as: MIPS autoextend

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1 9.27.7 Directives for extending MIPS 16 bit instructions
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1 By default, MIPS 16 instructions are automatically extended to 32 bits
1 when necessary.  The directive '.set noautoextend' will turn this off.
1 When '.set noautoextend' is in effect, any 32 bit instruction must be
1 explicitly extended with the '.e' modifier (e.g., 'li.e $4,1000').  The
1 directive '.set autoextend' may be used to once again automatically
1 extend instructions when necessary.
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1    This directive is only meaningful when in MIPS 16 mode.  Traditional
1 MIPS assemblers do not support this directive.
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