1 /* isinf(). PowerPC64/POWER7 version.
2 Copyright (C) 2010 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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <math_ldbl_opt.h>
27 .tc FD_ONE[TC],0x3ff0000000000000
29 .type __isinf, @function
31 EALIGN (__isinf, 4, 0)
36 bflr 29 /* If not INF, return. */
38 /* Either we have -INF/+INF or a denormal. */
40 stfd fp1,-16(r1) /* Transfer FP to GPR's. */
41 ori 2,2,0 /* Force a new dispatch group. */
42 lhz r4,-16(r1) /* Fetch the upper portion of the high word of
43 the FP value (where the exponent and sign bits
45 cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */
47 beqlr cr7 /* EQ means INF, otherwise -INF. */
53 weak_alias (__isinf, isinf)
55 /* It turns out that the 'double' version will also always work for
57 strong_alias (__isinf, __isinff)
59 weak_alias (__isinff, isinff)
62 strong_alias (__isinf, __isinfl)
63 weak_alias (__isinf, isinfl)
67 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
68 compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
69 compat_symbol (libc, isinf, isinfl, GLIBC_2_0);