diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/libs/softfloat-3e/source/s_roundMToUI64.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/softfloat-3e/source/s_roundMToUI64.c')
-rw-r--r-- | src/libs/softfloat-3e/source/s_roundMToUI64.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_roundMToUI64.c b/src/libs/softfloat-3e/source/s_roundMToUI64.c new file mode 100644 index 00000000..20d434cd --- /dev/null +++ b/src/libs/softfloat-3e/source/s_roundMToUI64.c @@ -0,0 +1,98 @@ + +/*============================================================================ + +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, 2015, 2016, 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" + +uint_fast64_t + softfloat_roundMToUI64( + bool sign, uint32_t *extSigPtr, uint_fast8_t roundingMode, bool exact SOFTFLOAT_STATE_DECL_COMMA) +{ + uint64_t sig; + uint32_t sigExtra; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + sig = + (uint64_t) extSigPtr[indexWord( 3, 2 )]<<32 + | extSigPtr[indexWord( 3, 1 )]; + sigExtra = extSigPtr[indexWordLo( 3 )]; + if ( + (roundingMode == softfloat_round_near_maxMag) + || (roundingMode == softfloat_round_near_even) + ) { + if ( 0x80000000 <= sigExtra ) goto increment; + } else { + if ( sign ) { + if ( !(sig | sigExtra) ) return 0; + if ( roundingMode == softfloat_round_min ) goto invalid; +#ifdef SOFTFLOAT_ROUND_ODD + if ( roundingMode == softfloat_round_odd ) goto invalid; +#endif + } else { + if ( (roundingMode == softfloat_round_max) && sigExtra ) { + increment: + ++sig; + if ( !sig ) goto invalid; + if ( + (sigExtra == 0x80000000) + && (roundingMode == softfloat_round_near_even) + ) { + sig &= ~(uint_fast64_t) 1; + } + } + } + } + if ( sign && sig ) goto invalid; + if ( sigExtra ) { +#ifdef SOFTFLOAT_ROUND_ODD + if ( roundingMode == softfloat_round_odd ) sig |= 1; +#endif + if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return sig; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + invalid: + softfloat_raiseFlags( softfloat_flag_invalid SOFTFLOAT_STATE_ARG_COMMA ); + return sign ? ui64_fromNegOverflow : ui64_fromPosOverflow; + +} + |