| # Copyright (C) 2007-2018 Free Software Foundation, Inc. |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| frexpl_test = ''' |
| #include <float.h> |
| #include <math.h> |
| /* Override the values of <float.h>, like done in float.in.h. */ |
| #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__) |
| # undef LDBL_MIN_EXP |
| # define LDBL_MIN_EXP (-16381) |
| #endif |
| #if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__) |
| # undef LDBL_MIN_EXP |
| # define LDBL_MIN_EXP (-16381) |
| #endif |
| #if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__ |
| # undef LDBL_MIN_EXP |
| # define LDBL_MIN_EXP DBL_MIN_EXP |
| #endif |
| #if defined __sgi && (LDBL_MANT_DIG >= 106) |
| # if defined __GNUC__ |
| # undef LDBL_MIN_EXP |
| # define LDBL_MIN_EXP DBL_MIN_EXP |
| # endif |
| #endif |
| extern |
| #ifdef __cplusplus |
| "C" |
| #endif |
| |
| #if !defined (_MSC_VER) || defined (TEST_FREXPL_DECL) |
| long double frexpl (long double, int *); |
| #endif |
| |
| int main() |
| { |
| int result = 0; |
| volatile long double x; |
| /* Test on finite numbers that fails on AIX 5.1. */ |
| x = 16.0L; |
| { |
| int exp = -9999; |
| frexpl (x, &exp); |
| if (exp != 5) |
| result |= 1; |
| } |
| /* Test on finite numbers that fails on Mac OS X 10.4, because its frexpl |
| function returns an invalid (incorrectly normalized) value: it returns |
| y = { 0x3fe028f5, 0xc28f5c28, 0x3c9eb851, 0xeb851eb8 } |
| but the correct result is |
| 0.505L = { 0x3fe028f5, 0xc28f5c29, 0xbc547ae1, 0x47ae1480 } */ |
| x = 1.01L; |
| { |
| int exp = -9999; |
| long double y = frexpl (x, &exp); |
| if (!(exp == 1 && y == 0.505L)) |
| result |= 2; |
| } |
| /* Test on large finite numbers. This fails on BeOS at i = 16322, while |
| LDBL_MAX_EXP = 16384. |
| In the loop end test, we test x against Infinity, rather than comparing |
| i with LDBL_MAX_EXP, because BeOS <float.h> has a wrong LDBL_MAX_EXP. */ |
| { |
| int i; |
| for (i = 1, x = 1.0L; x != x + x; i++, x *= 2.0L) |
| { |
| int exp = -9999; |
| frexpl (x, &exp); |
| if (exp != i) |
| { |
| result |= 4; |
| break; |
| } |
| } |
| } |
| /* Test on denormalized numbers. */ |
| { |
| int i; |
| for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L) |
| ; |
| if (x > 0.0L) |
| { |
| int exp; |
| long double y = frexpl (x, &exp); |
| /* On machines with IEEE854 arithmetic: x = 1.68105e-4932, |
| exp = -16382, y = 0.5. On Mac OS X 10.5: exp = -16384, y = 0.5. */ |
| if (exp != LDBL_MIN_EXP - 1) |
| result |= 8; |
| } |
| } |
| /* Test on infinite numbers. */ |
| /* The dance around 0.0L is an attempt to prevent MSVC from erroring out */ |
| x = 0.0L; |
| x = 1.0L / x; |
| { |
| int exp; |
| long double y = frexpl (x, &exp); |
| if (y != x) |
| result |= 16; |
| } |
| return result; |
| } |
| ''' |
| |
| if not meson.is_cross_build() or meson.has_exe_wrapper() |
| run_result = cc.run(frexpl_test, |
| name : 'frexpl works', |
| dependencies : [libm]) |
| rc = run_result.returncode() |
| gl_cv_func_frexpl_works = run_result.compiled() and rc == 0 |
| gl_cv_func_frexpl_broken_beyond_repair = not gl_cv_func_frexpl_works |
| # bit 1 is not set |
| if (rc == 16) |
| gl_cv_func_frexpl_broken_beyond_repair = false |
| else |
| gl_cv_func_frexpl_broken_beyond_repair = true |
| endif |
| else |
| if (host_system.startswith ('aix') or |
| host_system.startswith ('beos') or |
| host_system.startswith ('irix')) |
| gl_cv_func_frexpl_works = false |
| gl_cv_func_frexpl_broken_beyond_repair = true |
| elif (host_system == 'windows') |
| gl_cv_func_frexpl_works = false |
| gl_cv_func_frexpl_broken_beyond_repair = false |
| else |
| gl_cv_func_frexpl_works = true |
| gl_cv_func_frexpl_broken_beyond_repair = false |
| endif |
| endif |
| |
| frexpl_test_decl = ''' |
| #define TEST_FREXPL_DECL 1 |
| ''' + frexpl_test |
| |
| build_result = cc.compiles(frexpl_test_decl, |
| name : 'frexpl prototype can be re-listed') |
| gl_cv_func_frexpl_decl = build_result |