Opened on 09/01/22 at 08:09:42

Closed on 09/08/22 at 13:45:03

#4712 closed enhancement (fixed)

powerpc: Add AltiVec VRSAVE support

Reported by: Sebastian Huber Owned by: Sebastian Huber
Priority: normal Milestone: 6.1
Component: arch/powerpc Version: 6
Severity: normal Keywords:
Cc: Blocked By:
Blocking:

Description

The VRSAVE feature of the Altivec unit can be used to reduce the amount of Altivec registers which need to be saved/restored during interrupt processing and context switches.

Change History (3)

comment:1 Changed on 09/08/22 at 13:21:34 by Sebastian Huber <sebastian.huber@…>

In be84706/rtems-source-builder:

6: Update GCC 10 and 12

Update #4712.

comment:2 Changed on 09/08/22 at 13:45:01 by Sebastian Huber <sebastian.huber@…>

In d907c22/rtems:

powerpc: Add support for VRSAVE

The VRSAVE feature of the Altivec unit can be used to reduce the amount of
Altivec registers which need to be saved/restored during interrupt processing
and context switches.

In order to use the VRSAVE optimization a corresponding multilib (-mvrsave) is
required, see GCC configuration. The -mvrsave option must be added to the
ABI_FLAGS of the BSP.

Currently only the -mcpu=e6500 based QorIQ BSP support this optimization.

Update #4712.

comment:3 Changed on 09/08/22 at 13:45:03 by Sebastian Huber <sebastian.huber@…>

Resolution: → fixed
Status: assigned → closed

In 52d566c/rtems:

bsp/qoriq: Enable VRSAVE optimization

Close #4712.

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