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85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
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/*============================================================================
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This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
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(Regents). All Rights Reserved. Redistribution and use in source and binary
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forms, with or without modification, are permitted provided that the following
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conditions are met:
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Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer.
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Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer in the
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documentation and/or other materials provided with the distribution. Neither
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the name of the Regents nor the names of its contributors may be used to
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endorse or promote products derived from this software without specific prior
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written permission.
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IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
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OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
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BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
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HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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=============================================================================*/
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#include <stdint.h>
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#include "platform.h"
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#include "internals.h"
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#include "softfloat.h"
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#ifdef SOFTFLOAT_FAST_INT64
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void ui64_to_f128M( uint64_t a, float128_t *zPtr )
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{
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*zPtr = ui64_to_f128( a );
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}
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#else
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void ui64_to_f128M( uint64_t a, float128_t *zPtr )
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{
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uint32_t *zWPtr, uiZ96, uiZ64;
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uint_fast8_t shiftCount;
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uint32_t *ptr;
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zWPtr = (uint32_t *) zPtr;
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uiZ96 = 0;
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uiZ64 = 0;
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zWPtr[indexWord( 4, 1 )] = 0;
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zWPtr[indexWord( 4, 0 )] = 0;
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if ( a ) {
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shiftCount = softfloat_countLeadingZeros64( a ) + 17;
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if ( shiftCount < 32 ) {
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ptr = zWPtr + indexMultiwordHi( 4, 3 );
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ptr[indexWord( 3, 2 )] = 0;
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ptr[indexWord( 3, 1 )] = a>>32;
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ptr[indexWord( 3, 0 )] = a;
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softfloat_shortShiftLeft96M( ptr, shiftCount, ptr );
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ptr[indexWordHi( 3 )] =
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packToF128UI96(
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0, 0x404E - shiftCount, ptr[indexWordHi( 3 )] );
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return;
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}
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a <<= shiftCount - 32;
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uiZ96 = packToF128UI96( 0, 0x404E - shiftCount, a>>32 );
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uiZ64 = a;
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}
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zWPtr[indexWord( 4, 3 )] = uiZ96;
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zWPtr[indexWord( 4, 2 )] = uiZ64;
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}
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#endif
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