git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 4393fc11 AZ |
1 | /* isinf(). PowerPC64/POWER8 version. |
| 2 | Copyright (C) 2014 Free Software Foundation, Inc. | |
| 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> | |
| 757d9dd5 | 20 | #include <endian.h> |
| 4393fc11 AZ |
21 | #include <math_ldbl_opt.h> |
| 22 | ||
| 757d9dd5 AZ |
23 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 24 | #define MFVSRD_R3_V1 .byte 0x66,0x00,0x23,0x7c /* mfvsrd r3,vs1 */ | |
| 25 | #else | |
| 4393fc11 | 26 | #define MFVSRD_R3_V1 .byte 0x7c,0x23,0x00,0x66 /* mfvsrd r3,vs1 */ |
| 757d9dd5 | 27 | #endif |
| 4393fc11 AZ |
28 | |
| 29 | /* int [r3] __isinf([fp1] x) */ | |
| 30 | ||
| 31 | EALIGN (__isinf, 4, 0) | |
| 32 | CALL_MCOUNT 0 | |
| 33 | MFVSRD_R3_V1 | |
| 34 | lis r9,0x7ff0 /* r9 = 0x7ff0 */ | |
| 35 | rldicl r10,r3,0,1 /* r10 = r3 & (0x8000000000000000) */ | |
| 36 | sldi r9,r9,32 /* r9 = r9 << 52 */ | |
| 37 | cmpd cr7,r10,r9 /* fp1 & 0x7ff0000000000000 ? */ | |
| 38 | beq cr7,L(inf) | |
| 39 | li r3,0 /* Not inf */ | |
| 40 | blr | |
| 41 | L(inf): | |
| 42 | sradi r3,r3,63 /* r3 = r3 >> 63 */ | |
| 43 | ori r3,r3,1 /* r3 = r3 | 0x1 */ | |
| 44 | blr | |
| 45 | END (__isinf) | |
| 46 | ||
| 47 | hidden_def (__isinf) | |
| 48 | weak_alias (__isinf, isinf) | |
| 49 | ||
| 50 | /* It turns out that the 'double' version will also always work for | |
| 51 | single-precision. */ | |
| 52 | strong_alias (__isinf, __isinff) | |
| 53 | hidden_def (__isinff) | |
| 54 | weak_alias (__isinff, isinff) | |
| 55 | ||
| 56 | #ifdef NO_LONG_DOUBLE | |
| 57 | strong_alias (__isinf, __isinfl) | |
| 58 | weak_alias (__isinf, isinfl) | |
| 59 | #endif | |
| 60 | ||
| 61 | #ifndef IS_IN_libm | |
| 62 | # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) | |
| 63 | compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0); | |
| 64 | compat_symbol (libc, isinf, isinfl, GLIBC_2_0); | |
| 65 | # endif | |
| 66 | #endif |