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(as.info)MIPS autoextend

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Directives for extending MIPS 16 bit instructions
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   By default, MIPS 16 instructions are automatically extended to 32
bits when necessary.  The directive `.set noautoextend' will turn this
off.  When `.set noautoextend' is in effect, any 32 bit instruction
must be explicitly extended with the `.e' modifier (e.g., `li.e
$4,1000').  The directive `.set autoextend' may be used to once again
automatically extend instructions when necessary.

   This directive is only meaningful when in MIPS 16 mode.  Traditional
MIPS assemblers do not support this directive.