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Added accessors to extract sign/exponent/significand BV numerals from FP numerals.

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This commit is contained in:
Christoph M. Wintersteiger 2016-09-16 16:48:22 +01:00
parent 5716eaafed
commit 6b474adc8a
7 changed files with 246 additions and 5 deletions
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52
src/api/dotnet/FPNum.cs
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@ -14,7 +14,7 @@ Author:
Christoph Wintersteiger (cwinter) 2013-06-10
Notes:
--*/
using System;
using System.Diagnostics.Contracts;
@ -27,6 +27,48 @@ namespace Microsoft.Z3
[ContractVerification(true)]
public class FPNum : FPExpr
{
/// <summary>
/// The sign of a floating-point numeral as a bit-vector expression
/// </summary>
/// <remarks>
/// NaN's do not have a bit-vector sign, so they are invalid arguments.
/// </remarks>
public BitVecExpr BVSign
{
get
{
return new BitVecExpr(Context, Native.Z3_fpa_get_numeral_sign_bv(Context.nCtx, NativeObject));
}
}
/// <summary>
/// The exponent of a floating-point numeral as a bit-vector expression
/// </summary>
/// <remarks>
/// +oo, -oo and NaN's do not have a bit-vector exponent, so they are invalid arguments.
/// </remarks>
public BitVecExpr BVExponent
{
get
{
return new BitVecExpr(Context, Native.Z3_fpa_get_numeral_exponent_bv(Context.nCtx, NativeObject));
}
}
/// <summary>
/// The significand of a floating-point numeral as a bit-vector expression
/// </summary>
/// <remarks>
/// +oo, -oo and NaN's do not have a bit-vector significand, so they are invalid arguments.
/// </remarks>
public BitVecExpr BVSignificand
{
get
{
return new BitVecExpr(Context, Native.Z3_fpa_get_numeral_significand_bv(Context.nCtx, NativeObject));
}
}
/// <summary>
/// Retrieves the sign of a floating-point literal
/// </summary>
@ -38,7 +80,7 @@ namespace Microsoft.Z3
get
{
int res = 0;
if (Native.Z3_fpa_get_numeral_sign(Context.nCtx, NativeObject, ref res) == 0)
if (Native.Z3_fpa_get_numeral_sign(Context.nCtx, NativeObject, ref res) == 0)
throw new Z3Exception("Sign is not a Boolean value");
return res != 0;
}
@ -63,7 +105,7 @@ namespace Microsoft.Z3
/// The significand value of a floating-point numeral as a UInt64
/// </summary>
/// <remarks>
/// This function extracts the significand bits, without the
/// This function extracts the significand bits, without the
/// hidden bit or normalization. Throws an exception if the
/// significand does not fit into a UInt64.
/// </remarks>
@ -73,7 +115,7 @@ namespace Microsoft.Z3
{
UInt64 result = 0;
if (Native.Z3_fpa_get_numeral_significand_uint64(Context.nCtx, NativeObject, ref result) == 0)
throw new Z3Exception("Significand is not a 64 bit unsigned integer");
throw new Z3Exception("Significand is not a 64 bit unsigned integer");
return result;
}
}
@ -113,7 +155,7 @@ namespace Microsoft.Z3
/// <summary>
/// Returns a string representation of the numeral.
/// </summary>
/// </summary>
public override string ToString()
{
return Native.Z3_get_numeral_string(Context.nCtx, NativeObject);