gcc/testsuite/gcc.dg/dfp/signbit-2.c

   1 /* { dg-options "-O0" } */
   2
   3 /* Check that the compiler uses builtins for signbit; if not the link
   4    will fail because library functions are in libm.  */
   5
   6 #include "dfp-dbg.h"
   7
   8 volatile _Decimal32 sd = 2.3df;
   9 volatile _Decimal64 dd = -4.5dd;
  10 volatile _Decimal128 tf = 5.3dl;
  11 volatile float f = 1.2f;
  12 volatile double d = -7.8;
  13 volatile long double ld = 3.4L;
  14
  15 EXTERN int signbitf (float);
  16 EXTERN int signbit (double);
  17 EXTERN int signbitl (long double);
  18 EXTERN int signbitd32 (_Decimal32);
  19 EXTERN int signbitd64 (_Decimal64);
  20 EXTERN int signbitd128 (_Decimal128);
  21
  22 int
  23 main ()
  24 {
  25   if (signbitf (f) != 0) FAILURE
  26   if (signbit (d) == 0) FAILURE
  27   if (signbitl (ld) != 0) FAILURE
  28   if (signbitd32 (sd) != 0) FAILURE
  29   if (signbitd64 (dd) == 0) FAILURE
  30   if (signbitd128 (tf) != 0) FAILURE
  31
  32   FINISH
  33 }