+class FPRoundMod:
+
+ def __init__(self, width):
+ self.in_roundz = Signal(reset_less=True)
+ self.in_z = FPNumBase(width, False)
+ self.out_z = FPNumBase(width, False)
+
+ def setup(self, m, in_z, out_z, in_of):
+ """ links module to inputs and outputs
+ """
+ m.d.comb += self.in_z.copy(in_z)
+ m.d.comb += out_z.copy(self.out_z)
+ m.d.comb += self.in_roundz.eq(in_of.roundz)
+
+ def elaborate(self, platform):
+ m = Module()
+ m.d.comb += self.out_z.copy(self.in_z)
+ with m.If(self.in_roundz):
+ m.d.comb += self.out_z.m.eq(self.in_z.m + 1) # mantissa rounds up
+ with m.If(self.in_z.m == self.in_z.m1s): # all 1s
+ m.d.comb += self.out_z.e.eq(self.in_z.e + 1) # exponent up
+ return m
+
+