Add rtl for friendly_modulo

ChaCha20_Poly1305_64/sim/poly1305.yaml

@@ -4,4 +4,10 @@ tests:
     modules: 
       - "poly1305_core"
     sources: "sources.list"
+    waves: True
+  - name: "friendly_modulo"
+    toplevel: "poly1305_friendly_modulo"
+    modules:
+      - "poly1305_friendly_modulo"
+    sources: sources.list
     waves: True

ChaCha20_Poly1305_64/sim/poly1305_friendly_modulo.py

@@ -0,0 +1,62 @@
+import logging
+
+
+import cocotb
+from cocotb.clock import Clock
+from cocotb.triggers import Timer, RisingEdge, FallingEdge
+from cocotb.queue import Queue
+
+from cocotbext.axi import AxiStreamBus, AxiStreamSource
+
+import random
+
+PRIME = 2**130-5
+
+CLK_PERIOD = 4
+
+
+class TB:
+    def __init__(self, dut):
+        self.dut = dut
+
+        self.log = logging.getLogger("cocotb.tb")
+        self.log.setLevel(logging.INFO)
+
+        cocotb.start_soon(Clock(self.dut.i_clk, CLK_PERIOD, units="ns").start())
+
+    async def cycle_reset(self):
+        await self._cycle_reset(self.dut.i_rst, self.dut.i_clk)
+
+    async def _cycle_reset(self, rst, clk):
+        rst.setimmediatevalue(0)
+        await RisingEdge(clk)
+        await RisingEdge(clk)
+        rst.value = 1
+        await RisingEdge(clk)
+        await RisingEdge(clk)
+        rst.value = 0
+        await RisingEdge(clk)
+        await RisingEdge(clk)
+
+@cocotb.test
+async def test_sanity(dut):
+    tb = TB(dut)
+
+    await tb.cycle_reset()
+
+    value_a = random.randint(1,2**(130+16))
+
+    # value_a = PRIME + 1000000
+    tb.dut.i_valid.value = 1
+    tb.dut.i_val.value = value_a
+    await RisingEdge(tb.dut.i_clk)
+    tb.dut.i_valid.value = 0
+    tb.dut.i_val.value = 0
+
+    await RisingEdge(tb.dut.o_valid)
+    value = tb.dut.o_result.value.integer
+
+    print(value_a % PRIME)
+    print(value)
+
+    await Timer(1, "us")