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