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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/memset.S
parentc08b07bc9bff10988100653d280e8afe428249f7 (diff)
Added AVR32 support to uClibc. Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Diffstat (limited to 'libc/string/avr32/memset.S')
-rw-r--r--libc/string/avr32/memset.S70
1 files changed, 70 insertions, 0 deletions
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 <features.h>
+
+#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)