1. Added comments to ASM files

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / DivU64x32Remainder.asm

diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm b/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
index a836e22d0db671c83f9fae605fe4570c06b2e918..e025b22c2d278fe8869cbffdc15c8abba7090094 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
+++ b/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
@@ -33,18 +33,18 @@
 ;   );\r
 ;------------------------------------------------------------------------------\r
 InternalMathDivRemU64x32    PROC\r
-    mov     ecx, [esp + 12]\r
-    mov     eax, [esp + 8]\r
+    mov     ecx, [esp + 12]         ; ecx <- divisor\r
+    mov     eax, [esp + 8]          ; eax <- dividend[32..63]\r
     xor     edx, edx\r
-    div     ecx\r
+    div     ecx                     ; eax <- quotient[32..63], edx <- remainder\r
     push    eax\r
-    mov     eax, [esp + 8]\r
-    div     ecx\r
-    mov     ecx, [esp + 20]\r
+    mov     eax, [esp + 8]          ; eax <- dividend[0..31]\r
+    div     ecx                     ; eax <- quotient[0..31]\r
+    mov     ecx, [esp + 20]         ; ecx <- Remainder\r
     jecxz   @F                      ; abandon remainder if Remainder == NULL\r
     mov     [ecx], edx\r
 @@:\r
-    pop     edx\r
+    pop     edx                     ; edx <- quotient[32..63]\r
     ret\r
 InternalMathDivRemU64x32    ENDP\r
 \r