1. Updated function headers in all assembly files.

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / ReadPmc.asm

diff --git a/MdePkg/Library/BaseLib/X64/ReadPmc.asm b/MdePkg/Library/BaseLib/X64/ReadPmc.asm
index b5004d6f342d1666ed9f6018d7f161d2496a0cbf..5ca60fa85f677a8318fee0b364bfdf6a8f457ec7 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/ReadPmc.asm
+++ b/MdePkg/Library/BaseLib/X64/ReadPmc.asm
@@ -32,11 +32,8 @@
 ;------------------------------------------------------------------------------\r
 AsmReadPmc  PROC\r
     rdpmc\r
-    shl     ecx, 1\r
-    jnc     @F\r
-    shl     rax, 20h\r
-    shrd    rax, rdx, 20h\r
-@@:\r
+    shl     rdx, 20h\r
+    or      rax, rdx\r
     ret\r
 AsmReadPmc  ENDP\r
 \r