`ifdef EXECUTE `INSN_RST: begin case (cycle) 0: begin `EXEC_INC_PC; // This goes FIRST in RST end 1: begin wr <= 1; address <= {registers[`REG_SPH],registers[`REG_SPL]}-1; wdata <= registers[`REG_PCH]; end 2: begin wr <= 1; address <= {registers[`REG_SPH],registers[`REG_SPL]}-2; wdata <= registers[`REG_PCL]; end 3: begin `EXEC_NEWCYCLE; {registers[`REG_PCH],registers[`REG_PCL]} <= {10'b0,opcode[5:3],3'b0}; end endcase end `endif `ifdef WRITEBACK `INSN_RST: begin case (cycle) 0: begin /* type F */ end 1: begin /* type F */ end 2: begin /* type F */ end 3: {registers[`REG_SPH],registers[`REG_SPL]} <= {registers[`REG_SPH],registers[`REG_SPL]}-2; endcase end `endif