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https://opencores.org/ocsvn/cpu_lecture/cpu_lecture/trunk
[/] [cpu_lecture/] [trunk/] [src/] [opc_deco.vhd] - Diff between revs 10 and 13
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| Rev 10 |
Rev 13 |
| Line 288... |
Line 288... |
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if (I_OPC(3) = '0') then Q_AMOD <= AMOD_Zq;
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if (I_OPC(3) = '0') then Q_AMOD <= AMOD_Zq;
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else Q_AMOD <= AMOD_Yq;
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else Q_AMOD <= AMOD_Yq;
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end if;
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end if;
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Q_RD_M <= not I_OPC(9); -- '1' if LDD
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if (I_OPC(9) = '0') then -- LDD
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Q_WE_M <= '0' & I_OPC(9); -- "01" if STD
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Q_RD_M <= I_T0 ;
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Q_WE_D <= '0' & not I_T0;
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else -- STD
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Q_WE_M <= '0' & I_OPC(9);
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end if;
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when "100100" => -- 1001 00xx xxxx xxxx
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when "100100" => -- 1001 00xx xxxx xxxx
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Q_IMM <= I_OPC(31 downto 16); -- absolute address for LDS/STS
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Q_IMM <= I_OPC(31 downto 16); -- absolute address for LDS/STS
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if (I_OPC(9) = '0') then -- LDD / POP
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if (I_OPC(9) = '0') then -- LDD / POP
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--
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--
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