sravan/system76-edk2
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1. Updated function headers in all assembly files.

Browse Source 
2. Split x86LowLevel.c into a bunch of C files to make images linked with BaseLib smaller.
3. Fixed a few minor bugs.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1066 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-07-21 08:47:38 +00:00
parent 31a9215c32
commit 3f566587ae
252 changed files with 1840 additions and 2009 deletions
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35
MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.asm
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@@ -26,10 +26,19 @@
EXTERN InternalMathDivRemU64x32:PROC
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; InternalMathDivRemU64x64 (
; IN UINT64 Dividend,
; IN UINT64 Divisor,
; OUT UINT64 *Remainder OPTIONAL
; );
;------------------------------------------------------------------------------
InternalMathDivRemU64x64 PROC
mov ecx, [esp + 16]
test ecx, ecx
jnz _@DivRemU64x64
jnz _@DivRemU64x64 ; call _@DivRemU64x64 if Divisor > 2^32
mov ecx, [esp + 20]
jecxz @F
and dword ptr [ecx + 4], 0
@@ -40,10 +49,10 @@ InternalMathDivRemU64x64 ENDP
_@DivRemU64x64 PROC USES ebx esi edi
mov edx, dword ptr [esp + 20]
mov eax, dword ptr [esp + 16]
mov eax, dword ptr [esp + 16] ; edx:eax <- dividend
mov edi, edx
mov esi, eax
mov ebx, dword ptr [esp + 24]
mov esi, eax ; edi:esi <- dividend
mov ebx, dword ptr [esp + 24] ; ecx:ebx <- divisor
@@:
shr edx, 1
rcr eax, 1
@@ -51,31 +60,31 @@ _@DivRemU64x64 PROC USES ebx esi edi
shr ecx, 1
jnz @B
div ebx
mov ebx, eax
mov ebx, eax ; ebx <- quotient
mov ecx, [esp + 28]
mul dword ptr [esp + 24]
imul ecx, ebx
add edx, ecx
mov ecx, dword ptr [esp + 32]
jc @TooLarge
cmp edi, edx
jc @TooLarge ; product > 2^64
cmp edi, edx ; compare high 32 bits
ja @Correct
jb @TooLarge
jb @TooLarge ; product > dividend
cmp esi, eax
jae @Correct
jae @Correct ; product <= dividend
@TooLarge:
dec ebx
jecxz @Return
dec ebx ; adjust quotient by -1
jecxz @Return ; return if Remainder == NULL
sub eax, dword ptr [esp + 24]
sbb edx, dword ptr [esp + 28]
@Correct:
jecxz @Return
sub esi, eax
sbb edi, edx
sbb edi, edx ; edi:esi <- remainder
mov [ecx], esi
mov [ecx + 4], edi
@Return:
mov eax, ebx
mov eax, ebx ; eax <- quotient
xor edx, edx
ret
_@DivRemU64x64 ENDP