Bgemm for arm64 #5711

Job	Run time
neoverse_build	7m 41s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	7m 0s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	5m 55s
msys2 (UCRT64, int64, Release)	1h 37m 24s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	6m 59s
msys2 (CLANG64, int32, Release)	1h 8m 59s
msys2 (MINGW32, int32, Release)	1h 1m 8s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	5m 1s
msys2 (CLANG64, int64, Release)	1h 6m 39s
build (ubuntu-latest, gfortran, cmake)	46m 2s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	1h 24m 9s
build (macos-latest, gfortran, make)	13m 14s
build (ubuntu-latest, flang, cmake)	37m 51s
build (ubuntu-latest, flang, make)	15m 16s
build (macos-latest, gfortran, cmake)	29m 36s
msys2 (UCRT64, int32, Release)	1h 35m 28s
build (ubuntu-latest, gfortran, make)	21m 17s
	11h 9m 39s

Provide feedback