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Diffstat (limited to 'softfloat/extF80_eq.c')
-rw-r--r-- | softfloat/extF80_eq.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/softfloat/extF80_eq.c b/softfloat/extF80_eq.c new file mode 100644 index 0000000..60f29da --- /dev/null +++ b/softfloat/extF80_eq.c @@ -0,0 +1,73 @@ + +/*============================================================================ + +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 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" + +bool extF80_eq( extFloat80_t a, extFloat80_t b ) +{ + union { struct extFloat80M s; extFloat80_t f; } uA; + uint_fast16_t uiA64; + uint_fast64_t uiA0; + union { struct extFloat80M s; extFloat80_t f; } uB; + uint_fast16_t uiB64; + uint_fast64_t uiB0; + + uA.f = a; + uiA64 = uA.s.signExp; + uiA0 = uA.s.signif; + uB.f = b; + uiB64 = uB.s.signExp; + uiB0 = uB.s.signif; + if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) { + if ( + softfloat_isSigNaNExtF80UI( uiA64, uiA0 ) + || softfloat_isSigNaNExtF80UI( uiB64, uiB0 ) + ) { + softfloat_raiseFlags( softfloat_flag_invalid ); + } + return false; + } + return + (uiA0 == uiB0) + && ((uiA64 == uiB64) || (! uiA0 && ! ((uiA64 | uiB64) & 0x7FFF))); + +} + |