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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 42 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100845.259718220@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Linux/PA-RISC Project (http://www.parisc-linux.org/)
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*
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* Floating-point emulation code
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* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
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*/
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/*
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* BEGIN_DESC
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*
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* File:
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* @(#) pa/fp/denormal.c $ Revision: $
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*
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* Purpose:
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* <<please update with a synopsis of the functionality provided by this file>>
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*
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* External Interfaces:
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* <<the following list was autogenerated, please review>>
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* dbl_denormalize(dbl_opndp1,dbl_opndp2,inexactflag,rmode)
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* sgl_denormalize(sgl_opnd,inexactflag,rmode)
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*
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* Internal Interfaces:
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* <<please update>>
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*
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* Theory:
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* <<please update with a overview of the operation of this file>>
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*
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* END_DESC
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*/
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#include "float.h"
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#include "sgl_float.h"
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#include "dbl_float.h"
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#include "hppa.h"
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#include <linux/kernel.h>
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/* #include <machine/sys/mdep_private.h> */
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#undef Fpustatus_register
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#define Fpustatus_register Fpu_register[0]
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void
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sgl_denormalize(unsigned int *sgl_opnd, boolean *inexactflag, int rmode)
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{
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unsigned int opnd;
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int sign, exponent;
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boolean guardbit = FALSE, stickybit, inexact;
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opnd = *sgl_opnd;
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stickybit = *inexactflag;
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exponent = Sgl_exponent(opnd) - SGL_WRAP;
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sign = Sgl_sign(opnd);
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Sgl_denormalize(opnd,exponent,guardbit,stickybit,inexact);
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if (inexact) {
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switch (rmode) {
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case ROUNDPLUS:
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if (sign == 0) {
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Sgl_increment(opnd);
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}
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break;
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case ROUNDMINUS:
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if (sign != 0) {
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Sgl_increment(opnd);
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}
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break;
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case ROUNDNEAREST:
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if (guardbit && (stickybit ||
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Sgl_isone_lowmantissa(opnd))) {
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Sgl_increment(opnd);
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}
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break;
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}
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}
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Sgl_set_sign(opnd,sign);
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*sgl_opnd = opnd;
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*inexactflag = inexact;
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return;
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}
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void
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dbl_denormalize(unsigned int *dbl_opndp1,
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unsigned int * dbl_opndp2,
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boolean *inexactflag,
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int rmode)
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{
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unsigned int opndp1, opndp2;
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int sign, exponent;
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boolean guardbit = FALSE, stickybit, inexact;
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opndp1 = *dbl_opndp1;
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opndp2 = *dbl_opndp2;
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stickybit = *inexactflag;
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exponent = Dbl_exponent(opndp1) - DBL_WRAP;
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sign = Dbl_sign(opndp1);
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Dbl_denormalize(opndp1,opndp2,exponent,guardbit,stickybit,inexact);
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if (inexact) {
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switch (rmode) {
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case ROUNDPLUS:
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if (sign == 0) {
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Dbl_increment(opndp1,opndp2);
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}
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break;
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case ROUNDMINUS:
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if (sign != 0) {
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Dbl_increment(opndp1,opndp2);
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}
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break;
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case ROUNDNEAREST:
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if (guardbit && (stickybit ||
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Dbl_isone_lowmantissap2(opndp2))) {
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Dbl_increment(opndp1,opndp2);
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}
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break;
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}
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}
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Dbl_set_sign(opndp1,sign);
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*dbl_opndp1 = opndp1;
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*dbl_opndp2 = opndp2;
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*inexactflag = inexact;
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return;
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}
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