From 16f504a9dca3fe3b70568f67b7d41241ae485288 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:49:04 +0200 Subject: Adding upstream version 7.0.6-dfsg. Signed-off-by: Daniel Baumann --- src/libs/softfloat-3e/source/f64_roundToInt.c | 122 ++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 src/libs/softfloat-3e/source/f64_roundToInt.c (limited to 'src/libs/softfloat-3e/source/f64_roundToInt.c') diff --git a/src/libs/softfloat-3e/source/f64_roundToInt.c b/src/libs/softfloat-3e/source/f64_roundToInt.c new file mode 100644 index 00000000..2b9ad1de --- /dev/null +++ b/src/libs/softfloat-3e/source/f64_roundToInt.c @@ -0,0 +1,122 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3e, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014, 2017 The Regents of the University of +California. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions, and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions, and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + 3. Neither the name of the University nor the names of its contributors may + be used to endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY +EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE +DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +=============================================================================*/ + +#include +#include +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" +#include /* VBox: for RT_FALL_THROUGH */ + +float64_t f64_roundToInt( float64_t a, uint_fast8_t roundingMode, bool exact SOFTFLOAT_STATE_DECL_COMMA ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + int_fast16_t exp; + uint_fast64_t uiZ, lastBitMask, roundBitsMask; + union ui64_f64 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uA.f = a; + uiA = uA.ui; + exp = expF64UI( uiA ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( exp <= 0x3FE ) { + if ( !(uiA & UINT64_C( 0x7FFFFFFFFFFFFFFF )) ) return a; + if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact; + uiZ = uiA & packToF64UI( 1, 0, 0 ); + switch ( roundingMode ) { + case softfloat_round_near_even: + if ( !fracF64UI( uiA ) ) break; + RT_FALL_THROUGH(); /* VBox */ + case softfloat_round_near_maxMag: + if ( exp == 0x3FE ) uiZ |= packToF64UI( 0, 0x3FF, 0 ); + break; + case softfloat_round_min: + if ( uiZ ) uiZ = packToF64UI( 1, 0x3FF, 0 ); + break; + case softfloat_round_max: + if ( !uiZ ) uiZ = packToF64UI( 0, 0x3FF, 0 ); + break; +#ifdef SOFTFLOAT_ROUND_ODD + case softfloat_round_odd: + uiZ |= packToF64UI( 0, 0x3FF, 0 ); + break; +#endif + } + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( 0x433 <= exp ) { + if ( (exp == 0x7FF) && fracF64UI( uiA ) ) { + uiZ = softfloat_propagateNaNF64UI( uiA, 0 SOFTFLOAT_STATE_ARG_COMMA ); + goto uiZ; + } + return a; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uiZ = uiA; + lastBitMask = (uint_fast64_t) 1<<(0x433 - exp); + roundBitsMask = lastBitMask - 1; + if ( roundingMode == softfloat_round_near_maxMag ) { + uiZ += lastBitMask>>1; + } else if ( roundingMode == softfloat_round_near_even ) { + uiZ += lastBitMask>>1; + if ( !(uiZ & roundBitsMask) ) uiZ &= ~lastBitMask; + } else if ( + roundingMode + == (signF64UI( uiZ ) ? softfloat_round_min : softfloat_round_max) + ) { + uiZ += roundBitsMask; + } + uiZ &= ~roundBitsMask; + if ( uiZ != uiA ) { +#ifdef SOFTFLOAT_ROUND_ODD + if ( roundingMode == softfloat_round_odd ) uiZ |= lastBitMask; +#endif + if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact; + } + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + -- cgit v1.2.3