 ! $r1 = abababab -word_set: - addi $p1, $p1, #-1 ! How many words left to copy - smw.bim $r1, [$r0], $r1 ! Copy the word to det - bnez $p1, word_set ! Still words to set, continue looping - beqz $r2, end_memset ! No left byte to set -byte_set: ! Less than 4 bytes left to set - addi $r2, $r2, #-1 ! Decrease len by 1 - sbi.bi $r1, [$r0], #1 ! Set data of the next byte to $r1 - bnez $r2, byte_set ! Still bytes left to set -end_memset: - move $r0, $r5 - ret - -ENDPROC(memset) |