zephyr/cmake: move math/*.c files to now common math/CMakeLists.txt

CMake decentralization per thesofproject#8260

The purpose of thesofproject#8260 is to divide and conquer the giant
zephyr/CMakeLists.txt file while staying _bug-for-bug compatible_.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

src/math/CMakeLists.txt

@@ -5,31 +5,40 @@ if(BUILD_LIBRARY)
 	return()
 endif()
 
+is_zephyr(it_is_zephyr)
+
 add_local_sources(sof numbers.c)
 
-if(CONFIG_CORDIC_FIXED)
+# Up to now, trig.c has never been optional in Zephyr.
+# Maybe it should be in the future.
+if(CONFIG_CORDIC_FIXED OR it_is_zephyr)
         add_local_sources(sof trig.c)
 endif()
 
 add_local_sources_ifdef(CONFIG_SQRT_FIXED sof sqrt_int16.c)
 
 add_local_sources_ifdef(CONFIG_MATH_EXP sof exp_fcn.c exp_fcn_hifi.c)
 
-if(CONFIG_MATH_DECIBELS)
+# Up to now, decibels.c has never been optional in Zephyr.
+# Maybe it should be in the future.
+if(CONFIG_MATH_DECIBELS OR it_is_zephyr)
         add_local_sources(sof decibels.c)
 endif()
 
+if(NOT it_is_zephyr) # So far none of these has ever been enabled in Zephyr.
 add_local_sources_ifdef(CONFIG_NATURAL_LOGARITHM_FIXED sof log_e.c)
 
 add_local_sources_ifdef(CONFIG_COMMON_LOGARITHM_FIXED sof log_10.c)
 
 add_local_sources_ifdef(CONFIG_POWER_FIXED sof power.c)
 
 add_local_sources_ifdef(CONFIG_BINARY_LOGARITHM_FIXED sof base2log.c)
+endif()
 
 add_local_sources_ifdef(CONFIG_MATH_FIR sof fir_generic.c fir_hifi2ep.c fir_hifi3.c)
 
-if(CONFIG_MATH_FFT)
+# So far this directory has never been enabled in Zephyr.
+if(CONFIG_MATH_FFT AND NOT it_is_zephyr)
 	add_subdirectory(fft)
 endif()
 
@@ -39,6 +48,7 @@ add_local_sources_ifdef(CONFIG_MATH_IIR_DF2T sof
 add_local_sources_ifdef(CONFIG_MATH_IIR_DF1 sof
 	iir_df1_generic.c iir_df1_hifi3.c iir_df1.c)
 
+if(NOT it_is_zephyr) # So far none of these has ever been enabled in Zephyr.
 if(CONFIG_MATH_WINDOW)
 	 add_local_sources(sof window.c)
 endif()
@@ -54,3 +64,4 @@ endif()
 if(CONFIG_MATH_DCT)
 	 add_local_sources(sof dct.c)
 endif()
+endif() # not Zephyr

zephyr/CMakeLists.txt

@@ -56,7 +56,6 @@ set(SOF_SAMPLES_PATH "${SOF_SRC_PATH}/samples")
 set(SOF_LIB_PATH "${SOF_SRC_PATH}/lib")
 set(SOF_DRIVERS_PATH "${SOF_SRC_PATH}/drivers")
 set(SOF_DEBUG_PATH "${SOF_SRC_PATH}/debug")
-set(SOF_MATH_PATH "${SOF_SRC_PATH}/math")
 set(SOF_TRACE_PATH "${SOF_SRC_PATH}/trace")
 
 set(RIMAGE_TOP ${sof_top_dir}/tools/rimage)
@@ -146,6 +145,7 @@ endmacro()
 
 add_subdirectory(../src/init/ init_unused_install/)
 add_subdirectory(../src/ipc/  ipc_unused_install/)
+add_subdirectory(../src/math/ math_unused_install/)
 
 
 
@@ -366,11 +366,6 @@ zephyr_include_directories(${SOF_PLATFORM_PATH}/${PLATFORM}/include)
 # Commented files will be added/removed as integration dictates.
 zephyr_library_sources(
 
-	# SOF math utilities
-	${SOF_MATH_PATH}/decibels.c
-	${SOF_MATH_PATH}/numbers.c
-	${SOF_MATH_PATH}/trig.c
-
 	# SOF library - parts to transition to Zephyr over time
 	${SOF_LIB_PATH}/clk.c
 	${SOF_LIB_PATH}/notifier.c
@@ -485,24 +480,6 @@ elseif(CONFIG_IPC_MAJOR_4)
 	)
 endif()
 
-zephyr_library_sources_ifdef(CONFIG_MATH_FIR
-	${SOF_MATH_PATH}/fir_generic.c
-	${SOF_MATH_PATH}/fir_hifi2ep.c
-	${SOF_MATH_PATH}/fir_hifi3.c
-)
-
-zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF1
-	${SOF_MATH_PATH}/iir_df1_generic.c
-	${SOF_MATH_PATH}/iir_df1_hifi3.c
-	${SOF_MATH_PATH}/iir_df1.c
-)
-
-zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF2T
-	${SOF_MATH_PATH}/iir_df2t_generic.c
-	${SOF_MATH_PATH}/iir_df2t_hifi3.c
-	${SOF_MATH_PATH}/iir_df2t.c
-)
-
 zephyr_library_sources_ifdef(CONFIG_COMP_ASRC
 	${SOF_AUDIO_PATH}/asrc/asrc.c
 	${SOF_AUDIO_PATH}/asrc/asrc_farrow_hifi3.c
@@ -785,15 +762,6 @@ zephyr_library_sources_ifdef(CONFIG_COMP_TDFB
 	${SOF_AUDIO_PATH}/tdfb/tdfb_hifi3.c
 )
 
-zephyr_library_sources_ifdef(CONFIG_SQRT_FIXED
-	${SOF_MATH_PATH}/sqrt_int16.c
-)
-
-zephyr_library_sources_ifdef(CONFIG_MATH_EXP
-	${SOF_MATH_PATH}/exp_fcn.c
-	${SOF_MATH_PATH}/exp_fcn_hifi.c
-)
-
 zephyr_library_sources_ifdef(CONFIG_COMP_UP_DOWN_MIXER
 	${SOF_AUDIO_PATH}/up_down_mixer/up_down_mixer.c
 	${SOF_AUDIO_PATH}/up_down_mixer/up_down_mixer_hifi3.c