1 /* Round to int floating-point values. PowerPC32 version.
2 Copyright (C) 2011-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 /* This has been coded in assembler because GCC makes such a mess of it
21 when it's coded in C. */
26 /* float [fp1] nearbyintf(float [fp1] x) */
28 .section .rodata.cst4,"aM",@progbits,4
31 .long 0x4B000000 /* TWO23: 2**23 */
40 addis r9,r9,.LC0-1b@ha
41 lfs fp13,.LC0-1b@l(r9)
49 fsub fp12,fp13,fp13 /* generate 0.0 */
50 fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO23 */
52 fcmpu cr7,fp1,fp12 /* if (x > 0.0 */
53 ble cr7,L(lessthanzero)
54 mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */
55 fadds fp1,fp1,fp13 /* x += TWO23 */
56 fsubs fp1,fp1,fp13 /* x -= TWO23 */
57 fabs fp1,fp1 /* if (x == 0.0) */
58 mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */
62 mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */
63 fsubs fp1,fp1,fp13 /* x -= TWO23 */
64 fadds fp1,fp1,fp13 /* x += TWO23 */
65 fnabs fp1,fp1 /* if (x == 0.0) */
66 mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */
70 weak_alias (__nearbyintf, nearbyintf)