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-rw-r--r--src/libs/softfloat-3e/source/s_subMagsExtF80.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_subMagsExtF80.c b/src/libs/softfloat-3e/source/s_subMagsExtF80.c
new file mode 100644
index 00000000..22a8269b
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+++ b/src/libs/softfloat-3e/source/s_subMagsExtF80.c
@@ -0,0 +1,159 @@
+
+/*============================================================================
+
+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, 2015 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
+ softfloat_subMagsExtF80(
+ uint_fast16_t uiA64,
+ uint_fast64_t uiA0,
+ uint_fast16_t uiB64,
+ uint_fast64_t uiB0,
+ bool signZ
+ SOFTFLOAT_STATE_DECL_COMMA
+ )
+{
+ int_fast32_t expA;
+ uint_fast64_t sigA;
+ int_fast32_t expB;
+ uint_fast64_t sigB;
+ int_fast32_t expDiff;
+ uint_fast16_t uiZ64;
+ uint_fast64_t uiZ0;
+ int_fast32_t expZ;
+ uint_fast64_t sigExtra;
+ struct uint128 sig128, uiZ;
+ union { struct extFloat80M s; extFloat80_t f; } uZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expA = expExtF80UI64( uiA64 );
+ sigA = uiA0;
+ expB = expExtF80UI64( uiB64 );
+ sigB = uiB0;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expDiff = expA - expB;
+ if ( 0 < expDiff ) goto expABigger;
+ if ( expDiff < 0 ) goto expBBigger;
+ if ( expA == 0x7FFF ) {
+ if ( (sigA | sigB) & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) {
+ goto propagateNaN;
+ }
+ softfloat_raiseFlags( softfloat_flag_invalid SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ64 = defaultNaNExtF80UI64;
+ uiZ0 = defaultNaNExtF80UI0;
+ goto uiZ;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expZ = expA;
+ if ( ! expZ ) expZ = 1;
+ sigExtra = 0;
+ if ( sigB < sigA ) goto aBigger;
+ if ( sigA < sigB ) goto bBigger;
+ uiZ64 =
+ packToExtF80UI64( (softfloat_roundingMode == softfloat_round_min), 0 );
+ uiZ0 = 0;
+ goto uiZ;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expBBigger:
+ if ( expB == 0x7FFF ) {
+ if ( sigB & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+ uiZ64 = packToExtF80UI64( signZ ^ 1, 0x7FFF );
+ uiZ0 = UINT64_C( 0x8000000000000000 );
+ goto uiZ;
+ }
+ if ( ! expA ) {
+ ++expDiff;
+ sigExtra = 0;
+ if ( ! expDiff ) goto newlyAlignedBBigger;
+ }
+ sig128 = softfloat_shiftRightJam128( sigA, 0, -expDiff );
+ sigA = sig128.v64;
+ sigExtra = sig128.v0;
+ newlyAlignedBBigger:
+ expZ = expB;
+ bBigger:
+ signZ = ! signZ;
+ sig128 = softfloat_sub128( sigB, 0, sigA, sigExtra );
+ goto normRoundPack;
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expABigger:
+ if ( expA == 0x7FFF ) {
+ if ( sigA & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+ uiZ64 = uiA64;
+ uiZ0 = uiA0;
+ goto uiZ;
+ }
+ if ( ! expB ) {
+ --expDiff;
+ sigExtra = 0;
+ if ( ! expDiff ) goto newlyAlignedABigger;
+ }
+ sig128 = softfloat_shiftRightJam128( sigB, 0, expDiff );
+ sigB = sig128.v64;
+ sigExtra = sig128.v0;
+ newlyAlignedABigger:
+ expZ = expA;
+ aBigger:
+ sig128 = softfloat_sub128( sigA, 0, sigB, sigExtra );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ normRoundPack:
+ return
+ softfloat_normRoundPackToExtF80(
+ signZ, expZ, sig128.v64, sig128.v0, extF80_roundingPrecision SOFTFLOAT_STATE_ARG_COMMA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ propagateNaN:
+ uiZ = softfloat_propagateNaNExtF80UI( uiA64, uiA0, uiB64, uiB0 SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ64 = uiZ.v64;
+ uiZ0 = uiZ.v0;
+ uiZ:
+ uZ.s.signExp = uiZ64;
+ uZ.s.signif = uiZ0;
+ return uZ.f;
+
+}
+