convert to DynamicPipe (default class in PipelineSpec: SimpleHandshake)

[ieee754fpu.git] / src / ieee754 / fpadd / specialcases.py

diff --git a/src/ieee754/fpadd/specialcases.py b/src/ieee754/fpadd/specialcases.py
index 3221e9cc73cf0c3fc4ebd19eac019f8fb104d1e0..33b1811afcf225e0fe9611d87141f132b5f7d043 100644 (file)
--- a/src/ieee754/fpadd/specialcases.py
+++ b/src/ieee754/fpadd/specialcases.py
@@ -10,7 +10,7 @@ from ieee754.fpcommon.fpbase import FPNumDecode
 from nmutil.singlepipe import StageChain
 from ieee754.pipeline import DynamicPipe
 
-from ieee754.fpcommon.fpbase import FPState, FPID, FPNumBaseRecord
+from ieee754.fpcommon.fpbase import FPNumBaseRecord
 from ieee754.fpcommon.getop import FPADDBaseData
 from ieee754.fpcommon.denorm import (FPSCData, FPAddDeNormMod)
 
@@ -146,33 +146,6 @@ class FPAddSpecialCasesMod(Elaboratable):
         return m
 
 
-class FPAddSpecialCases(FPState):
-    """ special cases: NaNs, infs, zeros, denormalised
-        NOTE: some of these are unique to add.  see "Special Operations"
-        https://steve.hollasch.net/cgindex/coding/ieeefloat.html
-    """
-
-    def __init__(self, width, id_wid):
-        FPState.__init__(self, "special_cases")
-        self.mod = FPAddSpecialCasesMod(width)
-        self.out_z = self.mod.ospec()
-        self.out_do_z = Signal(reset_less=True)
-
-    def setup(self, m, i):
-        """ links module to inputs and outputs
-        """
-        self.mod.setup(m, i, self.out_do_z)
-        m.d.sync += self.out_z.v.eq(self.mod.out_z.v) # only take the output
-        m.d.sync += self.out_z.ctx.eq(self.mod.o.ctx)  # (and mid)
-
-    def action(self, m):
-        self.idsync(m)
-        with m.If(self.out_do_z):
-            m.next = "put_z"
-        with m.Else():
-            m.next = "denormalise"
-
-
 class FPAddSpecialCasesDeNorm(DynamicPipe):
     """ special cases: NaNs, infs, zeros, denormalised
         NOTE: some of these are unique to add.  see "Special Operations"