diff options
| author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2007-11-16 14:26:46 +0000 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2007-11-16 14:26:46 +0000 |
| commit | e130b681c43ee2215512ffcf6cadcbc4487e96e6 (patch) | |
| tree | 107831cfb61595a907dff264d1bdbf02e18c53f5 /libc/string/avr32/memcmp.S | |
| parent | c08b07bc9bff10988100653d280e8afe428249f7 (diff) | |
Added AVR32 support to uClibc. Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Diffstat (limited to 'libc/string/avr32/memcmp.S')
| -rw-r--r-- | libc/string/avr32/memcmp.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/libc/string/avr32/memcmp.S b/libc/string/avr32/memcmp.S new file mode 100644 index 000000000..5d7eac3d9 --- /dev/null +++ b/libc/string/avr32/memcmp.S @@ -0,0 +1,61 @@ +/* + * 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 <features.h> + +#define s1 r12 +#define s2 r11 +#define len r10 + + .text + .global memcmp + .type memcmp, @function + .align 1 +memcmp: + sub len, 4 + brlt .Lless_than_4 + +1: ld.w r8, s1++ + ld.w r9, s2++ + cp.w r8, r9 + brne .Lfound_word + sub len, 4 + brge 1b + +.Lless_than_4: + sub len, -4 + reteq 0 + +1: ld.ub r8, s1++ + ld.ub r9, s2++ + sub r8, r9 + retne r8 + sub len, 1 + brgt 1b + + retal 0 + +.Lfound_word: + mov len, 4 + +2: bfextu r11, r9, 24, 8 + bfextu r12, r8, 24, 8 + sub r12, r11 + retne r12 + lsl r8, 8 + lsl r9, 8 + sub len, 1 + brne 2b + retal r12 + + .size memcmp, . - memcmp + +libc_hidden_def(memcmp) +#ifdef __UCLIBC_SUSV3_LEGACY__ +strong_alias(memcmp,bcmp) +#endif |