sync comments.

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / SwapBytes64.S

diff --git a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.S b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.S
index 8c3864d8640fbda03c0e6c272ad6110e138ec6c2..f08177d97b87af64d0d447cbfc3b4d0f061f7290 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.S
+++ b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.S
@@ -31,8 +31,8 @@
 #------------------------------------------------------------------------------
 .globl ASM_PFX(InternalMathSwapBytes64)
 ASM_PFX(InternalMathSwapBytes64):
-    movl    8(%esp), %eax
-    movl    4(%esp), %edx
+    movl    8(%esp), %eax               # eax <- upper 32 bits
+    movl    4(%esp), %edx               # edx <- lower 32 bits
     bswapl  %eax
     bswapl  %edx
     ret