Re: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions

[Arnd Bergmann]

On Sunday 22 November 2015 20:39:54 Måns Rullgård wrote:
> Arnd Bergmann <arnd@xxxxxxxx> writes:
> 
> > arnd@wuerfel:/tmp$ arm-linux-gnueabihf-gcc -Wall -O2 -mcpu=cortex-a15 idiv.c -c -o idiv-arm.o
> > arnd@wuerfel:/tmp$ objdump -dr idiv-arm.o   
> >
> > idiv-arm.o:     file format elf32-littlearm
> >
> > Disassembly of section .text:
> >
> > 00000000 <udiv>:
> >    0:   fbb0 f0f1       udiv    r0, r0, r1
> >    4:   4770            bx      lr
> >    6:   bf00            nop
> >
> > 00000008 <sdiv>:
> >    8:   fb90 f0f1       sdiv    r0, r0, r1
> >    c:   4770            bx      lr
> >    e:   bf00            nop
> 
> Your compiler seems to default to thumb so you should add -marm.
> 

Sorry about that.

	Arnd

arnd@wuerfel:/tmp$ arm-linux-gnueabihf-gcc -Wall -O2 -mcpu=cortex-a15 idiv.c -c -o idiv-arm.o -marm
arnd@wuerfel:/tmp$ objdump -dr idiv-arm.o 

idiv-arm.o:     file format elf32-littlearm


Disassembly of section .text:

00000000 <udiv>:
   0:   e730f110        udiv    r0, r0, r1
   4:   e12fff1e        bx      lr

00000008 <sdiv>:
   8:   e710f110        sdiv    r0, r0, r1
   c:   e12fff1e        bx      lr

Attachment: idiv-arm.o
Description: application/object