1 /* isinf(). PowerPC32/POWER7 version.
2 Copyright (C) 2010-2014 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>
24 .section .rodata.cst8,"aM",@progbits,8
27 .quad 0x3ff0000000000000
30 .type __isinf, @function
37 SETUP_GOT_ACCESS(r9,got_label)
38 addis r9,r9,.LC0-got_label@ha
39 lfd fp0,.LC0-got_label@l(r9)
49 bflr 29 /* If not INF, return. */
51 /* Either we have +INF or -INF. */
53 stwu r1,-16(r1) /* Allocate stack space. */
54 stfd fp1,8(r1) /* Transfer FP to GPR's. */
55 ori 2,2,0 /* Force a new dispatch group. */
56 lhz r4,8+HISHORT(r1) /* Fetch the upper 16 bits of the FP value
57 (biased exponent and sign bit). */
58 addi r1,r1,16 /* Reset the stack pointer. */
59 cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */
61 beqlr cr7 /* EQ means INF, otherwise -INF. */
67 weak_alias (__isinf, isinf)
69 /* It turns out that the 'double' version will also always work for
71 strong_alias (__isinf, __isinff)
73 weak_alias (__isinff, isinff)
76 strong_alias (__isinf, __isinfl)
77 weak_alias (__isinf, isinfl)
81 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
82 compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
83 compat_symbol (libc, isinf, isinfl, GLIBC_2_0);