Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / frv / lib / __ashrdi3.S

diff --git a/kernel/arch/frv/lib/__ashrdi3.S b/kernel/arch/frv/lib/__ashrdi3.S
new file mode 100644 (file)
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--- /dev/null
+++ b/kernel/arch/frv/lib/__ashrdi3.S
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+/* __ashrdi3.S:        64-bit arithmetic shift right
+ *
+ * Copyright (C) 2003 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
+
+###############################################################################
+#
+# signed long long __ashrdi3(signed long long value [GR8:GR9], unsigned by [GR10])
+#
+###############################################################################
+        .globl         __ashrdi3
+        .type          __ashrdi3,@function
+__ashrdi3:
+       andicc.p        gr10,#63,gr10,icc0
+       setlos          #32,gr5
+       andicc.p        gr10,#32,gr0,icc1
+       beqlr           icc0,#0
+       setlos.p        #31,gr6
+       ckeq            icc1,cc4                        ; cc4 is true if 0<N<32
+
+       # deal with a shift in the range 1<=N<=31
+       csrl.p          gr9,gr10,gr9    ,cc4,#1         ; LSW >>= N
+       csub            gr5,gr10,gr5    ,cc4,#1         ; M = 32 - N
+       csll.p          gr8,gr5,gr4     ,cc4,#1
+       csra            gr8,gr10,gr8    ,cc4,#1         ; MSW >>= N
+       cor.p           gr4,gr9,gr9     ,cc4,#1         ; LSW |= MSW << M
+
+       # deal with a shift in the range 32<=N<=63
+       csra            gr8,gr10,gr9    ,cc4,#0         ; LSW = MSW >> (N & 31 [implicit AND])
+       csra.p          gr8,gr6,gr8     ,cc4,#0         ; MSW >>= 31
+       bralr
+       .size           __ashrdi3, .-__ashrdi3