utildev.h File Reference

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#include <stddef.h>
#include <stdint.h>

Detailed Description

Device utilities and includes support.

Provides utilities and includes for device architectures.

Architecture	Supported
CPU	Yes
CUDA	Yes
OPENCL	No

Copyright

This file is released into the Public Domain under the Creative Commons Zero v1.0 Universal license.

Macros
#define	bswap32(x)    ( (rol32(x, 24) & 0xFF00FF00) | (rol32(x, 8) & 0x00FF00FF) )
	Swap the byte order of a 32-bit word. More...
#define	rol32(x, n)   ( ((x) << (n)) | ((x) >> (32 - (n))) )
	Rotate a 32-bit word left by n bits. More...
#define	rol64(x, n)   ( ((x) << (n)) | ((x) >> (64 - (n))) )
	Rotate a 64-bit word left by n bits. More...
#define	ror32(x, n)   ( ((x) >> (n)) | ((x) << (32 - (n))) )
	Rotate a 32-bit word right by n bits. More...
#define	ror64(x, n)   ( ((x) >> (n)) | ((x) << (64 - (n))) )
	Rotate a 64-bit word right by n bits. More...
#define	xandx(a, b, c)   ( ((a) & ((b) ^ (c))) ^ (c) )
	Perform an XANDX operation. More...
#define	xor3(a, b, c)   ( (a) ^ (b) ^ (c) )
	XOR 3 values together. More...
#define	xor4(a, b, c, d)   ( (a) ^ (b) ^ (c) ^ (d) )
	XOR 4 values together. More...

Macro Definition Documentation

bswap32

#define bswap32

(

x

)

( (rol32(x, 24) & 0xFF00FF00) | (rol32(x, 8) & 0x00FF00FF) )

Swap the byte order of a 32-bit word.

Alternate expansion for nvcc: __byte_perm(x, 0, 0x0123)

Parameters

x	32-bit word to be swapped

Returns

32-bit word with swapped byte ordering.

rol32

#define rol32	(		x,
			n
	)		( ((x) << (n)) | ((x) >> (32 - (n))) )

Rotate a 32-bit word left by n bits.

Parameters

x	32-bit word to rotate
n	Number of bits to rotate left by

Returns

32-bit word rotated left by n bits.

rol64

#define rol64	(		x,
			n
	)		( ((x) << (n)) | ((x) >> (64 - (n))) )

Rotate a 64-bit word left by n bits.

Parameters

x	64-bit word to rotate
n	Number of bits to rotate left by

Returns

64-bit word rotated left by n bits.

ror32

#define ror32	(		x,
			n
	)		( ((x) >> (n)) | ((x) << (32 - (n))) )

Rotate a 32-bit word right by n bits.

Parameters

x	32-bit word to rotate
n	Number of bits to rotate right by

Returns

32-bit word rotated right by n bits.

ror64

#define ror64	(		x,
			n
	)		( ((x) >> (n)) | ((x) << (64 - (n))) )

Rotate a 64-bit word right by n bits.

Parameters

x	64-bit word to rotate
n	Number of bits to rotate right by

Returns

64-bit word rotated right by n bits.

xandx

#define xandx	(		a,
			b,
			c
	)		( ((a) & ((b) ^ (c))) ^ (c) )

Perform an XANDX operation.

An XANDX operation is composed of a XOR, an AND and another XOR in the form:

( (((a) & ((b) ^ (c))) ^ (c) ) 

Parameters

a	first parameter
b	second parameter
c	third parameter

Returns

result of XANDX operation.

xor3

#define xor3	(		a,
			b,
			c
	)		( (a) ^ (b) ^ (c) )

XOR 3 values together.

Performs 2x XOR operations.

Parameters

a	first parameter
b	second parameter
c	third parameter

Returns

result of 2x XOR operations.

xor4

#define xor4	(		a,
			b,
			c,
			d
	)		( (a) ^ (b) ^ (c) ^ (d) )

XOR 4 values together.

Performs 3x XOR operations.

Parameters

a	first parameter
b	second parameter
c	third parameter
d	fourth parameter

Returns

result of 3x XOR operations.