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https://github.com/apache/nuttx.git
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931d5f50d4
Add word-at-a-time strlcpy using DETECTNULL for both the copy phase and the strlen tail when truncated. The copy loop aligns src and processes a register at a time, falling to bytewise for the last word containing the terminator. When truncated, the remaining src length is measured with a second word-at-a-time loop. strlcpy has 46 call sites in a typical kernel image (more than strcpy) and is not covered by newlib OPTSPEED, making it a high-value target. Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Signed-off-by: ganjing <ganjing@xiaomi.com>
170 lines
4.3 KiB
Text
170 lines
4.3 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config RISCV_STRING_FUNCTION
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bool "Enable optimized RISC-V specific string function"
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default n
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depends on ARCH_TOOLCHAIN_GNU
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select RISCV_MEMCPY
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select RISCV_MEMSET
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select RISCV_MEMMOVE
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select RISCV_MEMCMP
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select RISCV_MEMCHR
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select RISCV_STRCMP
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select RISCV_STRLEN
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select RISCV_STRNLEN
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select RISCV_STRCPY
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select RISCV_STRNCPY
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select RISCV_STPCPY
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select RISCV_STPNCPY
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select RISCV_STRCHR
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select RISCV_STRCHRNUL
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select RISCV_STRRCHR
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select RISCV_STRNCMP
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select RISCV_STRCAT
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select RISCV_STRLCPY
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config RISCV_MEMCPY
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bool "Enable optimized memcpy() for RISC-V"
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select LIBC_ARCH_MEMCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific memcpy() library function
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config RISCV_MEMSET
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bool "Enable optimized memset() for RISC-V"
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default n
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select LIBC_ARCH_MEMSET
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific memset() library function
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config RISCV_MEMMOVE
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bool "Enable optimized memmove() for RISC-V"
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default n
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select LIBC_ARCH_MEMMOVE
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific memmove() library function
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config RISCV_MEMCMP
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bool "Enable optimized memcmp() for RISC-V"
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default n
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select LIBC_ARCH_MEMCMP
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific memcmp() library function
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config RISCV_MEMCHR
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bool "Enable optimized memchr() for RISC-V"
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default n
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select LIBC_ARCH_MEMCHR
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific memchr() library function
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config RISCV_STRCMP
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bool "Enable optimized strcmp() for RISC-V"
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default n
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select LIBC_ARCH_STRCMP
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strcmp() library function
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config RISCV_STRLEN
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bool "Enable optimized strlen() for RISC-V"
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default n
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select LIBC_ARCH_STRLEN
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strlen() library function
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config RISCV_STRNLEN
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bool "Enable optimized strnlen() for RISC-V"
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default n
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select LIBC_ARCH_STRNLEN
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strnlen() library function
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config RISCV_STRCPY
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bool "Enable optimized strcpy() for RISC-V"
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default n
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select LIBC_ARCH_STRCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strcpy() library function
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config RISCV_STRNCPY
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bool "Enable optimized strncpy() for RISC-V"
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default n
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select LIBC_ARCH_STRNCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strncpy() library function
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config RISCV_STPCPY
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bool "Enable optimized stpcpy() for RISC-V"
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default n
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select LIBC_ARCH_STPCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific stpcpy() library function
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config RISCV_STPNCPY
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bool "Enable optimized stpncpy() for RISC-V"
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default n
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select LIBC_ARCH_STPNCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific stpncpy() library function
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config RISCV_STRCHR
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bool "Enable optimized strchr() for RISC-V"
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default n
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select LIBC_ARCH_STRCHR
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strchr() library function
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config RISCV_STRCHRNUL
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bool "Enable optimized strchrnul() for RISC-V"
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default n
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select LIBC_ARCH_STRCHRNUL
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strchrnul() library function
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config RISCV_STRRCHR
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bool "Enable optimized strrchr() for RISC-V"
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default n
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select LIBC_ARCH_STRRCHR
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strrchr() library function
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config RISCV_STRNCMP
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bool "Enable optimized strncmp() for RISC-V"
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default n
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select LIBC_ARCH_STRNCMP
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strncmp() library function
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config RISCV_STRCAT
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bool "Enable optimized strcat() for RISC-V"
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default n
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select LIBC_ARCH_STRCAT
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strcat() library function
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config RISCV_STRLCPY
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bool "Enable optimized strlcpy() for RISC-V"
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default n
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select LIBC_ARCH_STRLCPY
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depends on ARCH_TOOLCHAIN_GNU
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---help---
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Enable optimized RISC-V specific strlcpy() library function
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