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+" Vim syntax file
+" Language: GNU Assembler
+" Maintainer: Doug Kearns dougkearns@gmail.com
+" Previous Maintainers: Erik Wognsen <erik.wognsen@gmail.com>
+" Kevin Dahlhausen <kdahlhaus@yahoo.com>
+" Contributors: Ori Avtalion, Lakshay Garg
+" Last Change: 2020 Oct 31
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+syn case ignore
+
+" storage types
+syn match asmType "\.long"
+syn match asmType "\.ascii"
+syn match asmType "\.asciz"
+syn match asmType "\.byte"
+syn match asmType "\.double"
+syn match asmType "\.float"
+syn match asmType "\.hword"
+syn match asmType "\.int"
+syn match asmType "\.octa"
+syn match asmType "\.quad"
+syn match asmType "\.short"
+syn match asmType "\.single"
+syn match asmType "\.space"
+syn match asmType "\.string"
+syn match asmType "\.word"
+
+syn match asmIdentifier "[a-z_][a-z0-9_]*"
+syn match asmLabel "[a-z_][a-z0-9_]*:"he=e-1
+
+" Various #'s as defined by GAS ref manual sec 3.6.2.1
+" Technically, the first asmDecimal def is actually octal,
+" since the value of 0-7 octal is the same as 0-7 decimal,
+" I (Kevin) prefer to map it as decimal:
+syn match asmDecimal "\<0\+[1-7]\=\>" display
+syn match asmDecimal "\<[1-9]\d*\>" display
+syn match asmOctal "\<0[0-7][0-7]\+\>" display
+syn match asmHexadecimal "\<0[xX][0-9a-fA-F]\+\>" display
+syn match asmBinary "\<0[bB][0-1]\+\>" display
+
+syn match asmFloat "\<\d\+\.\d*\%(e[+-]\=\d\+\)\=\>" display
+syn match asmFloat "\.\d\+\%(e[+-]\=\d\+\)\=\>" display
+syn match asmFloat "\<\d\%(e[+-]\=\d\+\)\>" display
+syn match asmFloat "[+-]\=Inf\>\|\<NaN\>" display
+
+syn match asmFloat "\%(0[edfghprs]\)[+-]\=\d*\%(\.\d\+\)\%(e[+-]\=\d\+\)\=" display
+syn match asmFloat "\%(0[edfghprs]\)[+-]\=\d\+\%(\.\d\+\)\=\%(e[+-]\=\d\+\)\=" display
+" Avoid fighting the hexadecimal match for unicorn-like '0x' prefixed floats
+syn match asmFloat "\%(0x\)[+-]\=\d*\%(\.\d\+\)\%(e[+-]\=\d\+\)\=" display
+
+" Allow all characters to be escaped (and in strings) as these vary across
+" architectures [See sec 3.6.1.1 Strings]
+syn match asmCharacterEscape "\\." contained
+syn match asmCharacter "'\\\=." contains=asmCharacterEscape
+
+syn match asmStringEscape "\\\_." contained
+syn match asmStringEscape "\\\%(\o\{3}\|00[89]\)" contained display
+syn match asmStringEscape "\\x\x\+" contained display
+
+syn region asmString start="\"" end="\"" skip="\\\\\|\\\"" contains=asmStringEscape
+
+syn keyword asmTodo contained TODO FIXME XXX NOTE
+
+" GAS supports one type of multi line comments:
+syn region asmComment start="/\*" end="\*/" contains=asmTodo,@Spell
+
+" GAS (undocumentedly?) supports C++ style comments. Unlike in C/C++ however,
+" a backslash ending a C++ style comment does not extend the comment to the
+" next line (hence the syntax region does not define 'skip="\\$"')
+syn region asmComment start="//" end="$" keepend contains=asmTodo,@Spell
+
+" Line comment characters depend on the target architecture and command line
+" options and some comments may double as logical line number directives or
+" preprocessor commands. This situation is described at
+" http://sourceware.org/binutils/docs-2.22/as/Comments.html
+" Some line comment characters have other meanings for other targets. For
+" example, .type directives may use the `@' character which is also an ARM
+" comment marker.
+" As a compromise to accommodate what I arbitrarily assume to be the most
+" frequently used features of the most popular architectures (and also the
+" non-GNU assembly languages that use this syntax file because their asm files
+" are also named *.asm), the following are used as line comment characters:
+syn match asmComment "[#;!|].*" contains=asmTodo,@Spell
+
+" Side effects of this include:
+" - When `;' is used to separate statements on the same line (many targets
+" support this), all statements except the first get highlighted as
+" comments. As a remedy, remove `;' from the above.
+" - ARM comments are not highlighted correctly. For ARM, uncomment the
+" following two lines and comment the one above.
+"syn match asmComment "@.*" contains=asmTodo
+"syn match asmComment "^#.*" contains=asmTodo
+
+" Advanced users of specific architectures will probably want to change the
+" comment highlighting or use a specific, more comprehensive syntax file.
+
+syn match asmInclude "\.include"
+syn match asmCond "\.if"
+syn match asmCond "\.else"
+syn match asmCond "\.endif"
+syn match asmMacro "\.macro"
+syn match asmMacro "\.endm"
+
+" Assembler directives start with a '.' and may contain upper case (e.g.,
+" .ABORT), numbers (e.g., .p2align), dash (e.g., .app-file) and underscore in
+" CFI directives (e.g., .cfi_startproc). This will also match labels starting
+" with '.', including the GCC auto-generated '.L' labels.
+syn match asmDirective "\.[A-Za-z][0-9A-Za-z-_]*"
+
+syn case match
+
+" Define the default highlighting.
+" Only when an item doesn't have highlighting yet
+
+" The default methods for highlighting. Can be overridden later
+hi def link asmSection Special
+hi def link asmLabel Label
+hi def link asmComment Comment
+hi def link asmTodo Todo
+hi def link asmDirective Statement
+
+hi def link asmInclude Include
+hi def link asmCond PreCondit
+hi def link asmMacro Macro
+
+if exists('g:asm_legacy_syntax_groups')
+ hi def link hexNumber Number
+ hi def link decNumber Number
+ hi def link octNumber Number
+ hi def link binNumber Number
+ hi def link asmHexadecimal hexNumber
+ hi def link asmDecimal decNumber
+ hi def link asmOctal octNumber
+ hi def link asmBinary binNumber
+else
+ hi def link asmHexadecimal Number
+ hi def link asmDecimal Number
+ hi def link asmOctal Number
+ hi def link asmBinary Number
+endif
+hi def link asmFloat Float
+
+hi def link asmString String
+hi def link asmStringEscape Special
+hi def link asmCharacter Character
+hi def link asmCharacterEscape Special
+
+hi def link asmIdentifier Identifier
+hi def link asmType Type
+
+let b:current_syntax = "asm"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: nowrap sw=2 sts=2 ts=8 noet