Hi, Can someone take a look at this? My understanding is that the build of x265 on Ubuntu 22.04 on AArch64 is currently broken without this patch.
Thanks, George On Tue, Jul 29, 2025 at 11:38:16AM +0100, George Steed wrote: > When compiling using GNU Binutils version 2.38 (the default on Ubuntu > 22.04), the assembler does not recognise the AArch64 BFC instruction > unless Armv8.2-A is enabled. This causes the scanPosLast_neon function > to fail to compile. This appears to be fixed with GNU Binutils 2.42 (the > default on Ubuntu 24.04). > > The BFC instruction is an alias of BFM, so rewrite it to express with a > BFM instruction instead. This ensures that it compiles even on the older > GNU Binutils version. > --- > source/common/aarch64/pixel-util.S | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/source/common/aarch64/pixel-util.S > b/source/common/aarch64/pixel-util.S > index e2b31e4a1..81cf17c0d 100644 > --- a/source/common/aarch64/pixel-util.S > +++ b/source/common/aarch64/pixel-util.S > @@ -860,7 +860,7 @@ function PFX(scanPosLast_neon) > lsl w13, w13, w6 > lsl w15, w15, w6 > extr w14, w14, w13, #31 > - bfc w15, #31, #1 > + bfm w15, wzr, #1, #0 > cbnz w15, .Loop_spl_1 > .Lpext_end: > strh w14, [x2], #2 > -- > 2.43.0 > > _______________________________________________ > x265-devel mailing list > x265-devel@videolan.org > https://mailman.videolan.org/listinfo/x265-devel _______________________________________________ x265-devel mailing list x265-devel@videolan.org https://mailman.videolan.org/listinfo/x265-devel
