diff options
Diffstat (limited to 'test/math/gamma.c')
| -rw-r--r-- | test/math/gamma.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/test/math/gamma.c b/test/math/gamma.c new file mode 100644 index 0000000..69c10af --- /dev/null +++ b/test/math/gamma.c @@ -0,0 +1,73 @@ +#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; +} |