Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mn10300 / lib / __lshrdi3.S

diff --git a/kernel/arch/mn10300/lib/__lshrdi3.S b/kernel/arch/mn10300/lib/__lshrdi3.S
new file mode 100644 (file)
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+++ b/kernel/arch/mn10300/lib/__lshrdi3.S
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+/* MN10300 64-bit logical right shift
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <asm/cache.h>
+
+        .text
+        .balign        L1_CACHE_BYTES
+
+###############################################################################
+#
+# unsigned long long __lshrdi3(unsigned long long value [D1:D0],
+#                             unsigned by [(12,SP)])
+#
+###############################################################################
+        .globl __lshrdi3
+        .type  __lshrdi3,@function
+__lshrdi3:
+       mov     (12,sp),a0
+       and     +63,a0
+       beq     __lshrdi3_zero
+
+       cmp     +31,a0
+       bhi     __lshrdi3_32plus
+
+       # the count is in the range 1-31
+       lsr     a0,d0
+
+       mov     +32,a1
+       sub     a0,a1,a1                        # a1 = 32 - count
+       asl     a1,d1,a1                        # get underflow from MSW -> LSW
+
+       or_lsr  a1,d0,a0,d1                     # insert underflow into LSW and
+                                               # shift the MSW
+       rets
+
+       .balign L1_CACHE_BYTES
+       # the count is in the range 32-63
+__lshrdi3_32plus:
+       lsr     a0,d1,d0
+       clr     d1
+__lshrdi3_zero:
+       rets
+
+       .size   __lshrdi3, .-__lshrdi3