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author | John Hauser <jhauser@eecs.berkeley.edu> | 2014-11-28 19:49:28 -0800 |
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committer | John Hauser <jhauser@eecs.berkeley.edu> | 2014-11-28 19:49:28 -0800 |
commit | 8f59d925353145a65c09301dea6c47da1f1311b1 (patch) | |
tree | c55a81490cc411be6c812a5bfcc8fdc48296def9 /source/ui64_to_f128M.c | |
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First draft of RC for Release 3, to start review process.
Diffstat (limited to 'source/ui64_to_f128M.c')
-rw-r--r-- | source/ui64_to_f128M.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/source/ui64_to_f128M.c b/source/ui64_to_f128M.c new file mode 100644 index 0000000..c1c9702 --- /dev/null +++ b/source/ui64_to_f128M.c @@ -0,0 +1,84 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014 The Regents of the University of California +(Regents). All Rights Reserved. Redistribution and use in source and binary +forms, with or without modification, are permitted provided that the following +conditions are met: + +Redistributions of source code must retain the above copyright notice, +this list of conditions, and the following two paragraphs of disclaimer. +Redistributions in binary form must reproduce the above copyright notice, +this list of conditions, and the following two paragraphs of disclaimer in the +documentation and/or other materials provided with the distribution. Neither +the name of the Regents nor the names of its contributors may be used to +endorse or promote products derived from this software without specific prior +written permission. + +IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, +SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING +OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS +BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED +TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED +HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE +MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + +=============================================================================*/ + +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "softfloat.h" + +#ifdef SOFTFLOAT_FAST_INT64 + +void ui64_to_f128M( uint64_t a, float128_t *zPtr ) +{ + + *zPtr = ui64_to_f128( a ); + +} + +#else + +void ui64_to_f128M( uint64_t a, float128_t *zPtr ) +{ + uint32_t *zWPtr, uiZ96, uiZ64; + uint_fast8_t shiftCount; + uint32_t *ptr; + + zWPtr = (uint32_t *) zPtr; + uiZ96 = 0; + uiZ64 = 0; + zWPtr[indexWord( 4, 1 )] = 0; + zWPtr[indexWord( 4, 0 )] = 0; + if ( a ) { + shiftCount = softfloat_countLeadingZeros64( a ) + 17; + if ( shiftCount < 32 ) { + ptr = zWPtr + indexMultiwordHi( 4, 3 ); + ptr[indexWord( 3, 2 )] = 0; + ptr[indexWord( 3, 1 )] = a>>32; + ptr[indexWord( 3, 0 )] = a; + softfloat_shortShiftLeft96M( ptr, shiftCount, ptr ); + ptr[indexWordHi( 3 )] = + packToF128UI96( + 0, 0x404E - shiftCount, ptr[indexWordHi( 3 )] ); + return; + } + a <<= shiftCount - 32; + uiZ96 = packToF128UI96( 0, 0x404E - shiftCount, a>>32 ); + uiZ64 = a; + } + zWPtr[indexWord( 4, 3 )] = uiZ96; + zWPtr[indexWord( 4, 2 )] = uiZ64; + +} + +#endif + |