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universal.sh: Attempt to fetch SSE2 build on ancient hardware

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Robert Schulze 2022-12-19 10:36:48 +00:00
parent 0162632275
commit 90c2919275
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1 changed files with 15 additions and 3 deletions
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18
docs/_includes/install/universal.sh
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@ -9,14 +9,26 @@ if [ "${OS}" = "Linux" ]
then
if [ "${ARCH}" = "x86_64" -o "${ARCH}" = "amd64" ]
then
DIR="amd64"
# Require at least SSE4.2 (introduced in 2006) but also provide a fallback to SSE2 (introduced in 2000) for older systems. SSE2
# builds are much less tested than SSE 4.2 builds. Hardware w/o SSE2 is unsupported.
HAS_SSE42=$(grep sse4_2 /proc/cpuinfo)
if [ "${HAS_SSE42}" ]
then
DIR="amd64"
else
HAS_SSE2=$(grep sse2 /proc/cpuinfo)
if [ "${HAS_SSE2}" ]
then
DIR="amd64sse2"
fi
fi
elif [ "${ARCH}" = "aarch64" -o "${ARCH}" = "arm64" ]
then
# If the system has >=ARMv8.2 (https://en.wikipedia.org/wiki/AArch64), choose the corresponding build, else fall back to a v8.0
# compat build. Unfortunately, the ARM ISA level cannot be read directly, we need to guess from the "features" in /proc/cpuinfo.
# Also, the flags in /proc/cpuinfo are named differently than the flags passed to the compiler (cmake/cpu_features.cmake).
ARMV82=$(grep -m 1 'Features' /proc/cpuinfo | awk '/asimd/ && /sha1/ && /aes/ && /atomics/ && /lrcpc/')
if [ "${ARMV82}" ]
HAS_ARMV82=$(grep -m 1 'Features' /proc/cpuinfo | awk '/asimd/ && /sha1/ && /aes/ && /atomics/ && /lrcpc/')
if [ "${HAS_ARMV82}" ]
then
DIR="aarch64"
else