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The assembly syntax is supposed to be upward compatible with that
described in Sections 1.3 and 1.4 of `The Art of Computer
Programming, Volume 1'. Draft versions of those chapters as well as other
MMIX information is located at
http://www-cs-faculty.stanford.edu/~knuth/mmix-news.html.
Most code examples from the mmixal package located there should work
unmodified when assembled and linked as single files, with a few
noteworthy exceptions (see section 8.20.4 Differences to mmixal
).
Before an instruction is emitted, the current location is aligned to the next four-byte boundary. If a label is defined at the beginning of the line, its value will be the aligned value.
In addition to the traditional hex-prefix `0x', a hexadecimal number can also be specified by the prefix character `#'.
After all operands to an MMIX instruction or directive have been specified, the rest of the line is ignored, treated as a comment.
8.20.3.1 Special Characters 8.20.3.2 Symbols 8.20.3.3 Register names Register Names 8.20.3.4 Assembler Directives