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0f507b6c | 1 | /* isinf(). PowerPC64/POWER7 version. |
d4697bc9 | 2 | Copyright (C) 2010-2014 Free Software Foundation, Inc. |
0f507b6c LM |
3 | Contributed by Luis Machado <luisgpm@br.ibm.com>. |
4 | This file is part of the GNU C Library. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
0f507b6c LM |
19 | |
20 | #include <sysdep.h> | |
21 | #include <math_ldbl_opt.h> | |
22 | ||
23 | /* int __isinf(x) */ | |
24 | .section ".toc","aw" | |
25 | .LC0: /* 1.0 */ | |
26 | .tc FD_ONE[TC],0x3ff0000000000000 | |
27 | .section ".text" | |
28 | .type __isinf, @function | |
29 | .machine power7 | |
30 | EALIGN (__isinf, 4, 0) | |
31 | CALL_MCOUNT 0 | |
32 | lfd fp0,.LC0@toc(r2) | |
33 | ftdiv cr7,fp1,fp0 | |
34 | li r3,0 | |
35 | bflr 29 /* If not INF, return. */ | |
36 | ||
37 | /* Either we have -INF/+INF or a denormal. */ | |
38 | ||
39 | stfd fp1,-16(r1) /* Transfer FP to GPR's. */ | |
40 | ori 2,2,0 /* Force a new dispatch group. */ | |
7b88401f AM |
41 | lhz r4,-16+HISHORT(r1) /* Fetch the upper 16 bits of the FP value |
42 | (biased exponent and sign bit). */ | |
0f507b6c LM |
43 | cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */ |
44 | li r3,1 | |
45 | beqlr cr7 /* EQ means INF, otherwise -INF. */ | |
46 | li r3,-1 | |
47 | blr | |
48 | END (__isinf) | |
49 | ||
50 | hidden_def (__isinf) | |
51 | weak_alias (__isinf, isinf) | |
52 | ||
53 | /* It turns out that the 'double' version will also always work for | |
54 | single-precision. */ | |
55 | strong_alias (__isinf, __isinff) | |
56 | hidden_def (__isinff) | |
57 | weak_alias (__isinff, isinff) | |
58 | ||
59 | #ifdef NO_LONG_DOUBLE | |
60 | strong_alias (__isinf, __isinfl) | |
61 | weak_alias (__isinf, isinfl) | |
62 | #endif | |
63 | ||
64 | #ifndef IS_IN_libm | |
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); | |
68 | # endif | |
69 | #endif |