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

Arnd Bergmann
2015-11-22T21:19:51Z

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On Sunday 22 November 2015 20:39:54 Måns Rullgård wrote:
> Arnd Bergmann <arnd@arndb.de> 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

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