From 8f59d925353145a65c09301dea6c47da1f1311b1 Mon Sep 17 00:00:00 2001 From: John Hauser Date: Fri, 28 Nov 2014 19:49:28 -0800 Subject: First draft of RC for Release 3, to start review process. --- source/f64_eq.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 source/f64_eq.c (limited to 'source/f64_eq.c') diff --git a/source/f64_eq.c b/source/f64_eq.c new file mode 100644 index 0000000..2fa506d --- /dev/null +++ b/source/f64_eq.c @@ -0,0 +1,63 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014 The Regents of the University of California +(Regents). All Rights Reserved. Redistribution and use in source and binary +forms, with or without modification, are permitted provided that the following +conditions are met: + +Redistributions of source code must retain the above copyright notice, +this list of conditions, and the following two paragraphs of disclaimer. +Redistributions in binary form must reproduce the above copyright notice, +this list of conditions, and the following two paragraphs of disclaimer in the +documentation and/or other materials provided with the distribution. Neither +the name of the Regents nor the names of its contributors may be used to +endorse or promote products derived from this software without specific prior +written permission. + +IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, +SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING +OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS +BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED +TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED +HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE +MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + +=============================================================================*/ + +#include +#include +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" + +bool f64_eq( float64_t a, float64_t b ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + union ui64_f64 uB; + uint_fast64_t uiB; + + uA.f = a; + uiA = uA.ui; + uB.f = b; + uiB = uB.ui; + if ( isNaNF64UI( uiA ) || isNaNF64UI( uiB ) ) { + if ( + softfloat_isSigNaNF64UI( uiA ) || softfloat_isSigNaNF64UI( uiB ) + ) { + softfloat_raiseFlags( softfloat_flag_invalid ); + } + return false; + } + return (uiA == uiB) || ! ((uiA | uiB) & UINT64_C( 0x7FFFFFFFFFFFFFFF )); + +} + -- cgit v1.1