[PATCH v2 00/11] newlib: RISC-V: Optimize memory and string functions for code size

[Kito Cheng]

Hi M Fally:

V2 is LGTM, thanks!

On Thu, Apr 10, 2025 at 7:27 PM m fally <marlene.fally@gmail.com> wrote:
>
> This is version two of the patch series that optimizes the size-optimized
> versions of memset(), memcpy(), memmove(), and strcmp() for the RISC-V port.
> The majority of instructions in each function will now be compressed when
> compiled with the C and (optionally) Zcb extensions.
>
> The changes to the speed-optimized path of strcmp() introduced in the first
> version of this series have been dropped, and only a small syntactic change
> to this function (replacing add instructions with addi where applicable) has
> been kept. Otherwhise, the patches in this series are identical to version one.
>
> This is the second patch series that is part of a three-month mentorship
> to optimize the RISC-V port for speed and size.
>
> Eric Salem (1):
>   RISC-V: memset() size optimized version: Use compressed registers
>
> Mahmoud Abumandour (2):
>   RISC-V: memcpy() size optimized version: Replace lb with lbu
>   RISC-V: memcpy() size optimized version: Use compressed registers
>
> m fally (8):
>   RISC-V: memmove() size optimized version: Use compressed register
>   RISC-V: memmove() size optimized version: Use compressed registers
>     only
>   RISC-V: memmove() size optimized version: Rename local labels
>   RISC-V: memmove() size optimized version: Add comments
>   RISC-V: memmove() size optimized version: Replace lb with lbu
>   RISC-V: memmove() size optimized version: Relax RAW dependency
>   RISC-V: memset() size optimized version: Rename local labels
>   RISC-V: Size optimized versions: Replace add with addi
>
>  newlib/libc/machine/riscv/memcpy-asm.S | 12 +++++------
>  newlib/libc/machine/riscv/memmove.S    | 28 +++++++++++++-------------
>  newlib/libc/machine/riscv/memset.S     | 16 +++++++--------
>  newlib/libc/machine/riscv/strcmp.S     |  4 ++--
>  4 files changed, 30 insertions(+), 30 deletions(-)
>
> --
> 2.49.0
>