24 lines
351 B
ArmAsm
24 lines
351 B
ArmAsm
|
! inl() - Input one dword Author: Kees J. Bot
|
||
|
|
! 18 Mar 1996
|
||
|
|
! unsigned inl(U16_t port);
|
||
|
|
|
||
|
|
o32 = 0x66
|
||
|
|
|
||
|
|
.sect .text
|
||
|
|
.define _inl
|
||
|
|
_inl:
|
||
|
|
push bp
|
||
|
|
mov bp, sp
|
||
|
|
pushf
|
||
|
|
cli ! eax is not interrupt safe
|
||
|
|
mov dx, 4(bp) ! port
|
||
|
|
.data1 o32
|
||
|
|
in dx ! read 1 dword
|
||
|
|
.data1 o32
|
||
|
|
push ax ! push eax
|
||
|
|
pop ax
|
||
|
|
pop dx ! dx:ax = eax
|
||
|
|
popf
|
||
|
|
pop bp
|
||
|
|
ret
|