[PowerPC] Implement Elliptic Curve Cryptography Builtins (#184681) Add support for the following ISA Future elliptic curve cryptograpy builtins. * Builtins with immediate parameters: vector unsigned char __builtin_xxmulmul(vector unsigned char, vector unsigned char, unsigned int); vector unsigned char __builtin_xxmulmulhiadd(vector unsigned char, vector unsigned char, unsigned int, unsigned int, unsigned int); vector unsigned char __builtin_xxmulmulloadd(vector unsigned char, vector unsigned char, unsigned int, unsigned int); vector unsigned char __builtin_xxssumudm(vector unsigned char, vector unsigned char, unsigned int); vector unsigned char __builtin_xxssumudmc(vector unsigned char, vector unsigned char, unsigned int); vector unsigned char __builtin_xxssumudmcext(vector unsigned char, vector unsigned char, vector unsigned char, unsigned int); * Builtins with two vector parameters (no immediates): vector unsigned char __builtin_xsaddadduqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsaddaddsuqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsaddsubuqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsaddsubsuqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsmerge2t1uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsmerge2t2uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsmerge2t3uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsmerge3t1uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase2t1uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase2t2uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase2t3uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase2t4uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase3t1uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase3t2uqm(vector unsigned char, vector unsigned char); vector unsigned char __builtin_xsrebase3t3uqm(vector unsigned char, vector unsigned char); Assisted by AI.
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