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-rw-r--r--src/libs/softfloat-3e/source/extF80_div.c203
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diff --git a/src/libs/softfloat-3e/source/extF80_div.c b/src/libs/softfloat-3e/source/extF80_div.c
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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"
+
+extFloat80_t extF80_div( extFloat80_t a, extFloat80_t b SOFTFLOAT_STATE_DECL_COMMA )
+{
+ union { struct extFloat80M s; extFloat80_t f; } uA;
+ uint_fast16_t uiA64;
+ uint_fast64_t uiA0;
+ bool signA;
+ int_fast32_t expA;
+ uint_fast64_t sigA;
+ union { struct extFloat80M s; extFloat80_t f; } uB;
+ uint_fast16_t uiB64;
+ uint_fast64_t uiB0;
+ bool signB;
+ int_fast32_t expB;
+ uint_fast64_t sigB;
+ bool signZ;
+ struct exp32_sig64 normExpSig;
+ int_fast32_t expZ;
+ struct uint128 rem;
+ uint_fast32_t recip32;
+ uint_fast64_t sigZ;
+ int ix;
+ uint_fast64_t q64;
+ uint_fast32_t q;
+ struct uint128 term;
+ uint_fast64_t sigZExtra;
+ struct uint128 uiZ;
+ uint_fast16_t uiZ64;
+ uint_fast64_t uiZ0;
+ union { struct extFloat80M s; extFloat80_t f; } uZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA64 = uA.s.signExp;
+ uiA0 = uA.s.signif;
+ signA = signExtF80UI64( uiA64 );
+ expA = expExtF80UI64( uiA64 );
+ sigA = uiA0;
+ uB.f = b;
+ uiB64 = uB.s.signExp;
+ uiB0 = uB.s.signif;
+ signB = signExtF80UI64( uiB64 );
+ expB = expExtF80UI64( uiB64 );
+ sigB = uiB0;
+ signZ = signA ^ signB;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( expA == 0x7FFF ) {
+ if ( sigA & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+ if ( expB == 0x7FFF ) {
+ if ( sigB & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+ goto invalid;
+ }
+ goto infinity;
+ }
+ if ( expB == 0x7FFF ) {
+ if ( sigB & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+ goto zero;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( ! expB ) expB = 1;
+ if ( ! (sigB & UINT64_C( 0x8000000000000000 )) ) {
+ if ( ! sigB ) {
+ if ( ! sigA ) goto invalid;
+ softfloat_raiseFlags( softfloat_flag_infinite SOFTFLOAT_STATE_ARG_COMMA );
+ goto infinity;
+ }
+ normExpSig = softfloat_normSubnormalExtF80Sig( sigB );
+ expB += normExpSig.exp;
+ sigB = normExpSig.sig;
+ }
+ if ( ! expA ) expA = 1;
+ if ( ! (sigA & UINT64_C( 0x8000000000000000 )) ) {
+ if ( ! sigA ) goto zero;
+ normExpSig = softfloat_normSubnormalExtF80Sig( sigA );
+ expA += normExpSig.exp;
+ sigA = normExpSig.sig;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expZ = expA - expB + 0x3FFF;
+ if ( sigA < sigB ) {
+ --expZ;
+ rem = softfloat_shortShiftLeft128( 0, sigA, 32 );
+ } else {
+ rem = softfloat_shortShiftLeft128( 0, sigA, 31 );
+ }
+ recip32 = softfloat_approxRecip32_1( sigB>>32 );
+ sigZ = 0;
+ ix = 2;
+ for (;;) {
+ q64 = (uint_fast64_t) (uint32_t) (rem.v64>>2) * recip32;
+ q = (q64 + 0x80000000)>>32;
+ --ix;
+ if ( ix < 0 ) break;
+ rem = softfloat_shortShiftLeft128( rem.v64, rem.v0, 29 );
+ term = softfloat_mul64ByShifted32To128( sigB, q );
+ rem = softfloat_sub128( rem.v64, rem.v0, term.v64, term.v0 );
+ if ( rem.v64 & UINT64_C( 0x8000000000000000 ) ) {
+ --q;
+ rem = softfloat_add128( rem.v64, rem.v0, sigB>>32, sigB<<32 );
+ }
+ sigZ = (sigZ<<29) + q;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( ((q + 1) & 0x3FFFFF) < 2 ) {
+ rem = softfloat_shortShiftLeft128( rem.v64, rem.v0, 29 );
+ term = softfloat_mul64ByShifted32To128( sigB, q );
+ rem = softfloat_sub128( rem.v64, rem.v0, term.v64, term.v0 );
+ term = softfloat_shortShiftLeft128( 0, sigB, 32 );
+ if ( rem.v64 & UINT64_C( 0x8000000000000000 ) ) {
+ --q;
+ rem = softfloat_add128( rem.v64, rem.v0, term.v64, term.v0 );
+ } else if ( softfloat_le128( term.v64, term.v0, rem.v64, rem.v0 ) ) {
+ ++q;
+ rem = softfloat_sub128( rem.v64, rem.v0, term.v64, term.v0 );
+ }
+ if ( rem.v64 | rem.v0 ) q |= 1;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ sigZ = (sigZ<<6) + (q>>23);
+ sigZExtra = (uint64_t) ((uint_fast64_t) q<<41);
+ return
+ softfloat_roundPackToExtF80(
+ signZ, expZ, sigZ, sigZExtra, extF80_roundingPrecision SOFTFLOAT_STATE_ARG_COMMA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ propagateNaN:
+ uiZ = softfloat_propagateNaNExtF80UI( uiA64, uiA0, uiB64, uiB0 SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ64 = uiZ.v64;
+ uiZ0 = uiZ.v0;
+ goto uiZ;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ invalid:
+ softfloat_raiseFlags( softfloat_flag_invalid SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ64 = defaultNaNExtF80UI64;
+ uiZ0 = defaultNaNExtF80UI0;
+ goto uiZ;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ infinity:
+ uiZ64 = packToExtF80UI64( signZ, 0x7FFF );
+ uiZ0 = UINT64_C( 0x8000000000000000 );
+ goto uiZ;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ zero:
+ uiZ64 = packToExtF80UI64( signZ, 0 );
+ uiZ0 = 0;
+ uiZ:
+ uZ.s.signExp = uiZ64;
+ uZ.s.signif = uiZ0;
+ return uZ.f;
+
+}
+
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