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constant shift_right_unsigned : shift_function_type := "10";
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constant shift_right_unsigned : shift_function_type := "10";
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-- type mult_function_type is (
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-- type mult_function_type is (
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-- mult_nothing, mult_read_lo, mult_read_hi, mult_write_lo,
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-- mult_nothing, mult_read_lo, mult_read_hi, mult_write_lo,
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-- mult_write_hi, mult_mult, mult_divide, mult_signed_divide);
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-- mult_write_hi, mult_mult, mult_divide, mult_signed_divide);
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subtype mult_function_type is std_logic_vector(2 downto 0);
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subtype mult_function_type is std_logic_vector(3 downto 0);
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constant mult_nothing : mult_function_type := "000";
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constant mult_nothing : mult_function_type := "0000";
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constant mult_read_lo : mult_function_type := "001";
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constant mult_read_lo : mult_function_type := "0001";
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constant mult_read_hi : mult_function_type := "010";
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constant mult_read_hi : mult_function_type := "0010";
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constant mult_write_lo : mult_function_type := "011";
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constant mult_write_lo : mult_function_type := "0011";
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constant mult_write_hi : mult_function_type := "100";
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constant mult_write_hi : mult_function_type := "0100";
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constant mult_mult : mult_function_type := "101";
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constant mult_mult : mult_function_type := "0101";
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constant mult_divide : mult_function_type := "110";
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constant mult_signed_mult : mult_function_type := "0110";
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constant mult_signed_divide : mult_function_type := "111";
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constant mult_divide : mult_function_type := "0111";
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constant mult_signed_divide : mult_function_type := "1000";
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-- type a_source_type is (from_reg_source, from_imm10_6);
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-- type a_source_type is (from_reg_source, from_imm10_6);
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subtype a_source_type is std_logic_vector(1 downto 0);
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subtype a_source_type is std_logic_vector(1 downto 0);
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constant a_from_reg_source : a_source_type := "00";
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constant a_from_reg_source : a_source_type := "00";
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constant a_from_imm10_6 : a_source_type := "01";
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constant a_from_imm10_6 : a_source_type := "01";
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