增加firtool

.gitignore

@@ -1,7 +1,3 @@
-prj/simulation/icarus/
-user/src/test.v
-user/sim/wave.vcd
-user/sim/testbench.v
 *.~vsdx
 *.pdf
 ~*.xlsx
@@ -10,3 +6,4 @@ user/sim/testbench.v
 *.~vsd
 
 .vscode/
+.metals/

chisel/.gitignore

@@ -13,6 +13,7 @@
 !build.sc
 !README.md
 !playground/doc/*
+!utils/*
 build/
 
 # mill

chisel/utils/firtool

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+firtool.elf.strip --lowering-options=disallowLocalVariables,disallowPackedArrays,locationInfoStyle=wrapInAtSquareBracket $@