core/insn_jp-jpcc.v

   1 `ifdef EXECUTE
   2         `INSN_JP_imm,`INSN_JPCC_imm: begin
   3                 case (cycle)
   4                 0:      begin
   5                                 `EXEC_INC_PC
   6                                 `EXEC_READ(`_PC + 1)
   7                         end
   8                 1:      begin
   9                                 `EXEC_INC_PC
  10                                 `EXEC_READ(`_PC + 1)
  11                         end
  12                 2:      begin
  13                                 `EXEC_INC_PC
  14                                 if (!opcode[0]) begin   // i.e., JP cc,nn
  15                                         /* We need to check the condition code to bail out. */
  16                                         case (opcode[4:3])
  17                                         `INSN_cc_NZ:    if (`_F[7]) `EXEC_NEWCYCLE
  18                                         `INSN_cc_Z:     if (~`_F[7]) `EXEC_NEWCYCLE
  19                                         `INSN_cc_NC:    if (`_F[4]) `EXEC_NEWCYCLE
  20                                         `INSN_cc_C:     if (~`_F[4]) `EXEC_NEWCYCLE
  21                                         endcase
  22                                 end
  23                         end
  24                 3:      `EXEC_NEWCYCLE
  25                 endcase
  26         end
  27 `endif
  28
  29 `ifdef WRITEBACK
  30         `INSN_JP_imm,`INSN_JPCC_imm: begin
  31                 case (cycle)
  32                 0:      begin /* type F */ end
  33                 1:      tmp <= rdata;   // tmp contains newpcl
  34                 2:      tmp2 <= rdata;  // tmp2 contains newpch
  35                 3:      `_PC <= {tmp2,tmp};
  36                 endcase
  37         end
  38 `endif