1 | /* |
2 | * Written by J.T. Conklin <jtc@netbsd.org>. |
3 | * Change for long double by Jakub Jelinek <jj@ultra.linux.cz> |
4 | * Public domain. |
5 | */ |
6 | |
7 | #if defined(LIBM_SCCS) && !defined(lint) |
8 | static char rcsid[] = "$NetBSD: $" ; |
9 | #endif |
10 | |
11 | /* |
12 | * isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0; |
13 | * no branching! |
14 | */ |
15 | |
16 | #include <math.h> |
17 | #include <math_private.h> |
18 | |
19 | int |
20 | __isinfl (_Float128 x) |
21 | { |
22 | int64_t hx,lx; |
23 | GET_LDOUBLE_WORDS64(hx,lx,x); |
24 | lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL; |
25 | lx |= -lx; |
26 | return ~(lx >> 63) & (hx >> 62); |
27 | } |
28 | mathx_hidden_def (__isinfl) |
29 | weak_alias (__isinfl, isinfl) |
30 | |