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/* Helper functions to work around issues with clang builtins
* Copyright (C) 2021 IBM Corporation
*
* Authors:
* Daniel Black <daniel@linux.vnet.ibm.com>
* Rogerio Alves <rogealve@br.ibm.com>
* Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
*
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#ifndef POWER_INTRINS_H
#define POWER_INTRINS_H
#include <altivec.h>
#if defined (__clang__)
/*
* 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
#ifdef __VSX__
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);
}
#endif
#endif
/* There's no version of this that operates over unsigned and if casted, it does
* sign extension. Let's write an endian independent version and hope the compiler
* eliminates creating another zero idiom for the zero value if one exists locally */
static inline vector unsigned short vec_unpackl(vector unsigned char a) {
vector unsigned char zero = vec_splat_u8(0);
#if BYTE_ORDER == BIG_ENDIAN
return (vector unsigned short)vec_mergel(zero, a);
#else
return (vector unsigned short)vec_mergel(a, zero);
#endif
}
static inline vector unsigned short vec_unpackh(vector unsigned char a) {
vector unsigned char zero = vec_splat_u8(0);
#if BYTE_ORDER == BIG_ENDIAN
return (vector unsigned short)vec_mergeh(zero, a);
#else
return (vector unsigned short)vec_mergeh(a, zero);
#endif
}
#endif
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