[package] add experimental match function

rtl/core/neorv32_package.vhd

@@ -29,7 +29,7 @@ package neorv32_package is
 
   -- Architecture Constants -----------------------------------------------------------------
   -- -------------------------------------------------------------------------------------------
-  constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01100707"; -- hardware version
+  constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01100708"; -- hardware version
   constant archid_c     : natural := 19; -- official RISC-V architecture ID
   constant XLEN         : natural := 32; -- native data path width
 
@@ -708,6 +708,7 @@ package neorv32_package is
   function replicate_f(input : std_ulogic; num : natural) return std_ulogic_vector;
   impure function mem32_init_f(init : mem32_t; depth : natural) return mem32_t;
   function print_version_f(version : std_ulogic_vector(31 downto 0)) return string;
+  function match_f(input : std_ulogic_vector; pattern : std_ulogic_vector) return boolean;
 
 -- **********************************************************************************************************
 -- NEORV32 Processor Top Entity (component prototype)
@@ -750,10 +751,10 @@ package neorv32_package is
       RISCV_ISA_Zksh        : boolean                        := false;
       RISCV_ISA_Zxcfu       : boolean                        := false;
       -- Tuning Options --
-      CLOCK_GATING_EN       : boolean                        := false;
-      FAST_MUL_EN           : boolean                        := false;
-      FAST_SHIFT_EN         : boolean                        := false;
-      REGFILE_HW_RST        : boolean                        := false;
+      CPU_CLOCK_GATING_EN   : boolean                        := false;
+      CPU_FAST_MUL_EN       : boolean                        := false;
+      CPU_FAST_SHIFT_EN     : boolean                        := false;
+      CPU_REGFILE_HW_RST    : boolean                        := false;
       -- Physical Memory Protection (PMP) --
       PMP_NUM_REGIONS       : natural range 0 to 16          := 0;
       PMP_MIN_GRANULARITY   : natural                        := 4;
@@ -1174,4 +1175,23 @@ package body neorv32_package is
     return res_v;
   end function print_version_f;
 
+  -- Check if signal matches binary pattern (skip elements compared with '-') ---------------
+  -- -------------------------------------------------------------------------------------------
+  function match_f(input : std_ulogic_vector; pattern : std_ulogic_vector) return boolean is
+    variable match_v : boolean;
+  begin
+    if (input'length /= pattern'length) then
+      report "[NEORV32] match_f: input and pattern have different sizes!" severity error;
+      return false;
+    else
+      match_v := true;
+      for i in input'length-1 downto 0 loop
+        if (pattern(i) = '1') or (pattern(i) = '0') then -- valid pattern value, skip everything else
+          match_v := match_v and boolean(pattern(i) = input(i));
+        end if;
+      end loop;
+      return match_v;
+    end if;
+  end function match_f;
+
 end neorv32_package;