minix/lib/float/ngf8.c
2009-11-09 10:26:00 +00:00

28 lines
570 B
C

/*
(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 8)
*/
/********************************************************/
#include "FP_types.h"
#include "get_put.h"
#define OFF ((FL_MSL_AT_LOW_ADDRESS ? 0 : 4) + (FL_MSW_AT_LOW_ADDRESS ? 0 : 2) + (FL_MSB_AT_LOW_ADDRESS ? 0 : 1))
void
ngf8(f)
DOUBLE f;
{
unsigned char *p;
if (f.d[0] != 0 || f.d[1] != 0) {
p = (unsigned char *) &f + OFF;
*p ^= 0x80;
}
}