1/* Copyright (C) 2008-2021 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/* inputs: DBL0, DBL1
28   output: c,z flags to be used for 'hi' condition
29   clobber: r12, flags  */
30/* For NaNs, bit 19.. bit 30 of the high word must be set.  */
31#if 0 /* DEBUG */
32	.global __gtdf2
33	.balign 4
34	FUNC(__gtdf2)
35__gtdf2:
36	st.a r11,[sp,-4]` push_s blink` st.a r10,[sp,-4]` st.a r9,[sp,-4]
37	st.a r8,[sp,-4]` st.a r7,[sp,-4]` st.a r6,[sp,-4]` st.a r5,[sp,-4]
38	st.a r4,[sp,-4]` push_s r3` push_s r2` push_s r1`
39	bl.d __gtdf2_c` push_s r0
40	mov r11,r0` pop_s r0` pop_s r1` pop_s r2` pop_s r3
41	ld.ab r4,[sp,4]` ld.ab r5,[sp,4]` ld.ab r6,[sp,4]`
42	ld.ab r7,[sp,4]` ld.ab r8,[sp,4]` ld.ab r9,[sp,4]
43	bl.d __gtdf2_asm` ld.ab r10,[sp,4]
44	pop_s blink
45	brgt.d r11,0,0f
46	ld.ab r11,[sp,4]
47	jls [blink]
48	bl abort
490:	jhi [blink]
50	bl abort
51	ENDFUNC(__gtdf2)
52#define __gtdf2 __gtdf2_asm
53#endif /* DEBUG */
54	.global __gtdf2
55	.balign	4
56	HIDDEN_FUNC(__gtdf2)
57__gtdf2:
58	or.f	r12,DBL0H,DBL1H
59	bmi.d	.Lneg
60	bmsk_s	r12,r12,20
61	add1.f	0,r12,DBL0H	; clear z; set c iff NaN
62	add1.cc.f r12,r12,DBL1H	; clear z; set c iff NaN
63	; don't care: z may or may not be cleared if there is no NaN event
64	cmp.cc	DBL0H,DBL1H
65	j_s.d	[blink]
66	cmp.eq	DBL0L,DBL1L
67	.balign 4
68.Lneg:	breq.d	DBL0H,0,.L0
69	add1.f	0,r12,DBL1H
70	add1.cc.f r12,r12,DBL0H
71	cmp.cc	DBL1H,DBL0H
72	j_s.d	[blink]
73	cmp.eq	DBL1L,DBL0L
74	.balign 4
75.L0:
76	bxor.f	0,DBL1H,31
77	beq_s	.Lcheck_0
78	cmp.cc	DBL1H,DBL0H
79	j_s.d	[blink]
80	cmp.eq	DBL1L,DBL0L
81	.balign	4
82.Lcheck_0:
83	; high words suggest DBL0 may be +0, DBL1 -0; check low words.
84	j_s.d	[blink]
85	or.f	0,DBL0L,DBL1L
86	ENDFUNC(__gtdf2)
87