1 files changed, 141 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifo.asm b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifo.asm
new file mode 100644
index 000000000000..729880d62914
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifo.asm
@@ -0,0 +1,141 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+;
+; This program and the accompanying materials are licensed and made available
+; under the terms and conditions of the BSD License which accompanies this
+; distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+
+    .586P
+    .model  flat,C
+    .code
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoReadFifo8 (
+;    IN  UINTN                 Port,
+;    IN  UINTN                 Size,
+;    OUT VOID                  *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoReadFifo8 PROC
+    push    edi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     edi, [esp + 16]
+rep insb
+    pop     edi
+    ret
+IoReadFifo8 ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoReadFifo16 (
+;    IN  UINTN                 Port,
+;    IN  UINTN                 Size,
+;    OUT VOID                  *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoReadFifo16 PROC
+    push    edi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     edi, [esp + 16]
+rep insw
+    pop     edi
+    ret
+IoReadFifo16 ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoReadFifo32 (
+;    IN  UINTN                 Port,
+;    IN  UINTN                 Size,
+;    OUT VOID                  *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoReadFifo32 PROC
+    push    edi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     edi, [esp + 16]
+rep insd
+    pop     edi
+    ret
+IoReadFifo32 ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoWriteFifo8 (
+;    IN UINTN                  Port,
+;    IN UINTN                  Size,
+;    IN VOID                   *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoWriteFifo8 PROC
+    push    esi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     esi, [esp + 16]
+rep outsb
+    pop     esi
+    ret
+IoWriteFifo8 ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoWriteFifo16 (
+;    IN UINTN                  Port,
+;    IN UINTN                  Size,
+;    IN VOID                   *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoWriteFifo16 PROC
+    push    esi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     esi, [esp + 16]
+rep outsw
+    pop     esi
+    ret
+IoWriteFifo16 ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  EFIAPI
+;  IoWriteFifo32 (
+;    IN UINTN                  Port,
+;    IN UINTN                  Size,
+;    IN VOID                   *Buffer
+;    );
+;------------------------------------------------------------------------------
+IoWriteFifo32 PROC
+    push    esi
+    cld
+    mov     dx, [esp + 8]
+    mov     ecx, [esp + 12]
+    mov     esi, [esp + 16]
+rep outsd
+    pop     esi
+    ret
+IoWriteFifo32 ENDP
+
+    END
+