1 /* isinf(). PowerPC64/POWER7 version.
2 Copyright (C) 2010-2015 Free Software Foundation, Inc.
3 Contributed by Luis Machado <luisgpm@br.ibm.com>.
4 This file is part of the GNU C Library.
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/>. */
21 #include <math_ldbl_opt.h>
26 .tc FD_ONE[TC],0x3ff0000000000000
28 .type __isinf, @function
30 EALIGN (__isinf, 4, 0)
35 bflr 29 /* If not INF, return. */
37 /* Either we have -INF/+INF or a denormal. */
39 stfd fp1,-16(r1) /* Transfer FP to GPR's. */
40 ori 2,2,0 /* Force a new dispatch group. */
41 lhz r4,-16+HISHORT(r1) /* Fetch the upper 16 bits of the FP value
42 (biased exponent and sign bit). */
43 cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */
45 beqlr cr7 /* EQ means INF, otherwise -INF. */
51 weak_alias (__isinf, isinf)
53 /* It turns out that the 'double' version will also always work for
55 strong_alias (__isinf, __isinff)
57 weak_alias (__isinff, isinff)
60 strong_alias (__isinf, __isinfl)
61 weak_alias (__isinf, isinfl)
65 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
66 compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
67 compat_symbol (libc, isinf, isinfl, GLIBC_2_0);