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bmi2intrin.h
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/*===---- bmi2intrin.h - BMI2 intrinsics -----------------------------------=== * * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. * See https://llvm.org/LICENSE.txt for license information. * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception * *===-----------------------------------------------------------------------=== */ #ifndef __IMMINTRIN_H #error "Never use <bmi2intrin.h> directly; include <immintrin.h> instead." #endif #ifndef __BMI2INTRIN_H #define __BMI2INTRIN_H /* Define the default attributes for the functions in this file. */ #if defined(__cplusplus) && (__cplusplus >= 201103L) #define __DEFAULT_FN_ATTRS \ __attribute__((__always_inline__, __nodebug__, __target__("bmi2"))) constexpr #else #define __DEFAULT_FN_ATTRS \ __attribute__((__always_inline__, __nodebug__, __target__("bmi2"))) #endif /// Copies the unsigned 32-bit integer \a __X and zeroes the upper bits /// starting at bit number \a __Y. /// /// \code{.operation} /// i := __Y[7:0] /// result := __X /// IF i < 32 /// result[31:i] := 0 /// FI /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c BZHI instruction. /// /// \param __X /// The 32-bit source value to copy. /// \param __Y /// The lower 8 bits specify the bit number of the lowest bit to zero. /// \returns The partially zeroed 32-bit value. static __inline__ unsigned int __DEFAULT_FN_ATTRS _bzhi_u32(unsigned int __X, unsigned int __Y) { return __builtin_ia32_bzhi_si(__X, __Y); } /// Deposit (scatter) low-order bits from the unsigned 32-bit integer \a __X /// into the 32-bit result, according to the mask in the unsigned 32-bit /// integer \a __Y. All other bits of the result are zero. /// /// \code{.operation} /// i := 0 /// result := 0 /// FOR m := 0 TO 31 /// IF __Y[m] == 1 /// result[m] := __X[i] /// i := i + 1 /// ENDIF /// ENDFOR /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c PDEP instruction. /// /// \param __X /// The 32-bit source value to copy. /// \param __Y /// The 32-bit mask specifying where to deposit source bits. /// \returns The 32-bit result. static __inline__ unsigned int __DEFAULT_FN_ATTRS _pdep_u32(unsigned int __X, unsigned int __Y) { return __builtin_ia32_pdep_si(__X, __Y); } /// Extract (gather) bits from the unsigned 32-bit integer \a __X into the /// low-order bits of the 32-bit result, according to the mask in the /// unsigned 32-bit integer \a __Y. All other bits of the result are zero. /// /// \code{.operation} /// i := 0 /// result := 0 /// FOR m := 0 TO 31 /// IF __Y[m] == 1 /// result[i] := __X[m] /// i := i + 1 /// ENDIF /// ENDFOR /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c PEXT instruction. /// /// \param __X /// The 32-bit source value to copy. /// \param __Y /// The 32-bit mask specifying which source bits to extract. /// \returns The 32-bit result. static __inline__ unsigned int __DEFAULT_FN_ATTRS _pext_u32(unsigned int __X, unsigned int __Y) { return __builtin_ia32_pext_si(__X, __Y); } /// Multiplies the unsigned 32-bit integers \a __X and \a __Y to form a /// 64-bit product. Stores the upper 32 bits of the product in the /// memory at \a __P and returns the lower 32 bits. /// /// \code{.operation} /// Store32(__P, (__X * __Y)[63:32]) /// result := (__X * __Y)[31:0] /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c MULX instruction. /// /// \param __X /// An unsigned 32-bit multiplicand. /// \param __Y /// An unsigned 32-bit multiplicand. /// \param __P /// A pointer to memory for storing the upper half of the product. /// \returns The lower half of the product. static __inline__ unsigned int __DEFAULT_FN_ATTRS _mulx_u32(unsigned int __X, unsigned int __Y, unsigned int *__P) { unsigned long long __res = (unsigned long long) __X * __Y; *__P = (unsigned int)(__res >> 32); return (unsigned int)__res; } #ifdef __x86_64__ /// Copies the unsigned 64-bit integer \a __X and zeroes the upper bits /// starting at bit number \a __Y. /// /// \code{.operation} /// i := __Y[7:0] /// result := __X /// IF i < 64 /// result[63:i] := 0 /// FI /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c BZHI instruction. /// /// \param __X /// The 64-bit source value to copy. /// \param __Y /// The lower 8 bits specify the bit number of the lowest bit to zero. /// \returns The partially zeroed 64-bit value. static __inline__ unsigned long long __DEFAULT_FN_ATTRS _bzhi_u64(unsigned long long __X, unsigned long long __Y) { return __builtin_ia32_bzhi_di(__X, __Y); } /// Deposit (scatter) low-order bits from the unsigned 64-bit integer \a __X /// into the 64-bit result, according to the mask in the unsigned 64-bit /// integer \a __Y. All other bits of the result are zero. /// /// \code{.operation} /// i := 0 /// result := 0 /// FOR m := 0 TO 63 /// IF __Y[m] == 1 /// result[m] := __X[i] /// i := i + 1 /// ENDIF /// ENDFOR /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c PDEP instruction. /// /// \param __X /// The 64-bit source value to copy. /// \param __Y /// The 64-bit mask specifying where to deposit source bits. /// \returns The 64-bit result. static __inline__ unsigned long long __DEFAULT_FN_ATTRS _pdep_u64(unsigned long long __X, unsigned long long __Y) { return __builtin_ia32_pdep_di(__X, __Y); } /// Extract (gather) bits from the unsigned 64-bit integer \a __X into the /// low-order bits of the 64-bit result, according to the mask in the /// unsigned 64-bit integer \a __Y. All other bits of the result are zero. /// /// \code{.operation} /// i := 0 /// result := 0 /// FOR m := 0 TO 63 /// IF __Y[m] == 1 /// result[i] := __X[m] /// i := i + 1 /// ENDIF /// ENDFOR /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c PEXT instruction. /// /// \param __X /// The 64-bit source value to copy. /// \param __Y /// The 64-bit mask specifying which source bits to extract. /// \returns The 64-bit result. static __inline__ unsigned long long __DEFAULT_FN_ATTRS _pext_u64(unsigned long long __X, unsigned long long __Y) { return __builtin_ia32_pext_di(__X, __Y); } /// Multiplies the unsigned 64-bit integers \a __X and \a __Y to form a /// 128-bit product. Stores the upper 64 bits of the product to the /// memory addressed by \a __P and returns the lower 64 bits. /// /// \code{.operation} /// Store64(__P, (__X * __Y)[127:64]) /// result := (__X * __Y)[63:0] /// \endcode /// /// \headerfile <immintrin.h> /// /// This intrinsic corresponds to the \c MULX instruction. /// /// \param __X /// An unsigned 64-bit multiplicand. /// \param __Y /// An unsigned 64-bit multiplicand. /// \param __P /// A pointer to memory for storing the upper half of the product. /// \returns The lower half of the product. static __inline__ unsigned long long __DEFAULT_FN_ATTRS _mulx_u64 (unsigned long long __X, unsigned long long __Y, unsigned long long *__P) { unsigned __int128 __res = (unsigned __int128) __X * __Y; *__P = (unsigned long long) (__res >> 64); return (unsigned long long) __res; } #endif /* __x86_64__ */ #undef __DEFAULT_FN_ATTRS #endif /* __BMI2INTRIN_H */