Fast 32-bit maths
[Miscellaneous]

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Detailed Description

Fast conversions.

The VM creates its own environment, which is used to (un)serialize programs. The map supports indexed access to keys and values and random access by key lookup.

Data Structures
union	_intfloat_conv
	union to reinterpret bits in a word as an integer and a float. More...
#define	fast_apply_bin_int_func(_ta, _a, _tb, _b, _op, _ret)
	Ease writing of arithmetic opcodes.
#define	fast_apply_bin_func(_ta, _a, _tb, _b, _opi, _opf, _ret, _ret_typ)
	Ease writing of arithmetic opcodes.
Defines
#define	BIAS_HEX   ( ((23+127)<<23) + (1<<22) )
	Magic converting bias, hex version.
#define	BIAS_INT   ((long int)BIAS_HEX)
	Converting bias as an int.
#define	BIAS_FLOAT   ((float)12582912.0f)
	Converting bias as a float.
Typedefs
typedef union _intfloat_conv	_IFC
Functions
static long int	f2i (float f)
	Convert from float to int.
static float	i2f (long int i)
	Convert from int to float.

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Define Documentation

#define BIAS_HEX   ( ((23+127)<<23) + (1<<22) )

Magic converting bias, hex version.

#define BIAS_INT   ((long int)BIAS_HEX)

Converting bias as an int.

#define BIAS_FLOAT   ((float)12582912.0f)

Converting bias as a float.

#define fast_apply_bin_int_func	(	_ta,
		_a,
		_tb,
		_b,
		_op,
		_ret		)

Value:

do {\
                _IFC _R;\
                switch((((word_t)_ta)<<1)|((word_t)_tb)) {\
                case 0:\
                        _R.i = _op((_a), (_b));\
                        break;\
                case 1:\
                        _R.i = _op((_a), f2i(_b));\
                        break;\
                case 2:\
                        _R.i = _op(f2i(_a), (_b));\
                        break;\
                case 3:\
                        _R.i = _op(f2i(_a), f2i(_b));\
                };\
                _ret=_R.i;\
        } while(0)

Ease writing of arithmetic opcodes.

#define fast_apply_bin_func	(	_ta,
		_a,
		_tb,
		_b,
		_opi,
		_opf,
		_ret,
		_ret_typ		)

Value:

do {\
                _IFC _R,_X,_Y;\
                switch((((word_t)_ta)<<1)|((word_t)_tb)) {\
                case 0:\
                        _R.i = _opi((_a), (_b));\
                        break;\
                case 1:\
                        _X.i = (_b);\
                        _R.f = _opf(i2f(_a), _X.f);\
                        break;\
                case 2:\
                        _X.i = (_a);\
                        _R.f = _opf(_X.f, i2f(_b));\
                        break;\
                case 3:\
                        _X.i = (_a);\
                        _Y.i = (_b);\
                        _R.f = _opf(_X.f, _Y.f);\
                };\
                _ret_typ=(_ta|_tb);\
                _ret=_R.i;\
        } while(0)

Ease writing of arithmetic opcodes.

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Typedef Documentation

typedef union _intfloat_conv _IFC

_brief Public type for conversion union.

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Function Documentation

static long int f2i

(

float

f

)

[inline, static]

Convert from float to int.

static float i2f

(

long int

i

)

[inline, static]

Convert from int to float.

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