Merge pull request #346 from quetric/res_est_fix

Fix resource estimate for external weights FC layer

Author: Yaman Umuroglu

docker/finn_entrypoint.sh

@@ -18,7 +18,7 @@ recho () {
 # checkout the correct dependency repo commits
 # the repos themselves are cloned in the Dockerfile
 FINN_BASE_COMMIT=ac0b86a63eb937b869bfa453a996a8a8b8506546
-FINN_EXP_COMMIT=e9f97dcdb4db2f889b0f36af079a6a1792b7d4de
+FINN_EXP_COMMIT=f82c0d9868bb88ea045dfadb28508d327d287221
 BREVITAS_COMMIT=d7ded80fa9557da2998ea310669edee7fb2d9526
 CNPY_COMMIT=4e8810b1a8637695171ed346ce68f6984e585ef4
 HLSLIB_COMMIT=4d74baefa79df48b5a0348d63f39a26df075de51

src/finn/custom_op/fpgadataflow/streamingfclayer_batch.py

@@ -239,7 +239,8 @@ def uram_estimation(self):
         mmode = self.get_nodeattr("mem_mode")
         mstyle = self.get_nodeattr("ram_style")
         if (mmode == "decoupled" and mstyle != "ultra") or (
-            mmode == "const" and self.calc_wmem() <= 128
+            mmode == "const" and self.calc_wmem() <= 128) or (
+            mmode == "external"
         ):
             return 0
         width_multiplier = math.ceil(mem_width / 72)
@@ -266,7 +267,8 @@ def bram_estimation(self):
         mmode = self.get_nodeattr("mem_mode")
         mstyle = self.get_nodeattr("ram_style")
         if (mmode == "decoupled" and mstyle in ["distributed", "ultra"]) or (
-            mmode == "const" and self.calc_wmem() <= 128
+            mmode == "const" and self.calc_wmem() <= 128) or (
+            mmode == "external"
         ):
             return 0
         # assuming SDP mode RAMB18s (see UG573 Table 1-10)