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[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_RET_near.txt] - Rev 2
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<defines>`define CMD_RET_near #AUTOGEN_NEXT_CMD// glob_param_2 --> eip`define CMDEX_RET_near 4'd0`define CMDEX_RET_near_imm 4'd1`define CMDEX_RET_near_LAST 4'd2</defines><decode>(dec_ready_one && decoder[7:0] == 8'hC3) || (dec_ready_one_two && decoder[7:0] == 8'hC2)`CMD_RET_nearIF(decoder[0] == 1'b0); SET(dec_cmdex, `CMDEX_RET_near_imm); ELSE(); SET(dec_cmdex, `CMDEX_RET_near); ENDIF();IF(decoder[0] == 1'b0); SET(consume_one_two); ELSE(); SET(consume_one); ENDIF();SET(dec_is_complex);</decode><microcode>IF(`CMDEX_RET_near_imm);LAST(`CMDEX_RET_near_LAST);ENDIF();IF(`CMDEX_RET_near);LAST(`CMDEX_RET_near_LAST);ENDIF();</microcode><read>IF(rd_cmd == `CMD_RET_near && rd_cmdex != `CMDEX_RET_near_LAST);SET(address_stack_pop);// waiting for esp in 'address_ready'SET(rd_glob_param_2_set);SET(rd_glob_param_2_value, (rd_operand_16bit)? { 16'd0, read_4[15:0] } : read_4);SET(rd_req_esp);IF(rd_mutex_busy_memory); SET(rd_waiting);ELSE();SET(read_virtual);IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();ENDIF();ENDIF();</read><execute>IF(exe_cmd == `CMD_RET_near && exe_cmdex != `CMDEX_RET_near_LAST);IF(exe_cmdex == `CMDEX_RET_near);SET(offset_pop);ENDIF();IF(exe_cmdex == `CMDEX_RET_near_imm);SET(offset_ret);ENDIF();SET(exe_eip_from_glob_param_2);IF(glob_param_2 > cs_limit);SET(exe_waiting);SET(exe_trigger_gp_fault); //exception GP(0)ENDIF();ENDIF();</execute><write>IF(wr_cmd == `CMD_RET_near && wr_cmdex != `CMDEX_RET_near_LAST);SAVE(esp, wr_stack_esp);SET(wr_req_reset_pr);SET(wr_req_reset_dec);SET(wr_req_reset_micro);SET(wr_req_reset_rd);SET(wr_req_reset_exe);ENDIF();</write>
