Hi,
x86 is little-endian
ARM can be little or big endian, like mips processor,
This config is done by hardware
Stephane
On Thu, Jul 08, 2004 at 12:30:56PM +0530,
amith <amith@multitech.co.in> wrote:
> Hi all ,
> a little off-topic.
>
> #include<stdio.h>
> #include<string.h>
>
> typedef struct test
> {
> unsigned short w1;
> unsigned short w2;
> }Test;
>
> Test t1;
>
> unsigned long temp = 0x12345678;
>
> main()
> {
> printf(" sizeof(Test) = %d\n",sizeof(Test));
> memcpy(&t1,&temp,4);
> printf(" t1.w1 = %X \n",t1.w1);
> printf(" t1.w2 = %X \n",t1.w2);
> printf(" &t1.w1 = %X \n",&t1.w1);
> printf(" t1.w2 = %X \n",&t1.w2);
> }
>
> output:
> t1.w1 = 5678
> t1.w1 = 1234
> &t1.w1 = 6004
> &t1.w1 = 6006
>
>
> i tried the above code on x86 and ARM , both gave me the same results.
> Both x86 and ARM are little-endian , or arent they? . Could someone
> explain this result with respect to the definition of Little Endian .
> which goes (one of them) as :
> Little Endian: the least significant byte of a multi-byte data field is
> stored in the lowest memmory address.
>
> Now, i have a couple of doubts :
> 1) i read somewhere on the net, that a processor can be set to either
> Little endian or Big endian, configurable ?
> 2) Could someone explain this with respect to the Little Endian
> definition given above.
>
>
> 6004 6006
> _________________
> | 5678 | 1234 |
> |________|________ |
> t1.w1 t1.w2
>
> Any good links to the Endianess would be great.
>
> thanks.
>
> cheers,
> Amith
>
>
>
>
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive: http://mail.nl.linux.org/kernelnewbies/
> FAQ: http://kernelnewbies.org/faq/
>
>
--
Stephane List
http://slist.lilotux.net
--
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