core/insn_ldm8_a.v

   1 // If opcode[4], then ld A, x, else ld x, A
   2 // If opcode[1], then ld 16m8, else ld 8m8
   3
   4 `ifdef EXECUTE
   5         `INSN_LD8M_A: begin
   6                 case (cycle)
   7                 0:      begin
   8                                 `EXEC_INC_PC
   9                                 `EXEC_READ(`_PC + 16'h0001)
  10                         end
  11                 1:      if (opcode[4])  // LD A,x
  12                                 `EXEC_READ(({8'hFF, rdata}))
  13                         else
  14                                 `EXEC_WRITE(({8'hFF, rdata}), `_A)
  15                 2:      begin
  16                                 `EXEC_NEWCYCLE
  17                                 `EXEC_INC_PC
  18                         end
  19                 endcase
  20         end
  21 `endif
  22
  23 `ifdef WRITEBACK
  24         `INSN_LD8M_A: begin
  25                 case (cycle)
  26                 0:      begin end
  27                 1:      begin end
  28                 2:      if (opcode[4]) `_A <= rdata;
  29                 endcase
  30         end
  31 `endif
  32