/*?-----------------------------------------------------------------------?*
?*
?*???Copyright?1996-2018?The?NASM?Authors?-?All?Rights?Reserved
?*???See?the?file?AUTHORS?included?with?the?NASM?distribution?for
?*???the?specific?copyright?holders.
?*
?*???Redistribution?and?use?in?source?and?binary?forms?with?or?without
?*???modification?are?permitted?provided?that?the?following
?*???conditions?are?met:
?*
?*???*?Redistributions?of?source?code?must?retain?the?above?copyright
?*?????notice?this?list?of?conditions?and?the?following?disclaimer.
?*???*?Redistributions?in?binary?form?must?reproduce?the?above
?*?????copyright?notice?this?list?of?conditions?and?the?following
?*?????disclaimer?in?the?documentation?and/or?other?materials?provided
?*?????with?the?distribution.
?*
?*?????THIS?SOFTWARE?IS?PROVIDED?BY?THE?COPYRIGHT?HOLDERS?AND
?*?????CONTRIBUTORS?“AS?IS“?AND?ANY?EXPRESS?OR?IMPLIED?WARRANTIES
?*?????INCLUDING?BUT?NOT?LIMITED?TO?THE?IMPLIED?WARRANTIES?OF
?*?????MERCHANTABILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE?ARE
?*?????DISCLAIMED.?IN?NO?EVENT?SHALL?THE?COPYRIGHT?OWNER?OR
?*?????CONTRIBUTORS?BE?LIABLE?FOR?ANY?DIRECT?INDIRECT?INCIDENTAL
?*?????SPECIAL?EXEMPLARY?OR?CONSEQUENTIAL?DAMAGES?（INCLUDING?BUT
?*?????NOT?LIMITED?TO?PROCUREMENT?OF?SUBSTITUTE?GOODS?OR?SERVICES;
?*?????LOSS?OF?USE?DATA?OR?PROFITS;?OR?BUSINESS?INTERRUPTION）
?*?????HOWEVER?CAUSED?AND?ON?ANY?THEORY?OF?LIABILITY?WHETHER?IN
?*?????CONTRACT?STRICT?LIABILITY?OR?TORT?（INCLUDING?NEGLIGENCE?OR
?*?????OTHERWISE）?ARISING?IN?ANY?WAY?OUT?OF?THE?USE?OF?THIS?SOFTWARE
?*?????EVEN?IF?ADVISED?OF?THE?POSSIBILITY?OF?SUCH?DAMAGE.
?*
?*?-----------------------------------------------------------------------?*/

/*
?*?assemble.c???code?generation?for?the?Netwide?Assembler
?*
?*?Bytecode?specification
?*?----------------------
?*
?*
?*?Codes????????????Mnemonic????????Explanation
?*
?*?\0???????????????????????????????????????terminates?the?code.?（Unless?it‘s?a?literal?of?course.）
?*?\1..\4???????????????????????????????????that?many?literal?bytes?follow?in?the?code?stream
?*?\5???????????????????????????????????????add?4?to?the?primary?operand?number?（b?low?octdigit）
?*?\6???????????????????????????????????????add?4?to?the?secondary?operand?number?（a?middle?octdigit）
?*?\7???????????????????????????????????????add?4?to?both?the?primary?and?the?secondary?operand?number
?*?\10..\13?????????????????????????????????a?literal?byte?follows?in?the?code?stream?to?be?added
?*??????????????????????????????????????????to?the?register?value?of?operand?0..3
?*?\14..\17?????????????????????????????????the?position?of?index?register?operand?in?MIB?（BND?insns）
?*?\20..\23?????????ib??????????????????????a?byte?immediate?operand?from?operand?0..3
?*?\24..\27?????????ibu????????????????????a?zero-extended?byte?immediate?operand?from?operand?0..3
?*?\30..\33?????????iw??????????????????????a?word?immediate?operand?from?operand?0..3
?*?\34..\37?????????iwd?????????????????????select?betwe