2 files changed, 70 insertions, 0 deletions
diff --git a/dev-cpp/highway/files/highway-1.0.7-Fix_UB_case_with_signed_overflow.patch b/dev-cpp/highway/files/highway-1.0.7-Fix_UB_case_with_signed_overflow.patch
new file mode 100644
index 000000000000..814d584e8b3a
--- /dev/null
+++ b/dev-cpp/highway/files/highway-1.0.7-Fix_UB_case_with_signed_overflow.patch
@@ -0,0 +1,29 @@
+https://github.com/google/highway/issues/1549
+https://github.com/google/highway/commit/45eea15b5488f3e7a15c2c94ac77bd9e99703203
+
+From 45eea15b5488f3e7a15c2c94ac77bd9e99703203 Mon Sep 17 00:00:00 2001
+From: Mathieu Malaterre <mathieu.malaterre@gmail.com>
+Date: Thu, 5 Oct 2023 08:00:38 +0200
+Subject: [PATCH] Fix UB case with signed overflow, prefer unsigned
+
+Fixes #1549
+
+Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110643
+Suggested-by: Andrew Pinski <pinskia@gcc.gnu.org>
+---
+ hwy/ops/arm_neon-inl.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hwy/ops/arm_neon-inl.h b/hwy/ops/arm_neon-inl.h
+index 7ac7a10c62..97de46be2e 100644
+--- a/hwy/ops/arm_neon-inl.h
++++ b/hwy/ops/arm_neon-inl.h
+@@ -4592,7 +4592,7 @@ HWY_API Mask128<T, N> IsNaN(const Vec128<T, N> v) {
+ template <typename T, size_t N, HWY_IF_FLOAT(T)>
+ HWY_API Mask128<T, N> IsInf(const Vec128<T, N> v) {
+   const DFromV<decltype(v)> d;
+-  const RebindToSigned<decltype(d)> di;
++  const RebindToUnsigned<decltype(d)> di;
+   const VFromD<decltype(di)> vi = BitCast(di, v);
+   // 'Shift left' to clear the sign bit, check for exponent=max and mantissa=0.
+   return RebindMask(d, Eq(Add(vi, vi), Set(di, hwy::MaxExponentTimes2<T>())));
diff --git a/dev-cpp/highway/highway-1.0.7-r1.ebuild b/dev-cpp/highway/highway-1.0.7-r1.ebuild
new file mode 100644
index 000000000000..98f940b6570c
--- /dev/null
+++ b/dev-cpp/highway/highway-1.0.7-r1.ebuild
@@ -0,0 +1,41 @@
+# Copyright 2021-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake-multilib
+
+DESCRIPTION="Performance-portable, length-agnostic SIMD with runtime dispatch"
+HOMEPAGE="https://github.com/google/highway"
+
+if [[ "${PV}" == *9999* ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/google/highway.git"
+else
+	SRC_URI="https://github.com/google/highway/archive/refs/tags/${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="cpu_flags_arm_neon test"
+
+DEPEND="test? ( dev-cpp/gtest[${MULTILIB_USEDEP}] )"
+
+RESTRICT="!test? ( test )"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-1.0.7-Fix_UB_case_with_signed_overflow.patch"
+)
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DHWY_CMAKE_ARM7=$(usex cpu_flags_arm_neon)
+		-DBUILD_TESTING=$(usex test)
+		-DHWY_WARNINGS_ARE_ERRORS=OFF
+	)
+
+	use test && mycmakeargs+=( "-DHWY_SYSTEM_GTEST=ON" )
+
+	cmake_src_configure
+}