#include <math.h> #include <float.h> #include <stdlib.h> #include <stdint.h> #include <stdio.h> #define check_d1(func, param, expected) \ do { \ int err; hex_union ur; hex_union up; \ double result = func(param); up.f = param; ur.f = result; \ errors += (err = (result != (expected))); \ err \ ? printf("FAIL: %s(%g/"HEXFMT")=%g/"HEXFMT" (expected %g)\n", \ #func, (double)(param), (long long)up.hex, result, (long long)ur.hex, (double)(expected)) \ : printf("PASS: %s(%g)=%g\n", #func, (double)(param), result); \ } while (0) #define HEXFMT "%08llx" typedef union { double f; uint64_t hex; } hex_union; double result; #define M_2_SQRT_PIl 3.5449077018110320545963349666822903L /* 2 sqrt (M_PIl) */ #define M_SQRT_PIl 1.7724538509055160272981674833411451L /* sqrt (M_PIl) */ double zero = 0.0; double minus_zero = 0.0; double nan_value = 0.0; int errors = 0; int main(void) { nan_value /= nan_value; minus_zero = copysign(zero, -1.0); //check_d1(tgamma, HUGE_VAL, NAN); //check_d1(tgamma, negative_integer, NAN); check_d1(tgamma, 0.0, HUGE_VAL); /* pole */ check_d1(tgamma, minus_zero, -HUGE_VAL); /* pole */ check_d1(tgamma, DBL_MAX/2, HUGE_VAL); /* overflow to inf */ check_d1(tgamma, DBL_MAX, HUGE_VAL); /* overflow to inf */ check_d1(tgamma, HUGE_VAL, HUGE_VAL); /* overflow to inf */ check_d1(tgamma, 7, 2*3*4*5*6); /* normal value */ check_d1(tgamma, -0.5, -M_2_SQRT_PIl); /* normal value (testing negative points) */ check_d1(lgamma, -HUGE_VAL, HUGE_VAL); //check_d1(lgamma, HUGE_VAL, NAN); check_d1(lgamma, 0.0, HUGE_VAL); /* pole */ check_d1(lgamma, minus_zero, HUGE_VAL); /* pole */ check_d1(lgamma, 1.0, 0.0); check_d1(lgamma, 2.0, 0.0); check_d1(lgamma, DBL_MAX/2, HUGE_VAL); /* overflow to inf */ check_d1(lgamma, DBL_MAX, HUGE_VAL); /* overflow to inf */ check_d1(lgamma, HUGE_VAL, HUGE_VAL); /* overflow to inf */ check_d1(lgamma, 7, log(2*3*4*5*6)); /* normal value */ /* In glibc, gamma == lgamma. (In BSD, it's == tgamma */ check_d1(gamma, -HUGE_VAL, HUGE_VAL); //check_d1(gamma, HUGE_VAL, NAN); check_d1(gamma, 0.0, HUGE_VAL); /* pole */ check_d1(gamma, minus_zero, HUGE_VAL); /* pole */ check_d1(gamma, 1.0, 0.0); check_d1(gamma, 2.0, 0.0); check_d1(gamma, DBL_MAX/2, HUGE_VAL); /* overflow to inf */ check_d1(gamma, DBL_MAX, HUGE_VAL); /* overflow to inf */ check_d1(gamma, HUGE_VAL, HUGE_VAL); /* overflow to inf */ check_d1(gamma, 7, log(2*3*4*5*6)); /* normal value */ printf("Errors: %d\n", errors); return errors; }