]>
Commit | Line | Data |
---|---|---|
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 |