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- /* This file contains the floating-point save and restore routines.
- *
- * Copyright (C) 2004-2022 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 3, or (at your option) any
- * later version.
- *
- * 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.
- *
- * Under Section 7 of GPL version 3, you are granted additional
- * permissions described in the GCC Runtime Library Exception, version
- * 3.1, as published by the Free Software Foundation.
- *
- * You should have received a copy of the GNU General Public License and
- * a copy of the GCC Runtime Library Exception along with this program;
- * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- * <http://www.gnu.org/licenses/>.
- */
- /* 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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