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/* Function to force register windows to the stack.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <bits/xtensa-config.h>
.text
.align 4
.literal_position
.global __window_spill
.type __window_spill, @function
__window_spill:
entry a1, 48
bbci.l a0, 31, .L4 // branch if called with call4
bbsi.l a0, 30, .L12 // branch if called with call12
/* Called with call8: touch register NUM_REGS-12 (4/20/52) */
.L8:
#if XCHAL_NUM_AREGS > 16
call12 1f
retw
.align 4
1: _entry a1, 48 // touch NUM_REGS-24 (x/8/40)
#if XCHAL_NUM_AREGS == 32
mov a8, a0
retw
#else
_entry a1, 48 // touch NUM_REGS-36 (x/x/28)
mov a12, a0
_entry a1, 48 // touch NUM_REGS-48 (x/x/16)
mov a12, a0
_entry a1, 16 // touch NUM_REGS-60 (x/x/4)
#endif
#endif
mov a4, a0
retw
/* Called with call4: touch register NUM_REGS-8 (8/24/56) */
.L4:
#if XCHAL_NUM_AREGS == 16
mov a8, a0
#else
call12 1f
retw
.align 4
1: _entry a1, 48 // touch NUM_REGS-20 (x/12/44)
mov a12, a0
#if XCHAL_NUM_AREGS > 32
_entry a1, 48 // touch NUM_REGS-32 (x/x/32)
mov a12, a0
_entry a1, 48 // touch NUM_REGS-44 (x/x/20)
mov a12, a0
_entry a1, 48 // touch NUM_REGS-56 (x/x/8)
mov a8, a0
#endif
#endif
retw
/* Called with call12: touch register NUM_REGS-16 (x/16/48) */
.L12:
#if XCHAL_NUM_AREGS > 16
call12 1f
retw
.align 4
1: _entry a1, 48 // touch NUM_REGS-28 (x/4/36)
#if XCHAL_NUM_AREGS == 32
mov a4, a0
#else
mov a12, a0
_entry a1, 48 // touch NUM_REGS-40 (x/x/24)
mov a12, a0
_entry a1, 48 // touch NUM_REGS-52 (x/x/12)
mov a12, a0
#endif
#endif
retw
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