MultU64x32.c

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UINT64
EFIAPI
InternalMathMultU64x32 (
  IN      UINT64  Multiplicand,
  IN      UINT32  Multiplier
  )
{
  _asm {
    mov     ecx, Multiplier
    mov     eax, ecx
    imul    ecx, dword ptr [Multiplicand + 4]  // overflow not detectable
    mul     dword ptr [Multiplicand + 0]
    add     edx, ecx
  }
}