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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
commit16f504a9dca3fe3b70568f67b7d41241ae485288 (patch)
treec60f36ada0496ba928b7161059ba5ab1ab224f9d /src/libs/softfloat-3e/source/s_shiftNormSigF128M.c
parentInitial commit. (diff)
downloadvirtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.tar.xz
virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.zip
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/softfloat-3e/source/s_shiftNormSigF128M.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, 2015, 2016 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 <stdint.h>
+#include "platform.h"
+#include "internals.h"
+
+int
+ softfloat_shiftNormSigF128M(
+ const uint32_t *wPtr, uint_fast8_t shiftDist, uint32_t *sigPtr )
+{
+ uint32_t wordSig;
+ int32_t exp;
+ uint32_t leadingBit;
+
+ wordSig = wPtr[indexWordHi( 4 )];
+ exp = expF128UI96( wordSig );
+ if ( exp ) {
+ softfloat_shortShiftLeft128M( wPtr, shiftDist, sigPtr );
+ leadingBit = 0x00010000<<shiftDist;
+ sigPtr[indexWordHi( 4 )] =
+ (sigPtr[indexWordHi( 4 )] & (leadingBit - 1)) | leadingBit;
+ } else {
+ exp = 16;
+ wordSig &= 0x7FFFFFFF;
+ if ( ! wordSig ) {
+ exp = -16;
+ wordSig = wPtr[indexWord( 4, 2 )];
+ if ( ! wordSig ) {
+ exp = -48;
+ wordSig = wPtr[indexWord( 4, 1 )];
+ if ( ! wordSig ) {
+ wordSig = wPtr[indexWord( 4, 0 )];
+ if ( ! wordSig ) return -128;
+ exp = -80;
+ }
+ }
+ }
+ exp -= softfloat_countLeadingZeros32( wordSig );
+ softfloat_shiftLeft128M( wPtr, 1 - exp + shiftDist, sigPtr );
+ }
+ return exp;
+
+}
+