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//
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//
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// *Author(s):
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// *Author(s):
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// - Olivier Girard, olgirard@gmail.com
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// - Olivier Girard, olgirard@gmail.com
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//
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//
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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// $Rev: 37 $
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// $Rev: 103 $
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// $LastChangedBy: olivier.girard $
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// $LastChangedBy: olivier.girard $
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// $LastChangedDate: 2009-12-29 21:58:14 +0100 (Tue, 29 Dec 2009) $
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// $LastChangedDate: 2011-03-05 15:44:48 +0100 (Sat, 05 Mar 2011) $
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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`include "timescale.v"
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`ifdef OMSP_NO_INCLUDE
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`else
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`include "openMSP430_defines.v"
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`include "openMSP430_defines.v"
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`endif
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module omsp_alu (
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module omsp_alu (
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// OUTPUTs
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// OUTPUTs
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alu_out, // ALU output value
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alu_out, // ALU output value
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wire [15:0] op_src_inv = {16{op_src_inv_cmd}} ^ op_src;
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wire [15:0] op_src_inv = {16{op_src_inv_cmd}} ^ op_src;
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// Mask the bit 8 for the Byte instructions for correct flags generation
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// Mask the bit 8 for the Byte instructions for correct flags generation
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wire op_bit8_msk = ~exec_cycle | ~inst_bw;
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wire op_bit8_msk = ~exec_cycle | ~inst_bw;
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wire [16:0] op_src_in = {1'b0, op_src_inv[15:9], op_src_inv[8] & op_bit8_msk, op_src_inv[7:0]};
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wire [16:0] op_src_in = {1'b0, {op_src_inv[15:8] & {8{op_bit8_msk}}}, op_src_inv[7:0]};
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wire [16:0] op_dst_in = {1'b0, op_dst[15:9], op_dst[8] & op_bit8_msk, op_dst[7:0]};
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wire [16:0] op_dst_in = {1'b0, {op_dst[15:8] & {8{op_bit8_msk}}}, op_dst[7:0]};
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// Clear the source operand (= jump offset) for conditional jumps
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// Clear the source operand (= jump offset) for conditional jumps
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wire jmp_not_taken = (inst_jmp[`JL] & ~(status[3]^status[2])) |
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wire jmp_not_taken = (inst_jmp[`JL] & ~(status[3]^status[2])) |
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(inst_jmp[`JGE] & (status[3]^status[2])) |
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(inst_jmp[`JGE] & (status[3]^status[2])) |
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(inst_jmp[`JN] & ~status[2]) |
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(inst_jmp[`JN] & ~status[2]) |
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assign alu_stat_wr = (inst_alu[`ALU_STAT_F] & exec_cycle) ? 4'b1111 : 4'b0000;
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assign alu_stat_wr = (inst_alu[`ALU_STAT_F] & exec_cycle) ? 4'b1111 : 4'b0000;
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endmodule // omsp_alu
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endmodule // omsp_alu
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`ifdef OMSP_NO_INCLUDE
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`else
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`include "openMSP430_undefines.v"
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`include "openMSP430_undefines.v"
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`endif
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No newline at end of file
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No newline at end of file
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