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small optimization

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git-svn-id: svn://kolibrios.org@1229 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Alexey Teplov ( 2009-10-23 17:35:26 +00:00
parent 778c4291b7
commit 9aef4d69df
3 changed files with 33 additions and 25 deletions
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11
kernel/trunk/detect/biosdisk.inc
View File

@ -55,7 +55,8 @@ bdds:
inc ax inc ax
cmp word [si], 170h cmp word [si], 170h
jz @f jz @f
mov ax, -1 or ax,-1
; mov ax, -1
@@: @@:
stosw stosw
pop ds pop ds
@ -63,10 +64,14 @@ bdds:
bddl: bddl:
mov al, dl mov al, dl
stosb stosb
mov al, 0 xor ax,ax
stosb stosb
mov ax, -1 dec ax
stosw stosw
; mov al, 0
; stosb
; mov ax, -1
; stosw
bddc2: bddc2:
cmp cl, [es:0x475] cmp cl, [es:0x475]
jae bdde jae bdde

4
kernel/trunk/detect/dev_fd.inc
View File

@ -24,7 +24,7 @@ $Revision$
mov cx,0xff mov cx,0xff
wait_cmos: wait_cmos:
dec cx dec cx
cmp cx,0 test cx,cx
jne wait_cmos jnz wait_cmos
in al,0x71 in al,0x71
mov [DRIVE_DATA],al mov [DRIVE_DATA],al

39
kernel/trunk/fs/fat12.inc
View File

@ -88,26 +88,29 @@ fr_do_1:
shl ecx,9 shl ecx,9
cld cld
rep movsb rep movsb
mov eax,0 ; ok read xor eax,eax
mov ebx,0 xor ebx,ebx
mov [flp_status],0 ; mov eax,0 ; ok read
; mov ebx,0
mov [flp_status],eax
ret ret
fdc_status_error_1: fdc_status_error_1:
mov [flp_status],0 xor eax,eax
mov [flp_status],eax
mov eax,10 mov eax,10
mov ebx,-1 or ebx,-1
ret ret
fr_noroot_1: fr_noroot_1:
sub esp,32 sub esp,32
call expand_filename call expand_filename
frfloppy_1: frfloppy_1:
cmp ebx,0 test ebx,ebx
jne frfl5_1 jnz frfl5_1
mov ebx,1 mov ebx,1
frfl5_1: frfl5_1:
cmp ecx,0 test ecx,ecx
jne frfl6_1 jnz frfl6_1
mov ecx,1 mov ecx,1
frfl6_1: frfl6_1:
dec ebx dec ebx
@ -137,14 +140,14 @@ l.21_1:
add ecx,21 add ecx,21
add edi, ecx ;Advance to next entry add edi, ecx ;Advance to next entry
dec dl dec dl
cmp dl,0 test dl,dl
jne l.21_1 jnz l.21_1
dec dh dec dh
cmp dh,0 test dh,dh
jne l.20_1 jnz l.20_1
fdc_status_error_3: fdc_status_error_3:
mov eax,5 ; file not found ? mov eax,5 ; file not found ?
mov ebx,-1 or ebx,-1
add esp,32+28 add esp,32+28
mov [flp_status],0 mov [flp_status],0
ret ret
@ -232,8 +235,8 @@ frnoread_1:
add esp,4 add esp,4
pop ebx ; ebx <- eax : size of file pop ebx ; ebx <- eax : size of file
add esp,36 add esp,36
mov eax,0 xor eax,eax
mov [flp_status],0 mov [flp_status],eax
ret ret
fdc_status_error_5: fdc_status_error_5:
@ -499,8 +502,8 @@ calculate_chs:
div ebx div ebx
mov [FDD_Track],al mov [FDD_Track],al
mov [FDD_Head],0 mov [FDD_Head],0
cmp edx,0 test edx,edx
je no_head_2 jz no_head_2
inc [FDD_Head] inc [FDD_Head]
no_head_2: no_head_2:
mov dl,[old_track] mov dl,[old_track]