armv8-r/libc: optimize libc string apis with asm

Optimize libc string apis(memcpy/memset/memmove/memchr/strcmp/strlen)
with arm32 assembly instruction including vfp and neon.
Add arch releated elf parsing

Signed-off-by: Jinliang Li <[email protected]>

libs/libc/machine/arm/CMakeLists.txt

@@ -44,6 +44,8 @@ elseif(CONFIG_ARCH_ARMV7M) # All ARMv7-M
   add_subdirectory(armv7-m)
 elseif(CONFIG_ARCH_ARMV8M) # All ARMv8-M
   add_subdirectory(armv8-m)
+elseif(CONFIG_ARCH_ARMV8R) # All ARMv8-R
+  add_subdirectory(armv8-r)
 endif()
 
 if(NOT CONFIG_LIBSUPCXX_TOOLCHAIN)

libs/libc/machine/arm/Kconfig

@@ -27,3 +27,7 @@ endif
 if ARCH_ARMV8M
 source "libs/libc/machine/arm/armv8-m/Kconfig"
 endif
+
+if ARCH_ARMV8R
+source "libs/libc/machine/arm/armv8-r/Kconfig"
+endif

libs/libc/machine/arm/Make.defs

@@ -42,6 +42,8 @@ else ifeq ($(CONFIG_ARCH_ARMV7M),y)     # All ARMv7-M
 include $(TOPDIR)/libs/libc/machine/arm/armv7-m/Make.defs
 else ifeq ($(CONFIG_ARCH_ARMV8M),y)     # All ARMv8-M
 include $(TOPDIR)/libs/libc/machine/arm/armv8-m/Make.defs
+else ifeq ($(CONFIG_ARCH_ARMV8R),y)     # All ARMv8-R
+include $(TOPDIR)/libs/libc/machine/arm/armv8-r/Make.defs
 endif
 
 ifneq ($(CONFIG_LIBSUPCXX_TOOLCHAIN),y)

libs/libc/machine/arm/armv8-r/CMakeLists.txt

@@ -0,0 +1,55 @@
+# ##############################################################################
+# libs/libc/machine/arm/armv8-r/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+if(CONFIG_ARCH_TOOLCHAIN_GNU)
+  set(ARCH_TOOLCHAIN_DIR gnu)
+endif()
+
+if(CONFIG_ARMV8R_MEMCHR)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_memchr.S)
+endif()
+
+if(CONFIG_ARMV8R_MEMCPY)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_memcpy.S)
+endif()
+
+if(CONFIG_ARMV8R_MEMMOVE)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_memmove.S)
+endif()
+
+if(CONFIG_ARMV8R_MEMSET)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_memset.S)
+endif()
+
+if(CONFIG_ARMV8R_STRCMP)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_strcmp.S)
+endif()
+
+if(CONFIG_ARMV8R_STRLEN)
+  list(APPEND SRCS ${ARCH_TOOLCHAIN_DIR}/arch_strlen.S)
+endif()
+
+if(CONFIG_LIBC_ARCH_ELF)
+  list(APPEND SRCS arch_elf.c)
+endif()
+
+target_sources(c PRIVATE ${SRCS})

libs/libc/machine/arm/armv8-r/Kconfig

@@ -0,0 +1,63 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config ARMV8R_STRING_FUNCTION
+	bool "Enable optimized ARMV8R specific string function"
+	default n
+	depends on ARCH_TOOLCHAIN_GNU
+	select ARMV8R_MEMCHR
+	select ARMV8R_MEMCPY
+	select ARMV8R_MEMMOVE
+	select ARMV8R_MEMSET
+	select ARMV8R_STRCMP
+	select ARMV8R_STRLEN
+
+config ARMV8R_MEMCHR
+	bool "Enable optimized memchr() for ARMv8-R"
+	default n
+	select LIBC_ARCH_MEMCHR
+	depends on ARCH_TOOLCHAIN_GNU
+	---help---
+		Enable optimized ARMv8-R specific memchr() library function
+
+config ARMV8R_MEMCPY
+	bool "Enable optimized memcpy() for ARMv8-R"
+	select LIBC_ARCH_MEMCPY
+	depends on ARCH_TOOLCHAIN_GNU
+	---help---
+		Enable optimized ARMv8-R specific memcpy() library function
+
+config ARMV8R_MEMMOVE
+	bool "Enable optimized memmove() for ARMv8-R"
+	default n
+	select LIBC_ARCH_MEMMOVE
+	depends on ARCH_TOOLCHAIN_GNU
+	---help---
+		Enable optimized ARMv8-R specific memmove() library function
+
+config ARMV8R_MEMSET
+	bool "Enable optimized memset() for ARMv8-R"
+	default n
+	select LIBC_ARCH_MEMSET
+	depends on ARCH_TOOLCHAIN_GNU
+	depends on ARM_NEON
+	---help---
+		Enable optimized ARMv8-R specific memset() library function
+
+config ARMV8R_STRCMP
+	bool "Enable optimized strcmp() for ARMv8-R"
+	default n
+	select LIBC_ARCH_STRCMP
+	depends on ARCH_TOOLCHAIN_GNU
+	---help---
+		Enable optimized ARMv8-R specific strcmp() library function
+
+config ARMV8R_STRLEN
+	bool "Enable optimized strlen() for ARMv8-R"
+	default n
+	select LIBC_ARCH_STRLEN
+	depends on ARCH_TOOLCHAIN_GNU
+	---help---
+		Enable optimized ARMv8-R specific strlen() library function

libs/libc/machine/arm/armv8-r/Make.defs

@@ -0,0 +1,57 @@
+############################################################################
+# libs/libc/machine/arm/armv8-r/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifeq ($(CONFIG_ARMV8R_MEMCHR),y)
+ASRCS += arch_memchr.S
+endif
+
+ifeq ($(CONFIG_ARMV8R_MEMCPY),y)
+ASRCS += arch_memcpy.S
+endif
+
+ifeq ($(CONFIG_ARMV8R_MEMMOVE),y)
+ASRCS += arch_memmove.S
+endif
+
+ifeq ($(CONFIG_ARMV8R_MEMSET),y)
+ASRCS += arch_memset.S
+endif
+
+ifeq ($(CONFIG_ARMV8R_STRCMP),y)
+ASRCS += arch_strcmp.S
+endif
+
+ifeq ($(CONFIG_ARMV8R_STRLEN),y)
+ASRCS += arch_strlen.S
+endif
+
+ifeq ($(CONFIG_LIBC_ARCH_ELF),y)
+CSRCS += arch_elf.c
+endif
+
+ifeq ($(CONFIG_ARCH_TOOLCHAIN_GNU),y)
+DEPPATH += --dep-path machine/arm/armv8-r/gnu
+VPATH += :machine/arm/armv8-r/gnu
+endif
+
+DEPPATH += --dep-path machine/arm/armv8-r
+VPATH += :machine/arm/armv8-r