From: Tech@SoftByteLabs.com
Subject: Re: pb3.5:asm shl  di,6   why dont it werk?
 
On Tue, 31 Mar 1998 12:12:38 -0500, Krogg
 wrote:
 
>I was testing(for speed) some inline asm code for plotting points to mode
>13h in powerbasic 3.5 and ran in to an error trying the following:
>asm     mov     ax,&ha000
>asm     mov     es,ax
>asm     mov     bx,y%
>asm     mov     di,bx
>asm     xchg    bh,bl
 
>asm     shl     di,6     <------------this line gives error
 
Change it to this...
 
asm	mov	cl, 6
asm	shl	di, cl
 
SHL can only use 1 or CL
 
 
>asm     add     di,bx
>asm     add     di,x%
>asm     mov     al, col?
>asm     mov     [es:di],al
>this is what i get  "Error 497: Assembler syntax error"
>I dunno why it wont work.
>I really wanted to test this code because it uses the shl instead of a
>mul,the shl is supposed to be faster.Can anyone shed some light on this for
>me?
>
>
 
 
 
 
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