1 files changed, 97 insertions, 0 deletions
diff --git a/source/f128M_eq.c b/source/f128M_eq.c
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+
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
+{
+
+    return f128_eq( *aPtr, *bPtr );
+
+}
+
+#else
+
+bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
+{
+    const uint32_t *aWPtr, *bWPtr;
+    uint32_t wordA, wordB, uiA96, uiB96;
+    bool possibleOppositeZeros;
+    uint32_t mashWord;
+
+    aWPtr = (const uint32_t *) aPtr;
+    bWPtr = (const uint32_t *) bPtr;
+    wordA = aWPtr[indexWord( 4, 2 )];
+    wordB = bWPtr[indexWord( 4, 2 )];
+    if ( wordA != wordB ) goto false_checkSigNaNs;
+    uiA96 = aWPtr[indexWordHi( 4 )];
+    uiB96 = bWPtr[indexWordHi( 4 )];
+    possibleOppositeZeros = false;
+    if ( uiA96 != uiB96 ) {
+        possibleOppositeZeros = (((uiA96 | uiB96) & 0x7FFFFFFF) == 0);
+        if ( ! possibleOppositeZeros ) goto false_checkSigNaNs;
+    }
+    mashWord = wordA | wordB;
+    wordA = aWPtr[indexWord( 4, 1 )];
+    wordB = bWPtr[indexWord( 4, 1 )];
+    if ( wordA != wordB ) goto false_checkSigNaNs;
+    mashWord |= wordA | wordB;
+    wordA = aWPtr[indexWord( 4, 0 )];
+    wordB = bWPtr[indexWord( 4, 0 )];
+    if ( wordA != wordB ) goto false_checkSigNaNs;
+    if ( possibleOppositeZeros && ((mashWord | wordA | wordB) != 0) ) {
+        goto false_checkSigNaNs;
+    }
+    if ( ! softfloat_isNaNF128M( aWPtr ) && ! softfloat_isNaNF128M( bWPtr ) ) {
+        return true;
+    }
+ false_checkSigNaNs:
+    if (
+           f128M_isSignalingNaN( (const float128_t *) aWPtr )
+        || f128M_isSignalingNaN( (const float128_t *) bWPtr )
+    ) {
+        softfloat_raiseFlags( softfloat_flag_invalid );
+    }
+    return false;
+
+}
+
+#endif
+