]>
Commit | Line | Data |
---|---|---|
cfc91acd | 1 | /* Copy a sign bit between floating-point values. PowerPC64 version. |
b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
cfc91acd RM |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
cfc91acd RM |
18 | |
19 | /* This has been coded in assembler because GCC makes such a mess of it | |
20 | when it's coded in C. */ | |
21 | ||
22 | #include <sysdep.h> | |
f964490f | 23 | #include <math_ldbl_opt.h> |
cfc91acd RM |
24 | |
25 | ENTRY(__copysign) | |
d7d06f79 | 26 | CALL_MCOUNT 0 |
cfc91acd RM |
27 | /* double [f1] copysign (double [f1] x, double [f2] y); |
28 | copysign(x,y) returns a value with the magnitude of x and | |
29 | with the sign bit of y. */ | |
c859b32e | 30 | stfd fp2,-8(r1) |
a7e91561 UD |
31 | nop |
32 | nop | |
33 | nop | |
c859b32e | 34 | ld r3,-8(r1) |
cfc91acd | 35 | cmpdi r3,0 |
cfc91acd RM |
36 | blt L(0) |
37 | fabs fp1,fp1 | |
38 | blr | |
39 | L(0): fnabs fp1,fp1 | |
40 | blr | |
41 | END (__copysign) | |
42 | ||
1ab18a5b | 43 | weak_alias (__copysign,copysign) |
cfc91acd RM |
44 | |
45 | /* It turns out that it's safe to use this code even for single-precision. */ | |
1ab18a5b | 46 | weak_alias (__copysign,copysignf) |
cfc91acd RM |
47 | strong_alias(__copysign,__copysignf) |
48 | ||
49 | #ifdef NO_LONG_DOUBLE | |
1ab18a5b | 50 | weak_alias (__copysign,copysignl) |
cfc91acd RM |
51 | strong_alias(__copysign,__copysignl) |
52 | #endif | |
a109996e | 53 | #if IS_IN (libm) |
f964490f RM |
54 | # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) |
55 | compat_symbol (libm, __copysign, copysignl, GLIBC_2_0) | |
56 | # endif | |
57 | #elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) | |
58 | compat_symbol (libc, __copysign, copysignl, GLIBC_2_0) | |
59 | #endif |