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https://opencores.org/ocsvn/plasma/plasma/trunk
[/] [plasma/] [trunk/] [vhdl/] [mult.vhd] - Diff between revs 390 and 391
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| Rev 390 |
Rev 391 |
| Line 124... |
Line 124... |
when MULT_SIGNED_MULT =>
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when MULT_SIGNED_MULT =>
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mode_reg <= MODE_MULT;
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mode_reg <= MODE_MULT;
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if b(31) = '0' then
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if b(31) = '0' then
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aa_reg <= a;
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aa_reg <= a;
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bb_reg <= b;
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bb_reg <= b;
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sign_reg <= a(31);
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---- Special case of 0x80000000 * negative number
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--elsif a(31) = '1' and (a(30 downto 0) = ZERO(30 downto 0) or
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-- b(30 downto 0) = ZERO(30 downto 0)) then
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-- aa_reg <= a; --convert to unsigned mult
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-- bb_reg <= b;
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-- sign_reg <= '0';
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else
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else
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aa_reg <= a_neg;
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aa_reg <= a_neg;
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bb_reg <= b_neg;
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bb_reg <= b_neg;
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sign_reg <= a_neg(31);
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end if;
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end if;
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sign_reg <= a(31) xor b(31);
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sign2_reg <= '0';
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sign2_reg <= '0';
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upper_reg <= ZERO;
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upper_reg <= ZERO;
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count_reg <= "100000";
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count_reg <= "100000";
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negate_reg <= '0';
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negate_reg <= '0';
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when MULT_DIVIDE =>
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when MULT_DIVIDE =>
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