57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
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//////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// This file contains ARM-specific FP code.
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//
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typedef union _FP64Form
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{
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struct
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{
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unsigned int MantLo : 28;
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unsigned int MantHi0 : 4;
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unsigned int MantHi1 : 20;
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unsigned int Exponent : 11;
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unsigned int SignBit : 1;
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};
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struct
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{
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unsigned int ul0;
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unsigned int ul1;
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};
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double fp;
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unsigned __int64 ull;
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} FP64Form, *PFP64Form;
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extern "C"
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double
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__negd(
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double d1
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)
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//++
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//
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//Routine Description:
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//
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// negate the given double precision floating point value
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//
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//Arguments:
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//
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// d1 - double precision values to be negated
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//
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//Return Value:
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//
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// The negation of d1.
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//
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//--
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{
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FP64Form FpConv;
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FpConv.fp = d1;
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FpConv.SignBit ^= 1;
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return( FpConv.fp );
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}
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