atan.c File Reference

#include "math_helpers.h"

Include dependency graph for atan.c:

Go to the source code of this file.

Macros
#define	_CRTBLD
#define	HAS_ATANF

Functions
void	Test_atan_exact (void)
void	Test_atan_approx (void)
void	Test_atanf_exact (void)
void	Test_atanf_approx (void)
	START_TEST (atan)

Variables
static TESTENTRY_DBL	s_atan_exact_tests []
static TESTENTRY_DBL_APPROX	s_atan_approx_tests []
static TESTENTRY_DBL	s_atanf_exact_tests []
static TESTENTRY_DBL_APPROX	s_atanf_approx_tests []

Macro Definition Documentation

_CRTBLD

#define _CRTBLD

Definition at line 9 of file atan.c.

HAS_ATANF

#define HAS_ATANF

Definition at line 18 of file atan.c.

Function Documentation

START_TEST()

START_TEST

(

atan

)

Definition at line 375 of file atan.c.

{
    Test_atan_exact();
    Test_atan_approx();
#if defined(HAS_ATANF)
    Test_atanf_exact();
    Test_atanf_approx();
#endif
#if defined(HAS_LIBM_SSE2)
    Test_libm_sse2_atan();
    Test_libm_sse2_atanf();
#endif
}

Test_atan_approx()

void Test_atan_approx

(

void

)

Definition at line 158 of file atan.c.

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

Referenced by START_TEST().

Test_atan_exact()

void Test_atan_exact

(

void

)

Definition at line 43 of file atan.c.

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

Referenced by START_TEST().

Test_atanf_approx()

void Test_atanf_approx

(

void

)

Definition at line 315 of file atan.c.

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

Referenced by START_TEST().

Test_atanf_exact()

void Test_atanf_exact

(

void

)

Definition at line 193 of file atan.c.

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

Referenced by START_TEST().

Variable Documentation

s_atan_approx_tests

TESTENTRY_DBL_APPROX s_atan_approx_tests[]

static

Definition at line 54 of file atan.c.

Referenced by Test_atan_approx(), and Test_atanf_approx().

s_atan_exact_tests

TESTENTRY_DBL s_atan_exact_tests[]

static

Initial value:

=
{
    { 0x0000000000000000 , 0x0000000000000000  },
    { 0x8000000000000000 , 0x8000000000000000  },
    { 0x7ff0000000000000 , 0x3ff921fb54442d18  },
    { 0x7ff0000000000001 , 0x7ff8000000000001  },
    { 0x7ff7ffffffffffff , 0x7fffffffffffffff  },
    { 0x7ff8000000000000 , 0x7ff8000000000000  },
    { 0x7ff8000000000001 , 0x7ff8000000000001  },
    { 0x7fffffffffffffff , 0x7fffffffffffffff  },
    { 0xfff0000000000000 , 0xbff921fb54442d18  },
    { 0xfff0000000000001 , 0xfff8000000000001  },
    { 0xfff7ffffffffffff , 0xffffffffffffffff  },
    { 0xfff8000000000000 , 0xfff8000000000000  },
    { 0xfff8000000000001 , 0xfff8000000000001  },
    { 0xffffffffffffffff , 0xffffffffffffffff  },
}

Definition at line 25 of file atan.c.

Referenced by Test_atan_exact().

s_atanf_approx_tests

TESTENTRY_DBL_APPROX s_atanf_approx_tests[]

static

Definition at line 207 of file atan.c.

Referenced by Test_atanf_approx().

s_atanf_exact_tests

TESTENTRY_DBL s_atanf_exact_tests[]

static

Initial value:

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

Definition at line 175 of file atan.c.

Referenced by Test_atanf_exact().