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"""Build definitions for Ruy.
In some cases these are used to configure specific targets for
specific platforms, and dispatch is based on runtime capability detection.
"""
# 1. Enable -mfpu=neon unconditionally on ARM32. If it turns out that we need to support
# ARM32 without NEON then we'll implement runtime detection and dispatch at that point.
# 2. Explicitly pass -O3 on optimization configs where just "-c opt" means "optimize for code size".
def ruy_copts_base():
return select({
":armeabi-v7a": [
"-mfpu=neon",
],
"//conditions:default": [],
}) + select({
":optimized": ["-O3"],
"//conditions:default": [],
})
# Used for targets that are compiled with extra features that are skipped at runtime if unavailable.
def ruy_copts_skylake():
return select({
":x86_64": ["-march=skylake-avx512"],
"//conditions:default": [],
})
# Used for targets that are compiled with extra features that are skipped at runtime if unavailable.
def ruy_copts_avx2():
return select({
":x86_64": ["-mavx2", "-mfma"],
"//conditions:default": [],
})
# TODO(b/147376783): SSE 4.2 and AVX-VNNI support is incomplete / placeholder.
# Optimization is not finished. In particular the dimensions of the kernel
# blocks can be changed as desired.
#
# Used for targets that are compiled with extra features that are skipped at runtime if unavailable.
def ruy_copts_sse42():
return []
# TODO(b/147376783): SSE 4.2 and AVX-VNNI support is incomplete / placeholder.
# Optimization is not finished. In particular the dimensions of the kernel
# blocks can be changed as desired.
#
# Used for targets that are compiled with extra features that are skipped at runtime if unavailable.
def ruy_copts_avxvnni():
return select({
# TODO(b/146494398): Reinstate flag, something like "-march=cascadelake".
":x86_64": [],
"//conditions:default": [],
})
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