| 1 |
282 |
jeremybenn |
/* This file contains the floating-point save and restore routines.
|
| 2 |
|
|
*
|
| 3 |
|
|
* Copyright (C) 2004, 2009 Free Software Foundation, Inc.
|
| 4 |
|
|
*
|
| 5 |
|
|
* This file is free software; you can redistribute it and/or modify it
|
| 6 |
|
|
* under the terms of the GNU General Public License as published by the
|
| 7 |
|
|
* Free Software Foundation; either version 3, or (at your option) any
|
| 8 |
|
|
* later version.
|
| 9 |
|
|
*
|
| 10 |
|
|
* This file is distributed in the hope that it will be useful, but
|
| 11 |
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 13 |
|
|
* General Public License for more details.
|
| 14 |
|
|
*
|
| 15 |
|
|
* Under Section 7 of GPL version 3, you are granted additional
|
| 16 |
|
|
* permissions described in the GCC Runtime Library Exception, version
|
| 17 |
|
|
* 3.1, as published by the Free Software Foundation.
|
| 18 |
|
|
*
|
| 19 |
|
|
* You should have received a copy of the GNU General Public License and
|
| 20 |
|
|
* a copy of the GCC Runtime Library Exception along with this program;
|
| 21 |
|
|
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
| 22 |
|
|
* .
|
| 23 |
|
|
*/
|
| 24 |
|
|
|
| 25 |
|
|
/* THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
|
| 26 |
|
|
ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
|
| 27 |
|
|
for example. For FP reg saves/restores, it takes one instruction
|
| 28 |
|
|
(4 bytes) to do the operation; for Vector regs, 2 instructions are
|
| 29 |
|
|
required (8 bytes.)
|
| 30 |
|
|
|
| 31 |
|
|
MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS! */
|
| 32 |
|
|
|
| 33 |
|
|
#include "darwin-asm.h"
|
| 34 |
|
|
|
| 35 |
|
|
.text
|
| 36 |
|
|
.align 2
|
| 37 |
|
|
|
| 38 |
|
|
/* saveFP saves R0 -- assumed to be the callers LR -- to 8/16(R1). */
|
| 39 |
|
|
|
| 40 |
|
|
.private_extern saveFP
|
| 41 |
|
|
saveFP:
|
| 42 |
|
|
stfd f14,-144(r1)
|
| 43 |
|
|
stfd f15,-136(r1)
|
| 44 |
|
|
stfd f16,-128(r1)
|
| 45 |
|
|
stfd f17,-120(r1)
|
| 46 |
|
|
stfd f18,-112(r1)
|
| 47 |
|
|
stfd f19,-104(r1)
|
| 48 |
|
|
stfd f20,-96(r1)
|
| 49 |
|
|
stfd f21,-88(r1)
|
| 50 |
|
|
stfd f22,-80(r1)
|
| 51 |
|
|
stfd f23,-72(r1)
|
| 52 |
|
|
stfd f24,-64(r1)
|
| 53 |
|
|
stfd f25,-56(r1)
|
| 54 |
|
|
stfd f26,-48(r1)
|
| 55 |
|
|
stfd f27,-40(r1)
|
| 56 |
|
|
stfd f28,-32(r1)
|
| 57 |
|
|
stfd f29,-24(r1)
|
| 58 |
|
|
stfd f30,-16(r1)
|
| 59 |
|
|
stfd f31,-8(r1)
|
| 60 |
|
|
stg r0,SAVED_LR_OFFSET(r1)
|
| 61 |
|
|
blr
|
| 62 |
|
|
|
| 63 |
|
|
/* restFP restores the caller`s LR from 8/16(R1). Note that the code for
|
| 64 |
|
|
this starts at the offset of F30 restoration, so calling this
|
| 65 |
|
|
routine in an attempt to restore only F31 WILL NOT WORK (it would
|
| 66 |
|
|
be a stupid thing to do, anyway.) */
|
| 67 |
|
|
|
| 68 |
|
|
.private_extern restFP
|
| 69 |
|
|
restFP:
|
| 70 |
|
|
lfd f14,-144(r1)
|
| 71 |
|
|
lfd f15,-136(r1)
|
| 72 |
|
|
lfd f16,-128(r1)
|
| 73 |
|
|
lfd f17,-120(r1)
|
| 74 |
|
|
lfd f18,-112(r1)
|
| 75 |
|
|
lfd f19,-104(r1)
|
| 76 |
|
|
lfd f20,-96(r1)
|
| 77 |
|
|
lfd f21,-88(r1)
|
| 78 |
|
|
lfd f22,-80(r1)
|
| 79 |
|
|
lfd f23,-72(r1)
|
| 80 |
|
|
lfd f24,-64(r1)
|
| 81 |
|
|
lfd f25,-56(r1)
|
| 82 |
|
|
lfd f26,-48(r1)
|
| 83 |
|
|
lfd f27,-40(r1)
|
| 84 |
|
|
lfd f28,-32(r1)
|
| 85 |
|
|
lfd f29,-24(r1)
|
| 86 |
|
|
/* restore callers LR */
|
| 87 |
|
|
lg r0,SAVED_LR_OFFSET(r1)
|
| 88 |
|
|
lfd f30,-16(r1)
|
| 89 |
|
|
/* and prepare for return to caller */
|
| 90 |
|
|
mtlr r0
|
| 91 |
|
|
lfd f31,-8(r1)
|
| 92 |
|
|
blr
|
