gcc/:
	* config/bfin/bfin.c (bdesc_2arg): Add mulhisill, mulhisilh,
	mulhisihl and mulhisihh builtins.

gcc/testsuite/:
	* gcc.target/bfin/hisilh.c: New file.
	* gcc.target/bfin/hisilh-O0.c: New file.

From-SVN: r141312