stress-fp-subnormal: use DBL consts when long double size is same as double

32 bit systems such as armel and armhf may have long doubles the same
size as doubles, so check for the matching size and use DBL constants
in these cases.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

Author: ColinIanKing

stress-fp-subnormal.c

@@ -427,11 +427,19 @@ static int stress_fp(stress_args_t *args)
 		stress_fp_subnormal_metrics[i].count = 0.0;
 	}
 
+#if DBL_MIN_EXP == LDBL_MIN_EXP
+	fp_data->ld.tiny1 = DBL_TINY1;
+	fp_data->ld.tiny2 = DBL_TINY2;
+	fp_data->ld.oneish = DBL_ONEISH;
+	fp_data->ld.r[0] = DBL_TINY1;
+	fp_data->ld.r[1] = DBL_TINY1;
+#else
 	fp_data->ld.tiny1 = LDBL_TINY1;
 	fp_data->ld.tiny2 = LDBL_TINY2;
 	fp_data->ld.oneish = LDBL_ONEISH;
 	fp_data->ld.r[0] = LDBL_TINY1;
 	fp_data->ld.r[1] = LDBL_TINY1;
+#endif
 
 	fp_data->d.tiny1 = DBL_TINY1;
 	fp_data->d.tiny2 = DBL_TINY2;