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[/] [ion/] [trunk/] [vhdl/] [mips_alu.vhdl] - Diff between revs 2 and 82
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| Rev 2 |
Rev 82 |
| Line 59... |
Line 59... |
X"00000000" when "11", -- zero
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X"00000000" when "11", -- zero
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inp2 when others; -- straight
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inp2 when others; -- straight
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sex1 <= inp1(31) when ac.arith_unsigned='0' else '0';
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sex1 <= inp1(31) when ac.arith_unsigned='0' else '0';
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alu_eop1 <= sex1 & inp1;
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alu_eop1 <= sex1 & inp1;
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sex2 <= inp2_neg(31) when ac.arith_unsigned='0' else '0';
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sex2 <= inp2_neg(31) when (ac.arith_unsigned='0' or ac.use_slt='1') else '0';
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alu_eop2 <= sex2 & inp2_neg;
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alu_eop2 <= sex2 & inp2_neg;
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alu_arith <= alu_eop1 + alu_eop2 + ac.cy_in;
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alu_arith <= alu_eop1 + alu_eop2 + ac.cy_in;
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with ac.logic_sel select alu_logic <=
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with ac.logic_sel select alu_logic <=
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inp1 and inp2_neg when "00",
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inp1 and inp2_neg when "00",
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