| | 1 | // If opcode[4], then ld A, x, else ld x, A |
| | 2 | // If opcode[1], then ld 16m8, else ld 8m8 |
| | 3 | |
| | 4 | `ifdef EXECUTE |
| | 5 | `INSN_LD16M_A: begin |
| | 6 | case (cycle) |
| | 7 | 0: begin |
| | 8 | `EXEC_INC_PC |
| | 9 | `EXEC_READ(`_PC + 16'h0001) |
| | 10 | end |
| | 11 | 1: begin |
| | 12 | `EXEC_INC_PC // we only hit here if 16m8 |
| | 13 | `EXEC_READ(`_PC + 16'h0001) |
| | 14 | end |
| | 15 | 2: if (opcode[4]) // LD A,x |
| | 16 | `EXEC_READ(({rdata, tmp})) |
| | 17 | else |
| | 18 | `EXEC_WRITE(({rdata, tmp}), `_A) |
| | 19 | 3: begin |
| | 20 | `EXEC_NEWCYCLE |
| | 21 | `EXEC_INC_PC |
| | 22 | end |
| | 23 | endcase |
| | 24 | end |
| | 25 | `endif |
| | 26 | |
| | 27 | `ifdef WRITEBACK |
| | 28 | `INSN_LD16M_A: begin |
| | 29 | case (cycle) |
| | 30 | 0: begin end |
| | 31 | 1: tmp <= rdata; |
| | 32 | 2: begin end |
| | 33 | 3: if (opcode[4]) `_A <= rdata; |
| | 34 | endcase |
| | 35 | end |
| | 36 | `endif |
| | 37 | |
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