Upgrade to SoftFloat 3e

1 files changed, 78 insertions, 0 deletions

diff --git a/softfloat/s_shiftNormSigF128M.c b/softfloat/s_shiftNormSigF128M.c
new file mode 100644
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+++ b/softfloat/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;
+
+}
+