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// $Id: savegpr.S,v 1.1.1.1 2013/12/11 21:03:25 bcbrock Exp $
// $Source: /afs/awd/projects/eclipz/KnowledgeBase/.cvsroot/eclipz/chips/p8/working/procedures/ssx/ppc32/savegpr.S,v $
//-----------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2013
// *! All Rights Reserved -- Property of IBM
// *! *** IBM Confidential ***
//-----------------------------------------------------------------------------
///
/// \file savegpr.S
/// \brief Push registers onto or load registers from the stack
///
/// This code was developed due to missing references to _savegpr_{X}
/// and _restgpr_{X}_x that surfaced when moving to GCC 4.5.1 and
/// using the -Os optimization level.
///
/// The open-source code was viewed to get the spec, but no
/// code was copied.
///
.macro SAVE reg
.global _savegpr_\reg
_savegpr_\reg\():
stw \reg,(((31-\reg)*4 +4)*-1)(11)
.endm
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.macro RESTX reg
.global _restgpr_\reg\()_x
_restgpr_\reg\()_x:
.ifeq (31-\reg)
lwz 0,4(11)
.endif
lwz \reg,(((31-\reg)*4 +4)*-1)(11)
.endm
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mtlr 0
mr 1,11
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