On 2016-11-14 00:01:42 +0200, Martin Storsjö wrote: > The subtraction directly on sp is one of the operations that are > allowed in thumb mode. > --- > libavcodec/arm/vp9itxfm_neon.S | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/libavcodec/arm/vp9itxfm_neon.S b/libavcodec/arm/vp9itxfm_neon.S > index cdb43b5..46fd010 100644 > --- a/libavcodec/arm/vp9itxfm_neon.S > +++ b/libavcodec/arm/vp9itxfm_neon.S > @@ -796,10 +796,9 @@ function ff_vp9_\txfm1\()_\txfm2\()_16x16_add_neon, > export=1 > @ Align the stack, allocate a temp buffer > T mov r12, sp > T bic r12, r12, #15 > -T sub r12, r12, #512 > T mov sp, r12 > A bic sp, sp, #15 > -A sub sp, sp, #512 > + sub sp, sp, #512
sub r12, sp, #512 works too and saves the first mov or better T mov r7, sp T bic r7, r7, #15 A bic r7, sp, #15 add r7, r7, #512 sub sp, r7 and restore the stack with add sp, r7 Janne _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
