idea.cpp File Reference

#include "pch.h"
#include "idea.h"
#include "misc.h"
#include "secblock.h"

Include dependency graph for idea.cpp:

Go to the source code of this file.

Macros
#define	low16(x)   ((x)&0xffff)
#define	high16(x)   ((x)>>16)
#define	DirectMUL(a, b)
#define	MUL(a, b)   DirectMUL(a,b)

Functions
	CRYPTOPP_COMPILE_ASSERT (sizeof(IDEA::Word) >=2)

Macro Definition Documentation

#define DirectMUL	(		a,
			b
	)

Value:

{                                                                               \
	word32 p=(word32)low16(a)*b;           \
										\
	if (p)                                                         \
        {                                                                       \
                p = low16(p) - high16(p);               \
		a = (IDEA::Word)p - (IDEA::Word)high16(p);    \
        }                                                                       \
	else								\
		a = 1-a-b;                                            \
}

Definition at line 18 of file idea.cpp.

#define high16

(

x

)

((x)>>16)

Definition at line 13 of file idea.cpp.

#define low16

(

x

)

((x)&0xffff)

Definition at line 12 of file idea.cpp.

#define MUL	(		a,
			b
	)		DirectMUL(a,b)

Definition at line 154 of file idea.cpp.

Function Documentation

CRYPTOPP_COMPILE_ASSERT

(

sizeof(IDEA::Word) >=

2

)