1 /* Round to int floating-point values. PowerPC64 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. */
24 #include <math_ldbl_opt.h>
27 /* double [fp1] nearbyint(double [fp1] x) */
31 .tc FD_43300000_0[TC],0x4330000000000000
34 EALIGN (__nearbyint, 4, 0)
38 fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
40 fsub fp12,fp13,fp13 /* generate 0.0 */
41 fcmpu cr7,fp1,fp12 /* if (x > 0.0) */
42 ble cr7, L(lessthanzero)
43 mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */
44 fadd fp1,fp1,fp13 /* x+= TWO52 */
45 fsub fp1,fp1,fp13 /* x-= TWO52 */
46 fabs fp1,fp1 /* if (x == 0.0) */
47 mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */
50 bgelr cr7 /* if (x < 0.0) */
52 fsub fp1,fp1,fp13 /* x -= TWO52 */
53 fadd fp1,fp1,fp13 /* x += TWO52 */
54 fnabs fp1,fp1 /* if (x == 0.0) */
59 weak_alias (__nearbyint, nearbyint)
62 weak_alias (__nearbyint, nearbyint)
63 strong_alias (__nearbyint, __nearbyintl)
65 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
66 compat_symbol (libm, __nearbyint, nearbyintl, GLIBC_2_1)