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__wmmintrin_pclmul.h (2036B) - Raw

      1 /*===---- __wmmintrin_pclmul.h - PCMUL intrinsics ---------------------------===
      2  *
      3  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4  * See https://llvm.org/LICENSE.txt for license information.
      5  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6  *
      7  *===-----------------------------------------------------------------------===
      8  */
      9 
     10 #ifndef __WMMINTRIN_H
     11 #error "Never use <__wmmintrin_pclmul.h> directly; include <wmmintrin.h> instead."
     12 #endif
     13 
     14 #ifndef __WMMINTRIN_PCLMUL_H
     15 #define __WMMINTRIN_PCLMUL_H
     16 
     17 /// Multiplies two 64-bit integer values, which are selected from source
     18 ///    operands using the immediate-value operand. The multiplication is a
     19 ///    carry-less multiplication, and the 128-bit integer product is stored in
     20 ///    the destination.
     21 ///
     22 /// \headerfile <x86intrin.h>
     23 ///
     24 /// \code
     25 /// __m128i _mm_clmulepi64_si128(__m128i X, __m128i Y, const int I);
     26 /// \endcode
     27 ///
     28 /// This intrinsic corresponds to the <c> VPCLMULQDQ </c> instruction.
     29 ///
     30 /// \param X
     31 ///    A 128-bit vector of [2 x i64] containing one of the source operands.
     32 /// \param Y
     33 ///    A 128-bit vector of [2 x i64] containing one of the source operands.
     34 /// \param I
     35 ///    An immediate value specifying which 64-bit values to select from the
     36 ///    operands. Bit 0 is used to select a value from operand \a X, and bit
     37 ///    4 is used to select a value from operand \a Y: \n
     38 ///    Bit[0]=0 indicates that bits[63:0] of operand \a X are used. \n
     39 ///    Bit[0]=1 indicates that bits[127:64] of operand \a X are used. \n
     40 ///    Bit[4]=0 indicates that bits[63:0] of operand \a Y are used. \n
     41 ///    Bit[4]=1 indicates that bits[127:64] of operand \a Y are used.
     42 /// \returns The 128-bit integer vector containing the result of the carry-less
     43 ///    multiplication of the selected 64-bit values.
     44 #define _mm_clmulepi64_si128(X, Y, I) \
     45   ((__m128i)__builtin_ia32_pclmulqdq128((__v2di)(__m128i)(X), \
     46                                         (__v2di)(__m128i)(Y), (char)(I)))
     47 
     48 #endif /* __WMMINTRIN_PCLMUL_H */