| | 1 | `define INSN_PUSH_reg 9'b011xx0101 |
| | 2 | |
| | 3 | `ifdef EXECUTE |
| | 4 | `INSN_PUSH_reg: begin /* PUSH is 16 cycles! */ |
| | 5 | case (cycle) |
| | 6 | 0: case (opcode[5:4]) |
| | 7 | `INSN_stack_AF: `EXEC_WRITE(`_SP - 1, `_A) |
| | 8 | `INSN_stack_BC: `EXEC_WRITE(`_SP - 1, `_B) |
| | 9 | `INSN_stack_DE: `EXEC_WRITE(`_SP - 1, `_D) |
| | 10 | `INSN_stack_HL: `EXEC_WRITE(`_SP - 1, `_H) |
| | 11 | endcase |
| | 12 | 1: case (opcode[5:4]) |
| | 13 | `INSN_stack_AF: `EXEC_WRITE(`_SP - 2, `_F) |
| | 14 | `INSN_stack_BC: `EXEC_WRITE(`_SP - 2, `_C) |
| | 15 | `INSN_stack_DE: `EXEC_WRITE(`_SP - 2, `_E) |
| | 16 | `INSN_stack_HL: `EXEC_WRITE(`_SP - 2, `_L) |
| | 17 | endcase |
| | 18 | 2: begin /* Twiddle thumbs. */ end |
| | 19 | 3: begin |
| | 20 | `EXEC_NEWCYCLE |
| | 21 | `EXEC_INC_PC |
| | 22 | end |
| | 23 | endcase |
| | 24 | end |
| | 25 | `endif |
| | 26 | |
| | 27 | `ifdef WRITEBACK |
| | 28 | `INSN_PUSH_reg: begin /* PUSH is 16 cycles! */ |
| | 29 | case (cycle) |
| | 30 | 0: begin /* type F */ end |
| | 31 | 1: begin /* type F */ end |
| | 32 | 2: begin /* type F */ end |
| | 33 | 3: `_SP <= `_SP - 2; |
| | 34 | endcase |
| | 35 | end |
| | 36 | `endif |
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