from fpcommon.postnormalise import (FPNorm1Data, FPNorm1ModSingle,
FPNorm1ModMulti, FPNorm1Single, FPNorm1Multi)
from fpcommon.roundz import (FPRoundData, FPRoundMod, FPRound)
+from fpcommon.corrections import (FPCorrectionsMod, FPCorrections)
+from fpcommon.pack import (FPPackData, FPPackMod, FPPack)
+from fpcommon.normtopack import FPNormToPack
class FPAddSpecialCasesMod:
m.next = "normalise_1"
-class FPNormToPack(FPState, UnbufferedPipeline):
-
- def __init__(self, width, id_wid):
- FPState.__init__(self, "normalise_1")
- self.id_wid = id_wid
- self.width = width
- UnbufferedPipeline.__init__(self, self) # pipeline is its own stage
-
- def ispec(self):
- return FPAddStage1Data(self.width, self.id_wid) # Norm1ModSingle ispec
-
- def ospec(self):
- return FPPackData(self.width, self.id_wid) # FPPackMod ospec
-
- def setup(self, m, i):
- """ links module to inputs and outputs
- """
-
- # Normalisation, Rounding Corrections, Pack - in a chain
- nmod = FPNorm1ModSingle(self.width, self.id_wid)
- rmod = FPRoundMod(self.width, self.id_wid)
- cmod = FPCorrectionsMod(self.width, self.id_wid)
- pmod = FPPackMod(self.width, self.id_wid)
- chain = StageChain([nmod, rmod, cmod, pmod])
- chain.setup(m, i)
- self.out_z = pmod.ospec()
-
- self.o = pmod.o
-
- def process(self, i):
- return self.o
-
- def action(self, m):
- m.d.sync += self.out_z.eq(self.process(None))
- m.next = "pack_put_z"
-
-
-class FPCorrectionsMod:
-
- def __init__(self, width, id_wid):
- self.width = width
- self.id_wid = id_wid
- self.i = self.ispec()
- self.out_z = self.ospec()
-
- def ispec(self):
- return FPRoundData(self.width, self.id_wid)
-
- def ospec(self):
- return FPRoundData(self.width, self.id_wid)
-
- def process(self, i):
- return self.out_z
-
- def setup(self, m, i):
- """ links module to inputs and outputs
- """
- m.submodules.corrections = self
- m.d.comb += self.i.eq(i)
-
- def elaborate(self, platform):
- m = Module()
- m.submodules.corr_in_z = self.i.z
- m.submodules.corr_out_z = self.out_z.z
- m.d.comb += self.out_z.eq(self.i) # copies mid, z, out_do_z
- with m.If(~self.i.out_do_z):
- with m.If(self.i.z.is_denormalised):
- m.d.comb += self.out_z.z.e.eq(self.i.z.N127)
- return m
-
-
-class FPCorrections(FPState):
-
- def __init__(self, width, id_wid):
- FPState.__init__(self, "corrections")
- self.mod = FPCorrectionsMod(width)
- self.out_z = self.ospec()
-
- def ispec(self):
- return self.mod.ispec()
-
- def ospec(self):
- return self.mod.ospec()
-
- def setup(self, m, in_z):
- """ links module to inputs and outputs
- """
- self.mod.setup(m, in_z)
-
- m.d.sync += self.out_z.eq(self.mod.out_z)
- m.d.sync += self.out_z.mid.eq(self.mod.o.mid)
-
- def action(self, m):
- m.next = "pack"
-
-
-class FPPackData:
-
- def __init__(self, width, id_wid):
- self.z = Signal(width, reset_less=True)
- self.mid = Signal(id_wid, reset_less=True)
-
- def eq(self, i):
- return [self.z.eq(i.z), self.mid.eq(i.mid)]
-
- def ports(self):
- return [self.z, self.mid]
-
-
-class FPPackMod:
-
- def __init__(self, width, id_wid):
- self.width = width
- self.id_wid = id_wid
- self.i = self.ispec()
- self.o = self.ospec()
-
- def ispec(self):
- return FPRoundData(self.width, self.id_wid)
-
- def ospec(self):
- return FPPackData(self.width, self.id_wid)
-
- def process(self, i):
- return self.o
-
- def setup(self, m, in_z):
- """ links module to inputs and outputs
- """
- m.submodules.pack = self
- m.d.comb += self.i.eq(in_z)
-
- def elaborate(self, platform):
- m = Module()
- z = FPNumOut(self.width, False)
- m.submodules.pack_in_z = self.i.z
- m.submodules.pack_out_z = z
- m.d.comb += self.o.mid.eq(self.i.mid)
- with m.If(~self.i.out_do_z):
- with m.If(self.i.z.is_overflowed):
- m.d.comb += z.inf(self.i.z.s)
- with m.Else():
- m.d.comb += z.create(self.i.z.s, self.i.z.e, self.i.z.m)
- with m.Else():
- m.d.comb += z.v.eq(self.i.oz)
- m.d.comb += self.o.z.eq(z.v)
- return m
-
-
-class FPPack(FPState):
-
- def __init__(self, width, id_wid):
- FPState.__init__(self, "pack")
- self.mod = FPPackMod(width)
- self.out_z = self.ospec()
-
- def ispec(self):
- return self.mod.ispec()
-
- def ospec(self):
- return self.mod.ospec()
-
- def setup(self, m, in_z):
- """ links module to inputs and outputs
- """
- self.mod.setup(m, in_z)
-
- m.d.sync += self.out_z.v.eq(self.mod.out_z.v)
- m.d.sync += self.out_z.mid.eq(self.mod.o.mid)
-
- def action(self, m):
- m.next = "pack_put_z"
-
class FPPutZ(FPState):
projects / ieee754fpu.git / blobdiff