3 double nan = 1.0/0.0 - 1.0/0.0;
13 #if ! defined (__vax__) && ! defined (_CRAY)
14 /* Move this line earlier, for architectures (like alpha) that issue
15 SIGFPE on the first comparisons. */
16 #ifndef SIGNAL_SUPPRESS
17 /* Some machines catches a SIGFPE when a NaN is compared.
18 Let this test succeed o such machines. */
19 signal (SIGFPE, leave);
21 /* NaN is an IEEE unordered operand. All these test should be false. */