commit 451ef531548eee9e17e818c0d28932dd8e79b200
parent 14dbd7896d4985b1b312271e69ac360b24602f5e
Author: Léo Villeveygoux <leo.villeveygoux@etu.u-bordeaux.fr>
Date: Mon, 19 Jun 2017 00:36:53 +0200
test.asm: use edx instead of ebx
ebx would have to be saved and restored, according to calling
conventions, but in that case I can just avoid using it.
Diffstat:
| M | test.asm | | | 54 | +++++++++++++++++++++++++++--------------------------- |
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/test.asm b/test.asm
@@ -28,34 +28,34 @@ f:
; update coords
mov eax, 0
mov al, byte [input]
- mov ebx, [coords]
+ mov edx, [coords]
.check_left:
mov cl, 1b
and cl, al
jz .check_right
- sub bx, 1
+ sub dx, 1
.check_right:
mov cl, 10b
and cl, al
jz .check_up
- add bx, 1
+ add dx, 1
.check_up:
mov cl, 100b
and cl, al
jz .check_down
- sub bx, 0x100
+ sub dx, 0x100
.check_down:
mov cl, 1000b
and cl, al
jz .check_end
- add bx, 0x100
+ add dx, 0x100
.check_end:
- mov [coords], ebx
+ mov [coords], edx
; get color
mov ecx, [coords]
@@ -65,41 +65,41 @@ f:
call colorize
add esp, 2
- mov ebx, [coords]
- mov byte [pix+ebx], al
+ mov edx, [coords]
+ mov byte [pix+edx], al
ret
colorize:
mov al, 0
- mov bx, 0
+ mov dx, 0
mov cx, [esp+4] ; get fun argument
;red part
- mov bl, cl
- and bl, 01110000b
- sal bl, 1
- and bl, 11100000b
- or al, bl
+ mov dl, cl
+ and dl, 01110000b
+ sal dl, 1
+ and dl, 11100000b
+ or al, dl
;green part
- mov bl, ch
- and bl, 01110000b
- sar bl, 1
- sar bl, 1
- and bl, 00011100b
- or al, bl
-
- ;blue part
+ mov dl, ch
+ and dl, 01110000b
+ sar dl, 1
+ sar dl, 1
+ and dl, 00011100b
+ or al, dl
+
+ ;dlue part
and ch, 10000000b
- mov bl, ch
+ mov dl, ch
and cl, 10000000b
sar cl, 1
and cl, 01000000b
- or bl, cl
+ or dl, cl
mov cl, 6
- sar bl, cl
- and bl, 00000011b
- or al, bl
+ sar dl, cl
+ and dl, 00000011b
+ or al, dl
ret
