glibc/sysdeps/aarch64/fpu/Makefile
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

62 lines
2.0 KiB
Makefile

float-advsimd-funcs = cos
double-advsimd-funcs = cos
float-sve-funcs = cos
double-sve-funcs = cos
ifeq ($(subdir),mathvec)
libmvec-support = $(addsuffix f_advsimd,$(float-advsimd-funcs)) \
$(addsuffix _advsimd,$(double-advsimd-funcs)) \
$(addsuffix f_sve,$(float-sve-funcs)) \
$(addsuffix _sve,$(double-sve-funcs))
endif
sve-cflags = -march=armv8-a+sve
ifeq ($(build-mathvec),yes)
bench-libmvec = $(addprefix float-advsimd-,$(float-advsimd-funcs)) \
$(addprefix double-advsimd-,$(double-advsimd-funcs)) \
$(addprefix float-sve-,$(float-sve-funcs)) \
$(addprefix double-sve-,$(double-sve-funcs))
endif
$(objpfx)bench-float-advsimd-%.c:
$(PYTHON) $(..)sysdeps/aarch64/fpu/scripts/bench_libmvec_advsimd.py $(basename $(@F)) > $@
$(objpfx)bench-double-advsimd-%.c:
$(PYTHON) $(..)sysdeps/aarch64/fpu/scripts/bench_libmvec_advsimd.py $(basename $(@F)) > $@
$(objpfx)bench-float-sve-%.c:
$(PYTHON) $(..)sysdeps/aarch64/fpu/scripts/bench_libmvec_sve.py $(basename $(@F)) > $@
$(objpfx)bench-double-sve-%.c:
$(PYTHON) $(..)sysdeps/aarch64/fpu/scripts/bench_libmvec_sve.py $(basename $(@F)) > $@
ifeq (${STATIC-BENCHTESTS},yes)
libmvec-benchtests = $(common-objpfx)mathvec/libmvec.a $(common-objpfx)math/libm.a
else
libmvec-benchtests = $(libmvec) $(libm)
endif
$(addprefix $(objpfx)bench-,$(bench-libmvec)): $(libmvec-benchtests)
ifeq ($(build-mathvec),yes)
libmvec-tests += float-advsimd double-advsimd float-sve double-sve
endif
define sve-float-cflags-template
CFLAGS-$(1)f_sve.c += $(sve-cflags)
CFLAGS-bench-float-sve-$(1).c += $(sve-cflags)
endef
define sve-double-cflags-template
CFLAGS-$(1)_sve.c += $(sve-cflags)
CFLAGS-bench-double-sve-$(1).c += $(sve-cflags)
endef
$(foreach f,$(float-sve-funcs), $(eval $(call sve-float-cflags-template,$(f))))
$(foreach f,$(double-sve-funcs), $(eval $(call sve-double-cflags-template,$(f))))
CFLAGS-test-float-sve-wrappers.c = $(sve-cflags)
CFLAGS-test-double-sve-wrappers.c = $(sve-cflags)