clang/lib/Headers/crc32intrin.h

   1 /*===---- crc32intrin.h - SSE4.2 Accumulate CRC32 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 __CRC32INTRIN_H
  11 #define __CRC32INTRIN_H
  12
  13 #define __DEFAULT_FN_ATTRS                                                     \
  14   __attribute__((__always_inline__, __nodebug__, __target__("crc32")))
  15
  16 /// Adds the unsigned integer operand to the CRC-32C checksum of the
  17 ///    unsigned char operand.
  18 ///
  19 /// \headerfile <x86intrin.h>
  20 ///
  21 /// This intrinsic corresponds to the <c> CRC32B </c> instruction.
  22 ///
  23 /// \param __C
  24 ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  25 ///    \a  __D.
  26 /// \param __D
  27 ///    An unsigned 8-bit integer operand used to compute the CRC-32C checksum.
  28 /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  29 ///    operand \a __D.
  30 static __inline__ unsigned int __DEFAULT_FN_ATTRS
  31 _mm_crc32_u8(unsigned int __C, unsigned char __D)
  32 {
  33   return __builtin_ia32_crc32qi(__C, __D);
  34 }
  35
  36 /// Adds the unsigned integer operand to the CRC-32C checksum of the
  37 ///    unsigned short operand.
  38 ///
  39 /// \headerfile <x86intrin.h>
  40 ///
  41 /// This intrinsic corresponds to the <c> CRC32W </c> instruction.
  42 ///
  43 /// \param __C
  44 ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  45 ///    \a __D.
  46 /// \param __D
  47 ///    An unsigned 16-bit integer operand used to compute the CRC-32C checksum.
  48 /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  49 ///    operand \a __D.
  50 static __inline__ unsigned int __DEFAULT_FN_ATTRS
  51 _mm_crc32_u16(unsigned int __C, unsigned short __D)
  52 {
  53   return __builtin_ia32_crc32hi(__C, __D);
  54 }
  55
  56 /// Adds the first unsigned integer operand to the CRC-32C checksum of
  57 ///    the second unsigned integer operand.
  58 ///
  59 /// \headerfile <x86intrin.h>
  60 ///
  61 /// This intrinsic corresponds to the <c> CRC32L </c> instruction.
  62 ///
  63 /// \param __C
  64 ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  65 ///    \a __D.
  66 /// \param __D
  67 ///    An unsigned 32-bit integer operand used to compute the CRC-32C checksum.
  68 /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  69 ///    operand \a __D.
  70 static __inline__ unsigned int __DEFAULT_FN_ATTRS
  71 _mm_crc32_u32(unsigned int __C, unsigned int __D)
  72 {
  73   return __builtin_ia32_crc32si(__C, __D);
  74 }
  75
  76 #ifdef __x86_64__
  77 /// Adds the unsigned integer operand to the CRC-32C checksum of the
  78 ///    unsigned 64-bit integer operand.
  79 ///
  80 /// \headerfile <x86intrin.h>
  81 ///
  82 /// This intrinsic corresponds to the <c> CRC32Q </c> instruction.
  83 ///
  84 /// \param __C
  85 ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  86 ///    \a __D.
  87 /// \param __D
  88 ///    An unsigned 64-bit integer operand used to compute the CRC-32C checksum.
  89 /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  90 ///    operand \a __D.
  91 static __inline__ unsigned long long __DEFAULT_FN_ATTRS
  92 _mm_crc32_u64(unsigned long long __C, unsigned long long __D)
  93 {
  94   return __builtin_ia32_crc32di(__C, __D);
  95 }
  96 #endif /* __x86_64__ */
  97
  98 #undef __DEFAULT_FN_ATTRS
  99
 100 #endif /* __CRC32INTRIN_H */