Import BaseMemoryLibMmx.

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibMmx / Ia32 / SetMem32.asm

diff --git a/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm
new file mode 100644 (file)
index 0000000..c2e4869
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm
@@ -0,0 +1,59 @@
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2006, Intel Corporation\r
+; All rights reserved. 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
+;   SetMem32.asm\r
+;\r
+; Abstract:\r
+;\r
+;   SetMem32 function\r
+;\r
+; Notes:\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+    .686\r
+    .model  flat,C\r
+    .mmx\r
+    .code\r
+\r
+;------------------------------------------------------------------------------\r
+;  VOID *\r
+;  EFIAPI\r
+;  InternalMemSetMem32 (\r
+;    IN VOID   *Buffer,\r
+;    IN UINTN  Count,\r
+;    IN UINT32 Value\r
+;    );\r
+;------------------------------------------------------------------------------\r
+InternalMemSetMem32 PROC\r
+    mov     eax, [esp + 4]              ; eax <- Buffer as return value\r
+    mov     ecx, [esp + 8]              ; ecx <- Count\r
+    movd    mm0, [esp + 12]             ; mm0 <- Value\r
+    shr     ecx, 1                      ; ecx <- number of qwords to set\r
+    mov     edx, eax                    ; edx <- Buffer\r
+    jz      @SetDwords\r
+    movq    mm1, mm0\r
+    psllq   mm1, 32\r
+    por     mm0, mm1\r
+@@:\r
+    movq    [edx], mm0\r
+    lea     edx, [edx + 8]              ; use "lea" to avoid change in flags\r
+    loop    @B\r
+@SetDwords:\r
+    jnc     @F\r
+    movd    [edx], mm0\r
+@@:\r
+    ret\r
+InternalMemSetMem32 ENDP\r
+\r
+    END\r