decode2: Minor cleanup

Remove unused variable is_reg in decode_input_reg_a.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

diff --git a/decode2.vhdl b/decode2.vhdl
index 8a2d97084cc323bcb65d78cc516a83fbdb85ffc3..f6f71017896f66f3ad9ed579375bc5396fac9cc3 100644 (file)
--- a/decode2.vhdl
+++ b/decode2.vhdl
@@ -60,10 +60,7 @@ architecture behaviour of decode2 is
        function decode_input_reg_a (t : input_reg_a_t; insn_in : std_ulogic_vector(31 downto 0);
                                     reg_data : std_ulogic_vector(63 downto 0);
                                     ispr : gspr_index_t) return decode_input_reg_t is
-               variable is_reg : std_ulogic;
        begin
-               is_reg := '0' when insn_ra(insn_in) = "00000" else '1';
-
                if t = RA or (t = RA_OR_ZERO and insn_ra(insn_in) /= "00000") then
                    assert is_fast_spr(ispr) = '0' report "Decode A says GPR but ISPR says SPR:" &
                        to_hstring(ispr) severity failure;