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cd94326a13
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>
114 lines
3.5 KiB
Makefile
114 lines
3.5 KiB
Makefile
ifeq ($(subdir),mathvec)
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libmvec-double-func-list = \
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2_core \
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4_core \
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4_core_avx \
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8_core
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libmvec-float-func-list = \
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f4_core \
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f8_core \
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f8_core_avx \
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f16_core
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libmvec-support += \
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svml_d_exp_data \
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svml_d_log_data \
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svml_d_pow_data \
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svml_d_trig_data \
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svml_s_expf_data \
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svml_s_logf_data \
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svml_s_powf_data \
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svml_s_trig_data \
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$(foreach l,$(libmvec-double-func-list), \
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$(addprefix svml_d_,$(addsuffix $(l),$(libmvec-funcs)))) \
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$(foreach l,$(libmvec-float-func-list), \
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$(addprefix svml_s_,$(addsuffix $(l),$(libmvec-funcs))))
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endif
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# Do not run libmvec tests if multiarch not enabled.
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ifneq ($(multi-arch),no)
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# Variables for libmvec tests.
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ifeq ($(subdir)$(build-mathvec),mathyes)
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libmvec-tests += double-vlen2 double-vlen4 double-vlen4-avx2 \
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float-vlen4 float-vlen8 float-vlen8-avx2 \
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double-vlen8 float-vlen16
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tests += \
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$(libmvec-abi-func-tests) \
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$(libmvec-abi-func-avx-tests) \
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$(libmvec-abi-func-avx2-tests) \
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$(libmvec-abi-func-avx512f-tests)
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double-vlen2-funcs = $(libmvec-funcs)
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double-vlen4-funcs = $(libmvec-funcs)
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double-vlen4-avx2-funcs = $(libmvec-funcs)
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double-vlen8-funcs = $(libmvec-funcs)
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float-vlen4-funcs = $(libmvec-funcs)
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float-vlen8-funcs = $(libmvec-funcs)
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float-vlen8-avx2-funcs = $(libmvec-funcs)
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float-vlen16-funcs = $(libmvec-funcs)
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double-vlen4-arch-ext-cflags = -mavx
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double-vlen4-arch-ext2-cflags = -mavx2
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double-vlen8-arch-ext-cflags = -mavx512f
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float-vlen8-arch-ext-cflags = -mavx
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float-vlen8-arch-ext2-cflags = -mavx2
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float-vlen16-arch-ext-cflags = -mavx512f
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libmvec-abi-test-cflags = \
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$(libm-test-fast-math-cflags) \
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-fno-inline -fopenmp -Wno-unknown-pragmas
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CFLAGS-test-double-vlen4-avx2-wrappers.c = $(double-vlen4-arch-ext2-cflags)
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CFLAGS-test-float-vlen8-avx2-wrappers.c = $(float-vlen8-arch-ext2-cflags)
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endif
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ifeq ($(subdir)$(config-cflags-mprefer-vector-width),mathyes)
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# When compiled with -O3 -march=skylake, GCC 8 and 9 optimize some loops
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# in branred.c with 256-bit vector instructions, which leads to store
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# forward stall:
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#
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90579
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#
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# Limit vector width to 128 bits to work around this issue. It improves
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# performance of sin and cos by more than 40% on Skylake.
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CFLAGS-branred.c = -mprefer-vector-width=128
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endif
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ifeq ($(subdir)$(build-mathvec),benchtestsyes)
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double-vlen4-arch-ext-cflags = -mavx
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double-vlen4-arch-ext2-cflags = -mavx2
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double-vlen8-arch-ext-cflags = -mavx512f
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float-vlen8-arch-ext-cflags = -mavx
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float-vlen8-arch-ext2-cflags = -mavx2
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float-vlen16-arch-ext-cflags = -mavx512f
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bench-libmvec := $(bench-libmvec-double) $(bench-libmvec-float)
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ifeq (${STATIC-BENCHTESTS},yes)
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libmvec-benchtests = $(common-objpfx)mathvec/libmvec.a $(common-objpfx)math/libm.a
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else
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libmvec-benchtests = $(libmvec) $(libm)
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endif
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$(addprefix $(objpfx)bench-,$(bench-libmvec-double)): $(libmvec-benchtests)
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$(addprefix $(objpfx)bench-,$(bench-libmvec-float)): $(libmvec-benchtests)
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bench-libmvec-deps = $(..)benchtests/bench-libmvec-skeleton.c $(..)sysdeps/x86_64/fpu/bench-libmvec-arch.h bench-timing.h Makefile
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$(objpfx)bench-float-%.c: $(bench-libmvec-deps)
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{ if [ -n "$($*-INCLUDE)" ]; then \
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cat $($*-INCLUDE); \
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fi; \
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$(PYTHON) $(..)sysdeps/x86_64/fpu/scripts/bench_libmvec.py $(basename $(@F)); } > $@-tmp
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mv -f $@-tmp $@
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$(objpfx)bench-double-%.c: $(bench-libmvec-deps)
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{ if [ -n "$($*-INCLUDE)" ]; then \
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cat $($*-INCLUDE); \
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fi; \
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$(PYTHON) $(..)sysdeps/x86_64/fpu/scripts/bench_libmvec.py $(basename $(@F)); } > $@-tmp
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mv -f $@-tmp $@
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endif
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endif
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