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+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3a, 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"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+void
+ f128M_mul( const float128_t *aPtr, const float128_t *bPtr, float128_t *zPtr )
+{
+
+ *zPtr = f128_mul( *aPtr, *bPtr );
+
+}
+
+#else
+
+void
+ f128M_mul( const float128_t *aPtr, const float128_t *bPtr, float128_t *zPtr )
+{
+ const uint32_t *aWPtr, *bWPtr;
+ uint32_t *zWPtr;
+ uint32_t uiA96;
+ int32_t expA;
+ uint32_t uiB96;
+ int32_t expB;
+ bool signZ;
+ const uint32_t *ptr;
+ uint32_t uiZ96, sigA[4];
+ uint_fast8_t shiftCount;
+ uint32_t sigB[4];
+ int32_t expZ;
+ uint32_t sigProd[8], *extSigZPtr;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ aWPtr = (const uint32_t *) aPtr;
+ bWPtr = (const uint32_t *) bPtr;
+ zWPtr = (uint32_t *) zPtr;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uiA96 = aWPtr[indexWordHi( 4 )];
+ expA = expF128UI96( uiA96 );
+ uiB96 = bWPtr[indexWordHi( 4 )];
+ expB = expF128UI96( uiB96 );
+ signZ = signF128UI96( uiA96 ) ^ signF128UI96( uiB96 );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( (expA == 0x7FFF) || (expB == 0x7FFF) ) {
+ if ( softfloat_tryPropagateNaNF128M( aWPtr, bWPtr, zWPtr ) ) return;
+ ptr = aWPtr;
+ if ( ! expA ) goto possiblyInvalid;
+ if ( ! expB ) {
+ ptr = bWPtr;
+ possiblyInvalid:
+ if (
+ ! fracF128UI96( ptr[indexWordHi( 4 )] )
+ && ! (ptr[indexWord( 4, 2 )] | ptr[indexWord( 4, 1 )]
+ | ptr[indexWord( 4, 0 )])
+ ) {
+ softfloat_invalidF128M( zWPtr );
+ return;
+ }
+ }
+ uiZ96 = packToF128UI96( signZ, 0x7FFF, 0 );
+ goto uiZ96;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( expA ) {
+ sigA[indexWordHi( 4 )] = fracF128UI96( uiA96 ) | 0x00010000;
+ sigA[indexWord( 4, 2 )] = aWPtr[indexWord( 4, 2 )];
+ sigA[indexWord( 4, 1 )] = aWPtr[indexWord( 4, 1 )];
+ sigA[indexWord( 4, 0 )] = aWPtr[indexWord( 4, 0 )];
+ } else {
+ expA = softfloat_shiftNormSigF128M( aWPtr, 0, sigA );
+ if ( expA == -128 ) goto zero;
+ }
+ if ( expB ) {
+ sigB[indexWordHi( 4 )] = fracF128UI96( uiB96 ) | 0x00010000;
+ sigB[indexWord( 4, 2 )] = bWPtr[indexWord( 4, 2 )];
+ sigB[indexWord( 4, 1 )] = bWPtr[indexWord( 4, 1 )];
+ sigB[indexWord( 4, 0 )] = bWPtr[indexWord( 4, 0 )];
+ } else {
+ expB = softfloat_shiftNormSigF128M( bWPtr, 0, sigB );
+ if ( expB == -128 ) goto zero;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expZ = expA + expB - 0x4000;
+ softfloat_mul128MTo256M( sigA, sigB, sigProd );
+ if (
+ sigProd[indexWord( 8, 2 )]
+ || (sigProd[indexWord( 8, 1 )] | sigProd[indexWord( 8, 0 )])
+ ) {
+ sigProd[indexWord( 8, 3 )] |= 1;
+ }
+ extSigZPtr = &sigProd[indexMultiwordHi( 8, 5 )];
+ shiftCount = 16;
+ if ( extSigZPtr[indexWordHi( 5 )] & 2 ) {
+ ++expZ;
+ shiftCount = 15;
+ }
+ softfloat_shortShiftLeft160M( extSigZPtr, shiftCount, extSigZPtr );
+ softfloat_roundPackMToF128M( signZ, expZ, extSigZPtr, zWPtr );
+ return;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ zero:
+ uiZ96 = packToF128UI96( signZ, 0, 0 );
+ uiZ96:
+ zWPtr[indexWordHi( 4 )] = uiZ96;
+ zWPtr[indexWord( 4, 2 )] = 0;
+ zWPtr[indexWord( 4, 1 )] = 0;
+ zWPtr[indexWord( 4, 0 )] = 0;
+
+}
+
+#endif
+