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[/] [openmsp430/] [trunk/] [fpga/] [xilinx_diligent_s3board/] [rtl/] [verilog/] [openmsp430/] [omsp_alu.v] - Diff between revs 104 and 111

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Rev 104 Rev 111
Line 29... Line 29...
//
//
// *Author(s):
// *Author(s):
//              - Olivier Girard,    olgirard@gmail.com
//              - Olivier Girard,    olgirard@gmail.com
//
//
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// $Rev: 104 $
// $Rev: 111 $
// $LastChangedBy: olivier.girard $
// $LastChangedBy: olivier.girard $
// $LastChangedDate: 2011-03-06 21:02:27 +0100 (Sun, 06 Mar 2011) $
// $LastChangedDate: 2011-05-20 22:39:02 +0200 (Fri, 20 May 2011) $
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
`ifdef OMSP_NO_INCLUDE
`ifdef OMSP_NO_INCLUDE
`else
`else
`include "openMSP430_defines.v"
`include "openMSP430_defines.v"
`endif
`endif
Line 90... Line 90...
   input [3:0] Y;
   input [3:0] Y;
   input       C;
   input       C;
 
 
   reg   [4:0] Z;
   reg   [4:0] Z;
   begin
   begin
      Z = {1'b0,X}+{1'b0,Y}+C;
      Z = {1'b0,X}+{1'b0,Y}+{4'b0,C};
      if (Z<10) bcd_add = Z;
      if (Z<5'd10) bcd_add = Z;
      else      bcd_add = Z+6;
      else         bcd_add = Z+5'd6;
   end
   end
 
 
endfunction
endfunction
 
 
 
 
Line 202... Line 202...
                               inst_alu[`ALU_XOR]   |
                               inst_alu[`ALU_XOR]   |
                               inst_alu[`ALU_SHIFT] |
                               inst_alu[`ALU_SHIFT] |
                               inst_so[`SWPB]       |
                               inst_so[`SWPB]       |
                               inst_so[`SXT]);
                               inst_so[`SXT]);
 
 
wire [16:0] alu_short      = ({16{inst_alu[`ALU_AND]}}   & alu_and)   |
wire [16:0] alu_short      = ({17{inst_alu[`ALU_AND]}}   & alu_and)   |
                             ({16{inst_alu[`ALU_OR]}}    & alu_or)    |
                             ({17{inst_alu[`ALU_OR]}}    & alu_or)    |
                             ({16{inst_alu[`ALU_XOR]}}   & alu_xor)   |
                             ({17{inst_alu[`ALU_XOR]}}   & alu_xor)   |
                             ({16{inst_alu[`ALU_SHIFT]}} & alu_shift) |
                             ({17{inst_alu[`ALU_SHIFT]}} & alu_shift) |
                             ({16{inst_so[`SWPB]}}       & alu_swpb)  |
                             ({17{inst_so[`SWPB]}}       & alu_swpb)  |
                             ({16{inst_so[`SXT]}}        & alu_sxt)   |
                             ({17{inst_so[`SXT]}}        & alu_sxt)   |
                             ({16{alu_short_thro}}       & op_src_in);
                             ({17{alu_short_thro}}       & op_src_in);
 
 
 
 
// ALU output mux
// ALU output mux
wire [16:0] alu_out_nxt    = (inst_so[`IRQ] | dbg_halt_st |
wire [16:0] alu_out_nxt    = (inst_so[`IRQ] | dbg_halt_st |
                              inst_alu[`ALU_ADD]) ? alu_add_inc :
                              inst_alu[`ALU_ADD]) ? alu_add_inc :

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