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66 lines
2.8 KiB
66 lines
2.8 KiB
# Library Utility Functions
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#
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# This should be included following 'lib_info.mk'.
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# Function: GetCNAVar variable-name platform-key config arch
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#
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# Get a per-config-and-arch variable value.
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GetCNAVar = $(strip \
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$(or $($(2).$(1).$(3).$(4)), \
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$($(2).$(1).$(3)), \
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$($(2).$(1).$(4)), \
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$($(2).$(1))))
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# Function: SelectFunctionDir config arch function-name optimized
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#
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# Choose the appropriate implementation directory to use for 'function-name' in
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# the configuration 'config' and on given arch.
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SelectFunctionDir = $(strip \
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$(call Set,Tmp.SelectFunctionDir,$(call SelectFunctionDirs,$(1),$(2),$(3),$(4)))\
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$(if $(call streq,1,$(words $(Tmp.SelectFunctionDir))),\
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$(Tmp.SelectFunctionDir),\
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$(error SelectFunctionDir: invalid function name "$(3)" ($(strip\
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$(if $(call streq,0,$(words $(Tmp.SelectFunctionDir))),\
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no such function,\
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function implemented in multiple directories!!!))))))
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# Helper functions that select the entire list of subdirs where a function is
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# defined with a certain specificity.
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SelectFunctionDirs_Opt_ConfigAndArch = $(strip \
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$(foreach key,$(AvailableIn.$(3)),\
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$(if $(and $(call streq,Optimized,$($(key).Implementation)),\
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$(call contains,$($(key).OnlyConfigs),$(1)),\
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$(call contains,$($(key).OnlyArchs),$(2))),$(key),)))
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SelectFunctionDirs_Opt_Config = $(strip \
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$(foreach key,$(AvailableIn.$(3)),\
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$(if $(and $(call streq,Optimized,$($(key).Implementation)),\
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$(call contains,$($(key).OnlyConfigs),$(1))),$(key),)))
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SelectFunctionDirs_Opt_Arch = $(strip \
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$(foreach key,$(AvailableIn.$(3)),\
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$(if $(and $(call streq,Optimized,$($(key).Implementation)),\
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$(call contains,$($(key).OnlyArchs),$(2))),$(key),)))
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SelectFunctionDirs_Gen = $(strip \
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$(foreach key,$(AvailableIn.$(3)),\
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$(if $(call streq,Generic,$($(key).Implementation)),$(key))))
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# Helper function to select the right set of dirs in generic priority order.
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SelectFunctions_Gen = \
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$(or $(call SelectFunctionDirs_Gen,$(1),$(2),$(3)),\
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$(call SelectFunctionDirs_Opt_ConfigAndArch,$(1),$(2),$(3)), \
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$(call SelectFunctionDirs_Opt_Config,$(1),$(2),$(3)), \
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$(call SelectFunctionDirs_Opt_Arch,$(1),$(2),$(3)))
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# Helper function to select the right set of dirs in optimized priority order.
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SelectFunctions_Opt = \
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$(or $(call SelectFunctionDirs_Opt_ConfigAndArch,$(1),$(2),$(3)), \
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$(call SelectFunctionDirs_Opt_Config,$(1),$(2),$(3)), \
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$(call SelectFunctionDirs_Opt_Arch,$(1),$(2),$(3)), \
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$(call SelectFunctionDirs_Gen,$(1),$(2),$(3)))
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# Helper function to select the right set of dirs (which should be exactly one)
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# for a function.
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SelectFunctionDirs = \
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$(if $(call streq,1,$(4)),\
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$(call SelectFunctions_Opt,$(1),$(2),$(3)),\
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$(call SelectFunctions_Gen,$(1),$(2),$(3)))
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