ArmPkg/ArmDisassemblerLib: fix check for MSR instruction

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

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
; 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
; Module Name:\r
;\r
;   DivError.asm\r
;\r
; Abstract:\r
;\r
;   Set error flag for all division functions\r
;\r
;------------------------------------------------------------------------------\r
\r
    SECTION .text\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; InternalMathDivRemU64x32 (\r
;   IN      UINT64                    Dividend,\r
;   IN      UINT32                    Divisor,\r
;   OUT     UINT32                    *Remainder\r
;   );\r
;------------------------------------------------------------------------------\r
global ASM_PFX(InternalMathDivRemU64x32)\r
ASM_PFX(InternalMathDivRemU64x32):\r
    mov     ecx, [esp + 12]         ; ecx <- divisor\r
    mov     eax, [esp + 8]          ; eax <- dividend[32..63]\r
    xor     edx, edx\r
    div     ecx                     ; eax <- quotient[32..63], edx <- remainder\r
    push    eax\r
    mov     eax, [esp + 8]          ; eax <- dividend[0..31]\r
    div     ecx                     ; eax <- quotient[0..31]\r
    mov     ecx, [esp + 20]         ; ecx <- Remainder\r
    jecxz   .0                      ; abandon remainder if Remainder == NULL\r
    mov     [ecx], edx\r
.0:\r
    pop     edx                     ; edx <- quotient[32..63]\r
    ret\r
\r