OvmfPkg QemuFwCfgLib: Fix broken IA32 Microsoft assembler code

[mirror_edk2.git] / OvmfPkg / Library / QemuFwCfgLib / X64 / IoLibExAsm.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006 - 2012, 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
;------------------------------------------------------------------------------\r
\r
    .code\r
\r
;------------------------------------------------------------------------------\r
;  VOID\r
;  EFIAPI\r
;  IoReadFifo8 (\r
;    IN UINTN                  Port,              // rcx\r
;    IN UINTN                  Size,              // rdx\r
;    IN VOID                   *Buffer            // r8\r
;    );\r
;------------------------------------------------------------------------------\r
IoReadFifo8 PROC\r
\r
    xchg    rcx, rdx\r
    xchg    rdi, r8             ; rdi: buffer address; r8: save rdi\r
rep insb\r
    mov     rdi, r8             ; restore rdi\r
    ret\r
\r
IoReadFifo8 ENDP\r
\r
    END\r
\r