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Probe for old-world LASX flavor on LoongArch and use generic DGEMM kernel otherwise 

See: https://bugs.gentoo.org/844013
This commit is contained in:
WANG Xuerui 2022-05-13 15:53:22 +08:00
parent 5af7b8638b
commit 869061c783
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GPG Key ID: 83EF2D9C2A5D6927
3 changed files with 32 additions and 1 deletions
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1
Makefile.system
View File

@ -1702,6 +1702,7 @@ export TARGET_CORE
export NO_AVX512
export NO_AVX2
export BUILD_BFLOAT16
export NO_LASX
export SBGEMM_UNROLL_M
export SBGEMM_UNROLL_N

27
c_check
View File

@ -112,7 +112,7 @@ case "$architecture" in
defined=1
;;
arm|arm64) defined=1 ;;
zarch|e2k|alpha|ia64|riscv64|loonarch64)
zarch|e2k|alpha|ia64|riscv64|loongarch64)
defined=1
BINARY=64
;;
@ -240,6 +240,29 @@ if [ "$architecture" = "riscv64" ]; then
rm -rf "$tmpd"
fi
no_lasx=0
if [ "$architecture" = "loongarch64" ]; then
tmpd=`mktemp -d`
tmpf="$tmpd/a.c"
# Old-world assembly flavor: LASX registers named "$xrNN", different
# from the ISA manual which suggests "$xNN". This is the flavor we
# currently support.
#
# As the LASX ISA manual is not out yet, we cannot predict what the
# new-world flavor would look like, so do not probe flavor for now.
# The compiler flags are also unsuitable for new-world gcc.
code='"xvld $xr0, $a0, 0\n"'
printf "int main(void){ __asm__ volatile(%s); }\n" "$code" >> "$tmpf"
args=" -march=loongarch64 -mabi=lp64 -mlasx -c -o $tmpf.o $tmpf"
no_lasx=0
{
$compiler_name $flags $args >/dev/null 2>&1
} || {
no_lasx=1
}
rm -rf "$tmpd"
fi
c11_atomics=0
case "$data" in
*HAVE_C11*)
@ -350,6 +373,7 @@ done
[ "$makefile" = "-" ] && {
[ "$no_rv64gv" -eq 1 ] && printf "NO_RV64GV=1\n"
[ "$no_lasx" -eq 1 ] && printf "NO_LASX=1\n"
[ "$no_avx512" -eq 1 ] && printf "NO_AVX512=1\n"
[ "$no_avx2" -eq 1 ] && printf "NO_AVX2=1\n"
[ "$oldgcc" -eq 1 ] && printf "OLDGCC=1\n"
@ -380,6 +404,7 @@ done
printf "MSA_FLAGS=%s\n" "$msa_flags"
}
[ "$no_rv64gv" -eq 1 ] && printf "NO_RV64GV=1\n"
[ "$no_lasx" -eq 1 ] && printf "NO_LASX=1\n"
[ "$no_avx512" -eq 1 ] && printf "NO_AVX512=1\n"
[ "$no_avx2" -eq 1 ] && printf "NO_AVX2=1\n"
[ "$oldgcc" -eq 1 ] && printf "OLDGCC=1\n"

5
kernel/loongarch64/KERNEL.LOONGSON3R5
View File

@ -1,3 +1,7 @@
ifeq ($(NO_LASX), 1)
# No LASX support in compiler, unable to consume the optimized version
# leave out DGEMMKERNEL to pull in the generic version
else
DGEMMKERNEL = dgemm_kernel_16x4.S
DGEMMINCOPY = dgemm_ncopy_16.S
DGEMMITCOPY = dgemm_tcopy_16.S
@ -7,6 +11,7 @@ DGEMMINCOPYOBJ = dgemm_incopy$(TSUFFIX).$(SUFFIX)
DGEMMITCOPYOBJ = dgemm_itcopy$(TSUFFIX).$(SUFFIX)
DGEMMONCOPYOBJ = dgemm_oncopy$(TSUFFIX).$(SUFFIX)
DGEMMOTCOPYOBJ = dgemm_otcopy$(TSUFFIX).$(SUFFIX)
endif
DTRSMKERNEL_LN = ../generic/trsm_kernel_LN.c
DTRSMKERNEL_LT = ../generic/trsm_kernel_LT.c