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[fpgaboy.git] / insn_jp-jpcc.v
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1`ifdef EXECUTE
2 `INSN_JP_imm,`INSN_JPCC_imm: begin
3 case (cycle)
4 0: begin
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5 `EXEC_INC_PC
6 `EXEC_READ(`_PC + 1)
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7 end
8 1: begin
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9 `EXEC_INC_PC
10 `EXEC_READ(`_PC + 1)
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11 end
12 2: begin
5c33c5c0 13 `EXEC_INC_PC
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14 if (!opcode[0]) begin // i.e., JP cc,nn
15 /* We need to check the condition code to bail out. */
16 case (opcode[4:3])
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17 `INSN_cc_NZ: if (`_F[7]) `EXEC_NEWCYCLE
18 `INSN_cc_Z: if (~`_F[7]) `EXEC_NEWCYCLE
19 `INSN_cc_NC: if (`_F[4]) `EXEC_NEWCYCLE
20 `INSN_cc_C: if (~`_F[4]) `EXEC_NEWCYCLE
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21 endcase
22 end
23 end
5c33c5c0 24 3: `EXEC_NEWCYCLE
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25 endcase
26 end
27`endif
28
29`ifdef WRITEBACK
30 `INSN_JP_imm,`INSN_JPCC_imm: begin
31 case (cycle)
32 0: begin /* type F */ end
33 1: tmp <= rdata; // tmp contains newpcl
34 2: tmp2 <= rdata; // tmp2 contains newpch
5c33c5c0 35 3: `_PC <= {tmp2,tmp};
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36 endcase
37 end
38`endif
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