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authorJonathan Corbet <corbet@lwn.net>2008-07-14 15:29:34 -0600
committerJonathan Corbet <corbet@lwn.net>2008-07-14 15:29:34 -0600
commit2fceef397f9880b212a74c418290ce69e7ac00eb (patch)
treed9cc09ab992825ef7fede4a688103503e3caf655 /arch/mn10300/lib/__ucmpdi2.S
parentfeae1ef116ed381625d3731c5ae4f4ebcb3fa302 (diff)
parentbce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff)
Merge commit 'v2.6.26' into bkl-removal
Diffstat (limited to 'arch/mn10300/lib/__ucmpdi2.S')
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1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mn10300/lib/__ucmpdi2.S b/arch/mn10300/lib/__ucmpdi2.S
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+/* __ucmpdi2.S: 64-bit unsigned compare
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+ .text
+ .p2align 4
+
+###############################################################################
+#
+# int __ucmpdi2(unsigned long long a [D0:D1],
+# unsigned long long b [(SP,12),(SP,16)])
+#
+# - returns 0, 1, or 2 as a <, =, > b respectively.
+#
+###############################################################################
+ .globl __ucmpdi2
+ .type __ucmpdi2,@function
+__ucmpdi2:
+ mov (12,sp),a0 # b.lsw
+ mov (16,sp),a1 # b.msw
+
+ sub a0,d0
+ subc a1,d1 # may clear Z, never sets it
+ bne __ucmpdi2_differ # a.msw != b.msw
+ mov +1,d0
+ rets
+
+__ucmpdi2_differ:
+ # C flag is set if LE, clear if GE
+ subc d0,d0 # -1 if LE, 0 if GE
+ add +1,d0 # 0 if LE, 1 if GE
+ add d0,d0 # 0 if LE, 2 if GE
+ rets
+
+ .size __ucmpdi2, .-__ucmpdi2