forked from luck/tmp_suning_uos_patched
660662f857
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>
316 lines
7.8 KiB
C
316 lines
7.8 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/spmath/fcnvfxt.c $Revision: 1.1 $
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*
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* Purpose:
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* Single Floating-point to Single Fixed-point /w truncated result
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* Single Floating-point to Double Fixed-point /w truncated result
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* Double Floating-point to Single Fixed-point /w truncated result
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* Double Floating-point to Double Fixed-point /w truncated result
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*
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* External Interfaces:
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* dbl_to_dbl_fcnvfxt(srcptr,nullptr,dstptr,status)
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* dbl_to_sgl_fcnvfxt(srcptr,nullptr,dstptr,status)
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* sgl_to_dbl_fcnvfxt(srcptr,nullptr,dstptr,status)
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* sgl_to_sgl_fcnvfxt(srcptr,nullptr,dstptr,status)
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*
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* Internal Interfaces:
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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 "cnv_float.h"
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/*
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* Convert single floating-point to single fixed-point format
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* with truncated result
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*/
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/*ARGSUSED*/
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int
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sgl_to_sgl_fcnvfxt(
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sgl_floating_point *srcptr,
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unsigned int *nullptr,
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int *dstptr,
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unsigned int *status)
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{
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register unsigned int src, temp;
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register int src_exponent, result;
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src = *srcptr;
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src_exponent = Sgl_exponent(src) - SGL_BIAS;
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/*
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* Test for overflow
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*/
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if (src_exponent > SGL_FX_MAX_EXP) {
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/* check for MININT */
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if ((src_exponent > SGL_FX_MAX_EXP + 1) ||
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Sgl_isnotzero_mantissa(src) || Sgl_iszero_sign(src)) {
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if (Sgl_iszero_sign(src)) result = 0x7fffffff;
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else result = 0x80000000;
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if (Is_invalidtrap_enabled()) {
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return(INVALIDEXCEPTION);
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}
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Set_invalidflag();
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*dstptr = result;
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return(NOEXCEPTION);
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}
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}
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/*
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* Generate result
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*/
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if (src_exponent >= 0) {
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temp = src;
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Sgl_clear_signexponent_set_hidden(temp);
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Int_from_sgl_mantissa(temp,src_exponent);
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if (Sgl_isone_sign(src)) result = -Sgl_all(temp);
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else result = Sgl_all(temp);
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*dstptr = result;
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/* check for inexact */
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if (Sgl_isinexact_to_fix(src,src_exponent)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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else {
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*dstptr = 0;
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/* check for inexact */
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if (Sgl_isnotzero_exponentmantissa(src)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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return(NOEXCEPTION);
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}
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/*
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* Single Floating-point to Double Fixed-point
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*/
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/*ARGSUSED*/
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int
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sgl_to_dbl_fcnvfxt(
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sgl_floating_point *srcptr,
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unsigned int *nullptr,
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dbl_integer *dstptr,
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unsigned int *status)
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{
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register int src_exponent, resultp1;
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register unsigned int src, temp, resultp2;
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src = *srcptr;
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src_exponent = Sgl_exponent(src) - SGL_BIAS;
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/*
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* Test for overflow
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*/
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if (src_exponent > DBL_FX_MAX_EXP) {
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/* check for MININT */
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if ((src_exponent > DBL_FX_MAX_EXP + 1) ||
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Sgl_isnotzero_mantissa(src) || Sgl_iszero_sign(src)) {
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if (Sgl_iszero_sign(src)) {
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resultp1 = 0x7fffffff;
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resultp2 = 0xffffffff;
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}
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else {
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resultp1 = 0x80000000;
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resultp2 = 0;
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}
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if (Is_invalidtrap_enabled()) {
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return(INVALIDEXCEPTION);
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}
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Set_invalidflag();
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Dint_copytoptr(resultp1,resultp2,dstptr);
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return(NOEXCEPTION);
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}
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Dint_set_minint(resultp1,resultp2);
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Dint_copytoptr(resultp1,resultp2,dstptr);
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return(NOEXCEPTION);
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}
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/*
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* Generate result
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*/
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if (src_exponent >= 0) {
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temp = src;
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Sgl_clear_signexponent_set_hidden(temp);
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Dint_from_sgl_mantissa(temp,src_exponent,resultp1,resultp2);
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if (Sgl_isone_sign(src)) {
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Dint_setone_sign(resultp1,resultp2);
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}
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Dint_copytoptr(resultp1,resultp2,dstptr);
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/* check for inexact */
