It's funny that althougth all sources claim that arm4 code should be
bigger, I just recompiled the HelloWorld example for symbian for thumb
and then for arm4 and the arm4 version is actually a little smaller.
The arm4 executable also crashes when the program is executed =( Let's
hope support for a
"The Thumb code requires 70 % of space of the ARM code.
The Thumb code uses 40 % more instructions than the ARM code.
With 32-bit memory, the ARM code is 40 % faster than the Thumb code.
With 16-bit memory, the Thumb code is 45 % faster than the ARM code.
Thumb code uses 30 % less external m
Even worse. Thumb is completely different instruction set with
different number of registers. Completely new code generator is needed
for thumb.
That is why no Linux Kernel for thumb code exists and thus the new "pure
Thumb" Cortex M processors can't run Linux yet.
-Michael
___
Felipe Monteiro de Carvalho wrote:
Acording to the nokia wiki using thumb would be produce smaller and
faster code on the majority of mobiles, so it may be useful to see of
just for more information:
"The Thumb code requires 70 % of space of the ARM code.
The Thumb code uses 40 % more instru
From: "Daniël Mantione" <[EMAIL PROTECTED]>
Op Wed, 17 Oct 2007, schreef Felipe Monteiro de Carvalho:
> so it may be useful to see of
> we can easely support thumb. Since we always use an external
> assembler
> for arm, I wounder: Wouldn't be supporting arm4/thumb just a
> question
> of switch
Op Wed, 17 Oct 2007, schreef Felipe Monteiro de Carvalho:
> Hello,
>
> I was reading about the difference between arm4 and thumb:
> http://wiki.forum.nokia.com/index.php/ARM4,_ARMI_&_THUMB
>
> Because I noted that all examples for Symbian OS use thumb and fpc
> supports only arm4.
>
> Acordin
Hello,
I was reading about the difference between arm4 and thumb:
http://wiki.forum.nokia.com/index.php/ARM4,_ARMI_&_THUMB
Because I noted that all examples for Symbian OS use thumb and fpc
supports only arm4.
Acording to the nokia wiki using thumb would be produce smaller and
faster code on the
