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lib.fifo: add r_level and w_level to all FIFOs

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awygle 2020-08-15 01:40:56 -07:00 • committed by GitHub
parent f6f9d68f24
commit 73f672f57c
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2 changed files with 41 additions and 9 deletions
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10
nmigen/test/test_lib_fifo.py
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@ -70,6 +70,8 @@ class FIFOModel(Elaboratable, FIFOInterface):
self.w_domain = w_domain
self.level = Signal(range(self.depth + 1))
self.r_level = Signal(range(self.depth + 1))
self.w_level = Signal(range(self.depth + 1))
def elaborate(self, platform):
m = Module()
@ -104,6 +106,10 @@ class FIFOModel(Elaboratable, FIFOInterface):
+ (self.w_rdy & self.w_en)
- (self.r_rdy & self.r_en))
m.d.comb += [
self.r_level.eq(self.level),
self.w_level.eq(self.level),
]
m.d.comb += Assert(ResetSignal(self.r_domain) == ResetSignal(self.w_domain))
return m
@ -135,8 +141,8 @@ class FIFOModelEquivalenceSpec(Elaboratable):
m.d.comb += Assert(dut.r_rdy.implies(gold.r_rdy))
m.d.comb += Assert(dut.w_rdy.implies(gold.w_rdy))
if hasattr(dut, "level"):
m.d.comb += Assert(dut.level == gold.level)
m.d.comb += Assert(dut.r_level == gold.r_level)
m.d.comb += Assert(dut.w_level == gold.w_level)
if dut.fwft:
m.d.comb += Assert(dut.r_rdy