+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3a+, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014, 2015, 2016 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"
uint_fast32_t
softfloat_roundPackToUI32(
- bool sign, uint_fast64_t sig, int_fast8_t roundingMode, bool exact )
+ bool sign, uint_fast64_t sig, uint_fast8_t roundingMode, bool exact )
{
- bool roundNearestEven;
- int roundIncrement, roundBits;
+ bool roundNearEven;
+ uint_fast8_t roundIncrement, roundBits;
uint_fast32_t z;
- roundNearestEven = ( roundingMode == softfloat_round_nearest_even );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ roundNearEven = (roundingMode == softfloat_round_near_even);
roundIncrement = 0x40;
- if (
- ! roundNearestEven
- && ( roundingMode != softfloat_round_nearest_maxMag )
- ) {
+ if ( ! roundNearEven && (roundingMode != softfloat_round_near_maxMag) ) {
roundIncrement =
- ( roundingMode == softfloat_round_minMag )
- || ( roundingMode
- == ( sign ? softfloat_round_max : softfloat_round_min ) )
- ? 0
- : 0x7F;
+ (roundingMode
+ == (sign ? softfloat_round_min : softfloat_round_max))
+ ? 0x7F
+ : 0;
}
roundBits = sig & 0x7F;
sig += roundIncrement;
if ( sig & UINT64_C( 0xFFFFFF8000000000 ) ) goto invalid;
z = sig>>7;
- z &= ~ ( ! ( roundBits ^ 0x40 ) & roundNearestEven );
+ z &= ~(uint_fast32_t) (! (roundBits ^ 0x40) & roundNearEven);
if ( sign && z ) goto invalid;
if ( exact && roundBits ) {
softfloat_exceptionFlags |= softfloat_flag_inexact;
}
return z;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
invalid:
softfloat_raiseFlags( softfloat_flag_invalid );
- return 0xFFFFFFFF;
+ return sign ? ui32_fromNegOverflow : ui32_fromPosOverflow;
}