private Bitfield ConcatenateContextRegionBitfields(Instruction_ContextRegion contextRegion)
{
var aggBitfield = contextRegion.BitfieldWrapper.ToAggregatedBitfield();
return(aggBitfield);
}
private Instruction_ContextRegion BuildContextRegionBitfields(List <List <Instruction> > instrSets, out uint contextRegionByteSize, out uint maxInstrPathByteSize)
{
var contextRegion = new Instruction_ContextRegion();
contextRegion.ToBitfieldWrapper();
// Build common context-region:
var contextRegionByteLenBitfield = new Bitfield(width: 16, name: "contx-reg byte len");
var instrRegionByteLenBitfield = new Bitfield(width: 32, name: "instr-reg byte len");
var ledCountBitfield = new Bitfield(width: 16, value: DeviceTable.Dev.LedCount, name: "total led len");
var timerIntervalMs = new Bitfield(width: 16, value: DeviceTable.Dev.TickIntervalMs, name: "tick interval ms");
var simBrightCoeffBitfield = new Bitfield(width: 16, value: DeviceTable.Dev.SimulatorBrightnessCoeff, name: "sim bright coeff");
var totalPathsBitfield = new Bitfield(width: 8, value: (uint)instrSets.Count, name: "total paths");
var pathEndedBitmap = new Bitfield(width: (uint)instrSets.Count, name: "path end bitmap");
contextRegion.BitfieldWrapper.AddBitfield(contextRegionByteLenBitfield);
contextRegion.BitfieldWrapper.AddBitfield(instrRegionByteLenBitfield);
contextRegion.BitfieldWrapper.AddBitfield(ledCountBitfield);
contextRegion.BitfieldWrapper.AddBitfield(timerIntervalMs);
contextRegion.BitfieldWrapper.AddBitfield(simBrightCoeffBitfield);
contextRegion.BitfieldWrapper.AddBitfield(totalPathsBitfield);
contextRegion.BitfieldWrapper.AddBitfield(pathEndedBitmap);
uint totalInstrRegionByteLen = 0;
maxInstrPathByteSize = 0;
// Build a context-region block for each path:
for (var i = 0; i < instrSets.Count; i++)
{
// Mark current path as ended (except path 0):
if (i > 0)
{
pathEndedBitmap.SetFlag((uint)(instrSets.Count - i - 1));
}
// Add start of current path byte-address bitfield:
if ((instrSets[i].First().BitAddress - instrSets[0].First().BitAddress) % BitsPerByte > 0)
{
Console.WriteLine("Byte alignment error");
throw new Exception();
}
var pathStartByteAddr = (instrSets[i].First().BitAddress - instrSets[0].First().BitAddress) >> BitByteShift;
var opcode2Bit = MiscOps.GetOpcode2Bit(pathStartByteAddr, out var valueBitWidth);
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: 2, value: opcode2Bit, name: "byte width opcode"));
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: valueBitWidth, value: pathStartByteAddr, name: $"path={i} byte addr"));
// Add current path byte-length bitfield:
var instrPathByteLen = (instrSets[i].Last().BitAddress + instrSets[i].Last().BitfieldWrapper.BitWidth - instrSets[i].First().BitAddress) >> BitByteShift;
opcode2Bit = MiscOps.GetOpcode2Bit(instrPathByteLen, out valueBitWidth);
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: 2, value: opcode2Bit, name: "byte width opcode"));
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: valueBitWidth, value: instrPathByteLen, name: $"path={i} byte len"));
// Keep running total of paths length:
totalInstrRegionByteLen += instrPathByteLen;
maxInstrPathByteSize = Math.Max(maxInstrPathByteSize, instrPathByteLen);
// Add current path instruction bit address bitfield:
var instrBitAddr = instrPathByteLen << BitByteShift; // max possible value is number of bits in path.
opcode2Bit = MiscOps.GetOpcode2Bit(instrBitAddr, out valueBitWidth);
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: 2, value: opcode2Bit, name: "byte width opcode"));
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: valueBitWidth, value: 0, name: $"path={i} instr bit addr"));
// Add current path extra-value bitfield:
uint maxValue = 0;
var rampInstrs = instrSets[i].Where(x => x.Type == Instruction.InstrType.GlowRamp);
if (rampInstrs.Count() > 0)
{
maxValue = rampInstrs.Max(x => ((GlowRampInstruction)x).RampTicks);
}
var opcode3Bit = MiscOps.GetOpcode3Bit(maxValue, out valueBitWidth);
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: 3, value: opcode3Bit, name: "byte width opcode"));
if (valueBitWidth > 0)
{
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: valueBitWidth, value: 0, name: $"path={i} extra value"));
}
// Add current path pause-ticks bitfield:
maxValue = 0;
var pauseInstrs = instrSets[i].Where(x => x.Type == Instruction.InstrType.Pause);
if (pauseInstrs.Count() > 0)
{
maxValue = pauseInstrs.Max(x => ((PauseInstruction)x).Ticks);
}
else if (rampInstrs.Count() > 0)
{
maxValue = 1;
}
opcode3Bit = MiscOps.GetOpcode3Bit(maxValue, out valueBitWidth);
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: 3, value: opcode3Bit, name: "byte width opcode"));
if (valueBitWidth > 0)
{
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(width: valueBitWidth, value: 0, name: $"path={i} pause ticks"));
}
}
// Set total instruction region byte length:
instrRegionByteLenBitfield.SetValue(totalInstrRegionByteLen);
// Add padding to context-region so following instruction path memory is byte-aligned:
var paddingWidth = BitsPerByte - (contextRegion.BitfieldWrapper.BitWidth % BitsPerByte);
if (paddingWidth < 8)
{
contextRegion.BitfieldWrapper.AddBitfield(new Bitfield(paddingWidth, "byte-align padding"));
}
// Set total context-region byte length (convert from bits):
contextRegionByteSize = contextRegion.BitfieldWrapper.BitWidth >> BitByteShift;
contextRegionByteLenBitfield.SetValue(contextRegionByteSize);
return(contextRegion);
}
