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#ifndef CLANG_WORKAROUND_H
#define CLANG_WORKAROUND_H
/*
* These stubs fix clang incompatibilities with GCC builtins.
*/
#ifndef __builtin_crypto_vpmsumw
#define __builtin_crypto_vpmsumw __builtin_crypto_vpmsumb
#endif
#ifndef __builtin_crypto_vpmsumd
#define __builtin_crypto_vpmsumd __builtin_crypto_vpmsumb
#endif
static inline __vector unsigned long long __attribute__((overloadable))
vec_ld(int __a, const __vector unsigned long long *__b)
{
return (__vector unsigned long long)__builtin_altivec_lvx(__a, __b);
}
/*
* GCC __builtin_pack_vector_int128 returns a vector __int128_t but Clang does not recognize this
* type. On GCC this builtin is translated to a xxpermdi instruction that only moves the registers
* __a, __b instead generates a load.
*
* Clang has vec_xxpermdi intrinsics. It was implemented in 4.0.0.
*/
static inline __vector unsigned long long
__builtin_pack_vector(unsigned long __a, unsigned long __b)
{
#if defined(__BIG_ENDIAN__)
__vector unsigned long long __v = {__a, __b};
#else
__vector unsigned long long __v = {__b, __a};
#endif
return __v;
}
/*
* Clang 7 changed the behavior of vec_xxpermdi in order to provide the same behavior of GCC. That
* means code adapted to Clang >= 7 does not work on Clang <= 6. So, fallback to
* __builtin_unpack_vector() on Clang <= 6.
*/
#if !defined vec_xxpermdi || __clang_major__ <= 6
static inline unsigned long
__builtin_unpack_vector(__vector unsigned long long __v, int __o)
{
return __v[__o];
}
#if defined(__BIG_ENDIAN__)
#define __builtin_unpack_vector_0(a) __builtin_unpack_vector((a), 0)
#ifndef REFLECT
#define __builtin_unpack_vector_1(a) __builtin_unpack_vector((a), 1)
#endif
#else
#define __builtin_unpack_vector_0(a) __builtin_unpack_vector((a), 1)
#ifndef REFLECT
#define __builtin_unpack_vector_1(a) __builtin_unpack_vector((a), 0)
#endif
#endif
#else
static inline unsigned long
__builtin_unpack_vector_0(__vector unsigned long long __v)
{
#if defined(__BIG_ENDIAN__)
return vec_xxpermdi(__v, __v, 0x0)[0];
#else
return vec_xxpermdi(__v, __v, 0x3)[0];
#endif
}
#ifndef REFLECT
static inline unsigned long
__builtin_unpack_vector_1(__vector unsigned long long __v)
{
#if defined(__BIG_ENDIAN__)
return vec_xxpermdi(__v, __v, 0x3)[0];
#else
return vec_xxpermdi(__v, __v, 0x0)[0];
#endif
}
#endif
#endif /* vec_xxpermdi */
#endif
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