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ggidev-invert_3

ggidev-invert_3

Section: GGI (3) Updated: 2006-12-30
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NAME

ggidev-invert_3, ggidev-lshift_3, ggidev-rshift_3 - Bitwise triple-int operations  

SYNOPSIS

#include <ggi/internal/triple-int.h>

unsigned *invert_3(unsigned x[3]);

unsigned *lshift_3(unsigned l[3], unsigned r);
unsigned *rshift_3(unsigned l[3], unsigned r);

 

DESCRIPTION

invert_3 inverts all bits of x. Equivalent to x=~x.

lshift_3 shifts l to the left by r bits. Equivalent to l<<=r.

rshift_3 shifts l to the right by r bits. This shift is arithmetic, so the sign of l is kept as is. Equivalent to l>>=r.  

RETURN VALUE

invert_3 returns a pointer to x which has been updated in place.

Both lshift_3 and rshift_3 return a pointer to l which has been updated in place.  

EXAMPLES

Some bitwise operations on triple-ints:

unsigned x[3];

assign_int_3(x, -4);
invert_3(x);     /* x is now 3 */
lshift_3(x, 42); /* x is now 3*2^42, if that fits in a triple-int */
rshift_3(x, 17); /* x is now 3*2^25 */

 

SEE ALSO

ggidev-triple-int(7), ggidev-assign_int_3(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLES
SEE ALSO

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Time: 21:46:51 GMT, April 16, 2011