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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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// AltOR32
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// AltOR32
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// Alternative Lightweight OpenRisc
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// Alternative Lightweight OpenRisc
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// V2.0
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// V2.1
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// Ultra-Embedded.com
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// Ultra-Embedded.com
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// Copyright 2011 - 2013
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// Copyright 2011 - 2014
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//
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//
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// Email: admin@ultra-embedded.com
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// Email: admin@ultra-embedded.com
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//
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//
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// License: LGPL
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// License: LGPL
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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// Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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// Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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// Boston, MA 02111-1307 USA
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// Boston, MA 02111-1307 USA
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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// Includes
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//-----------------------------------------------------------------
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`include "altor32_defs.v"
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//-----------------------------------------------------------------
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// Module - ALU
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// Module - ALU
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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module altor32_alu
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module altor32_alu
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(
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(
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// ALU operation select
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// ALU operation select
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// Result
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// Result
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output [31:0] p_o /*verilator public*/,
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output [31:0] p_o /*verilator public*/,
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// Carry
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// Carry
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output reg c_o /*verilator public*/,
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output reg c_o /*verilator public*/,
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output reg c_update_o /*verilator public*/
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output reg c_update_o /*verilator public*/,
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// Comparison
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output reg equal_o /*verilator public*/,
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output reg greater_than_signed_o /*verilator public*/,
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output reg greater_than_o /*verilator public*/,
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output reg less_than_signed_o /*verilator public*/,
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output reg less_than_o /*verilator public*/,
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output flag_update_o /*verilator public*/
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);
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);
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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// Includes
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//-----------------------------------------------------------------
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`include "altor32_defs.v"
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`include "altor32_funcs.v"
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//-----------------------------------------------------------------
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// Registers
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// Registers
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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reg [31:0] result;
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reg [31:0] result;
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reg [31:16] shift_right_fill;
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reg [31:16] shift_right_fill;
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endcase
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endcase
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end
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end
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assign p_o = result;
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assign p_o = result;
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//-----------------------------------------------------------------
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// Comparisons
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//-----------------------------------------------------------------
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always @ *
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begin
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if (a_i == b_i)
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equal_o = 1'b1;
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else
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equal_o = 1'b0;
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if (a_i < b_i)
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less_than_o = 1'b1;
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else
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less_than_o = 1'b0;
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if (a_i > b_i)
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greater_than_o = 1'b1;
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else
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greater_than_o = 1'b0;
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less_than_signed_o = less_than_signed(a_i, b_i);
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greater_than_signed_o = ~(less_than_signed_o | equal_o);
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end
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assign flag_update_o = (op_i == `ALU_COMPARE);
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endmodule
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endmodule
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