AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-25 14:30:06 +00:00
Code Issues Packages Projects Releases Wiki Activity
cd94326a13
glibc/sysdeps/aarch64/configure
Joe Ramsay cd94326a13 Enable libmvec support for AArch64 
This patch enables libmvec on AArch64. The proposed change is mainly
implementing build infrastructure to add the new routines to ABI,
tests and benchmarks. I have demonstrated how this all fits together
by adding implementations for vector cos, in both single and double
precision, targeting both Advanced SIMD and SVE.

The implementations of the routines themselves are just loops over the
scalar routine from libm for now, as we are more concerned with
getting the plumbing right at this point. We plan to contribute vector
routines from the Arm Optimized Routines repo that are compliant with
requirements described in the libmvec wiki.

Building libmvec requires minimum GCC 10 for SVE ACLE. To avoid raising
the minimum GCC by such a big jump, we allow users to disable libmvec
if their compiler is too old.

Note that at this point users have to manually call the vector math
functions. This seems to be acceptable to some downstream users.

Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2023-05-03 12:09:49 +01:00

353 lines
12 KiB
Plaintext
Raw Blame History

# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/aarch64.
# Static PIE is supported.
$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
# We check to see if the compiler and flags are
# selecting the big endian ABI and if they are then
# we set libc_cv_aarch64_be to yes which causes
# HAVE_AARCH64_BE to be defined in config.h and
# in include/libc-symbols.h and thus available to
# shlib-versions to select the appropriate name for
# the dynamic linker via %ifdef.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
if ${ac_cv_path_GREP+:} false; then :
$as_echo_n "(cached) " >&6
else
if test -z "$GREP"; then
ac_path_GREP_found=false
# Loop through the user's path and test for each of PROGNAME-LIST
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_prog in grep ggrep; do
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
as_fn_executable_p "$ac_path_GREP" || continue
# Check for GNU ac_path_GREP and select it if it is found.
# Check for GNU $ac_path_GREP
case `"$ac_path_GREP" --version 2>&1` in
*GNU*)
ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
*)
ac_count=0
$as_echo_n 0123456789 >"conftest.in"
while :
do
cat "conftest.in" "conftest.in" >"conftest.tmp"
mv "conftest.tmp" "conftest.in"
cp "conftest.in" "conftest.nl"
$as_echo 'GREP' >> "conftest.nl"
"$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
as_fn_arith $ac_count + 1 && ac_count=$as_val
if test $ac_count -gt ${ac_path_GREP_max-0}; then
# Best one so far, save it but keep looking for a better one
ac_cv_path_GREP="$ac_path_GREP"
ac_path_GREP_max=$ac_count
fi
# 10*(2^10) chars as input seems more than enough
test $ac_count -gt 10 && break
done
rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac
$ac_path_GREP_found && break 3
done
done
done
IFS=$as_save_IFS
if test -z "$ac_cv_path_GREP"; then
as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
fi
else
ac_cv_path_GREP=$GREP
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
$as_echo "$ac_cv_path_GREP" >&6; }
GREP="$ac_cv_path_GREP"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
$as_echo_n "checking for egrep... " >&6; }
if ${ac_cv_path_EGREP+:} false; then :
$as_echo_n "(cached) " >&6
else
if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
then ac_cv_path_EGREP="$GREP -E"
else
if test -z "$EGREP"; then
ac_path_EGREP_found=false
# Loop through the user's path and test for each of PROGNAME-LIST
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_prog in egrep; do
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
as_fn_executable_p "$ac_path_EGREP" || continue
# Check for GNU ac_path_EGREP and select it if it is found.
# Check for GNU $ac_path_EGREP
case `"$ac_path_EGREP" --version 2>&1` in
*GNU*)
ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
*)
ac_count=0
$as_echo_n 0123456789 >"conftest.in"
while :
do
cat "conftest.in" "conftest.in" >"conftest.tmp"
mv "conftest.tmp" "conftest.in"
cp "conftest.in" "conftest.nl"
$as_echo 'EGREP' >> "conftest.nl"
"$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
as_fn_arith $ac_count + 1 && ac_count=$as_val
if test $ac_count -gt ${ac_path_EGREP_max-0}; then
# Best one so far, save it but keep looking for a better one
ac_cv_path_EGREP="$ac_path_EGREP"
ac_path_EGREP_max=$ac_count
fi
# 10*(2^10) chars as input seems more than enough
test $ac_count -gt 10 && break
done
rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac
$ac_path_EGREP_found && break 3
done
done
done
IFS=$as_save_IFS
if test -z "$ac_cv_path_EGREP"; then
as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
fi
else
ac_cv_path_EGREP=$EGREP
fi
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
$as_echo "$ac_cv_path_EGREP" >&6; }
EGREP="$ac_cv_path_EGREP"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for big endian" >&5
$as_echo_n "checking for big endian... " >&6; }
