From e130b681c43ee2215512ffcf6cadcbc4487e96e6 Mon Sep 17 00:00:00 2001
From: Carmelo Amoroso <carmelo.amoroso@st.com>
Date: Fri, 16 Nov 2007 14:26:46 +0000
Subject: Added AVR32 support to uClibc. Signed-off-by: Hans-Christian Egtvedt
 <hcegtvedt@atmel.com>

---
 libc/string/avr32/strcmp.S | 91 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 libc/string/avr32/strcmp.S

(limited to 'libc/string/avr32/strcmp.S')

diff --git a/libc/string/avr32/strcmp.S b/libc/string/avr32/strcmp.S
new file mode 100644
index 000000000..e9f087577
--- /dev/null
+++ b/libc/string/avr32/strcmp.S
@@ -0,0 +1,91 @@
+/*
+ * 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 strcmp
+       .type   strcmp, @function
+       .align  1
+strcmp:
+       mov     r8, 3
+       tst     s1, r8
+       brne    .Lunaligned_s1
+       tst     s2, r8
+       brne    .Lunaligned_s2
+
+1:     ld.w    r8, s1++
+       ld.w    r9, s2++
+       cp.w    r8, r9
+       brne    2f
+       tnbz    r8
+       brne    1b
+       retal   0
+
+2:     bfextu  r12, r8, 24, 8
+       bfextu  r11, r9, 24, 8
+       sub     r12, r11
+       retne   r12
+       cp.w    r11, 0
+       reteq   0
+       bfextu  r12, r8, 16, 8
+       bfextu  r11, r9, 16, 8
+       sub     r12, r11
+       retne   r12
+       cp.w    r11, 0
+       reteq   0
+       bfextu  r12, r8, 8, 8
+       bfextu  r11, r9, 8, 8
+       sub     r12, r11
+       retne   r12
+       cp.w    r11, 0
+       reteq   0
+       bfextu  r12, r8, 0, 8
+       bfextu  r11, r9, 0, 8
+       sub     r12, r11
+       retal   r12
+
+.Lunaligned_s1:
+3:     tst     s1, r8
+       breq    4f
+       ld.ub   r10, s1++
+       ld.ub   r9, s2++
+       sub     r10, r9
+       retne   r10
+       cp.w    r9, 0
+       brne    3b
+       retal   r10
+
+4:     tst     s2, r8
+       breq    1b
+
+.Lunaligned_s2:
+       /*
+        * s1 and s2 can't both be aligned, and unaligned word loads
+        * can trigger spurious exceptions if we cross a page boundary.
+        * Do it the slow way...
+        */
+1:     ld.ub   r8, s1++
+       ld.ub   r9, s2++
+       sub     r8, r9
+       retne   r8
+       cp.w    r9, 0
+       brne    1b
+       retal   0
+
+       .size   strcmp, . - strcmp
+
+libc_hidden_def(strcmp)
+#ifndef __UCLIBC_HAS_LOCALE__
+strong_alias(strcmp, strcoll)
+libc_hidden_def(strcoll)
+#endif
-- 
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