1/* Copyright (C) 2008-2020 Free Software Foundation, Inc.
2   Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
3		on behalf of Synopsys Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24<http://www.gnu.org/licenses/>.  */
25
26#include "arc-ieee-754.h"
27
28#if 0 /* DEBUG */
29	FUNC(__fixdfsi)
30	.global __fixdfsi
31	.balign 4
32__fixdfsi:
33	push_s blink
34	push_s r0
35	bl.d __fixdfsi_c
36	push_s r1
37	mov_s r2,r0
38	pop_s r1
39	ld r0,[sp]
40	bl.d __fixdfsi_asm
41	st r2,[sp]
42	pop_s r1
43	pop_s blink
44	cmp r0,r1
45	jeq_s [blink]
46	bl abort
47	ENDFUNC(__fixdfsi)
48#define __fixdfsi __fixdfsi_asm
49#endif /* DEBUG */
50
51/*      If the fraction has to be shifted left by a positive non-zero amount,
52        we have to combine bits from DBL0L and DBL0H.  If we shift right,
53        or shift by zero, we only want to have the bits from DBL0H in r0.  */
54
55	.global __fixdfsi
56	FUNC(__fixdfsi)
57	.balign 4
58__fixdfsi:
59	bbit0 DBL0H,30,.Lret0or1
60	asr r2,DBL0H,20
61	bmsk_s DBL0H,DBL0H,19
62	sub_s r2,r2,19; 0x3ff+20-0x400
63	neg_s r3,r2
64	asr.f 0,r3,11
65	bset_s DBL0H,DBL0H,20
66#ifdef __LITTLE_ENDIAN__
67	mov.cs DBL0L,DBL0H
68	asl DBL0H,DBL0H,r2
69#else
70	asl.cc DBL0H,DBL0H,r2
71	lsr.cs DBL0H,DBL0H,r3
72#endif
73	lsr_s DBL0L,DBL0L,r3
74
75	add.cc r0,r0,r1
76	j_s.d [blink]
77	neg.pl r0,r0
78.Lret0or1:
79	add.f r0,DBL0H,0x100000
80	lsr_s r0,r0,30
81
82	bmsk_s r0,r0,0
83	j_s.d [blink]
84	neg.mi r0,r0
85	ENDFUNC(__fixdfsi)
86