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[riscv-isa-sim.git] / softfloat / s_shortShiftRightJamM.c

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+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3a, 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 <stdint.h>
+#include "platform.h"
+#include "primitiveTypes.h"
+
+#ifndef softfloat_shortShiftRightJamM
+
+void
+ softfloat_shortShiftRightJamM(
+     uint_fast8_t size_words,
+     const uint32_t *aPtr,
+     uint_fast8_t count,
+     uint32_t *zPtr
+ )
+{
+    uint_fast8_t negCount;
+    unsigned int index, lastIndex;
+    uint32_t partWordZ, wordA;
+
+    negCount = -count;
+    index = indexWordLo( size_words );
+    lastIndex = indexWordHi( size_words );
+    wordA = aPtr[index];
+    partWordZ = wordA>>count;
+    if ( partWordZ<<count != wordA ) partWordZ |= 1;
+    while ( index != lastIndex ) {
+        wordA = aPtr[index + wordIncr];
+        zPtr[index] = wordA<<(negCount & 31) | partWordZ;
+        index += wordIncr;
+        partWordZ = wordA>>count;
+    }
+    zPtr[index] = partWordZ;
+
+}
+
+#endif
+