From e130b681c43ee2215512ffcf6cadcbc4487e96e6 Mon Sep 17 00:00:00 2001 From: Carmelo Amoroso Date: Fri, 16 Nov 2007 14:26:46 +0000 Subject: Added AVR32 support to uClibc. Signed-off-by: Hans-Christian Egtvedt --- libc/string/avr32/memset.S | 70 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 libc/string/avr32/memset.S (limited to 'libc/string/avr32/memset.S') diff --git a/libc/string/avr32/memset.S b/libc/string/avr32/memset.S new file mode 100644 index 000000000..ca5b53a1a --- /dev/null +++ b/libc/string/avr32/memset.S @@ -0,0 +1,70 @@ +/* + * Copyright (C) 2004-2007 Atmel Corporation + * + * This file is subject to the terms and conditions of the GNU Lesser General + * Public License. See the file "COPYING.LIB" in the main directory of this + * archive for more details. + */ + +#include + +#define s r12 +#define c r11 +#define n r10 + + .text + .global memset + .type memset, @function + + .global __memset + .hidden __memset + .type __memset, @function + + .align 1 +memset: +__memset: + cp.w n, 32 + mov r9, s + brge .Llarge_memset + + sub n, 1 + retlt s +1: st.b s++, c + sub n, 1 + brge 1b + + retal r9 + +.Llarge_memset: + mov r8, r11 + mov r11, 3 + bfins r8, r8, 8, 8 + bfins r8, r8, 16, 16 + tst s, r11 + breq 2f + +1: st.b s++, r8 + sub n, 1 + tst s, r11 + brne 1b + +2: mov r11, r9 + mov r9, r8 + sub n, 8 + +3: st.d s++, r8 + sub n, 8 + brge 3b + + /* If we are done, n == -8 and we'll skip all st.b insns below */ + neg n + lsl n, 1 + add pc, n + .rept 7 + st.b s++, r8 + .endr + retal r11 + + .size memset, . - memset + +libc_hidden_def(memset) -- cgit v1.2.3