| Line 228... |
Line 228... |
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p2_rd_mux_control <= p2_ld_upper_hword & p2_ld_upper_byte & p2_rd_addr;
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p2_rd_mux_control <= p2_ld_upper_hword & p2_ld_upper_byte & p2_rd_addr;
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-- Extension for unused bits will be zero or the sign (bit 7 or bit 15)
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-- Extension for unused bits will be zero or the sign (bit 7 or bit 15)
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p2_data_word_ext <= '0' when p2_ld_unsigned='1' else
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p2_data_word_ext <= '0' when p2_ld_unsigned='1' else
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data_rd(15) when p2_ld_upper_byte='1' else
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-- LH
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data_rd(31) when p2_ld_upper_byte='1' and p2_rd_addr="00" else
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data_rd(15) when p2_ld_upper_byte='1' and p2_rd_addr="10" else
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-- LB
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data_rd(7) when p2_rd_addr="11" else
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data_rd(7) when p2_rd_addr="11" else
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data_rd(15) when p2_rd_addr="10" else
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data_rd(15) when p2_rd_addr="10" else
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data_rd(23);
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data_rd(23) when p2_rd_addr="01" else
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data_rd(31);
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-- data_rd(15) when p2_ld_upper_byte='1' else
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-- data_rd(7) when p2_rd_addr="11" else
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-- data_rd(15) when p2_rd_addr="10" else
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-- data_rd(23);
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-- byte 0 may come from any of the 4 bytes of the input word
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-- byte 0 may come from any of the 4 bytes of the input word
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with p2_rd_mux_control select p2_data_word_rd(7 downto 0) <=
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with p2_rd_mux_control select p2_data_word_rd(7 downto 0) <=
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data_rd(31 downto 24) when "0000",
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data_rd(31 downto 24) when "0000",
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data_rd(23 downto 16) when "0001",
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data_rd(23 downto 16) when "0001",
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| Line 644... |
Line 653... |
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p1_ac.use_slt <= '1' when (p1_ir_op="000001" and p1_ir_reg(20 downto 17)="01000") or
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p1_ac.use_slt <= '1' when (p1_ir_op="000001" and p1_ir_reg(20 downto 17)="01000") or
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(p1_ir_op="000000" and p1_ir_reg(5 downto 1)="10101") or
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(p1_ir_op="000000" and p1_ir_reg(5 downto 1)="10101") or
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p1_ir_op="001010" or p1_ir_op="001011"
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p1_ir_op="001010" or p1_ir_op="001011"
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else '0';
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else '0';
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p1_ac.arith_unsigned <= p1_ac.use_slt and p1_ir_reg(0);
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p1_ac.arith_unsigned <= p1_ac.use_slt and (p1_ir_reg(0) or p1_ir_op(26));
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p1_ac.use_logic(0) <= '1' when (p1_op_special='1' and p1_ir_fn(5 downto 3)/="000") or
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p1_ac.use_logic(0) <= '1' when (p1_op_special='1' and p1_ir_fn(5 downto 3)/="000") or
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-- all immediate arith and logic
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-- all immediate arith and logic
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p1_ir_op(31 downto 29)="001"
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p1_ir_op(31 downto 29)="001"
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else '0';
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else '0';
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