gcc will recognize the usual rotate idiom: unsigned int rotv(unsigned int x, int c) { return (x << c) | (x >> (32 - c)); } On x86 it emits a r

gcc will recognize the usual rotate idiom: unsigned int rotv(unsigned int x, int c) { return (x << c) | (x >> (32 - c)); } On x86 it emits a rol instruction, for instance.