1.Fix .global issue in GAS (EdkT207).

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LRotU64.c

/** @file\r
  64-bit left rotation for Ia32\r
\r
  Copyright (c) 2006, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#if _MSC_EXTENSIONS\r
\r
UINT64\r
EFIAPI\r
InternalMathLRotU64 (\r
  IN      UINT64                    Operand,\r
  IN      UINTN                     Count\r
  )\r
{\r
  _asm {\r
    mov     cl, byte ptr [Count]\r
    mov     edx, dword ptr [Operand + 4]\r
    mov     eax, dword ptr [Operand + 0]\r
    shld    ebx, edx, cl\r
    shld    edx, eax, cl\r
    ror     ebx, cl\r
    shld    eax, ebx, cl\r
    test    cl, 32                      ; Count >= 32?\r
    cmovnz  ecx, eax\r
    cmovnz  eax, edx\r
    cmovnz  edx, ecx\r
  }\r
}\r
\r
#endif\r