core/insn_jp-jpcc.v

   1 `define INSN_JP_imm             9'b011000011
   2 `define INSN_JPCC_imm           9'b0110xx010
   3
   4 `ifdef EXECUTE
   5         `INSN_JP_imm,`INSN_JPCC_imm: begin
   6                 case (cycle)
   7                 0:      begin
   8                                 `EXEC_INC_PC
   9                                 `EXEC_READ(`_PC + 1)
  10                         end
  11                 1:      begin
  12                                 `EXEC_INC_PC
  13                                 `EXEC_READ(`_PC + 1)
  14                         end
  15                 2:      begin
  16                                 `EXEC_INC_PC
  17                                 if (!opcode[0]) begin   // i.e., JP cc,nn
  18                                         /* We need to check the condition code to bail out. */
  19                                         case (opcode[4:3])
  20                                         `INSN_cc_NZ:    if (`_F[7]) `EXEC_NEWCYCLE
  21                                         `INSN_cc_Z:     if (~`_F[7]) `EXEC_NEWCYCLE
  22                                         `INSN_cc_NC:    if (`_F[4]) `EXEC_NEWCYCLE
  23                                         `INSN_cc_C:     if (~`_F[4]) `EXEC_NEWCYCLE
  24                                         endcase
  25                                 end
  26                         end
  27                 3:      `EXEC_NEWCYCLE
  28                 endcase
  29         end
  30 `endif
  31
  32 `ifdef WRITEBACK
  33         `INSN_JP_imm,`INSN_JPCC_imm: begin
  34                 case (cycle)
  35                 0:      begin /* type F */ end
  36                 1:      tmp <= rdata;   // tmp contains newpcl
  37                 2:      tmp2 <= rdata;  // tmp2 contains newpch
  38                 3:      `_PC <= {tmp2,tmp};
  39                 endcase
  40         end
  41 `endif