[openwrt/openwrt] tools: libdeflate: backport fix for AVX-VNNI

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/2116073f981ead48f5fe0af213cbdfe013288fb9

commit 2116073f981ead48f5fe0af213cbdfe013288fb9
Author: Robert Marko <robimarko at gmail.com>
AuthorDate: Mon Apr 15 11:03:08 2024 +0200

    tools: libdeflate: backport fix for AVX-VNNI
    
    Trying to compile with new new enough GCC but older binutils that dont
    support AVX-VNNI will error out on the assembler, so backport an upstream
    fix for it.
    
    Fixes: 338b463e1e97 ("tools: libdeflate: update to 1.20")
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 tools/libdeflate/Makefile                          |  2 +-
 ...ncrease-AVX-VNNI-gcc-prerequisite-to-12.1.patch | 32 ++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/tools/libdeflate/Makefile b/tools/libdeflate/Makefile
index 68f7fb1372..6bf25d134d 100644
--- a/tools/libdeflate/Makefile
+++ b/tools/libdeflate/Makefile
@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libdeflate
 PKG_VERSION:=1.20
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/ebiggers/libdeflate/releases/download/v$(PKG_VERSION)
diff --git a/tools/libdeflate/patches/0001-lib-x86-increase-AVX-VNNI-gcc-prerequisite-to-12.1.patch b/tools/libdeflate/patches/0001-lib-x86-increase-AVX-VNNI-gcc-prerequisite-to-12.1.patch
new file mode 100644
index 0000000000..ea4f4dc4c1
--- /dev/null
+++ b/tools/libdeflate/patches/0001-lib-x86-increase-AVX-VNNI-gcc-prerequisite-to-12.1.patch
@@ -0,0 +1,32 @@
+From e522b1d09d3536ddc15459b4259150f4a53ee65a Mon Sep 17 00:00:00 2001
+From: Eric Biggers <ebiggers at google.com>
+Date: Thu, 4 Apr 2024 20:16:33 -0400
+Subject: [PATCH] lib/x86: increase AVX-VNNI gcc prerequisite to 12.1
+
+Although gcc 11.1 supports AVX-VNNI, a popular distro pairs it with a
+binutils version that does not.  Require gcc 12 instead.
+
+Resolves https://github.com/ebiggers/libdeflate/issues/365
+---
+ lib/x86/adler32_impl.h | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+--- a/lib/x86/adler32_impl.h
++++ b/lib/x86/adler32_impl.h
+@@ -52,8 +52,15 @@
+ /*
+  * AVX-VNNI implementation.  This is used on CPUs that have AVX2 and AVX-VNNI
+  * but don't have AVX-512, for example Intel Alder Lake.
++ *
++ * Unusually for a new CPU feature, gcc added support for the AVX-VNNI
++ * intrinsics (in gcc 11.1) slightly before binutils added support for
++ * assembling AVX-VNNI instructions (in binutils 2.36).  Distros can reasonably
++ * have gcc 11 with binutils 2.35.  Because of this issue, we check for gcc 12
++ * instead of gcc 11.  (libdeflate supports direct compilation without a
++ * configure step, so checking the binutils version is not always an option.)
+  */
+-#if GCC_PREREQ(11, 1) || CLANG_PREREQ(12, 0, 13000000) || MSVC_PREREQ(1930)
++#if GCC_PREREQ(12, 1) || CLANG_PREREQ(12, 0, 13000000) || MSVC_PREREQ(1930)
+ #  define adler32_x86_avx2_vnni	adler32_x86_avx2_vnni
+ #  define SUFFIX			   _avx2_vnni
+ #  define ATTRIBUTES		_target_attribute("avx2,avxvnni")