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author | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-03-01 16:24:05 -0800 |
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committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-03-01 16:24:44 -0800 |
commit | a95b44df9d142a49f3e1bfe4a60d259ed41ca247 (patch) | |
tree | 49f59c903609e5b0de05d5b0c7f7bd23de8c4f13 /softfloat/ui32_to_f64.c | |
parent | bea283531abfd013811e83c75ff6189a0d9b3075 (diff) | |
download | spike-a95b44df9d142a49f3e1bfe4a60d259ed41ca247.zip spike-a95b44df9d142a49f3e1bfe4a60d259ed41ca247.tar.gz spike-a95b44df9d142a49f3e1bfe4a60d259ed41ca247.tar.bz2 |
Upgrade to latest SoftFloat
Diffstat (limited to 'softfloat/ui32_to_f64.c')
-rw-r--r--[-rwxr-xr-x] | softfloat/ui32_to_f64.c | 86 |
1 files changed, 60 insertions, 26 deletions
diff --git a/softfloat/ui32_to_f64.c b/softfloat/ui32_to_f64.c index d0bd177..6b72fa5 100755..100644 --- a/softfloat/ui32_to_f64.c +++ b/softfloat/ui32_to_f64.c @@ -1,26 +1,60 @@ -
-#include <stdint.h>
-#include "platform.h"
-#include "primitives.h"
-#include "internals.h"
-#include "softfloat.h"
-
-float64_t ui32_to_f64( uint_fast32_t a )
-{
- uint_fast64_t uiZ;
- int shiftCount;
- union ui64_f64 uZ;
-
- if ( ! a ) {
- uiZ = 0;
- } else {
- shiftCount = softfloat_countLeadingZeros32( a ) + 21;
- uiZ =
- packToF64UI(
- 0, 0x432 - shiftCount, (uint_fast64_t) a<<shiftCount );
- }
- uZ.ui = uiZ;
- return uZ.f;
-
-}
-
+ +/*============================================================================ + +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 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" +#include "softfloat.h" + +float64_t ui32_to_f64( uint32_t a ) +{ + uint_fast64_t uiZ; + int_fast8_t shiftCount; + union ui64_f64 uZ; + + if ( ! a ) { + uiZ = 0; + } else { + shiftCount = softfloat_countLeadingZeros32( a ) + 21; + uiZ = + packToF64UI( + 0, 0x432 - shiftCount, (uint_fast64_t) a<<shiftCount ); + } + uZ.ui = uiZ; + return uZ.f; + +} + |