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Use ebp as frame buffer in DivU64x32. Fix a typo in GetPowerOfTwo.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5532 6f19259b-4bc3-4df7-8a09-765794883524
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qwang12
2008-07-21 05:57:04 +00:00
parent 95770ed8af
commit 0fb90682e7
2 changed files with 11 additions and 6 deletions
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13
EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/DivU64x32.asm
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@@ -56,27 +56,32 @@
;---------------------------------------------------------------------------
DivU64x32 PROC
push ebp
mov ebp, esp
xor edx, edx ; Clear EDX
mov eax, [esp + 8] ; Put high 32 bits of 64-bit dividend in EAX
mov ecx, [esp + 12] ; Put 32 bits divisor in ECX
mov eax, [ebp + 0Ch] ; Put high 32 bits of 64-bit dividend in EAX
mov ecx, [ebp + 10h] ; Put 32 bits divisor in ECX
div ecx ; Dividend Divisor Quoitent...Remainder
; 0:EAX / ECX = EAX EDX
push eax ; Push quoitent in stack
mov eax, [esp + 4] ; Put low 32 bits of 64-bit dividend in EAX
mov eax, [ebp + 8] ; Put low 32 bits of 64-bit dividend in EAX
div ecx ; Leave the REMAINDER in EDX as High 32-bit of new dividend
; Dividend Divisor Quoitent...Remainder
; EDX:EAX / ECX = EAX EDX
mov ecx, [esp + 16] ; Put &REMAINDER to ecx
mov ecx, [ebp + 14h] ; Put &REMAINDER to ecx
jecxz Label1 ; If ecx == 0, no remainder exist, return with quoitent in EDX directly
mov dword ptr [ecx], edx ; Put EDX through REMAINDER pointer in ECX
Label1:
pop edx ; Pop High 32-bit QUOITENT to EDX
pop ebp
ret
DivU64x32 ENDP
END