diff options
Diffstat (limited to 'arch/mn10300/lib/memset.S')
-rw-r--r-- | arch/mn10300/lib/memset.S | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/arch/mn10300/lib/memset.S b/arch/mn10300/lib/memset.S deleted file mode 100644 index bc02e39629b7..000000000000 --- a/arch/mn10300/lib/memset.S +++ /dev/null @@ -1,121 +0,0 @@ -/* Optimised simple memory fill - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <asm/cache.h> - - .section .text - .balign L1_CACHE_BYTES - -############################################################################### -# -# void *memset(void *dst, int c, size_t n) -# -############################################################################### - .globl memset - .type memset,@function -memset: - movm [d2,d3],(sp) - mov d0,(12,sp) - mov d1,(16,sp) - mov (20,sp),d2 # count - mov d0,a0 # dst - mov d0,e3 # the return value - - cmp +0,d2 - beq memset_done # return if zero-length fill - - # see if the region parameters are four-byte aligned - or d0,d2,d3 - and +3,d3 - bne memset_1 # jump if not - - extbu d1 - mov_asl d1,d3,8,d1 - or_asl d1,d3,8,d1 - or_asl d1,d3,8,d1 - or d3,d1 - - # we want to transfer as much as we can in chunks of 32 bytes - cmp +31,d2 - bls memset_4_remainder # 4-byte aligned remainder - - add -32,d2 - mov +32,d3 - -memset_4_loop: - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - - sub d3,d2 - bcc memset_4_loop - - add d3,d2 - beq memset_4_no_remainder - -memset_4_remainder: - # cut 4-7 words down to 0-3 - cmp +16,d2 - bcs memset_4_three_or_fewer_words - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - mov d1,(a0+) - add -16,d2 - beq memset_4_no_remainder - - # copy the remaining 1, 2 or 3 words -memset_4_three_or_fewer_words: - cmp +8,d2 - bcs memset_4_one_word - beq memset_4_two_words - mov d1,(a0+) -memset_4_two_words: - mov d1,(a0+) -memset_4_one_word: - mov d1,(a0+) - -memset_4_no_remainder: - # check we set the correct amount - # TODO: REMOVE CHECK - sub e3,a0,d2 - mov (20,sp),d1 - cmp d2,d1 - beq memset_done - break - break - break - -memset_done: - mov e3,a0 - ret [d2,d3],8 - - # handle misaligned copying -memset_1: - add -1,d2 - mov +1,d3 - setlb # setlb requires the next insns - # to occupy exactly 4 bytes - - sub d3,d2 - movbu d1,(a0) - inc a0 - lcc - - mov e3,a0 - ret [d2,d3],8 - -memset_end: - .size memset, memset_end-memset |