461520d0ab
* Add all softfloat source files without any change.
* Remove useless file softfloat.mk.in, since gem5 use Scons.
* Add `use_fast_int64` in SConscript to distinguish src of two strategies for data
larger than 64 bits.
* The SoftFloat library uses two strategies to handle data larger than 64bit. One is
spliting data into `fast_int64`, and the other is using pointer. Two strategies
are distinguished by macro `SOFTFLOAT_FAST_INT64`. But not all "*.c" files are
guarded by this macro, which leads to including useless files in compiling progress
and compiling error. `use_fast_int64` used in SConscript can exclude unnecessary
files.
Change-Id: I7cec10412c00a35c247299cd92d83cdee9066410
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66552
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
82 lines
4.4 KiB
C
82 lines
4.4 KiB
C
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/*============================================================================
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This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3d, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014, 2015, 2016 The Regents of the University of
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California. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "internals.h"
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#include "specialize.h"
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#include "softfloat.h"
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#define COMPARE_MAX(a, b, bits) \
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float ## bits ## _t f ## bits ## _max( float ## bits ## _t a, float ## bits ## _t b ) \
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{ \
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bool greater = f ## bits ## _lt_quiet(b, a) || \
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(f ## bits ## _eq(b, a) && signF ## bits ## UI(b.v)); \
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\
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if (isNaNF ## bits ## UI(a.v) && isNaNF ## bits ## UI(b.v)) { \
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union ui ## bits ## _f ## bits ui; \
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ui.ui = defaultNaNF ## bits ## UI; \
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return ui.f; \
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} else { \
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return greater || isNaNF ## bits ## UI((b).v) ? a : b; \
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} \
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}
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#define COMPARE_MIN(a, b, bits) \
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float ## bits ## _t f ## bits ## _min( float ## bits ## _t a, float ## bits ## _t b ) \
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{ \
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bool less = f ## bits ## _lt_quiet(a, b) || \
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(f ## bits ## _eq(a, b) && signF ## bits ## UI(a.v)); \
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\
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if (isNaNF ## bits ## UI(a.v) && isNaNF ## bits ## UI(b.v)) { \
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union ui ## bits ## _f ## bits ui; \
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ui.ui = defaultNaNF ## bits ## UI; \
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return ui.f; \
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} else { \
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return less || isNaNF ## bits ## UI((b).v) ? a : b; \
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} \
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}
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COMPARE_MAX(a, b, 16);
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COMPARE_MAX(a, b, 32);
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COMPARE_MAX(a, b, 64);
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COMPARE_MIN(a, b, 16);
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COMPARE_MIN(a, b, 32);
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COMPARE_MIN(a, b, 64);
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