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4393fc11 | 1 | /* isinf(). PowerPC64/POWER8 version. |
688903eb | 2 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
4393fc11 AZ |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <sysdep.h> | |
20 | #include <math_ldbl_opt.h> | |
21 | ||
7110166d | 22 | #define MFVSRD_R3_V1 .long 0x7c230066 /* mfvsrd r3,vs1 */ |
4393fc11 AZ |
23 | |
24 | /* int [r3] __isinf([fp1] x) */ | |
25 | ||
d5b41185 | 26 | ENTRY_TOCLESS (__isinf, 4) |
4393fc11 AZ |
27 | CALL_MCOUNT 0 |
28 | MFVSRD_R3_V1 | |
29 | lis r9,0x7ff0 /* r9 = 0x7ff0 */ | |
30 | rldicl r10,r3,0,1 /* r10 = r3 & (0x8000000000000000) */ | |
31 | sldi r9,r9,32 /* r9 = r9 << 52 */ | |
32 | cmpd cr7,r10,r9 /* fp1 & 0x7ff0000000000000 ? */ | |
33 | beq cr7,L(inf) | |
34 | li r3,0 /* Not inf */ | |
35 | blr | |
36 | L(inf): | |
37 | sradi r3,r3,63 /* r3 = r3 >> 63 */ | |
38 | ori r3,r3,1 /* r3 = r3 | 0x1 */ | |
39 | blr | |
40 | END (__isinf) | |
41 | ||
42 | hidden_def (__isinf) | |
43 | weak_alias (__isinf, isinf) | |
44 | ||
45 | /* It turns out that the 'double' version will also always work for | |
46 | single-precision. */ | |
47 | strong_alias (__isinf, __isinff) | |
48 | hidden_def (__isinff) | |
49 | weak_alias (__isinff, isinff) | |
50 | ||
51 | #ifdef NO_LONG_DOUBLE | |
52 | strong_alias (__isinf, __isinfl) | |
53 | weak_alias (__isinf, isinfl) | |
54 | #endif | |
55 | ||
a109996e | 56 | #if !IS_IN (libm) |
4393fc11 AZ |
57 | # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
58 | compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0); | |
59 | compat_symbol (libc, isinf, isinfl, GLIBC_2_0); | |
60 | # endif | |
61 | #endif |