UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / DivU64x32Remainder.c

/** @file\r
  Set error flag for all division functions\r
\r
  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
/**\r
  Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r
  generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.\r
\r
  This function divides the 64-bit unsigned value Dividend by the 32-bit\r
  unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r
  is not NULL, then the 32-bit unsigned remainder is returned in Remainder.\r
  This function returns the 64-bit unsigned quotient.\r
\r
  @param  Dividend  A 64-bit unsigned value.\r
  @param  Divisor   A 32-bit unsigned value.\r
  @param  Remainder A pointer to a 32-bit unsigned value. This parameter is\r
                    optional and may be NULL.\r
\r
  @return Dividend / Divisor\r
\r
**/\r
UINT64\r
EFIAPI\r
InternalMathDivRemU64x32 (\r
  IN      UINT64  Dividend,\r
  IN      UINT32  Divisor,\r
  OUT     UINT32  *Remainder\r
  )\r
{\r
  _asm {\r
    mov     ecx, Divisor\r
    mov     eax, dword ptr [Dividend + 4]\r
    xor     edx, edx\r
    div     ecx\r
    push    eax\r
    mov     eax, dword ptr [Dividend + 0]\r
    div     ecx\r
    mov     ecx, Remainder\r
    jecxz   RemainderNull                      // abandon remainder if Remainder == NULL\r
    mov     [ecx], edx\r
RemainderNull:\r
    pop     edx\r
  }\r
}\r