Hi Russell,
On 01.07.2014 18:19, Russell King wrote:
> ARMv6 and greater introduced a new instruction ("bx") which can be used
> to return from function calls. Recent CPUs perform better when the
> "bx lr" instruction is used rather than the "mov pc, lr" instruction,
> and this sequence is strong
On Tue, 1 Jul 2014, Will Deacon wrote:
> Hi Mans,
>
> On Tue, Jul 01, 2014 at 06:24:43PM +0100, Måns Rullgård wrote:
> > Russell King - ARM Linux writes:
> > > As you point out, "bx lr" /may/ be treated specially (I've actually been
> >
> > Most, if not all, Cortex-A cores do this according the
Russell King writes:
> ARMv6 and greater introduced a new instruction ("bx") which can be used
> to return from function calls. Recent CPUs perform better when the
> "bx lr" instruction is used rather than the "mov pc, lr" instruction,
> and this sequence is strongly recommended to be used by th
Will Deacon writes:
> Hi Mans,
>
> On Tue, Jul 01, 2014 at 06:24:43PM +0100, Måns Rullgård wrote:
>> Russell King - ARM Linux writes:
>> > As you point out, "bx lr" /may/ be treated specially (I've actually been
>>
>> Most, if not all, Cortex-A cores do this according the public TRMs.
>> They a
On 07/01/2014 10:19 AM, Russell King wrote:
> ARMv6 and greater introduced a new instruction ("bx") which can be used
> to return from function calls. Recent CPUs perform better when the
> "bx lr" instruction is used rather than the "mov pc, lr" instruction,
> and this sequence is strongly recomme
Hi Mans,
On Tue, Jul 01, 2014 at 06:24:43PM +0100, Måns Rullgård wrote:
> Russell King - ARM Linux writes:
> > As you point out, "bx lr" /may/ be treated specially (I've actually been
>
> Most, if not all, Cortex-A cores do this according the public TRMs.
> They also do the same thing for "mov p
Russell King - ARM Linux writes:
> On Tue, Jul 01, 2014 at 05:42:42PM +0100, Måns Rullgård wrote:
>> Russell King writes:
>>
>> > ARMv6 and greater introduced a new instruction ("bx") which can be used
>> > to return from function calls. Recent CPUs perform better when the
>> > "bx lr" instruc
On Tue, Jul 01, 2014 at 05:42:42PM +0100, Måns Rullgård wrote:
> Russell King writes:
>
> > ARMv6 and greater introduced a new instruction ("bx") which can be used
> > to return from function calls. Recent CPUs perform better when the
> > "bx lr" instruction is used rather than the "mov pc, lr"
Russell King writes:
> ARMv6 and greater introduced a new instruction ("bx") which can be used
> to return from function calls. Recent CPUs perform better when the
> "bx lr" instruction is used rather than the "mov pc, lr" instruction,
> and this sequence is strongly recommended to be used by th
