| /* Round to int floating-point values. PowerPC32 version. |
| Copyright (C) 2011-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011 |
| |
| 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/>. */ |
| |
| /* This has been coded in assembler because GCC makes such a mess of it |
| when it's coded in C. */ |
| |
| #include <sysdep.h> |
| #include <math_ldbl_opt.h> |
| |
| |
| /* double [fp1] nearbyint(double [fp1] x) */ |
| |
| .section .rodata.cst4,"aM",@progbits,4 |
| .align 2 |
| .LC0: /* 2**52 */ |
| .long 0x59800000 /* TWO52: 2**52 */ |
| |
| .section ".text" |
| ENTRY (__nearbyint) |
| #ifdef SHARED |
| mflr r11 |
| cfi_register(lr,r11) |
| bcl 20,31,1f |
| 1: mflr r9 |
| addis r9,r9,.LC0-1b@ha |
| lfs fp13,.LC0-1b@l(r9) |
| mtlr r11 |
| cfi_same_value (lr) |
| #else |
| lis r9,.LC0@ha |
| lfs fp13,.LC0@l(r9) |
| #endif |
| fabs fp0,fp1 |
| fsub fp12,fp13,fp13 /* generate 0.0 */ |
| fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52 */ |
| bgelr cr7 |
| fcmpu cr7,fp1,fp12 /* if (x > 0.0 */ |
| ble cr7,L(lessthanzero) |
| mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */ |
| fadd fp1,fp1,fp13 /* x += TWO52 */ |
| fsub fp1,fp1,fp13 /* x -= TWO52 */ |
| fabs fp1,fp1 /* if (x == 0.0 */ |
| mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */ |
| blr |
| L(lessthanzero): |
| bgelr cr7 |
| mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */ |
| fsub fp1,fp1,fp13 /* x -= TWO52 */ |
| fadd fp1,fp1,fp13 /* x += TWO52 */ |
| fnabs fp1,fp1 /* if (x == 0.0) */ |
| mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */ |
| blr |
| END (__nearbyint) |
| |
| weak_alias (__nearbyint, nearbyint) |
| |
| #ifdef NO_LONG_DOUBLE |
| weak_alias (__nearbyint, nearbyintl) |
| strong_alias (__nearbyint, __nearbyintl) |
| #endif |
| #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) |
| compat_symbol (libm, __nearbyint, nearbyintl, GLIBC_2_1) |
| #endif |
