@@ -141,6 +141,11 @@
/* LOONGARCH floating-point ABI for ld.so. */
#undef LOONGARCH_ABI_FRLEN
+/* Assembler support LoongArch LASX/LSX vector instructions.
+ This macro becomes obsolete when glibc increased the minimum
+ required version of GNU 'binutils' to 2.41 or later. */
+#define HAVE_LOONGARCH_VEC_ASM 0
+
/* Linux specific: minimum supported kernel version. */
#undef __LINUX_KERNEL_VERSION
@@ -101,3 +101,31 @@ fi
$as_echo "$libc_cv_loongarch_cmodel_medium" >&6; }
config_vars="$config_vars
have-cmodel-medium = $libc_cv_loongarch_cmodel_medium"
+
+# Check if asm support vector instructions.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for vector support in assembler" >&5
+$as_echo_n "checking for vector support in assembler... " >&6; }
+if ${libc_cv_loongarch_vec_asm+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.s <<\EOF
+ vld $vr0, $sp, 0
+EOF
+if { ac_try='${CC-cc} -c $CFLAGS conftest.s -o conftest 1>&5'
+ { { eval echo "\"\$as_me\":${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_loongarch_vec_asm=yes
+else
+ libc_cv_loongarch_vec_asm=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_loongarch_vec_asm" >&5
+$as_echo "$libc_cv_loongarch_vec_asm" >&6; }
+if test $libc_cv_loongarch_vec_asm = yes; then
+ $as_echo "#define HAVE_LOONGARCH_VEC_ASM 1" >>confdefs.h
+
+fi
@@ -62,3 +62,18 @@ AC_CACHE_CHECK(whether $CC supports option -mcmodel=medium,
libc_cv_loongarch_cmodel_medium=no
fi])
LIBC_CONFIG_VAR([have-cmodel-medium], [$libc_cv_loongarch_cmodel_medium])
+
+# Check if asm support vector instructions.
+AC_CACHE_CHECK(for vector support in assembler, libc_cv_loongarch_vec_asm, [dnl
+cat > conftest.s <<\EOF
+ vld $vr0, $sp, 0
+EOF
+if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s -o conftest 1>&AS_MESSAGE_LOG_FD); then
+ libc_cv_loongarch_vec_asm=yes
+else
+ libc_cv_loongarch_vec_asm=no
+fi
+rm -f conftest*])
+if test $libc_cv_loongarch_vec_asm = yes; then
+ AC_DEFINE(HAVE_LOONGARCH_VEC_ASM)
+fi
This patch checks if assembler supports vector instructions to generate LASX/LSX code or not, and then define HAVE_LOONGARCH_VEC_ASM macro We have added support for vector instructions in binutils-2.41 See: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=75b2f521b101d974354f6ce9ed7c054d8b2e3b7a commit 75b2f521b101d974354f6ce9ed7c054d8b2e3b7a Author: mengqinggang <mengqinggang@loongson.cn> Date: Thu Jun 22 10:35:28 2023 +0800 LoongArch: gas: Add lsx and lasx instructions support gas/ChangeLog: * config/tc-loongarch.c (md_parse_option): Add lsx and lasx option. (loongarch_after_parse_args): Add lsx and lasx option. opcodes/ChangeLog: * loongarch-opc.c (struct loongarch_ase): Add lsx and lasx instructions. --- config.h.in | 5 +++++ sysdeps/loongarch/configure | 28 ++++++++++++++++++++++++++++ sysdeps/loongarch/configure.ac | 15 +++++++++++++++ 3 files changed, 48 insertions(+)