From 3f619478f796eddbba6e39502fe941b285dd97b1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:00:34 +0200 Subject: Adding upstream version 1:10.11.6. Signed-off-by: Daniel Baumann --- mysys/crc32/clang_workaround.h | 87 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 mysys/crc32/clang_workaround.h (limited to 'mysys/crc32/clang_workaround.h') diff --git a/mysys/crc32/clang_workaround.h b/mysys/crc32/clang_workaround.h new file mode 100644 index 00000000..915f7e52 --- /dev/null +++ b/mysys/crc32/clang_workaround.h @@ -0,0 +1,87 @@ +#ifndef CLANG_WORKAROUNDS_H +#define CLANG_WORKAROUNDS_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) +#define __builtin_unpack_vector_1(a) __builtin_unpack_vector ((a), 1) +#else +#define __builtin_unpack_vector_0(a) __builtin_unpack_vector ((a), 1) +#define __builtin_unpack_vector_1(a) __builtin_unpack_vector ((a), 0) +#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 +} + +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 /* vec_xxpermdi */ + +#endif -- cgit v1.2.3