public IXILMapping TryAllocate(Component host, XILInstr instr, TypeDescriptor[] operandTypes, TypeDescriptor[] resultTypes, IProject proj)
{
if (instr.Name != InstructionCodes.Mul)
{
return(null);
}
FixFormat fmta, fmtb, fmtr;
fmta = GetFixFormat(operandTypes[0]);
fmtb = GetFixFormat(operandTypes[1]);
fmtr = GetFixFormat(resultTypes[0]);
if (fmta == null || fmtb == null || fmtr == null)
{
return(null);
}
bool expectSigned = fmta.IsSigned || fmtb.IsSigned;
if (expectSigned != fmtr.IsSigned)
{
return(null);
}
int high = fmtr.IntWidth + fmta.FracWidth + fmtb.FracWidth - 1;
int low = fmta.FracWidth + fmtb.FracWidth - fmtr.FracWidth;
var xproj = proj as XilinxProject;
XilinxMultiplier.EGenerator gen = XilinxMultiplier.EGenerator.Multiplier_11_2;
switch (xproj.ISEVersion)
{
case EISEVersion._11_1:
case EISEVersion._11_2:
case EISEVersion._11_3:
case EISEVersion._11_4:
case EISEVersion._11_5:
gen = XilinxMultiplier.EGenerator.Multiplier_11_0;
break;
}
XilinxMultiplier mul = new XilinxMultiplier()
{
Generator = gen,
HasCE = false,
MultiplierConstruction = XilinxMultiplier.EConstruction.UseMults,
MultType = XilinxMultiplier.EMultiplierType.ParallelMultiplier,
OptGoal = XilinxMultiplier.EOptimizationGoal.Speed,
UseCustomOutputWidth = true,
OutputWidthHigh = high,
OutputWidthLow = low,
PortAType = fmta.IsSigned ? XilinxMultiplier.ESignedness.Signed : XilinxMultiplier.ESignedness.Unsigned,
PortAWidth = fmta.TotalWidth,
PortBType = fmtb.IsSigned ? XilinxMultiplier.ESignedness.Signed : XilinxMultiplier.ESignedness.Unsigned,
PortBWidth = fmtb.TotalWidth,
HasSCLR = false,
UseRounding = false,
ZeroDetect = false
};
int optStages = ComputeOptimalPipeStages(mul);
{
// debug only
DesignContext.Push();
var mul2 = new XilinxMultiplier()
{
Generator = gen,
HasCE = false,
MultiplierConstruction = XilinxMultiplier.EConstruction.UseMults,
MultType = XilinxMultiplier.EMultiplierType.ParallelMultiplier,
OptGoal = XilinxMultiplier.EOptimizationGoal.Speed,
UseCustomOutputWidth = true,
OutputWidthHigh = high,
OutputWidthLow = low,
PortAType = fmtb.IsSigned ? XilinxMultiplier.ESignedness.Signed : XilinxMultiplier.ESignedness.Unsigned,
PortAWidth = fmtb.TotalWidth,
PortBType = fmta.IsSigned ? XilinxMultiplier.ESignedness.Signed : XilinxMultiplier.ESignedness.Unsigned,
PortBWidth = fmta.TotalWidth,
HasSCLR = false,
UseRounding = false,
ZeroDetect = false
};
Debug.Assert(optStages == ComputeOptimalPipeStages(mul2));
DesignContext.Pop();
}
int scaledStages = (int)Math.Round(Config.PipeStageScaling * optStages);
mul.PipeStages = scaledStages;
return(new XILMapping(mul, false));
}
/// <summary>
/// Executes the HLS design flow.
