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typedef signed int signed16 __attribute__ ((__mode__ (__HI__))); typedef unsigned int unsigned16 __attribute__ ((__mode__ (__HI__))); typedef signed16 HI; typedef unsigned16 UHI; unsigned short f(int y) { HI tmp_b4; tmp_b4 = y; UHI opval; if (tmp_b4 == -32768) opval = 32767; else opval = -tmp_b4; return opval; }