30 lines
599 B
C
30 lines
599 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))
|
|
|
|
_double
|
|
ngf8(f)
|
|
_double f;
|
|
{
|
|
unsigned char *p;
|
|
|
|
if (f.__double[0] != 0 || f.__double[1] != 0) {
|
|
p = (unsigned char *) &f + OFF;
|
|
*p ^= 0x80;
|
|
}
|
|
return f;
|
|
}
|