Hi,
On 08/05/2020 06:40 PM, Segher Boessenkool wrote:
Hi!
On Wed, Aug 05, 2020 at 04:40:16PM +, Christophe Leroy wrote:
It cannot optimise it because it does not know shift < 32. The code
below is incorrect for shift equal to 32, fwiw.
Is there a way to tell it ?
Sure, for example the
Hi!
On Wed, Aug 05, 2020 at 06:51:44PM +0200, Christophe Leroy wrote:
> Le 05/08/2020 à 16:03, Segher Boessenkool a écrit :
> >On Wed, Aug 05, 2020 at 07:09:23AM +, Christophe Leroy wrote:
> >>+/*
> >>+ * The macros sets two stack frames, one for the caller and one for the
> >>callee
> >>+ *
Hi!
On Wed, Aug 05, 2020 at 04:40:16PM +, Christophe Leroy wrote:
> >It cannot optimise it because it does not know shift < 32. The code
> >below is incorrect for shift equal to 32, fwiw.
>
> Is there a way to tell it ?
Sure, for example the &31 should work (but it doesn't, with the GCC
ver
Hi Again,
Le 05/08/2020 à 16:03, Segher Boessenkool a écrit :
Hi!
On Wed, Aug 05, 2020 at 07:09:23AM +, Christophe Leroy wrote:
+/*
+ * The macros sets two stack frames, one for the caller and one for the callee
+ * because there are no requirement for the caller to set a stack frame when
Hi,
On 08/05/2020 02:03 PM, Segher Boessenkool wrote:
Hi!
On Wed, Aug 05, 2020 at 07:09:23AM +, Christophe Leroy wrote:
+/*
+ * powerpc specific delta calculation.
+ *
+ * This variant removes the masking of the subtraction because the
+ * clocksource mask of all VDSO capable clocksources
Hi!
On Wed, Aug 05, 2020 at 07:09:23AM +, Christophe Leroy wrote:
> Provide vdso_shift_ns(), as the generic x >> s gives the following
> bad result:
>
> 18: 35 25 ff e0 addic. r9,r5,-32
> 1c: 41 80 00 10 blt 2c
> 20: 7c 64 4c 30 srw r4,r3,r9
> 24: 38 60 00 00
Prepare for switching VDSO to generic C implementation in following
patch. Here, we:
- Prepare the helpers to call the C VDSO functions
- Prepare the required callbacks for the C VDSO functions
- Prepare the clocksource.h files to define VDSO_ARCH_CLOCKMODES
- Add the C trampolines to the generic C
