diff options
Diffstat (limited to '0011-aarch64-fix-check-for-SVE-support-in-assembler.patch')
| -rw-r--r-- | 0011-aarch64-fix-check-for-SVE-support-in-assembler.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/0011-aarch64-fix-check-for-SVE-support-in-assembler.patch b/0011-aarch64-fix-check-for-SVE-support-in-assembler.patch new file mode 100644 index 0000000..ecc3b27 --- /dev/null +++ b/0011-aarch64-fix-check-for-SVE-support-in-assembler.patch @@ -0,0 +1,61 @@ +From 1bf17ce978da71431dbd1fc3660cfae3dff0672f Mon Sep 17 00:00:00 2001 +From: Szabolcs Nagy <szabolcs.nagy@arm.com> +Date: Wed, 13 Mar 2024 14:34:14 +0000 +Subject: [PATCH 11/26] aarch64: fix check for SVE support in assembler + +Due to GCC bug 110901 -mcpu can override -march setting when compiling +asm code and thus a compiler targetting a specific cpu can fail the +configure check even when binutils gas supports SVE. + +The workaround is that explicit .arch directive overrides both -mcpu +and -march, and since that's what the actual SVE memcpy uses the +configure check should use that too even if the GCC issue is fixed +independently. + +Reviewed-by: Florian Weimer <fweimer@redhat.com> +(cherry picked from commit 73c26018ed0ecd9c807bb363cc2c2ab4aca66a82) +--- + sysdeps/aarch64/configure | 5 +++-- + sysdeps/aarch64/configure.ac | 5 +++-- + 2 files changed, 6 insertions(+), 4 deletions(-) + mode change 100644 => 100755 sysdeps/aarch64/configure + +diff --git a/sysdeps/aarch64/configure b/sysdeps/aarch64/configure +old mode 100644 +new mode 100755 +index ca57edce47..9606137e8d +--- a/sysdeps/aarch64/configure ++++ b/sysdeps/aarch64/configure +@@ -325,9 +325,10 @@ then : + printf %s "(cached) " >&6 + else $as_nop + cat > conftest.s <<\EOF +- ptrue p0.b ++ .arch armv8.2-a+sve ++ ptrue p0.b + EOF +-if { ac_try='${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&5' ++if { ac_try='${CC-cc} -c conftest.s 1>&5' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? +diff --git a/sysdeps/aarch64/configure.ac b/sysdeps/aarch64/configure.ac +index 27874eceb4..56d12d661d 100644 +--- a/sysdeps/aarch64/configure.ac ++++ b/sysdeps/aarch64/configure.ac +@@ -90,9 +90,10 @@ LIBC_CONFIG_VAR([aarch64-variant-pcs], [$libc_cv_aarch64_variant_pcs]) + # Check if asm support armv8.2-a+sve + AC_CACHE_CHECK([for SVE support in assembler], [libc_cv_aarch64_sve_asm], [dnl + cat > conftest.s <<\EOF +- ptrue p0.b ++ .arch armv8.2-a+sve ++ ptrue p0.b + EOF +-if AC_TRY_COMMAND(${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&AS_MESSAGE_LOG_FD); then ++if AC_TRY_COMMAND(${CC-cc} -c conftest.s 1>&AS_MESSAGE_LOG_FD); then + libc_cv_aarch64_sve_asm=yes + else + libc_cv_aarch64_sve_asm=no +-- +2.33.0 + |