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-rw-r--r--src/libs/softfloat-3e/source/extF80_roundToInt.c158
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diff --git a/src/libs/softfloat-3e/source/extF80_roundToInt.c b/src/libs/softfloat-3e/source/extF80_roundToInt.c
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+++ b/src/libs/softfloat-3e/source/extF80_roundToInt.c
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+
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+#include <iprt/cdefs.h> /* VBox: for RT_FALL_THROUGH */
+
+extFloat80_t
+ extF80_roundToInt( extFloat80_t a, uint_fast8_t roundingMode, bool exact SOFTFLOAT_STATE_DECL_COMMA )
+{
+ union { struct extFloat80M s; extFloat80_t f; } uA;
+ uint_fast16_t uiA64, signUI64;
+ int_fast32_t exp;
+ uint_fast64_t sigA;
+ uint_fast16_t uiZ64;
+ uint_fast64_t sigZ;
+ struct exp32_sig64 normExpSig;
+ struct uint128 uiZ;
+ uint_fast64_t lastBitMask, roundBitsMask;
+ union { struct extFloat80M s; extFloat80_t f; } uZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA64 = uA.s.signExp;
+ signUI64 = uiA64 & packToExtF80UI64( 1, 0 );
+ exp = expExtF80UI64( uiA64 );
+ sigA = uA.s.signif;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( !(sigA & UINT64_C( 0x8000000000000000 )) && (exp != 0x7FFF) ) {
+ if ( !sigA ) {
+ uiZ64 = signUI64;
+ sigZ = 0;
+ goto uiZ;
+ }
+ normExpSig = softfloat_normSubnormalExtF80Sig( sigA );
+ exp += normExpSig.exp;
+ sigA = normExpSig.sig;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( 0x403E <= exp ) {
+ if ( exp == 0x7FFF ) {
+ if ( sigA & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) {
+ uiZ = softfloat_propagateNaNExtF80UI( uiA64, sigA, 0, 0 SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ64 = uiZ.v64;
+ sigZ = uiZ.v0;
+ goto uiZ;
+ }
+ sigZ = UINT64_C( 0x8000000000000000 );
+ } else {
+ sigZ = sigA;
+ }
+ uiZ64 = signUI64 | exp;
+ goto uiZ;
+ }
+ if ( exp <= 0x3FFE ) {
+ if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+ switch ( roundingMode ) {
+ case softfloat_round_near_even:
+ if ( !(sigA & UINT64_C( 0x7FFFFFFFFFFFFFFF )) ) break;
+ RT_FALL_THROUGH(); /* VBox */
+ case softfloat_round_near_maxMag:
+ if ( exp == 0x3FFE ) goto mag1;
+ break;
+ case softfloat_round_min:
+ if ( signUI64 ) goto mag1;
+ break;
+ case softfloat_round_max:
+ if ( !signUI64 ) goto mag1;
+ break;
+#ifdef SOFTFLOAT_ROUND_ODD
+ case softfloat_round_odd:
+ goto mag1;
+#endif
+ }
+ uiZ64 = signUI64;
+ sigZ = 0;
+ goto uiZ;
+ mag1:
+ uiZ64 = signUI64 | 0x3FFF;
+ sigZ = UINT64_C( 0x8000000000000000 );
+ softfloat_exceptionFlags |= softfloat_flag_c1; /* VBox */
+ goto uiZ;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uiZ64 = signUI64 | exp;
+ lastBitMask = (uint_fast64_t) 1<<(0x403E - exp);
+ roundBitsMask = lastBitMask - 1;
+ sigZ = sigA;
+ if ( roundingMode == softfloat_round_near_maxMag ) {
+ sigZ += lastBitMask>>1;
+ } else if ( roundingMode == softfloat_round_near_even ) {
+ sigZ += lastBitMask>>1;
+ if ( !(sigZ & roundBitsMask) ) sigZ &= ~lastBitMask;
+ } else if (
+ roundingMode == (signUI64 ? softfloat_round_min : softfloat_round_max)
+ ) {
+ sigZ += roundBitsMask;
+ }
+ sigZ &= ~roundBitsMask;
+ if ( !sigZ ) {
+ ++uiZ64;
+ sigZ = UINT64_C( 0x8000000000000000 );
+ softfloat_exceptionFlags |= softfloat_flag_c1; /* VBox */
+ } else if ( sigZ > sigA ) softfloat_exceptionFlags |= softfloat_flag_c1; /* VBox */
+ if ( sigZ != sigA ) {
+#ifdef SOFTFLOAT_ROUND_ODD
+ if ( roundingMode == softfloat_round_odd ) sigZ |= lastBitMask;
+#endif
+ if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ uiZ:
+ uZ.s.signExp = uiZ64;
+ uZ.s.signif = sigZ;
+ return uZ.f;
+
+}
+