log.c File Reference

#include "math_helpers.h"

Include dependency graph for log.c:

Go to the source code of this file.

Macros
#define	_CRTBLD
#define	HAS_LOGF

Functions
void	Test_log_exact (void)
void	Test_log_approx (void)
void	Test_logf_exact (void)
void	Test_logf_approx (void)
	START_TEST (log)

Variables
static TESTENTRY_DBL	s_log_exact_tests []
static TESTENTRY_DBL_APPROX	s_log_approx_tests []
static TESTENTRY_DBL	s_logf_exact_tests []
static TESTENTRY_DBL_APPROX	s_logf_approx_tests []

Macro Definition Documentation

_CRTBLD

#define _CRTBLD

Definition at line 9 of file log.c.

HAS_LOGF

#define HAS_LOGF

Definition at line 18 of file log.c.

Function Documentation

START_TEST()

START_TEST

(

log

)

Definition at line 257 of file log.c.

{
    Test_log_exact();
    Test_log_approx();
#if defined(HAS_LOGF)
    Test_logf_exact();
    Test_logf_approx();
#endif
#if defined(HAS_LIBM_SSE2)
    Test_libm_sse2_log();
    Test_libm_sse2_logf();
#endif
}

Test_log_approx()

void Test_log_approx

(

void

)

Definition at line 99 of file log.c.

{
    for (int i = 0; i < _countof(s_log_approx_tests); i++)
    {
        double x = s_log_approx_tests[i].x;
        double expected = s_log_approx_tests[i].expected.rounded;
        double z = log(x);
        int64_t error = abs(ulp_error_precise(&s_log_approx_tests[i].expected, z));
        ok(error <= s_log_approx_tests[i].max_error,
            "log(%.17e) = %.17e, expected %.17e, error %I64d ULPs, max %u ULPs\n",
            x, z, expected, error, s_log_approx_tests[i].max_error);
    }
}

Referenced by START_TEST().

Test_log_exact()

void Test_log_exact

(

void

)

Definition at line 43 of file log.c.

{
    for (int i = 0; i < _countof(s_log_exact_tests); i++)
    {
        double x = u64_to_dbl(s_log_exact_tests[i].x);
        double z = log(x);
        ok_eq_dbl_exact("log", s_log_exact_tests[i].x, z, s_log_exact_tests[i].result);
    }
}

Referenced by START_TEST().

Test_logf_approx()

void Test_logf_approx

(

void

)

Definition at line 197 of file log.c.

{
    for (int i = 0; i < _countof(s_logf_approx_tests); i++)
    {
        float x = s_logf_approx_tests[i].x;
        float expected = s_logf_approx_tests[i].expected.rounded;
        float z = logf(x);
        int64_t error = abs(ulp_error_flt(expected, z));
        ok(error <= s_log_approx_tests[i].max_error,
            "log(%.6e) = %.7e, expected %.7e, error %I64d ULPs, max %u ULPs\n",
            x, z, expected, error, s_log_approx_tests[i].max_error);
    }
}

Referenced by START_TEST().

Test_logf_exact()

void Test_logf_exact

(

void

)

Definition at line 134 of file log.c.

{
    for (int i = 0; i < _countof(s_logf_exact_tests); i++)
    {
        float x = u64_to_dbl(s_logf_exact_tests[i].x);
        float z = logf(x);
        ok_eq_flt_exact("logf", s_logf_exact_tests[i].x, z, s_logf_exact_tests[i].result);
    }
}

Referenced by START_TEST().

Variable Documentation

s_log_approx_tests

TESTENTRY_DBL_APPROX s_log_approx_tests[]

static

Definition at line 54 of file log.c.

Referenced by Test_log_approx(), and Test_logf_approx().

s_log_exact_tests

TESTENTRY_DBL s_log_exact_tests[]

static

Initial value:

=
{
    { 0x0000000000000000 , 0xfff0000000000000  },
    { 0x8000000000000000 , 0xfff0000000000000  },
    { 0x7ff0000000000000 , 0x7ff0000000000000  },
    { 0x7ff0000000000001 , 0x7ff8000000000001  },
    { 0x7ff7ffffffffffff , 0x7fffffffffffffff  },
    { 0x7ff8000000000000 , 0x7ff8000000000000  },
    { 0x7ff8000000000001 , 0x7ff8000000000001  },
    { 0x7fffffffffffffff , 0x7fffffffffffffff  },
    { 0xfff0000000000000 , 0xfff8000000000000  },
    { 0xfff0000000000001 , 0xfff8000000000001  },
    { 0xfff7ffffffffffff , 0xffffffffffffffff  },
    { 0xfff8000000000000 , 0xfff8000000000000  },
    { 0xfff8000000000001 , 0xfff8000000000001  },
    { 0xffffffffffffffff , 0xffffffffffffffff  },
}

Definition at line 25 of file log.c.

Referenced by Test_log_exact().

s_logf_approx_tests

TESTENTRY_DBL_APPROX s_logf_approx_tests[]

static

Definition at line 148 of file log.c.

Referenced by Test_logf_approx().

s_logf_exact_tests

TESTENTRY_DBL s_logf_exact_tests[]

static

Initial value:

=
{
    { 0x00000000 , 0xff800000  },
    { 0x80000000 , 0xff800000  },
    { 0x7f800000 , 0xff800000  },
    { 0x7f800001 , 0xff800000  },
    { 0x7fBFffff , 0xff800000  },
    { 0x7fC00000 , 0xff800000  },
    { 0x7fC80001 , 0xff800000  },
    { 0x7fFfffff , 0xff800000  },
    { 0xff800000 , 0xff800000  },
    { 0xff800001 , 0xff800000  },
    { 0xffBfffff , 0xff800000  },
    { 0xffC00000 , 0xff800000  },
    { 0xfff80001 , 0xff800000  },
    { 0xffffffff , 0xff800000  },
}

Definition at line 116 of file log.c.

Referenced by Test_logf_exact().