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if (Sgl_isinexact_to_fix(src,src_exponent)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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else {
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Dint_setzero(resultp1,resultp2);
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Dint_copytoptr(resultp1,resultp2,dstptr);
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/* check for inexact */
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if (Sgl_isnotzero_exponentmantissa(src)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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return(NOEXCEPTION);
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}
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/*
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* Double Floating-point to Single Fixed-point
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*/
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/*ARGSUSED*/
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int
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dbl_to_sgl_fcnvfxt(
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dbl_floating_point *srcptr,
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unsigned int *nullptr,
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int *dstptr,
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unsigned int *status)
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{
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register unsigned int srcp1, srcp2, tempp1, tempp2;
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register int src_exponent, result;
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Dbl_copyfromptr(srcptr,srcp1,srcp2);
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src_exponent = Dbl_exponent(srcp1) - DBL_BIAS;
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/*
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* Test for overflow
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*/
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if (src_exponent > SGL_FX_MAX_EXP) {
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/* check for MININT */
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if (Dbl_isoverflow_to_int(src_exponent,srcp1,srcp2)) {
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if (Dbl_iszero_sign(srcp1)) result = 0x7fffffff;
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else result = 0x80000000;
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if (Is_invalidtrap_enabled()) {
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return(INVALIDEXCEPTION);
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}
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Set_invalidflag();
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*dstptr = result;
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return(NOEXCEPTION);
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}
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}
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/*
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* Generate result
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*/
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if (src_exponent >= 0) {
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tempp1 = srcp1;
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tempp2 = srcp2;
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Dbl_clear_signexponent_set_hidden(tempp1);
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Int_from_dbl_mantissa(tempp1,tempp2,src_exponent);
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if (Dbl_isone_sign(srcp1) && (src_exponent <= SGL_FX_MAX_EXP))
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result = -Dbl_allp1(tempp1);
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else result = Dbl_allp1(tempp1);
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*dstptr = result;
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/* check for inexact */
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if (Dbl_isinexact_to_fix(srcp1,srcp2,src_exponent)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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else {
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*dstptr = 0;
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/* check for inexact */
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if (Dbl_isnotzero_exponentmantissa(srcp1,srcp2)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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return(NOEXCEPTION);
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}
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/*
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* Double Floating-point to Double Fixed-point
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*/
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/*ARGSUSED*/
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int
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dbl_to_dbl_fcnvfxt(
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dbl_floating_point *srcptr,
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unsigned int *nullptr,
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dbl_integer *dstptr,
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unsigned int *status)
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{
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register int src_exponent, resultp1;
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register unsigned int srcp1, srcp2, tempp1, tempp2, resultp2;
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Dbl_copyfromptr(srcptr,srcp1,srcp2);
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src_exponent = Dbl_exponent(srcp1) - DBL_BIAS;
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/*
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* Test for overflow
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*/
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if (src_exponent > DBL_FX_MAX_EXP) {
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/* check for MININT */
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if ((src_exponent > DBL_FX_MAX_EXP + 1) ||
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Dbl_isnotzero_mantissa(srcp1,srcp2) || Dbl_iszero_sign(srcp1)) {
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if (Dbl_iszero_sign(srcp1)) {
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resultp1 = 0x7fffffff;
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resultp2 = 0xffffffff;
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}
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else {
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resultp1 = 0x80000000;
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resultp2 = 0;
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}
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if (Is_invalidtrap_enabled()) {
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return(INVALIDEXCEPTION);
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}
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Set_invalidflag();
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Dint_copytoptr(resultp1,resultp2,dstptr);
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return(NOEXCEPTION);
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}
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}
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/*
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* Generate result
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*/
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if (src_exponent >= 0) {
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tempp1 = srcp1;
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tempp2 = srcp2;
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Dbl_clear_signexponent_set_hidden(tempp1);
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Dint_from_dbl_mantissa(tempp1,tempp2,src_exponent,
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resultp1,resultp2);
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if (Dbl_isone_sign(srcp1)) {
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Dint_setone_sign(resultp1,resultp2);
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}
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Dint_copytoptr(resultp1,resultp2,dstptr);
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/* check for inexact */
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if (Dbl_isinexact_to_fix(srcp1,srcp2,src_exponent)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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else {
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Dint_setzero(resultp1,resultp2);
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Dint_copytoptr(resultp1,resultp2,dstptr);
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/* check for inexact */
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if (Dbl_isnotzero_exponentmantissa(srcp1,srcp2)) {
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if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
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else Set_inexactflag();
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}
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}
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return(NOEXCEPTION);
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}
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