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authorCarmelo Amoroso <carmelo.amoroso@st.com>2007-11-16 14:26:46 +0000
committerCarmelo Amoroso <carmelo.amoroso@st.com>2007-11-16 14:26:46 +0000
commite130b681c43ee2215512ffcf6cadcbc4487e96e6 (patch)
tree107831cfb61595a907dff264d1bdbf02e18c53f5 /libc/string/avr32/memcmp.S
parentc08b07bc9bff10988100653d280e8afe428249f7 (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.S61
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