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platform_ldbl128.c revision 1.6 
      1 /*	$NetBSD: platform_ldbl128.c,v 1.6 2023/07/05 11:42:14 rillig Exp $	*/
      2 # 3 "platform_ldbl128.c"
      3 
      4 /*
      5  * Test features that only apply to platforms that have 128-bit long double.
      6  */
      7 
      8 /* lint1-extra-flags: -c -h -a -p -b -r -z -X 351 */
      9 /* lint1-only-if: ldbl128 */
     10 
     11 /* CONSTCOND */
     12 typedef int bits_per_byte[((unsigned char)-1) == 255 ? 1 : -1];
     13 typedef int bytes_per_long_double[sizeof(long double) == 16 ? 1 : -1];
     14 
     15 /*
     16  * Platforms with 128-bit 'long double' typically use IEEE 754-2008, which has
     17  * 1 bit sign + 15 bit exponent + 112 bit normalized mantissa. This means the
     18  * maximum representable value is 1.1111111(bin) * 2^16383, which is about
     19  * 1.189e4932. This is in the same range as for 96-bit 'long double', as the
     20  * exponent range is the same.
     21  */
     22 /* expect+1: warning: floating-point constant out of range [248] */
     23 double larger_than_ldbl = 1e4933;
     24 /* expect+1: warning: floating-point constant out of range [248] */
     25 long double larger_than_ldbl_l = 1e4933L;
     26 /* expect+1: warning: floating-point constant out of range [248] */
     27 double larger_than_dbl = 1e4932;
     28 /* Fits in 'long double' but not in 'double'. */
     29 long double larger_than_dbl_l = 1e4932L;
     30