git.joshuawise.com / fpgaboy.git / blame_incremental
| Commit | Line | Data |
|---|---|---|
| 1 | `define INSN_RST 9'b011xxx111 | |
| 2 | ||
| 3 | `ifdef EXECUTE | |
| 4 | `INSN_RST: begin | |
| 5 | case (cycle) | |
| 6 | 0: `EXEC_INC_PC // This goes FIRST in RST | |
| 7 | 1: `EXEC_WRITE(`_SP - 1, `_PCH) | |
| 8 | 2: `EXEC_WRITE(`_SP - 2, `_PCL) | |
| 9 | 3: begin | |
| 10 | `EXEC_NEWCYCLE | |
| 11 | `_PC <= {10'b0,opcode[5:3],3'b0}; | |
| 12 | end | |
| 13 | endcase | |
| 14 | end | |
| 15 | `endif | |
| 16 | ||
| 17 | `ifdef WRITEBACK | |
| 18 | `INSN_RST: begin | |
| 19 | case (cycle) | |
| 20 | 0: begin /* type F */ end | |
| 21 | 1: begin /* type F */ end | |
| 22 | 2: begin /* type F */ end | |
| 23 | 3: `_SP <= `_SP - 2; | |
| 24 | endcase | |
| 25 | end | |
| 26 | `endif |