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Kernel

fixed16.h File Reference

(r1785/r1261)

#include "fixed.h"

Go to the source code of this file.

Classes

class  fixed16

Defines

#define F16SHIFT   16
#define SHORT_FIXED(x)   ( ((INT32)(x)) << F16SHIFT )
#define F16ASSIGN(it)   it
#define F16ASSIGNTHIS   *this
#define FIXED16_DBL(d)   fixed16::FromRawLong((INT32)((d)*65536))

Functions

fixed16 operator+ (const fixed16 &operand1, const fixed16 &operand2)
fixed16 operator- (const fixed16 &operand1, const fixed16 &operand2)
fixed16 operator- (const fixed16 &operand)
fixed16 operator * (const fixed16 &operand1, const fixed16 &operand2)
fixed16 operator/ (const fixed16 &operand1, const fixed16 &operand2)
fixed16 operator>> (const fixed16 &operand1, UINT32 operand2)
fixed16 operator<< (const fixed16 &operand1, UINT32 operand2)
INT32 operator== (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator== (const fixed16 &operand1, const short operand2)
INT32 operator!= (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator!= (const fixed16 &operand1, const short operand2)
INT32 operator> (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator> (const fixed16 &operand1, const short operand2)
INT32 operator< (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator< (const fixed16 &operand1, const short operand2)
INT32 operator>= (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator>= (const fixed16 &operand1, const short operand2)
INT32 operator<= (const fixed16 &operand1, const fixed16 &operand2)
INT32 operator<= (const fixed16 &operand1, const short operand2)

Variables

const INT32 FIXED16_ONE = 0x10000L
 An FIXED16 is a signed 32-bit value with a binary point between bits 15 and 16. Its purpose is to represent 32-bit floating point numbers. FIXED16 is a fixed point number contained within a 32-bit longword. The high 16-bit half contains the integer part, the low half the fractional. (Intel implementations store this as the low half first in memory). The integer half ranges from -32768 to 32767, the fractional part from 0 to 65535/65536ths (1/65536th= 0.000015259, 65535/65536=0.999984741). For efficiency all primitives are written in assembly-language, though most are used transparently by operator overloading. No-one should include fixed16.h directly - always use ccmath.h. You should also never use the lower-case type 'fixed16' - always used 'FIXED16'.
const INT32 FIXED16_HALF = 0x08000L
CCAPI xlong
CCAPI String

Define Documentation

#define F16ASSIGN (  it   )     it
 

Definition at line 238 of file fixed16.h.

#define F16ASSIGNTHIS   *this
 

Definition at line 239 of file fixed16.h.

#define F16SHIFT   16
 

Definition at line 151 of file fixed16.h.

#define FIXED16_DBL (  d   )     fixed16::FromRawLong((INT32)((d)*65536))
 

Note that all the comment blocks live in the cpp files so they get compiled in with the help compiler

Definition at line 250 of file fixed16.h.

#define SHORT_FIXED (  x   )     ( ((INT32)(x)) << F16SHIFT )
 

Definition at line 154 of file fixed16.h.

Function Documentation

fixed16 operator * (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 376 of file fixed16.h.

00377 {
00378     fixed16 result;
00379     F16ASSIGN(result) = Fixed16Mul( operand1, operand2 );
00380     return result;
00381 }

INT32 operator!= (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 421 of file fixed16.h.

00422 {
00423     return operand1.all != SHORT_FIXED( operand2 );
00424 }

INT32 operator!= (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 416 of file fixed16.h.

00417 {
00418     return operand1.all != operand2.all;
00419 }

fixed16 operator+ (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 355 of file fixed16.h.

00356 {
00357     fixed16 result;
00358     result.all = operand1.all + operand2.all;
00359     return result;
00360 }

fixed16 operator- (  const fixed16 &  operand  )  [inline]
 

Definition at line 369 of file fixed16.h.

00370 {
00371     fixed16 temp;
00372     temp.all = -operand.all;
00373     return temp;
00374 }

fixed16 operator- (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 362 of file fixed16.h.

00363 {
00364     fixed16 result;
00365     result.all = operand1.all - operand2.all;
00366     return result;
00367 }

fixed16 operator/ (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 383 of file fixed16.h.

00384 {
00385     fixed16 result;
00386     F16ASSIGN(result) = Fixed16Div( operand1, operand2 );
00387     return result;
00388 }

INT32 operator< (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 441 of file fixed16.h.

00442 {
00443     return operand1.all < SHORT_FIXED( operand2 );
00444 }

INT32 operator< (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 436 of file fixed16.h.

00437 {
00438     return operand1.all < operand2.all;
00439 }

fixed16 operator<< (  const fixed16 &  operand1,
UINT32  operand2
)  [inline]
 

Definition at line 397 of file fixed16.h.

00398 {
00399     fixed16 result;
00400     
00401     result.all = operand1.all << operand2;
00402     
00403     return result;
00404 }

INT32 operator<= (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 461 of file fixed16.h.

00462 {
00463     return operand1.all <= SHORT_FIXED( operand2 );
00464 }

INT32 operator<= (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 456 of file fixed16.h.

00457 {
00458     return operand1.all <= operand2.all;
00459 }

INT32 operator== (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 411 of file fixed16.h.

00412 {
00413     return operand1.all == SHORT_FIXED( operand2 );
00414 }

INT32 operator== (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 406 of file fixed16.h.

00407 {
00408     return operand1.all == operand2.all;
00409 }

INT32 operator> (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 431 of file fixed16.h.

00432 {
00433     return operand1.all > SHORT_FIXED(operand2);
00434 }

INT32 operator> (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 426 of file fixed16.h.

00427 {
00428     return operand1.all > operand2.all;
00429 }

INT32 operator>= (  const fixed16 &  operand1,
const short  operand2
)  [inline]
 

Definition at line 451 of file fixed16.h.

00452 {
00453     return operand1.all >= SHORT_FIXED( operand2 );
00454 }

INT32 operator>= (  const fixed16 &  operand1,
const fixed16 &  operand2
)  [inline]
 

Definition at line 446 of file fixed16.h.

00447 {
00448     return operand1.all >= operand2.all;
00449 }

fixed16 operator>> (  const fixed16 &  operand1,
UINT32  operand2
)  [inline]
 

Definition at line 390 of file fixed16.h.

00391 {
00392     fixed16 result;
00393     result.all = operand1.all >> operand2;
00394     return result;
00395 }

Variable Documentation

const INT32 FIXED16_HALF = 0x08000L
 

Definition at line 134 of file fixed16.h.

const INT32 FIXED16_ONE = 0x10000L
 

An FIXED16 is a signed 32-bit value with a binary point between bits 15 and 16. Its purpose is to represent 32-bit floating point numbers. FIXED16 is a fixed point number contained within a 32-bit longword. The high 16-bit half contains the integer part, the low half the fractional. (Intel implementations store this as the low half first in memory). The integer half ranges from -32768 to 32767, the fractional part from 0 to 65535/65536ths (1/65536th= 0.000015259, 65535/65536=0.999984741). For efficiency all primitives are written in assembly-language, though most are used transparently by operator overloading. No-one should include fixed16.h directly - always use ccmath.h. You should also never use the lower-case type 'fixed16' - always used 'FIXED16'.

Author:
Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
Date:
26/4/1993
See also:
CCMaths.h

Fixedasm.h

Div32By32

Keyword FIXED16

Returns:
Errors: None.

Definition at line 133 of file fixed16.h.

class CCAPI String
 

Definition at line 140 of file fixed16.h.

class CCAPI xlong
 

Definition at line 137 of file fixed16.h.

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