oh well, for the relevant part of asm.php: (not tested)
Code:
'KEYWORDS' => array(
/*CPU*/
1 => array(
'aaa','aad','aam','aas','adc','add','and','call','cbw', 'cflush', 'clc','cld','cli','cmc','cmp',
'cmps','cmpsb','cmpsw','cmpxchg8b','cpuid','cwd','daa','das','dec','div','esc','hlt','idiv','imul','in','inc',
'int','int1','int3','into','iret','ja','jae','jb','jbe','jc','jcxz','je','jg','jge','jl','jle','jmp',
'jna','jnae','jnb','jnbe','jnc','jne','jng','jnge','jnl','jnle','jno','jnp','jns','jnz',
'jo','jp','jpe','jpo','js','jz','lahf','lds','lea','les','lods','lodsb','lodsw','loop',
'loope','loopew','loopne','loopnew','loopnz','loopnzw','loopw','loopz','loopzw','mov',
'movs','movsb','movsw','mul','neg','nop','not','or','out','pop','popf','push','pushf',
'rcl','rcr','ret','retf','retn','rol','ror','sahf','sal','sar','sbb','scas','scasb','scasw',
'shl','shr','stc','std','sti','stos','stosb','stosw','sub','test','wait','xchg','xlat',
'xlatb','xor','bound','enter','ins','insb','insw','leave','outs','outsb','outsw','popa','pusha','pushw',
'arpl','lar','lsl','sgdt','sidt','sldt','smsw','str','verr','verw','clts','lgdt','lidt','lldt','lmsw','ltr',
'bsf','bsr','bt','btc','btr','bts','cdq','cmpsd','cwde','insd','iretd','iretdf','iretf','iretw',
'jecxz','lfs','lgs','lodsd','loopd','looped','loopned','loopnzd','loopzd','lss','movsd',
'movsx','movzx','outsd','popad','popfd','pushad','pushd','pushfd','scasd','seta','setae',
'setb','setbe','setc','sete','setg','setge','setl','setle','setna','setnae','setnb','setnbe',
'setnc','setne','setng','setnge','setnl','setnle','setno','setnp','setns','setnz','seto','setp',
'setpe','setpo','sets','setz','shld','shrd','stosd','bswap','cmpxchg','invd','invlpg','wbinvd','xadd','lock',
'rep','repe','repne','repnz','repz','rdmsr','wrmsr','rdpmc','rdshr','rdtsc','rsdc','rsldt','rsm',
'rsts','salc','smi','smintold','smint','svdc','svldt','svts','pause','syscall','sysenter','sysexit','sysret',
'ud2','umov','xbts','wrshr'
),
/*FPU*/
2 => array(
'f2xm1','fabs','fadd','faddp','fbld','fbstp','fchs','fclex','fcom','fcomp','fcompp','fdecstp',
'fdisi','fdiv','fdivp','fdivr','fdivrp','feni','ffree','fiadd','ficom','ficomp','fidiv',
'fidivr','fild','fimul','fincstp','finit','fist','fistp','fisub','fisubr','fld','fld1',
'fldcw','fldenv','fldenvw','fldl2e','fldl2t','fldlg2','fldln2','fldpi','fldz','fmul',
'fmulp','fnclex','fndisi','fneni','fninit','fnop','fnsave','fnsavew','fnstcw','fnstenv',
'fnstenvw','fnstsw','fpatan','fprem','fptan','frndint','frstor','frstorw','fsave',
'fsavew','fscale','fsqrt','fst','fstcw','fstenv','fstenvw','fstp','fstsw','fsub','fsubp',
'fsubr','fsubrp','ftst','fwait','fxam','fxch','fxtract','fyl2x','fyl2xp1',
'fsetpm','fcos','fldenvd','fnsaved','fnstenvd','fprem1','frstord','fsaved','fsin','fsincos',
'fstenvd','fucom','fucomp','fucompp',
'emms','femms','fxsave','fxrstor'
),
/*registers*/
3 => array(
'ah','al','ax','bh','bl','bp','bx','ch','cl','cr0','cr2','cr3','cs','cx','dh','di','dl',
'dr0','dr1','dr2','dr3','dr6','dr7','ds','dx','eax','ebp','ebx','ecx','edi','edx',
'es','esi','esp','fs','gs','si','sp','ss','st','tr3','tr4','tr5','tr6','tr7',
'rax','rbx','rcx','rdx','rsi','rdi','rbp','rsp','cr8','spl','bpl','sil','dil',
'r8b','r9b','r10b','r11b','r12b','r13b','r14b','r15b',
'r8w','r9w','r10w','r11w','r12w','r13w','r14w','r15w',
'r8d','r9d','r10d','r11d','r12d','r13d','r14d','r15d',
'r8','r9','r10','r11','r12','r13','r14','r15'
),
/*Directive*/
4 => array(
'186','286','286c','286p','287','386','386c','386p','387','486','486p','586','686'
'8086','8087','alpha','break','code','const','continue','cref','data','data?',
'dosseg','else','elseif','endif','endw','err','err1','err2','errb',
'errdef','errdif','errdifi','erre','erridn','erridni','errnb','errndef',
'errnz','exit','fardata','fardata?','if','lall','lfcond','list','listall',
'listif','listmacro','listmacroall',' model','no87','nocref','nolist',
'nolistif','nolistmacro','radix','repeat','sall','seq','sfcond','stack',
'startup','tfcond','type','until','untilcxz','while','xall','xcref',
'xlist','alias','align','assume','catstr','comm','comment','db','dd','df','dq',
'dt','dup','dw','echo','elseif1','elseif2','elseifb','elseifdef','elseifdif',
'elseifdifi','elseife','elseifidn','elseifidni','elseifnb','elseifndef','end',
'endm','endp','ends','eq',' equ','even','exitm','extern','externdef','extrn','for',
'forc','ge','goto','group','high','highword','if1','if2','ifb','ifdef','ifdif',
'ifdifi','ife',' ifidn','ifidni','ifnb','ifndef','include','includelib','instr','invoke',
'irp','irpc','label','le','length','lengthof','local','low','lowword','lroffset',
'macro','mask','mod','msfloat','name','ne','offset','opattr','option','org','%out',
'page','popcontext','private','proc','proto','ptr','public','purge','pushcontext','record',
'rept','seg','segment','short','size','sizeof','sizestr','struc','struct',
'substr','subtitle','subttl','textequ','this','title','typedef','union','width',
'.model', '.stack', '.code', '.data'
),
/*Operands*/
5 => array(
'@b','@f','addr','basic','byte','c','carry?','dword',
'far','far16','fortran','fword','near','near16','overflow?','parity?','pascal','qword',
'real4',' real8','real10','sbyte','sdword','sign?','stdcall','sword','syscall','tbyte',
'vararg','word','zero?','flat','near32','far32',
'abs','all','assumes','at','casemap','common','compact',
'cpu','dotname','emulator','epilogue','error','export','expr16','expr32','farstack',
'forceframe','huge','language','large','listing','ljmp','loadds','m510','medium','memory',
'nearstack','nodotname','noemulator','nokeyword','noljmp','nom510','none','nonunique',
'nooldmacros','nooldstructs','noreadonly','noscoped','nosignextend','nothing',
'notpublic','oldmacros','oldstructs','os_dos','para','prologue',
'readonly','req','scoped','setif2','smallstack','tiny','use16','use32','uses'
)
),
which should add 64 bit support, as well as all non-vector instructions up to the opteron series. (vmx/svm and later extentions are still missing)
at least, its an start