1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 |
- // SPDX-License-Identifier: GPL-2.0-only
- /* IEEE754 floating point arithmetic
- * single precision
- */
- /*
- * MIPS floating point support
- * Copyright (C) 1994-2000 Algorithmics Ltd.
- */
- #include "ieee754sp.h"
- union ieee754sp ieee754sp_fint(int x)
- {
- unsigned int xm;
- int xe;
- int xs;
- ieee754_clearcx();
- if (x == 0)
- return ieee754sp_zero(0);
- if (x == 1 || x == -1)
- return ieee754sp_one(x < 0);
- if (x == 10 || x == -10)
- return ieee754sp_ten(x < 0);
- xs = (x < 0);
- if (xs) {
- if (x == (1 << 31))
- xm = ((unsigned) 1 << 31); /* max neg can't be safely negated */
- else
- xm = -x;
- } else {
- xm = x;
- }
- xe = SP_FBITS + 3;
- if (xm >> (SP_FBITS + 1 + 3)) {
- /* shunt out overflow bits
- */
- while (xm >> (SP_FBITS + 1 + 3)) {
- SPXSRSX1();
- }
- } else {
- /* normalize in grs extended single precision
- */
- while ((xm >> (SP_FBITS + 3)) == 0) {
- xm <<= 1;
- xe--;
- }
- }
- return ieee754sp_format(xs, xe, xm);
- }
|