ack/mach/i86/libem/lar2.s

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ArmAsm
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1987-01-08 10:13:48 +00:00
.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
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.define .lar2
.lar2:
! bx, descriptor address
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! ax, index
pop cx
pop dx ! base address
push cx
push si
mov si,dx
sub ax,(bx)
mov cx,4(bx)
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imul cx
add si,ax
sar cx,1
jnb 1f
xorb ah,ah
lodsb
pop si
pop bx
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push ax
jmp bx
1:
pop dx ! saved si
mov ax,4(bx)
pop bx ! return address
sub sp,ax
mov ax,di ! save di
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mov di,sp
rep movs
mov di,ax
mov si,dx
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jmp bx