if ${libc_cv_aarch64_be+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifdef __AARCH64EB__
yes
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "yes" >/dev/null 2>&1; then :
libc_cv_aarch64_be=yes
else
libc_cv_aarch64_be=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
$as_echo "$libc_cv_aarch64_be" >&6; }
if test $libc_cv_aarch64_be = yes; then
$as_echo "#define HAVE_AARCH64_BE 1" >>confdefs.h
config_vars="$config_vars
default-abi = lp64_be"
else
config_vars="$config_vars
default-abi = lp64"
fi
# Only consider BTI supported if -mbranch-protection=bti is
# on by default in the compiler and the linker produces
# binaries with GNU property notes in PT_GNU_PROPERTY segment.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BTI support" >&5
$as_echo_n "checking for BTI support... " >&6; }
if ${libc_cv_aarch64_bti+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<EOF
void foo (void) { }
EOF
libc_cv_aarch64_bti=no
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.c'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } \
&& { ac_try='$READELF -lW conftest.so | grep -q GNU_PROPERTY'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } \
&& { ac_try='$READELF -nW conftest.so | grep -q "NT_GNU_PROPERTY_TYPE_0.*AArch64 feature:.* BTI"'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }
then
libc_cv_aarch64_bti=yes
fi
rm -rf conftest.*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_bti" >&5
$as_echo "$libc_cv_aarch64_bti" >&6; }
config_vars="$config_vars
aarch64-bti = $libc_cv_aarch64_bti"
if test $libc_cv_aarch64_bti = yes; then
$as_echo "#define HAVE_AARCH64_BTI 1" >>confdefs.h
fi
# Check if glibc is built with return address signing, i.e.
# if -mbranch-protection=pac-ret is on. We need this because
# pac-ret relies on unwinder support so it's not safe to use
# it in assembly code unconditionally, but there is no
# feature test macro for it in gcc.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if pac-ret is enabled" >&5
$as_echo_n "checking if pac-ret is enabled... " >&6; }
if ${libc_cv_aarch64_pac_ret+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<EOF
int bar (void);
int foo (void) { return bar () + 1; }
EOF
libc_cv_aarch64_pac_ret=no
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S -o conftest.s conftest.c'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } \
&& { ac_try='grep -q -E '\''(hint( | )+25|paciasp)'\'' conftest.s'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }
then
libc_cv_aarch64_pac_ret=yes
fi
rm -rf conftest.*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_pac_ret" >&5
$as_echo "$libc_cv_aarch64_pac_ret" >&6; }
if test $libc_cv_aarch64_pac_ret = yes; then
$as_echo "#define HAVE_AARCH64_PAC_RET 1" >>confdefs.h
fi
# Check if binutils supports variant PCS symbols.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for variant PCS support" >&5
$as_echo_n "checking for variant PCS support... " >&6; }
if ${libc_cv_aarch64_variant_pcs+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.S <<EOF
.global foo
.type foo, %function
.variant_pcs foo
foo:
ret
.global bar
.type bar, %function
bar:
b foo
EOF
libc_cv_aarch64_variant_pcs=no
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.S'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } \
&& { ac_try='$READELF -dW conftest.so | grep -q AARCH64_VARIANT_PCS'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }
then
libc_cv_aarch64_variant_pcs=yes
fi
rm -rf conftest.*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_variant_pcs" >&5
$as_echo "$libc_cv_aarch64_variant_pcs" >&6; }
config_vars="$config_vars
aarch64-variant-pcs = $libc_cv_aarch64_variant_pcs"
# Check if asm support armv8.2-a+sve
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for SVE support in assembler" >&5
$as_echo_n "checking for SVE support in assembler... " >&6; }
if ${libc_cv_aarch64_sve_asm+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.s <<\EOF
ptrue p0.b
EOF
if { ac_try='${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then
libc_cv_aarch64_sve_asm=yes
else
libc_cv_aarch64_sve_asm=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_sve_asm" >&5
$as_echo "$libc_cv_aarch64_sve_asm" >&6; }
if test $libc_cv_aarch64_sve_asm = yes; then
$as_echo "#define HAVE_AARCH64_SVE_ASM 1" >>confdefs.h
fi
if test x"$build_mathvec" = xnotset; then
build_mathvec=yes
fi
# Check if compiler is sufficient to build mathvec (needs SVE ACLE)
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for availability of SVE ACLE" >&5
$as_echo_n "checking for availability of SVE ACLE... " >&6; }
if ${libc_cv_has_sve_acle+:} false; then :
$as_echo_n "(cached) " >&6
else
if test $build_mathvec = yes; then
cat > conftest.c <<EOF
#include <arm_sve.h>
EOF
if ! ${CC-cc} conftest.c -fsyntax-only; then
as_fn_error 1 "mathvec is enabled but compiler does not have SVE ACLE. Either use a compatible compiler or configure with --disable-mathvec (this results in incomplete ABI)."
fi
rm conftest.c
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_has_sve_acle" >&5
$as_echo "$libc_cv_has_sve_acle" >&6; }
Reference in New Issue View Git Blame Copy Permalink