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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [rs6000/] [darwin-fpsave.asm] - Blame information for rev 414

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Line No. Rev Author Line
1 282 jeremybenn
/*  This file contains the floating-point save and restore routines.
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 *
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 *   Copyright (C) 2004, 2009 Free Software Foundation, Inc.
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 *
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 * This file is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License as published by the
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 * Free Software Foundation; either version 3, or (at your option) any
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 * later version.
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 *
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 * This file is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * General Public License for more details.
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 *
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 * Under Section 7 of GPL version 3, you are granted additional
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 * permissions described in the GCC Runtime Library Exception, version
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 * 3.1, as published by the Free Software Foundation.
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 *
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 * You should have received a copy of the GNU General Public License and
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 * a copy of the GCC Runtime Library Exception along with this program;
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 * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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 * .
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 */
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/* THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
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   ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
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   for example.  For FP reg saves/restores, it takes one instruction
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   (4 bytes) to do the operation; for Vector regs, 2 instructions are
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   required (8 bytes.)
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   MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS!  */
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#include "darwin-asm.h"
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.text
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        .align 2
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/* saveFP saves R0 -- assumed to be the callers LR -- to 8/16(R1).  */
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.private_extern saveFP
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saveFP:
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        stfd f14,-144(r1)
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        stfd f15,-136(r1)
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        stfd f16,-128(r1)
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        stfd f17,-120(r1)
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        stfd f18,-112(r1)
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        stfd f19,-104(r1)
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        stfd f20,-96(r1)
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        stfd f21,-88(r1)
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        stfd f22,-80(r1)
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        stfd f23,-72(r1)
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        stfd f24,-64(r1)
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        stfd f25,-56(r1)
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        stfd f26,-48(r1)
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        stfd f27,-40(r1)
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        stfd f28,-32(r1)
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        stfd f29,-24(r1)
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        stfd f30,-16(r1)
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        stfd f31,-8(r1)
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        stg  r0,SAVED_LR_OFFSET(r1)
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        blr
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/* restFP restores the caller`s LR from 8/16(R1).  Note that the code for
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   this starts at the offset of F30 restoration, so calling this
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   routine in an attempt to restore only F31 WILL NOT WORK (it would
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   be a stupid thing to do, anyway.)  */
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.private_extern restFP
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restFP:
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        lfd f14,-144(r1)
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        lfd f15,-136(r1)
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        lfd f16,-128(r1)
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        lfd f17,-120(r1)
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        lfd f18,-112(r1)
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        lfd f19,-104(r1)
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        lfd f20,-96(r1)
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        lfd f21,-88(r1)
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        lfd f22,-80(r1)
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        lfd f23,-72(r1)
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        lfd f24,-64(r1)
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        lfd f25,-56(r1)
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        lfd f26,-48(r1)
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        lfd f27,-40(r1)
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        lfd f28,-32(r1)
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        lfd f29,-24(r1)
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                        /*  restore callers LR  */
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        lg r0,SAVED_LR_OFFSET(r1)
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        lfd f30,-16(r1)
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                        /* and prepare for return to caller  */
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        mtlr r0
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        lfd f31,-8(r1)
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        blr

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