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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/frv/lib/__ashldi3.S
downloadconfigs-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+/* __ashldi3.S: 64-bit arithmetic shift left
+ *
+ * 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 __ashldi3(unsigned long long value [GR8:GR9], unsigned by [GR10])
+#
+###############################################################################
+ .globl __ashldi3
+ .type __ashldi3,@function
+__ashldi3:
+ 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
+ csll.p gr8,gr10,gr8 ,cc4,#1 ; MSW <<= N
+ csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N
+ csrl.p gr9,gr5,gr4 ,cc4,#1
+ csll gr9,gr10,gr9 ,cc4,#1 ; LSW <<= N
+ cor.p gr4,gr8,gr8 ,cc4,#1 ; MSW |= LSW >> M
+
+ # deal with a shift in the range 32<=N<=63
+ csll gr9,gr10,gr8 ,cc4,#0 ; MSW = LSW << (N & 31 [implicit AND])
+ cor.p gr0,gr0,gr9 ,cc4,#0 ; LSW = 0
+ bralr
+ .size __ashldi3, .-__ashldi3