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