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+
+/*============================================================================
+
+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"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+void
+ f128M_rem( const float128_t *aPtr, const float128_t *bPtr, float128_t *zPtr )
+{
+
+ *zPtr = f128_rem( *aPtr, *bPtr );
+
+}
+
+#else
+
+void
+ f128M_rem( const float128_t *aPtr, const float128_t *bPtr, float128_t *zPtr )
+{
+ const uint32_t *aWPtr, *bWPtr;
+ uint32_t *zWPtr, uiA96;
+ int32_t expA, expB;
+ uint32_t x[4], rem1[5], *remPtr;
+ bool signRem;
+ int32_t expDiff;
+ uint32_t q, recip32;
+ uint64_t q64;
+ uint32_t rem2[5], *altRemPtr, *newRemPtr, wordMeanRem;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ aWPtr = (const uint32_t *) aPtr;
+ bWPtr = (const uint32_t *) bPtr;
+ zWPtr = (uint32_t *) zPtr;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uiA96 = aWPtr[indexWordHi( 4 )];
+ expA = expF128UI96( uiA96 );
+ expB = expF128UI96( bWPtr[indexWordHi( 4 )] );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( (expA == 0x7FFF) || (expB == 0x7FFF) ) {
+ if ( softfloat_tryPropagateNaNF128M( aWPtr, bWPtr, zWPtr ) ) return;
+ if ( expA == 0x7FFF ) goto invalid;
+ goto copyA;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( expA < expB - 1 ) goto copyA;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expB = softfloat_shiftNormSigF128M( bWPtr, 13, x );
+ if ( expB == -128 ) goto invalid;
+ remPtr = &rem1[indexMultiwordLo( 5, 4 )];
+ expA = softfloat_shiftNormSigF128M( aWPtr, 13, remPtr );
+ if ( expA == -128 ) goto copyA;
+ signRem = signF128UI96( uiA96 );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expDiff = expA - expB;
+ if ( expDiff < 1 ) {
+ if ( expDiff < -1 ) goto copyA;
+ if ( expDiff ) {
+ --expB;
+ softfloat_add128M( x, x, x );
+ q = 0;
+ } else {
+ q = (softfloat_compare128M( x, remPtr ) <= 0);
+ if ( q ) softfloat_sub128M( remPtr, x, remPtr );
+ }
+ } else {
+ recip32 =
+ softfloat_approxRecip32_1(
+ ((uint64_t) x[indexWord( 4, 3 )]<<32 | x[indexWord( 4, 2 )])
+ >>30
+ );
+ expDiff -= 30;
+ for (;;) {
+ q64 = (uint64_t) remPtr[indexWordHi( 4 )] * recip32;
+ if ( expDiff < 0 ) break;
+ q = (q64 + 0x80000000)>>32;
+ softfloat_remStep128MBy32( remPtr, 29, x, q, remPtr );
+ if ( remPtr[indexWordHi( 4 )] & 0x80000000 ) {
+ softfloat_add128M( remPtr, x, remPtr );
+ }
+ expDiff -= 29;
+ }
+ /*--------------------------------------------------------------------
+ | (`expDiff' cannot be less than -29 here.)
+ *--------------------------------------------------------------------*/
+ q = (uint32_t) (q64>>32)>>(~expDiff & 31);
+ softfloat_remStep128MBy32( remPtr, expDiff + 30, x, q, remPtr );
+ if ( remPtr[indexWordHi( 4 )] & 0x80000000 ) {
+ altRemPtr = &rem2[indexMultiwordLo( 5, 4 )];
+ softfloat_add128M( remPtr, x, altRemPtr );
+ goto selectRem;
+ }
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ altRemPtr = &rem2[indexMultiwordLo( 5, 4 )];
+ do {
+ ++q;
+ newRemPtr = altRemPtr;
+ softfloat_sub128M( remPtr, x, newRemPtr );
+ altRemPtr = remPtr;
+ remPtr = newRemPtr;
+ } while ( ! (remPtr[indexWordHi( 4 )] & 0x80000000) );
+ selectRem:
+ softfloat_add128M( remPtr, altRemPtr, x );
+ wordMeanRem = x[indexWordHi( 4 )];
+ if (
+ (wordMeanRem & 0x80000000)
+ || (! wordMeanRem && (q & 1) && ! x[indexWord( 4, 0 )]
+ && ! (x[indexWord( 4, 2 )] | x[indexWord( 4, 1 )]))
+ ) {
+ remPtr = altRemPtr;
+ }
+ if ( remPtr[indexWordHi( 4 )] & 0x80000000 ) {
+ signRem = ! signRem;
+ softfloat_negX128M( remPtr );
+ }
+ remPtr -= indexMultiwordLo( 5, 4 );
+ remPtr[indexWordHi( 5 )] = 0;
+ softfloat_normRoundPackMToF128M( signRem, expB + 18, remPtr, zWPtr );
+ return;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ invalid:
+ softfloat_invalidF128M( zWPtr );
+ return;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ copyA:
+ zWPtr[indexWordHi( 4 )] = uiA96;
+ zWPtr[indexWord( 4, 2 )] = aWPtr[indexWord( 4, 2 )];
+ zWPtr[indexWord( 4, 1 )] = aWPtr[indexWord( 4, 1 )];
+ zWPtr[indexWord( 4, 0 )] = aWPtr[indexWord( 4, 0 )];
+
+}
+
+#endif
+