1/* Round float to int floating-point values, sparc32 v9 version.
2   Copyright (C) 2012-2022 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
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.
9
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.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20#include <math_ldbl_opt.h>
21#include <libm-alias-double.h>
22
23	/* We pop constants into the FPU registers using the incoming
24	   argument stack slots, since this avoid having to use any PIC
25	   references.  We also thus avoid having to allocate a register
26	   window.
27
28	   VIS instructions are used to facilitate the formation of
29	   easier constants, and the propagation of the sign bit.  */
30
31#define TWO_FIFTYTWO	0x43300000		/* 2**52 */
32
33#define ZERO		%f10			/* 0.0 */
34#define SIGN_BIT	%f12			/* -0.0 */
35
36ENTRY (__rint)
37	sethi	%hi(TWO_FIFTYTWO), %o2
38	sllx	%o0, 32, %o0
39
40	or	%o0, %o1, %o0
41	fzero	ZERO
42
43	stx	%o0, [%sp + 72]
44	sllx	%o2, 32, %o2
45	fnegd	ZERO, SIGN_BIT
46
47	ldd	[%sp + 72], %f0
48
49	stx	%o2, [%sp + 72]
50	fabsd	%f0, %f14
51
52	ldd	[%sp + 72], %f16
53	fcmpd	%fcc3, %f14, %f16
54
55	fmovduge %fcc3, ZERO, %f16
56	fand	%f0, SIGN_BIT, SIGN_BIT
57
58	for	%f16, SIGN_BIT, %f16
59	faddd	%f0, %f16, %f6
60	fsubd	%f6, %f16, %f0
61	fabsd	%f0, %f0
62	retl
63	 for	%f0, SIGN_BIT, %f0
64END (__rint)
65libm_alias_double (__rint, rint)
66