mips.h (GENERATE_MIPS16E): New definition.

mips.h (GENERATE_MIPS16E): New definition.

* config/mips/mips.h (GENERATE_MIPS16E): New definition.
* config/mips/mips.md (zero_extend<SHORT:mode><GPR:mode>2):
Changed expand condition to exclude generating of "and" if
GENERATE_MIPS16E is true.
(*zero_extend<SHORT:mode><GPR:mode>2_mips16e): New pattern for
matching mips16e zeb/zeh.
(*extend<SHORT:mode><GPR:mode>2_mips16e): New pattern for matching
mips16e seb/seh.
(*extend<SHORT:mode><GPR:mode>2): Disable this pattern for
GENERATE_MIPS16E.
* doc/invoke.texi (MIPS Options): Add comment to -mips16
indicating MIPS16e ASE is used if targetting for MIPS32 or MIPS64.

From-SVN: r100979