| /* isinf(). PowerPC32/POWER7 version. |
| Copyright (C) 2010-2018 Free Software Foundation, Inc. |
| Contributed by Luis Machado <luisgpm@br.ibm.com>. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <math_ldbl_opt.h> |
| |
| /* int __isinf(x) */ |
| .section .rodata.cst8,"aM",@progbits,8 |
| .align 3 |
| .LC0: /* 1.0 */ |
| .quad 0x3ff0000000000000 |
| |
| .section ".text" |
| .type __isinf, @function |
| .machine power7 |
| ENTRY (__isinf) |
| #ifdef SHARED |
| mflr r11 |
| cfi_register(lr,r11) |
| |
| SETUP_GOT_ACCESS(r9,got_label) |
| addis r9,r9,.LC0-got_label@ha |
| lfd fp0,.LC0-got_label@l(r9) |
| |
| mtlr r11 |
| cfi_same_value (lr) |
| #else |
| lis r9,.LC0@ha |
| lfd fp0,.LC0@l(r9) |
| #endif |
| ftdiv cr7,fp1,fp0 |
| li r3,0 |
| bflr 29 /* If not INF, return. */ |
| |
| /* Either we have +INF or -INF. */ |
| |
| stwu r1,-16(r1) /* Allocate stack space. */ |
| stfd fp1,8(r1) /* Transfer FP to GPR's. */ |
| ori 2,2,0 /* Force a new dispatch group. */ |
| lhz r4,8+HISHORT(r1) /* Fetch the upper 16 bits of the FP value |
| (biased exponent and sign bit). */ |
| addi r1,r1,16 /* Reset the stack pointer. */ |
| cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */ |
| li r3,1 |
| beqlr cr7 /* EQ means INF, otherwise -INF. */ |
| li r3,-1 |
| blr |
| END (__isinf) |
| |
| hidden_def (__isinf) |
| weak_alias (__isinf, isinf) |
| |
| /* It turns out that the 'double' version will also always work for |
| single-precision. */ |
| strong_alias (__isinf, __isinff) |
| hidden_def (__isinff) |
| weak_alias (__isinff, isinff) |
| |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__isinf, __isinfl) |
| weak_alias (__isinf, isinfl) |
| #endif |
| |
| #if !IS_IN (libm) |
| # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
| compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0); |
| compat_symbol (libc, isinf, isinfl, GLIBC_2_0); |
| # endif |
| #endif |
