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implement a couple mode opcodes

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This commit is contained in:
Raphael Jacquot 2019-02-08 23:59:56 +01:00
parent bb298832ff
commit ccd373243f
1 changed files with 27 additions and 0 deletions
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27
opcodes/Dx_regs_field_A.v Normal file
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/******************************************************************************
* Dx
* register manipulation field A
*
*/
`include "decstates.v"
`DEC_DX: begin
case (nibble)
4'hA: begin
A[19:0] <= C[19:0];
$display("%5h A=C\tA", inst_start_PC);
end
4'hE: begin
A[19:0] <= C[19:0];
C[19:0] <= A[19:0];
$display("%5h ACEX\tA", inst_start_PC);
end
default: begin
$display("ERROR : DEC_DX");
decode_error <= 1;
end
endcase
decstate <= `DEC_START;
end