core/insn_ldbcde_a.v

   1 `define INSN_LDBCDE_A           9'b0000xx010
   2
   3 `ifdef EXECUTE
   4         `INSN_LDBCDE_A: begin
   5                 case (cycle)
   6                 0:      if (opcode[3]) begin
   7                                 if (opcode[4]) begin `EXEC_READ(`_DE) end
   8                                 else begin `EXEC_READ(`_BC) end
   9                         end else begin
  10                                 if (opcode[4]) begin `EXEC_WRITE(`_DE, `_A) end
  11                                 else begin `EXEC_WRITE(`_BC, `_A) end
  12                         end
  13                 1:      begin
  14                                 `EXEC_INC_PC
  15                                 `EXEC_NEWCYCLE
  16                         end
  17                 endcase
  18         end
  19 `endif
  20
  21 `ifdef WRITEBACK
  22         `INSN_LDBCDE_A: begin
  23                 case (cycle)
  24                 0:      begin end
  25                 1:      if (opcode[3]) `_A <= rdata;
  26                 endcase
  27         end
  28 `endif