Finish splitting out functions.
[fpgaboy.git] / 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
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