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LoongArch: config: Added HAVE_LOONGARCH_VEC_ASM.

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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.
This commit is contained in:
caiyinyu 2023-07-06 16:30:52 +08:00
parent 19f9f7f9d5
commit 0d341d09f2
3 changed files with 48 additions and 0 deletions
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5
config.h.in
View File

@ -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

28
sysdeps/loongarch/configure vendored
View File

@ -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

15
sysdeps/loongarch/configure.ac
View File

@ -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