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author | 2023-10-10 14:33:42 +0000 | |
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committer | 2023-10-10 14:33:42 +0000 | |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c')
-rw-r--r-- | tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c b/tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c new file mode 100644 index 000000000..25b8f386e --- /dev/null +++ b/tests/fp/berkeley-softfloat-3/source/s_addMagsF64.c @@ -0,0 +1,128 @@ + +/*============================================================================ + +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 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" + +float64_t + softfloat_addMagsF64( uint_fast64_t uiA, uint_fast64_t uiB, bool signZ ) +{ + int_fast16_t expA; + uint_fast64_t sigA; + int_fast16_t expB; + uint_fast64_t sigB; + int_fast16_t expDiff; + uint_fast64_t uiZ; + int_fast16_t expZ; + uint_fast64_t sigZ; + union ui64_f64 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expA = expF64UI( uiA ); + sigA = fracF64UI( uiA ); + expB = expF64UI( uiB ); + sigB = fracF64UI( uiB ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expDiff = expA - expB; + if ( ! expDiff ) { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + if ( ! expA ) { + uiZ = uiA + sigB; + goto uiZ; + } + if ( expA == 0x7FF ) { + if ( sigA | sigB ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + expZ = expA; + sigZ = UINT64_C( 0x0020000000000000 ) + sigA + sigB; + sigZ <<= 9; + } else { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + sigA <<= 9; + sigB <<= 9; + if ( expDiff < 0 ) { + if ( expB == 0x7FF ) { + if ( sigB ) goto propagateNaN; + uiZ = packToF64UI( signZ, 0x7FF, 0 ); + goto uiZ; + } + expZ = expB; + if ( expA ) { + sigA += UINT64_C( 0x2000000000000000 ); + } else { + sigA <<= 1; + } + sigA = softfloat_shiftRightJam64( sigA, -expDiff ); + } else { + if ( expA == 0x7FF ) { + if ( sigA ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + expZ = expA; + if ( expB ) { + sigB += UINT64_C( 0x2000000000000000 ); + } else { + sigB <<= 1; + } + sigB = softfloat_shiftRightJam64( sigB, expDiff ); + } + sigZ = UINT64_C( 0x2000000000000000 ) + sigA + sigB; + if ( sigZ < UINT64_C( 0x4000000000000000 ) ) { + --expZ; + sigZ <<= 1; + } + } + return softfloat_roundPackToF64( signZ, expZ, sigZ ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + propagateNaN: + uiZ = softfloat_propagateNaNF64UI( uiA, uiB ); + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + |