public FPUWrapper(EISEVersion iseVer)
{
var a = new SLVSignal(32);
var b = new SLVSignal(32);
var r = new SLVSignal(32);
var clk = new SLSignal();
_fpu = new FloatingPointCore()
{
A = a,
B = b,
Clk = clk,
Result = r,
DSP48EUsage = FloatingPointCore.EDSP48EUsage.FullUsage,
Function = FloatingPointCore.EFunction.AddSubtract,
TargetDeviceFamily = SystemSharp.Interop.Xilinx.EDeviceFamily.Virtex6,
UseMaximumLatency = true,
Precision = FloatingPointCore.EPrecision.Single,
ResultPrecision = FloatingPointCore.EPrecision.Single,
AddSubSel = FloatingPointCore.EAddSub.Add,
TargetISEVersion = iseVer
};
Clk = clk;
A = a;
B = b;
R = r;
}
public TransactionSite(FloatingPointCore host):
base(host)
{
_host = host;
}
public IXILMapping TryAllocate(Component host, XILInstr instr, TypeDescriptor[] operandTypes, TypeDescriptor[] resultTypes, IProject proj)
{
XilinxProject xproj = proj as XilinxProject;
if (xproj == null)
return null;
Type otype = operandTypes[0].CILType;
if (!operandTypes.All(t => t.CILType.Equals(otype)))
return null;
Type rtype = resultTypes[0].CILType;
FloatingPointCore fpu = null;
CoreConfiguration cfg = null;
switch (instr.Name)
{
case InstructionCodes.Add:
case InstructionCodes.Sub:
{
FloatingPointCore.EPrecision prec = FloatingPointCore.EPrecision.Single;
if (otype.Equals(typeof(float)))
prec = FloatingPointCore.EPrecision.Single;
else if (otype.Equals(typeof(double)))
prec = FloatingPointCore.EPrecision.Double;
else
return null;
fpu = new FloatingPointCore()
{
Function = FloatingPointCore.EFunction.AddSubtract,
Precision = prec,
ResultPrecision = prec,
};
cfg = Config[prec, FloatingPointCore.EFunction.AddSubtract];
if (cfg.UseDedicatedAddSub)
{
if (instr.Name.Equals(InstructionCodes.Add))
fpu.AddSubSel = FloatingPointCore.EAddSub.Add;
else
fpu.AddSubSel = FloatingPointCore.EAddSub.Subtract;
}
else
{
fpu.AddSubSel = FloatingPointCore.EAddSub.Both;
}
}
break;
case InstructionCodes.IsEq:
case InstructionCodes.IsGt:
case InstructionCodes.IsGte:
case InstructionCodes.IsLt:
case InstructionCodes.IsLte:
case InstructionCodes.IsNEq:
{
FloatingPointCore.EPrecision prec = FloatingPointCore.EPrecision.Single;
if (otype.Equals(typeof(float)))
prec = FloatingPointCore.EPrecision.Single;
else if (otype.Equals(typeof(double)))
prec = FloatingPointCore.EPrecision.Double;
else
return null;
fpu = new FloatingPointCore()
{
Function = FloatingPointCore.EFunction.Compare,
Precision = prec
};
cfg = Config[prec, FloatingPointCore.EFunction.Compare];
if (cfg.UseDedicatedCmp)
{
switch (instr.Name)
{
case InstructionCodes.IsEq:
fpu.CompareSel = FloatingPointCore.ECompareOp.Equal;
break;
case InstructionCodes.IsGt:
fpu.CompareSel = FloatingPointCore.ECompareOp.GreaterThan;
break;
case InstructionCodes.IsGte:
fpu.CompareSel = FloatingPointCore.ECompareOp.GreaterThanOrEqual;
break;
case InstructionCodes.IsLt:
fpu.CompareSel = FloatingPointCore.ECompareOp.LessThan;
break;
case InstructionCodes.IsLte:
fpu.CompareSel = FloatingPointCore.ECompareOp.LessThanOrEqual;
break;
case InstructionCodes.IsNEq:
fpu.CompareSel = FloatingPointCore.ECompareOp.NotEqual;
break;
default:
throw new NotImplementedException();
}
}
else
{
fpu.CompareSel = FloatingPointCore.ECompareOp.Programmable;
}
fpu.ResultPrecision = FloatingPointCore.EPrecision.Custom;
fpu.ResultExponentWidth = 1;
fpu.ResultFractionWidth = 0;
}
break;
case InstructionCodes.Mul:
{
FloatingPointCore.EPrecision prec = FloatingPointCore.EPrecision.Single;
if (otype.Equals(typeof(float)))
prec = FloatingPointCore.EPrecision.Single;
else if (otype.Equals(typeof(double)))
prec = FloatingPointCore.EPrecision.Double;
else
return null;
fpu = new FloatingPointCore()
{
Function = FloatingPointCore.EFunction.Multiply,
Precision = prec,
ResultPrecision = prec
};
cfg = Config[prec, FloatingPointCore.EFunction.Multiply];
}
break;
case InstructionCodes.Div:
{
FloatingPointCore.EPrecision prec = FloatingPointCore.EPrecision.Single;
if (otype.Equals(typeof(float)))
prec = FloatingPointCore.EPrecision.Single;
else if (otype.Equals(typeof(double)))
prec = FloatingPointCore.EPrecision.Double;
else
return null;
fpu = new FloatingPointCore()
{
Function = FloatingPointCore.EFunction.Divide,
Precision = prec,
ResultPrecision = prec
};
cfg = Config[prec, FloatingPointCore.EFunction.Divide];
}
break;
case InstructionCodes.Sqrt:
{
FloatingPointCore.EPrecision prec = FloatingPointCore.EPrecision.Single;
if (otype.Equals(typeof(float)))
prec = FloatingPointCore.EPrecision.Single;
else if (otype.Equals(typeof(double)))
prec = FloatingPointCore.EPrecision.Double;
else
return null;
fpu = new FloatingPointCore()
{
Function = FloatingPointCore.EFunction.SquareRoot,
Precision = prec,
ResultPrecision = prec
};
cfg = Config[prec, FloatingPointCore.EFunction.SquareRoot];
}
break;
case InstructionCodes.Convert:
{
FloatingPointCore.EPrecision inprec = FloatingPointCore.EPrecision.Single;
bool infloat = false;
FixFormat infmt = null;
if (otype.Equals(typeof(float)))
{
inprec = FloatingPointCore.EPrecision.Single;
infloat = true;
}
else if (otype.Equals(typeof(double)))
{
inprec = FloatingPointCore.EPrecision.Double;
infloat = true;
}
else if (otype.Equals(typeof(SFix)) ||
otype.Equals(typeof(Signed)))
{
inprec = FloatingPointCore.EPrecision.Custom;
infloat = false;
infmt = SFix.GetFormat(operandTypes[0]);
}
else
{
return null;
}
FloatingPointCore.EPrecision outprec = FloatingPointCore.EPrecision.Single;
bool outfloat = false;
FixFormat outfmt = null;
if (rtype.Equals(typeof(float)))
{
outprec = FloatingPointCore.EPrecision.Single;
outfloat = true;
}
else if (rtype.Equals(typeof(double)))
{
outprec = FloatingPointCore.EPrecision.Double;
outfloat = true;
}
else if (rtype.Equals(typeof(SFix)) ||
rtype.Equals(typeof(Signed)))
{
outprec = FloatingPointCore.EPrecision.Custom;
outfloat = false;
outfmt = SFix.GetFormat(resultTypes[0]);
}
else
{
return null;
}
FloatingPointCore.EFunction func;
if (!infloat && !outfloat)
return null;
else if (infloat && outfloat)
func = FloatingPointCore.EFunction.FloatToFloat;
else if (infloat)
func = FloatingPointCore.EFunction.FloatToFixed;
else
func = FloatingPointCore.EFunction.FixedToFloat;
fpu = new FloatingPointCore()
{
Function = func,
Precision = inprec,
ResultPrecision = outprec
};
if (infmt != null)
{
fpu.ExponentWidth = infmt.IntWidth;
fpu.FractionWidth = infmt.FracWidth;
}
if (outfmt != null)
{
fpu.ResultExponentWidth = outfmt.IntWidth;
fpu.ResultFractionWidth = outfmt.FracWidth;
}
FloatingPointCore.EPrecision prec = infloat ? inprec : outprec;
cfg = Config[prec, FloatingPointCore.EFunction.Multiply];
}
break;
default:
return null;
}
fpu.TargetDeviceFamily = xproj.DeviceFamily;
fpu.TargetISEVersion = xproj.ISEVersion;
if (cfg.EnableDeviceCapabilityDependentDSPUsage)
{
switch (fpu.Function)
{
case FloatingPointCore.EFunction.Multiply:
switch (xproj.DeviceFamily)
{
case EDeviceFamily.Spartan3:
case EDeviceFamily.Spartan3A_3AN:
case EDeviceFamily.Spartan3E:
case EDeviceFamily.Automotive_Spartan3:
case EDeviceFamily.Automotive_Spartan3A:
case EDeviceFamily.Automotive_Spartan3E:
if (cfg.DSPUsageRatio < 0.5f)
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.FullUsage;
else
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
break;
default:
if (cfg.DSPUsageRatio < 0.25f)
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
else if (cfg.DSPUsageRatio < 0.50f)
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.MediumUsage;
else if (cfg.DSPUsageRatio < 0.75f)
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.MaxUsage;
else
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.FullUsage;
break;
}
break;
case FloatingPointCore.EFunction.AddSubtract:
if (fpu.Precision == FloatingPointCore.EPrecision.Custom)
{
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
}
else
{
switch (xproj.DeviceFamily)
{
case EDeviceFamily.Virtex4:
case EDeviceFamily.Virtex5:
case EDeviceFamily.Virtex6:
case EDeviceFamily.Virtex6_LowPower:
if (cfg.DSPUsageRatio < 0.5f)
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
else
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.FullUsage;
break;
default:
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
break;
}
}
break;
default:
fpu.DSP48EUsage = FloatingPointCore.EDSP48EUsage.NoUsage;
break;
}
}
else
{
fpu.DSP48EUsage = cfg.DSP48EUsage;
}
fpu.HasCE = cfg.HasCE;
fpu.HasDivideByZero = cfg.HasDivideByZero;
fpu.HasInvalidOp = cfg.HasInvalidOp;
fpu.HasOperationND = cfg.HasOperationND;
fpu.HasOperationRFD = cfg.HasOperationRFD;
fpu.HasOverflow = cfg.HasOverflow;
fpu.HasRdy = cfg.HasRdy;
fpu.HasSCLR = cfg.HasSCLR;
if (cfg.UseMaximumLatency)
{
fpu.UseMaximumLatency = true;
}
else if (cfg.SpecifyLatencyRatio)
{
fpu.UseMaximumLatency = false;
fpu.Latency = (int)(cfg.LatencyRatio * fpu.MaximumLatency);
}
else
{
fpu.Latency = cfg.Latency;
}
IXILMapping result = TryMapOne(fpu.TASite, instr, operandTypes, resultTypes, false);
Debug.Assert(result != null);
return result;
}
/// <summary>
/// Retrieves the configuration options for a given precision and functional selection.
/// </summary>
public CoreConfiguration this[FloatingPointCore.EPrecision prec, FloatingPointCore.EFunction func]
{
get { return _map[Tuple.Create(prec, func)]; }
}