bazel: add PLACE_DENSITY sweep for asap7/gcd

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/designs/asap7/gcd/BUILD.bazel

@@ -0,0 +1,48 @@
+load("@bazel-orfs//:sweep.bzl", "orfs_sweep")
+load("//util:plot_congestion.bzl", "plot_congestion")
+
+# Format densities, rounding to 2 decimal places.
+SWEEPS = {
+    "PLACE_DENSITY": [str(0.35 + x * 0.01 + 0.005)[:4] for x in range(65)],
+    "CORE_UTILIZATION": [str(40 + x * 5) for x in range(4)],
+}
+
+SWEEP = "PLACE_DENSITY"
+
+orfs_sweep(
+    name = "gcd",
+    arguments = {
+        # Faster builds
+        "SKIP_INCREMENTAL_REPAIR": "1",
+        "GPL_TIMING_DRIVEN": "0",
+        "SKIP_LAST_GASP": "1",
+        # Various
+        "DIE_AREA": "0 0 16.2 16.2",
+        "CORE_AREA": "1.08 1.08 15.12 15.12",
+        "PLACE_DENSITY": "0.35",
+        "SDC_FILE": "$(location :constraint.sdc)",
+    },
+    other_variants = {"base": {}},
+    sources = {
+        "SDC_FILE": [":constraint.sdc"],
+    },
+    sweep = {
+        value: {
+            "arguments": {
+                SWEEP: value,
+            },
+            "previous_stage": {
+                "floorplan": "gcd_synth",
+            },
+        }
+        for value in SWEEPS[SWEEP]
+    },
+    verilog_files = ["//designs/src/gcd:verilog"],
+)
+
+plot_congestion(
+    name = "plot",
+    srcs = [":gcd_{value}_grt".format(value = value) for value in SWEEPS[SWEEP]],
+    argument = SWEEP,
+    values = SWEEPS[SWEEP],
+)

flow/designs/asap7/gcd/config.mk

@@ -7,6 +7,8 @@ export SDC_FILE               = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/constr
 
 export DIE_AREA               = 0 0 16.2 16.2
 export CORE_AREA              = 1.08 1.08 15.12 15.12
+# The goal of this design is to have a smoketest that builds quickly,
+# that said, this design will go through grt with a 0.99 placement density.
 export PLACE_DENSITY          = 0.35
 
 # a smoketest for this option, there are a

flow/designs/src/gcd/BUILD.bazel

@@ -0,0 +1,5 @@
+filegroup(
+    name = "verilog",
+    srcs = glob(include = ["*.v"]),
+    visibility = ["//visibility:public"],
+)