minix/lib/ack/fphook/ngf4.fc

28 lines
524 B
Text
Raw Normal View History

/*
(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Header$ */
/*
NEGATE A FLOATING POINT (NGF 4)
*/
/********************************************************/
#include "FP_types.h"
#include "get_put.h"
#define OFF ((FL_MSW_AT_LOW_ADDRESS ? 0 : 2) + (FL_MSB_AT_LOW_ADDRESS ? 0 : 1))
void
ngf4(f)
SINGLE f;
{
unsigned char *p;
if (f != (SINGLE) 0) {
p = (unsigned char *) &f + OFF;
*p ^= 0x80;
}
}