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libhwy: disable RVV

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It will not work on processors that lack the V extension until runtime
dispatch is implemented: https://github.com/google/highway/issues/838
This commit is contained in:
Francesco Gazzetta 2024-01-24 10:20:23 +01:00
parent b7b2023ee5
commit 0e6d821272
1 changed files with 15 additions and 0 deletions
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15
pkgs/development/libraries/libhwy/default.nix
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@ -4,6 +4,7 @@
, ninja
, gtest
, fetchFromGitHub
, fetchpatch
}:
stdenv.mkDerivation rec {
@ -17,6 +18,15 @@ stdenv.mkDerivation rec {
hash = "sha256-Z+mAR9nSAbCskUvo6oK79Yd85bu0HtI2aR5THS1EozM=";
};
patches = lib.optional stdenv.hostPlatform.isRiscV
# Adds CMake option HWY_CMAKE_RVV
# https://github.com/google/highway/pull/1743
(fetchpatch {
name = "libhwy-add-rvv-optout.patch";
url = "https://github.com/google/highway/commit/5d58d233fbcec0c6a39df8186a877329147324b3.patch";
hash = "sha256-ileSNYddOt1F5rooRB0fXT20WkVlnG+gP5w7qJdBuww=";
});
nativeBuildInputs = [ cmake ninja ];
# Required for case-insensitive filesystems ("BUILD" exists)
@ -43,6 +53,11 @@ stdenv.mkDerivation rec {
# HwyMathTestGroup/HwyMathTest.TestAllAtanh/EMU128
# HwyMathTestGroup/HwyMathTest.TestAllLog1p/EMU128
"-DHWY_CMAKE_SSE2=ON"
] ++ lib.optionals stdenv.hostPlatform.isRiscV [
# Runtime dispatch is not implemented https://github.com/google/highway/issues/838
# so tests (and likely normal operation) fail with SIGILL on processors without V.
# Until the issue is resolved, we disable RVV completely.
"-DHWY_CMAKE_RVV=OFF"
];
# hydra's darwin machines run into https://github.com/libjxl/libjxl/issues/408