diff options
| author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:04 -0500 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:03 +0200 |
| commit | ea0364f1bbfed1e3ea711147420875cf338fe77a (patch) | |
| tree | 15c051bc4d2e94c1661c73e1b87c22c7beda7c24 /arch/avr32/lib/memset.S | |
| parent | 89f39e177e7b0152aa1d3152baa25d986e36cdcf (diff) | |
Move lib_$ARCH directories to arch/$ARCH/lib
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk
This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/avr32/lib/memset.S')
| -rw-r--r-- | arch/avr32/lib/memset.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/avr32/lib/memset.S b/arch/avr32/lib/memset.S new file mode 100644 index 0000000000..79e3c675a9 --- /dev/null +++ b/arch/avr32/lib/memset.S @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + /* + * r12: void *b + * r11: int c + * r10: size_t len + * + * Returns b in r12 + */ + .section .text.memset, "ax", @progbits + + .global memset + .type memset, @function + .align 2 +memset: + mov r9, r12 + mov r8, r12 + or r11, r11, r11 << 8 + andl r9, 3, COH + brne 1f + +2: or r11, r11, r11 << 16 + sub r10, 4 + brlt 5f + + /* Let's do some real work */ +4: st.w r8++, r11 + sub r10, 4 + brge 4b + + /* + * When we get here, we've got less than 4 bytes to set. r10 + * might be negative. + */ +5: sub r10, -4 + reteq r12 + + /* Fastpath ends here, exactly 32 bytes from memset */ + + /* Handle unaligned count or pointer */ + bld r10, 1 + brcc 6f + st.b r8++, r11 + st.b r8++, r11 + bld r10, 0 + retcc r12 +6: st.b r8++, r11 + mov pc, lr + + /* Handle unaligned pointer */ +1: sub r10, 4 + brlt 5b + add r10, r9 + lsl r9, 1 + add pc, r9 + st.b r8++, r11 + st.b r8++, r11 + st.b r8++, r11 + rjmp 2b + + .size memset, . - memset |