diff options
Diffstat (limited to 'tools/libdeflate/patches/0001-lib-x86-increase-AVX-VNNI-gcc-prerequisite-to-12.1.patch')
| -rw-r--r-- | tools/libdeflate/patches/0001-lib-x86-increase-AVX-VNNI-gcc-prerequisite-to-12.1.patch | 32 |
1 files changed, 32 insertions, 0 deletions
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@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") |