git.joshuawise.com / fpgaboy.git / blame
| Commit | Line | Data |
|---|---|---|
| e7fe9dc2 JW |
1 | `define INSN_LD_reg_imm16 9'b000xx0001 |
| 2 | ||
| 81358c71 JW |
3 | `ifdef EXECUTE |
| 4 | `INSN_LD_reg_imm16: begin | |
| 5c33c5c0 | 5 | `EXEC_INC_PC |
| 81358c71 | 6 | case (cycle) |
| 5c33c5c0 JW |
7 | 0: `EXEC_READ(`_PC + 1) |
| 8 | 1: `EXEC_READ(`_PC + 1) | |
| 9 | 2: `EXEC_NEWCYCLE | |
| 81358c71 JW |
10 | endcase |
| 11 | end | |
| 12 | `endif | |
| 13 | ||
| 14 | `ifdef WRITEBACK | |
| 15 | `INSN_LD_reg_imm16: begin | |
| 16 | case (cycle) | |
| 17 | 0: begin /* */ end | |
| 18 | 1: begin | |
| 19 | case (opcode[5:4]) | |
| 5c33c5c0 JW |
20 | `INSN_reg16_BC: `_C <= rdata; |
| 21 | `INSN_reg16_DE: `_E <= rdata; | |
| 22 | `INSN_reg16_HL: `_L <= rdata; | |
| 23 | `INSN_reg16_SP: `_SPL <= rdata; | |
| 81358c71 JW |
24 | endcase |
| 25 | end | |
| 26 | 2: begin | |
| 27 | case (opcode[5:4]) | |
| 5c33c5c0 JW |
28 | `INSN_reg16_BC: `_B <= rdata; |
| 29 | `INSN_reg16_DE: `_D <= rdata; | |
| 30 | `INSN_reg16_HL: `_H <= rdata; | |
| 31 | `INSN_reg16_SP: `_SPH <= rdata; | |
| 81358c71 JW |
32 | endcase |
| 33 | end | |
| 34 | endcase | |
| 35 | end | |
| 36 | `endif |