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/* This file contains the floating-point save and restore routines.
*
* Copyright (C) 2004 Free Software Foundation, Inc.
*
* This file 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, or (at your option) any
* later version.
*
* In addition to the permissions in the GNU General Public License, the
* Free Software Foundation gives you unlimited permission to link the
* compiled version of this file with other programs, and to distribute
* those programs without any restriction coming from the use of this
* file. (The General Public License restrictions do apply in other
* respects; for example, they cover modification of the file, and
* distribution when not linked into another program.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* As a special exception, if you link this library with files
* compiled with GCC to produce an executable, this does not cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
/* THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
for example. For FP reg saves/restores, it takes one instruction
(4 bytes) to do the operation; for Vector regs, 2 instructions are
required (8 bytes.)
MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS! */
#include "darwin-asm.h"
.text
.align 2
/* saveFP saves R0 -- assumed to be the callers LR -- to 8/16(R1). */
.private_extern saveFP
saveFP:
stfd f14,-144(r1)
stfd f15,-136(r1)
stfd f16,-128(r1)
stfd f17,-120(r1)
stfd f18,-112(r1)
stfd f19,-104(r1)
stfd f20,-96(r1)
stfd f21,-88(r1)
stfd f22,-80(r1)
stfd f23,-72(r1)
stfd f24,-64(r1)
stfd f25,-56(r1)
stfd f26,-48(r1)
stfd f27,-40(r1)
stfd f28,-32(r1)
stfd f29,-24(r1)
stfd f30,-16(r1)
stfd f31,-8(r1)
stg r0,SAVED_LR_OFFSET(r1)
blr
/* restFP restores the caller`s LR from 8/16(R1). Note that the code for
this starts at the offset of F30 restoration, so calling this
routine in an attempt to restore only F31 WILL NOT WORK (it would
be a stupid thing to do, anyway.) */
.private_extern restFP
restFP:
lfd f14,-144(r1)
lfd f15,-136(r1)
lfd f16,-128(r1)
lfd f17,-120(r1)
lfd f18,-112(r1)
lfd f19,-104(r1)
lfd f20,-96(r1)
lfd f21,-88(r1)
lfd f22,-80(r1)
lfd f23,-72(r1)
lfd f24,-64(r1)
lfd f25,-56(r1)
lfd f26,-48(r1)
lfd f27,-40(r1)
lfd f28,-32(r1)
lfd f29,-24(r1)
/* <OFFSET OF F30 RESTORE> restore callers LR */
lg r0,SAVED_LR_OFFSET(r1)
lfd f30,-16(r1)
/* and prepare for return to caller */
mtlr r0
lfd f31,-8(r1)
blr
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