move fpcommon to separate subdir

[ieee754fpu.git] / src / ieee754 / add / fpcommon / roundz.py

diff --git a/src/ieee754/add/fpcommon/roundz.py b/src/ieee754/add/fpcommon/roundz.py
deleted file mode 100644 (file)
index 420d666..0000000
--- a/src/ieee754/add/fpcommon/roundz.py
+++ /dev/null
@@ -1,82 +0,0 @@
-# IEEE Floating Point Adder (Single Precision)
-# Copyright (C) Jonathan P Dawson 2013
-# 2013-12-12
-
-from nmigen import Module, Signal, Elaboratable
-from nmigen.cli import main, verilog
-
-from fpbase import FPNumBase
-from fpbase import FPState
-from fpcommon.postnormalise import FPNorm1Data
-
-
-class FPRoundData:
-
-    def __init__(self, width, id_wid):
-        self.z = FPNumBase(width, False)
-        self.out_do_z = Signal(reset_less=True)
-        self.oz = Signal(width, reset_less=True)
-        self.mid = Signal(id_wid, reset_less=True)
-
-    def eq(self, i):
-        return [self.z.eq(i.z), self.out_do_z.eq(i.out_do_z), self.oz.eq(i.oz),
-                self.mid.eq(i.mid)]
-
-
-class FPRoundMod(Elaboratable):
-
-    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 FPNorm1Data(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):
-        m.submodules.roundz = self
-        m.d.comb += self.i.eq(i)
-
-    def elaborate(self, platform):
-        m = Module()
-        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.roundz):
-                m.d.comb += self.out_z.z.m.eq(self.i.z.m + 1) # mantissa up
-                with m.If(self.i.z.m == self.i.z.m1s): # all 1s
-                    m.d.comb += self.out_z.z.e.eq(self.i.z.e + 1) # exponent up
-
-        return m
-
-
-class FPRound(FPState):
-
-    def __init__(self, width, id_wid):
-        FPState.__init__(self, "round")
-        self.mod = FPRoundMod(width)
-        self.out_z = self.ospec()
-
-    def ispec(self):
-        return self.mod.ispec()
-
-    def ospec(self):
-        return self.mod.ospec()
-
-    def setup(self, m, i):
-        """ links module to inputs and outputs
-        """
-        self.mod.setup(m, i)
-
-        self.idsync(m)
-        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 = "corrections"