Same diff as x265.  There is no make test here, but the code is
largely identical so I'm sure this is necessary here as well.

ok?


Index: multimedia/x264/Makefile
===================================================================
RCS file: /cvs/ports/multimedia/x264/Makefile,v
retrieving revision 1.68
diff -u -p -r1.68 Makefile
--- multimedia/x264/Makefile	17 Jun 2023 22:17:46 -0000	1.68
+++ multimedia/x264/Makefile	19 Feb 2024 23:00:42 -0000
@@ -4,7 +4,7 @@ DISTNAME=	x264-20221028
 GH_ACCOUNT=	mirror
 GH_PROJECT=	x264
 GH_COMMIT=	416e3eb2b52abb0a67e57599aba4f8be3003b36d
-REVISION=	1
+REVISION=	2
 CATEGORIES=	multimedia
 
 SHARED_LIBS=	x264	24.0
Index: multimedia/x264/patches/patch-common_x86_x86inc_asm
===================================================================
RCS file: multimedia/x264/patches/patch-common_x86_x86inc_asm
diff -N multimedia/x264/patches/patch-common_x86_x86inc_asm
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ multimedia/x264/patches/patch-common_x86_x86inc_asm	19 Feb 2024 23:00:42 -0000
@@ -0,0 +1,13 @@
+Index: common/x86/x86inc.asm
+--- common/x86/x86inc.asm.orig
++++ common/x86/x86inc.asm
+@@ -802,6 +802,9 @@ BRANCH_INSTR jz, je, jnz, jne, jl, jle, jnl, jnle, jg,
+     %endif
+     align function_align
+     %2:
++    %if ARCH_X86_64
++        endbr64
++    %endif
+     RESET_MM_PERMUTATION        ; needed for x86-64, also makes disassembly somewhat nicer
+     %xdefine rstk rsp           ; copy of the original stack pointer, used when greater alignment than the known stack alignment is required
+     %assign stack_offset 0      ; stack pointer offset relative to the return address