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)