clang/lib/Headers/x86gprintrin.h

   1 /*===--------------- x86gprintrin.h - X86 GPR 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 __X86GPRINTRIN_H
  11 #define __X86GPRINTRIN_H
  12
  13 #if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) ||      \
  14     defined(__HRESET__)
  15 #include <hresetintrin.h>
  16 #endif
  17
  18 #if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) ||      \
  19     defined(__UINTR__)
  20 #include <uintrintrin.h>
  21 #endif
  22
  23 #if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) ||      \
  24     defined(__CRC32__)
  25 #include <crc32intrin.h>
  26 #endif
  27
  28 #if defined(__i386__)
  29 #define __FULLBX "ebx"
  30 #define __TMPGPR "eax"
  31 #else
  32 // When in 64-bit target, the 32-bit operands generate a 32-bit result,
  33 // zero-extended to a 64-bit result in the destination general-purpose,
  34 // It means "mov x %ebx" will clobber the higher 32 bits of rbx, so we
  35 // should preserve the 64-bit register rbx.
  36 #define __FULLBX "rbx"
  37 #define __TMPGPR "rax"
  38 #endif
  39
  40 #define __MOVEGPR(__r1, __r2) "mov {%%"__r1 ", %%"__r2 "|"__r2 ", "__r1"};"
  41
  42 #define __SAVE_GPRBX __MOVEGPR(__FULLBX, __TMPGPR)
  43 #define __RESTORE_GPRBX __MOVEGPR(__TMPGPR, __FULLBX)
  44
  45 #define __SSC_MARK(__Tag)                                                      \
  46   __asm__ __volatile__( __SAVE_GPRBX                                           \
  47                        "mov {%0, %%ebx|ebx, %0}; "                             \
  48                        ".byte 0x64, 0x67, 0x90; "                              \
  49                         __RESTORE_GPRBX                                        \
  50                        ::"i"(__Tag)                                            \
  51                        :  __TMPGPR );
  52
  53 #endif /* __X86GPRINTRIN_H */