mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 07:56:48 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
|
|
* Linux/PA-RISC Project (http://www.parisc-linux.org/)
|
|
*
|
|
* Floating-point emulation code
|
|
* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
/*
|
|
* BEGIN_DESC
|
|
*
|
|
* File:
|
|
* @(#) pa/fp/denormal.c $ Revision: $
|
|
*
|
|
* Purpose:
|
|
* <<please update with a synopsis of the functionality provided by this file>>
|
|
*
|
|
* External Interfaces:
|
|
* <<the following list was autogenerated, please review>>
|
|
* dbl_denormalize(dbl_opndp1,dbl_opndp2,inexactflag,rmode)
|
|
* sgl_denormalize(sgl_opnd,inexactflag,rmode)
|
|
*
|
|
* Internal Interfaces:
|
|
* <<please update>>
|
|
*
|
|
* Theory:
|
|
* <<please update with a overview of the operation of this file>>
|
|
*
|
|
* END_DESC
|
|
*/
|
|
|
|
|
|
|
|
#include "float.h"
|
|
#include "sgl_float.h"
|
|
#include "dbl_float.h"
|
|
#include "hppa.h"
|
|
#include <linux/kernel.h>
|
|
/* #include <machine/sys/mdep_private.h> */
|
|
|
|
#undef Fpustatus_register
|
|
#define Fpustatus_register Fpu_register[0]
|
|
|
|
void
|
|
sgl_denormalize(unsigned int *sgl_opnd, boolean *inexactflag, int rmode)
|
|
{
|
|
unsigned int opnd;
|
|
int sign, exponent;
|
|
boolean guardbit = FALSE, stickybit, inexact;
|
|
|
|
opnd = *sgl_opnd;
|
|
stickybit = *inexactflag;
|
|
exponent = Sgl_exponent(opnd) - SGL_WRAP;
|
|
sign = Sgl_sign(opnd);
|
|
Sgl_denormalize(opnd,exponent,guardbit,stickybit,inexact);
|
|
if (inexact) {
|
|
switch (rmode) {
|
|
case ROUNDPLUS:
|
|
if (sign == 0) {
|
|
Sgl_increment(opnd);
|
|
}
|
|
break;
|
|
case ROUNDMINUS:
|
|
if (sign != 0) {
|
|
Sgl_increment(opnd);
|
|
}
|
|
break;
|
|
case ROUNDNEAREST:
|
|
if (guardbit && (stickybit ||
|
|
Sgl_isone_lowmantissa(opnd))) {
|
|
Sgl_increment(opnd);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
Sgl_set_sign(opnd,sign);
|
|
*sgl_opnd = opnd;
|
|
*inexactflag = inexact;
|
|
return;
|
|
}
|
|
|
|
void
|
|
dbl_denormalize(unsigned int *dbl_opndp1,
|
|
unsigned int * dbl_opndp2,
|
|
boolean *inexactflag,
|
|
int rmode)
|
|
{
|
|
unsigned int opndp1, opndp2;
|
|
int sign, exponent;
|
|
boolean guardbit = FALSE, stickybit, inexact;
|
|
|
|
opndp1 = *dbl_opndp1;
|
|
opndp2 = *dbl_opndp2;
|
|
stickybit = *inexactflag;
|
|
exponent = Dbl_exponent(opndp1) - DBL_WRAP;
|
|
sign = Dbl_sign(opndp1);
|
|
Dbl_denormalize(opndp1,opndp2,exponent,guardbit,stickybit,inexact);
|
|
if (inexact) {
|
|
switch (rmode) {
|
|
case ROUNDPLUS:
|
|
if (sign == 0) {
|
|
Dbl_increment(opndp1,opndp2);
|
|
}
|
|
break;
|
|
case ROUNDMINUS:
|
|
if (sign != 0) {
|
|
Dbl_increment(opndp1,opndp2);
|
|
}
|
|
break;
|
|
case ROUNDNEAREST:
|
|
if (guardbit && (stickybit ||
|
|
Dbl_isone_lowmantissap2(opndp2))) {
|
|
Dbl_increment(opndp1,opndp2);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
Dbl_set_sign(opndp1,sign);
|
|
*dbl_opndp1 = opndp1;
|
|
*dbl_opndp2 = opndp2;
|
|
*inexactflag = inexact;
|
|
return;
|
|
}
|