insn_jr-jrcc.v

   1 `ifdef EXECUTE
   2         `INSN_JR_imm,`INSN_JRCC_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                                 if (opcode[5]) begin    // i.e., JP cc,nn
  12                                         /* We need to check the condition code to bail out. */
  13                                         case (opcode[4:3])
  14                                         `INSN_cc_NZ:    if (registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end
  15                                         `INSN_cc_Z:             if (~registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end
  16                                         `INSN_cc_NC:    if (registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end
  17                                         `INSN_cc_C:             if (~registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end
  18                                         endcase
  19                                 end
  20                         end
  21                 2:      begin
  22                                 `EXEC_NEWCYCLE;
  23                         end
  24                 endcase
  25         end
  26 `endif
  27
  28 `ifdef WRITEBACK
  29         `INSN_JR_imm,`INSN_JRCC_imm: begin
  30                 case (cycle)
  31                 0:      begin /* type F */ end
  32                 1:      tmp <= rdata;
  33                 2:      {registers[`REG_PCH],registers[`REG_PCL]} <=
  34                                 {registers[`REG_PCH],registers[`REG_PCL]} +
  35                                 {tmp[7]?8'hFF:8'h00,tmp};
  36                 endcase
  37         end
  38 `endif