/// </summary>
/// <param name="design">the design</param>
/// <param name="host">the hosting component</param>
/// <param name="proc">the process being subject to HLS</param>
/// <param name="targetProject">the target project</param>
/// <remarks>Inside the hosting component, the process will be replaced by the synthesized hardware.</remarks>
public void Execute(DesignContext design, Component host, ProcessDescriptor proc, IProject targetProject)
{
Contract.Requires <ArgumentNullException>(design != null);
Contract.Requires <ArgumentNullException>(host != null);
Contract.Requires <ArgumentNullException>(proc != null);
Contract.Requires <ArgumentNullException>(targetProject != null);
design.CurrentProcess = proc.Instance;
var clk = proc.Sensitivity[0];
SignalBase clkI;
var sdClk = clk as SignalDescriptor;
if (sdClk == null)
{
clkI = ((SignalDescriptor)((PortDescriptor)clk).BoundSignal).Instance;
}
else
{
clkI = sdClk.Instance;
}
var state = new HLSState(this, design, host, proc, targetProject);
proc.AddAttribute(state);
if (_beginHLS != null)
{
_beginHLS(state);
}
var dpb = new DefaultDatapathBuilder(host, clkI, proc.Name);
state.InterconnectBuilder = InterconnectBuilder.Create(host, dpb.ICBinder);
state.ControlpathBuilder = ControlPathBuilder.Create(host, dpb.FUBinder);
state.ControlpathBuilder.PersonalizePlan(this);
do
{
XILSFunction fnasm;
if (!proc.HasAttribute <XILSFunction>())
{
var func = proc.Implementation;
IEnumerable <Function> inlinedFunctions;
func = func.InlineCalls(out inlinedFunctions);
if (ConvertFieldsToLocals)
{
Variable[] newLocals;
func = func.ConvertFieldsToLocals(out newLocals);
}
state.PreprocessedFunction = func;
fnasm = state.PreprocessedFunction.Compile(DefaultInstructionSet.Instance);
}
else
{
fnasm = proc.QueryAttribute <XILSFunction>();
}
fnasm.SanityCheck();
state.XILSInput = fnasm;
IList <XILSInstr> instrs = state.XILSInput.Instructions.ToList();
foreach (var rw in XILSTransformations)
{
instrs = rw.Rewrite(instrs);
fnasm = new XILSFunction(fnasm.Name, fnasm.Arguments, fnasm.Locals, instrs.ToArray());
fnasm.SanityCheck();
}
state.XILSTransformed = fnasm;
XIL3Function fnasm3 = fnasm.ToXIL3();
state.XIL3Input = fnasm3;
foreach (IXIL3Rewriter rw in XIL3Transformations)
{
fnasm3 = rw.Rewrite(fnasm3);
fnasm3.SanityCheck();
}
state.XIL3Transformed = fnasm3;
state.NotifyProgress(EHLSProgress.Compiled);
} while (state._repeat);
if (state._cancel)
{
return;
}
SchedulingConstraints constraints;
do
{
var xmm = new XILMapperManager();
foreach (var dpu in Enumerable.Reverse(XILMappers))
{
xmm.AddMapper(dpu);
}
DesignContext.Push();
var xilsa = new XILSchedulingAdapter(state.XIL3Transformed, xmm, host, targetProject);
if (AllocationPolicy != null)
{
xilsa.Allocator.Policy = AllocationPolicy.Create();
}
if (_onFUCreated != null)
{
xilsa.Allocator.OnFUAllocation += _onFUCreated;
}
state.SchedulingAdapter = xilsa;
state.NotifyProgress(EHLSProgress.AboutToSchedule);
constraints = SchedulingConstraints;
if (constraints == null)
{
if (proc.Implementation != null)
{
constraints = proc.Implementation.QueryAttribute <SchedulingConstraints>();
}
if (constraints == null)
{
constraints = new SchedulingConstraints();
}
}
state.Constraints = constraints;
if (constraints.MinimizeNumberOfFUs)
{
foreach (var instr in state.XIL3Transformed.Instructions)
{
xilsa.SetMaxFUAllocation(xilsa.IClass[instr], 1);
}
}
Scheduler.Schedule(xilsa.CFG, constraints, xilsa);
DesignContext.Pop();
state.NotifyProgress(EHLSProgress.Scheduled);
} while (state._repeat);
ComputeCStepsForBranchTargets(state.SchedulingAdapter);
do
{
state.ControlpathBuilder.PrepareAllocation(state.SchedulingAdapter.ComputeCStepCount());
var flowSpec = state.SchedulingAdapter.Allocate(dpb);
state.RawFlows = flowSpec;
var realFlow = new FlowMatrix();
state.InterconnectBuilder.CreateInterconnect(flowSpec, realFlow);
state.RealFlows = realFlow;
state.NotifyProgress(EHLSProgress.InterconnectCreated);
} while (state._repeat);
if (state._cancel)
{
return;
}
Debug.Assert(state.RealFlows.FlowSources.All(sr => sr.Desc.Owner != null));
Debug.Assert(state.RealFlows.FlowTargets.All(sr => sr.Desc.Owner != null));
do
{
state.ControlpathBuilder.CreateControlpath(state.RealFlows, proc.Name);
foreach (var prof in constraints.Profilers)
{
prof.ExtractFrom(state.XIL3Transformed, state.SchedulingAdapter);
}
state.NotifyProgress(EHLSProgress.ControlpathCreated);
} while (state._repeat);
if (state._cancel)
{
return;
}
}