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_NEXTADDR_PCINC;
   7                                 rd <= 1;
   8                         end
   9                 1:      begin
  10                                 `EXEC_INC_PC;
  11                                 `EXEC_NEXTADDR_PCINC;
  12                                 rd <= 1;
  13                         end
  14                 2:      begin
  15                                 `EXEC_INC_PC;
  16                                 if (!opcode[0]) begin   // i.e., JP cc,nn
  17                                         /* We need to check the condition code to bail out. */
  18                                         case (opcode[4:3])
  19                                         `INSN_cc_NZ:    if (registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end
  20                                         `INSN_cc_Z:     if (~registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end
  21                                         `INSN_cc_NC:    if (registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end
  22                                         `INSN_cc_C:     if (~registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end
  23                                         endcase
  24                                 end
  25                         end
  26                 3:      begin
  27                                 `EXEC_NEWCYCLE;
  28                         end
  29                 endcase
  30         end
  31 `endif
  32
  33 `ifdef WRITEBACK
  34         `INSN_JP_imm,`INSN_JPCC_imm: begin
  35                 case (cycle)
  36                 0:      begin /* type F */ end
  37                 1:      tmp <= rdata;   // tmp contains newpcl
  38                 2:      tmp2 <= rdata;  // tmp2 contains newpch
  39                 3:      {registers[`REG_PCH],registers[`REG_PCL]} <=
  40                                 {tmp2,tmp};
  41                 endcase
  42         end
  43 `endif