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Viewing changes to arch/frv/lib/__lshrdi3.S

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/frv/lib/__lshrdi3.S
 
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/* __lshrdi3.S: 64-bit logical shift right
 
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 *
 
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 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 
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 * Written by David Howells (dhowells@redhat.com)
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU General Public License
 
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 * as published by the Free Software Foundation; either version
 
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 * 2 of the License, or (at your option) any later version.
 
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 */
 
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        .text
 
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        .p2align        4
 
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###############################################################################
 
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#
 
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# unsigned long long __lshrdi3(unsigned long long value [GR8:GR9], unsigned by [GR10])
 
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#
 
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###############################################################################
 
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        .globl          __lshrdi3
 
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        .type           __lshrdi3,@function
 
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__lshrdi3:
 
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        andicc.p        gr10,#63,gr10,icc0
 
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        setlos          #32,gr5
 
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        andicc.p        gr10,#32,gr0,icc1
 
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        beqlr           icc0,#0
 
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        ckeq            icc1,cc4                        ; cc4 is true if 0<N<32
 
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        # deal with a shift in the range 1<=N<=31
 
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        csrl.p          gr9,gr10,gr9    ,cc4,#1         ; LSW >>= N
 
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        csub            gr5,gr10,gr5    ,cc4,#1         ; M = 32 - N
 
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        csll.p          gr8,gr5,gr4     ,cc4,#1
 
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        csrl            gr8,gr10,gr8    ,cc4,#1         ; MSW >>= N
 
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        cor.p           gr4,gr9,gr9     ,cc4,#1         ; LSW |= MSW << M
 
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        # deal with a shift in the range 32<=N<=63
 
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        csrl            gr8,gr10,gr9    ,cc4,#0         ; LSW = MSW >> (N & 31 [implicit AND])
 
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        cor.p           gr0,gr0,gr8     ,cc4,#0         ; MSW = 0
 
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        bralr
 
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        .size           __lshrdi3, .-__lshrdi3