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