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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/libs/softfloat-3e/source/s_addMagsF128.c
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/softfloat-3e/source/s_addMagsF128.c')
-rw-r--r--src/libs/softfloat-3e/source/s_addMagsF128.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_addMagsF128.c b/src/libs/softfloat-3e/source/s_addMagsF128.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"
+
+float128_t
+ softfloat_addMagsF128(
+ uint_fast64_t uiA64,
+ uint_fast64_t uiA0,
+ uint_fast64_t uiB64,
+ uint_fast64_t uiB0,
+ bool signZ
+ SOFTFLOAT_STATE_DECL_COMMA
+ )
+{
+ int_fast32_t expA;
+ struct uint128 sigA;
+ int_fast32_t expB;
+ struct uint128 sigB;
+ int_fast32_t expDiff;
+ struct uint128 uiZ, sigZ;
+ int_fast32_t expZ;
+ uint_fast64_t sigZExtra;
+ struct uint128_extra sig128Extra;
+ union ui128_f128 uZ;
+
+ expA = expF128UI64( uiA64 );
+ sigA.v64 = fracF128UI64( uiA64 );
+ sigA.v0 = uiA0;
+ expB = expF128UI64( uiB64 );
+ sigB.v64 = fracF128UI64( uiB64 );
+ sigB.v0 = uiB0;
+ expDiff = expA - expB;
+ if ( ! expDiff ) {
+ if ( expA == 0x7FFF ) {
+ if ( sigA.v64 | sigA.v0 | sigB.v64 | sigB.v0 ) goto propagateNaN;
+ uiZ.v64 = uiA64;
+ uiZ.v0 = uiA0;
+ goto uiZ;
+ }
+ sigZ = softfloat_add128( sigA.v64, sigA.v0, sigB.v64, sigB.v0 );
+ if ( ! expA ) {
+ uiZ.v64 = packToF128UI64( signZ, 0, sigZ.v64 );
+ uiZ.v0 = sigZ.v0;
+ goto uiZ;
+ }
+ expZ = expA;
+ sigZ.v64 |= UINT64_C( 0x0002000000000000 );
+ sigZExtra = 0;
+ goto shiftRight1;
+ }
+ if ( expDiff < 0 ) {
+ if ( expB == 0x7FFF ) {
+ if ( sigB.v64 | sigB.v0 ) goto propagateNaN;
+ uiZ.v64 = packToF128UI64( signZ, 0x7FFF, 0 );
+ uiZ.v0 = 0;
+ goto uiZ;
+ }
+ expZ = expB;
+ if ( expA ) {
+ sigA.v64 |= UINT64_C( 0x0001000000000000 );
+ } else {
+ ++expDiff;
+ sigZExtra = 0;
+ if ( ! expDiff ) goto newlyAligned;
+ }
+ sig128Extra =
+ softfloat_shiftRightJam128Extra( sigA.v64, sigA.v0, 0, -expDiff );
+ sigA = sig128Extra.v;
+ sigZExtra = sig128Extra.extra;
+ } else {
+ if ( expA == 0x7FFF ) {
+ if ( sigA.v64 | sigA.v0 ) goto propagateNaN;
+ uiZ.v64 = uiA64;
+ uiZ.v0 = uiA0;
+ goto uiZ;
+ }
+ expZ = expA;
+ if ( expB ) {
+ sigB.v64 |= UINT64_C( 0x0001000000000000 );
+ } else {
+ --expDiff;
+ sigZExtra = 0;
+ if ( ! expDiff ) goto newlyAligned;
+ }
+ sig128Extra =
+ softfloat_shiftRightJam128Extra( sigB.v64, sigB.v0, 0, expDiff );
+ sigB = sig128Extra.v;
+ sigZExtra = sig128Extra.extra;
+ }
+ newlyAligned:
+ sigZ =
+ softfloat_add128(
+ sigA.v64 | UINT64_C( 0x0001000000000000 ),
+ sigA.v0,
+ sigB.v64,
+ sigB.v0
+ );
+ --expZ;
+ if ( sigZ.v64 < UINT64_C( 0x0002000000000000 ) ) goto roundAndPack;
+ ++expZ;
+ shiftRight1:
+ sig128Extra =
+ softfloat_shortShiftRightJam128Extra(
+ sigZ.v64, sigZ.v0, sigZExtra, 1 );
+ sigZ = sig128Extra.v;
+ sigZExtra = sig128Extra.extra;
+ roundAndPack:
+ return
+ softfloat_roundPackToF128( signZ, expZ, sigZ.v64, sigZ.v0, sigZExtra SOFTFLOAT_STATE_ARG_COMMA );
+ propagateNaN:
+ uiZ = softfloat_propagateNaNF128UI( uiA64, uiA0, uiB64, uiB0 SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ:
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+