core/insn_rst.v

   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