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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/ssx/ppc32/savegpr.S $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2014,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
//-----------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2014
// *! 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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