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The basic built-in functions described in this section areavailable on the PowerPC family of processors starting with ISA 2.05or later. Unless specific options are explicitly disabled on thecommand line, specifying option-mcpu=power7 has the effect ofenabling all the same options as for-mcpu=power6 inaddition to the-maltivec,-mpopcntd, and-mvsx options.
The following basic built-in functions require-mpopcntd:
unsigned int __builtin_addg6s (unsigned int, unsigned int);long long __builtin_bpermd (long long, long long);unsigned int __builtin_cbcdtd (unsigned int);unsigned int __builtin_cdtbcd (unsigned int);long long __builtin_divde (long long, long long);unsigned long long __builtin_divdeu (unsigned long long, unsigned long long);int __builtin_divwe (int, int);unsigned int __builtin_divweu (unsigned int, unsigned int);vector __int128 __builtin_pack_vector_int128 (long long, long long);void __builtin_rs6000_speculation_barrier (void);long long __builtin_unpack_vector_int128 (vector __int128, signed char);
Of these, the__builtin_divde and__builtin_divdeu functionsrequire a 64-bit environment.
The following basic built-in functions, which are also supported onx86 targets, require-mfloat128.
__float128 __builtin_fabsq (__float128);__float128 __builtin_copysignq (__float128, __float128);__float128 __builtin_infq (void);__float128 __builtin_huge_valq (void);__float128 __builtin_nanq (void);__float128 __builtin_nansq (void);__float128 __builtin_sqrtf128 (__float128);__float128 __builtin_fmaf128 (__float128, __float128, __float128);