Ase::FloatIEEE754 Union Reference

Union to compartmentalize an IEEE-754 float. More...

#include "mathutils.hh"

Public Attributes
float	v_float
struct {
uint	mantissa: 23
uint	biased_exponent: 8
uint	sign: 1
}	mpn
char	chars [4]

Static Public Attributes
static constexpr const float	EPSILON
	2^-24, round-off error at 1.0
static constexpr const int	BIAS
	Exponent bias.
static constexpr const float	FMAX
	0x7f7fffff, 2^128 * (1 - epsilon)
static constexpr const float	FMIN
	0x00800000 Minimum Normal
static constexpr const float	SMAX
	0x007fffff Maximum Subnormal
static constexpr const float	SMIN
	0x00000001 Minimum Subnormal

Detailed Description

Union to compartmentalize an IEEE-754 float.

IEEE 754 single precision floating point layout:

       31 30           23 22            0
+--------+---------------+---------------+
| s 1bit | e[30:23] 8bit | f[22:0] 23bit |
+--------+---------------+---------------+
B0------------------->B1------->B2-->B3-->

Definition at line 32 of file mathutils.hh.

Member Data Documentation

BIAS

constexpr const int Ase::FloatIEEE754::BIAS

staticconstexpr

Exponent bias.

Definition at line 43 of file mathutils.hh.

Referenced by Ase::fast_exp2(), and Ase::fast_log2().

chars

char Ase::FloatIEEE754::chars[4]

Definition at line 41 of file mathutils.hh.

EPSILON

constexpr const float Ase::FloatIEEE754::EPSILON

staticconstexpr

2^-24, round-off error at 1.0

Definition at line 42 of file mathutils.hh.

FMAX

constexpr const float Ase::FloatIEEE754::FMAX

staticconstexpr

0x7f7fffff, 2^128 * (1 - epsilon)

Definition at line 44 of file mathutils.hh.

FMIN

constexpr const float Ase::FloatIEEE754::FMIN

staticconstexpr

0x00800000 Minimum Normal

Definition at line 45 of file mathutils.hh.

SMAX

constexpr const float Ase::FloatIEEE754::SMAX

staticconstexpr

0x007fffff Maximum Subnormal

Definition at line 46 of file mathutils.hh.

SMIN

constexpr const float Ase::FloatIEEE754::SMIN

staticconstexpr

0x00000001 Minimum Subnormal

Definition at line 47 of file mathutils.hh.

v_float

float Ase::FloatIEEE754::v_float

Definition at line 33 of file mathutils.hh.

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The documentation for this union was generated from the following file:

• ase/mathutils.hh