1/* Round float to int floating-point values, sparc64 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 <libm-alias-double.h>
21
22	/* We pop constants into the FPU registers using the incoming
23	   argument stack slots, since this avoid having to use any PIC
24	   references.  We also thus avoid having to allocate a register
25	   window.
26
27	   VIS instructions are used to facilitate the formation of
28	   easier constants, and the propagation of the sign bit.  */
29
30#define TWO_FIFTYTWO	0x43300000		/* 2**52 */
31
32#define ZERO		%f10			/* 0.0 */
33#define SIGN_BIT	%f12			/* -0.0 */
34
35ENTRY (__rint)
36	sethi	%hi(TWO_FIFTYTWO), %o2
37	sllx	%o2, 32, %o2
38	fzero	ZERO
39
40	fnegd	ZERO, SIGN_BIT
41	stx	%o2, [%sp + STACK_BIAS + 128]
42	fabsd	%f0, %f14
43
44	ldd	[%sp + STACK_BIAS + 128], %f16
45	fcmpd	%fcc3, %f14, %f16
46
47	fmovduge %fcc3, ZERO, %f16
48	fand	%f0, SIGN_BIT, SIGN_BIT
49
50	for	%f16, SIGN_BIT, %f16
51	faddd	%f0, %f16, %f6
52	fsubd	%f6, %f16, %f0
53	fabsd	%f0, %f0
54	retl
55	 for	%f0, SIGN_BIT, %f0
56END (__rint)
57libm_alias_double (__rint, rint)
58