[reggen] Add 3 byte writes to r.width >= 16 < 24
This is related to #236.
Even Ibex doesn't support 3 byte write, reggen shouldn't care. Now it
supports 3byte writes (4'b0111).
diff --git a/util/reggen/reg_pkg.tpl.sv b/util/reggen/reg_pkg.tpl.sv
index c9cf0c5..b12cda3 100644
--- a/util/reggen/reg_pkg.tpl.sv
+++ b/util/reggen/reg_pkg.tpl.sv
@@ -207,8 +207,10 @@
localparam logic [3:0] ${block.name.upper()}_PERMIT [${block.get_n_regs_flat()}] = '{
% for i,r in enumerate(block.get_regs_flat()):
<% index_str = "{}".format(i).rjust(max_regs_char) %>\
- % if r.width > 16:
+ % if r.width > 24:
4'b 1111${" " if i == num_regs-1 else ","} // index[${index_str}] ${block.name.upper()}_${r.name.upper()}
+ % elif r.width > 16:
+ 4'b 0111${" " if i == num_regs-1 else ","} // index[${index_str}] ${block.name.upper()}_${r.name.upper()}
% elif r.width > 8:
4'b 0011${" " if i == num_regs-1 else ","} // index[${index_str}] ${block.name.upper()}_${r.name.upper()}
% else:
