| /* |
| * Written by J.T. Conklin <jtc@netbsd.org>. |
| * Change for long double by Ulrich Drepper <drepper@cygnus.com>. |
| * Intel i387 specific version. |
| * Public domain. |
| */ |
| |
| #if defined(LIBM_SCCS) && !defined(lint) |
| static char rcsid[] = "$NetBSD: $"; |
| #endif |
| |
| /* |
| * isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0; |
| * no branching! |
| */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| |
| int __isinfl(long double x) |
| { |
| int32_t se,hx,lx; |
| GET_LDOUBLE_WORDS(se,hx,lx,x); |
| /* This additional ^ 0x80000000 is necessary because in Intel's |
| internal representation of the implicit one is explicit. */ |
| lx |= (hx ^ 0x80000000) | ((se & 0x7fff) ^ 0x7fff); |
| lx |= -lx; |
| se &= 0x8000; |
| return ~(lx >> 31) & (1 - (se >> 14)); |
| } |
| hidden_def (__isinfl) |
| weak_alias (__isinfl, isinfl) |
