summaryrefslogtreecommitdiffstats
path: root/arch/frv/lib/__lshrdi3.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/frv/lib/__lshrdi3.S')
-rw-r--r--arch/frv/lib/__lshrdi3.S40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/frv/lib/__lshrdi3.S b/arch/frv/lib/__lshrdi3.S
new file mode 100644
index 000000000000..7b41f6304f04
--- /dev/null
+++ b/arch/frv/lib/__lshrdi3.S
@@ -0,0 +1,40 @@
+/* __lshrdi3.S: 64-bit logical 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
+
+###############################################################################
+#
+# unsigned long long __lshrdi3(unsigned long long value [GR8:GR9], unsigned by [GR10])
+#
+###############################################################################
+ .globl __lshrdi3
+ .type __lshrdi3,@function
+__lshrdi3:
+ andicc.p gr10,#63,gr10,icc0
+ setlos #32,gr5
+ andicc.p gr10,#32,gr0,icc1
+ beqlr icc0,#0
+ 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
+ csrl 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
+ csrl gr8,gr10,gr9 ,cc4,#0 ; LSW = MSW >> (N & 31 [implicit AND])
+ cor.p gr0,gr0,gr8 ,cc4,#0 ; MSW = 0
+ bralr
+ .size __lshrdi3, .-__lshrdi3