1 /* Function to force register windows to the stack.
2 Copyright (C) 2005, 2007 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
18 Boston, MA 02110-1301, USA. */
20 #include <bits/xtensa-config.h>
25 .global __window_spill
26 .type __window_spill, @function
29 bbci.l a0, 31, .L4 // branch if called with call4
30 bbsi.l a0, 30, .L12 // branch if called with call12
32 /* Called with call8: touch register NUM_REGS-12 (4/20/52) */
34 #if XCHAL_NUM_AREGS > 16
39 1: _entry a1, 48 // touch NUM_REGS-24 (x/8/40)
41 #if XCHAL_NUM_AREGS == 32
45 _entry a1, 48 // touch NUM_REGS-36 (x/x/28)
47 _entry a1, 48 // touch NUM_REGS-48 (x/x/16)
49 _entry a1, 16 // touch NUM_REGS-60 (x/x/4)
55 /* Called with call4: touch register NUM_REGS-8 (8/24/56) */
57 #if XCHAL_NUM_AREGS == 16
64 1: _entry a1, 48 // touch NUM_REGS-20 (x/12/44)
66 #if XCHAL_NUM_AREGS > 32
67 _entry a1, 48 // touch NUM_REGS-32 (x/x/32)
69 _entry a1, 48 // touch NUM_REGS-44 (x/x/20)
71 _entry a1, 48 // touch NUM_REGS-56 (x/x/8)
77 /* Called with call12: touch register NUM_REGS-16 (x/16/48) */
79 #if XCHAL_NUM_AREGS > 16
84 1: _entry a1, 48 // touch NUM_REGS-28 (x/4/36)
85 #if XCHAL_NUM_AREGS == 32
89 _entry a1, 48 // touch NUM_REGS-40 (x/x/24)
91 _entry a1, 48 // touch NUM_REGS-52 (x/x/12)