[PATCH 1/2] RISC-V: implement private GCC library

[Leo Liang]

On Mon, Dec 01, 2025 at 06:47:04PM +0100, Heinrich Schuchardt wrote:
> [EXTERNAL MAIL]
> 
> From: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> 
> The following functions are provided:
> 
> Count leading zero bits
> 
> * int __clzsi2 (unsigned int a)
> * int __clzdi2 (unsigned long a)
> * int __clzti2 (unsigned long long a)
> 
> Count trailing zero bits
> 
> * int __ctzsi2 (unsigned int a)
> * int __ctzdi2 (unsigned long a)
> * int __ctzti2 (unsigned long long a)
> 
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> Signed-off-by: Heinrich Schuchardt <zfsdt at canonical.com>
> ---
>  arch/Kconfig            |   1 +
>  arch/riscv/lib/Makefile |   2 +
>  arch/riscv/lib/clz.c    | 105 ++++++++++++++++++++++++++++++++++++++++
>  arch/riscv/lib/ctz.c    |  95 ++++++++++++++++++++++++++++++++++++
>  lib/Kconfig             |   2 +-
>  5 files changed, 204 insertions(+), 1 deletion(-)
>  create mode 100644 arch/riscv/lib/clz.c
>  create mode 100644 arch/riscv/lib/ctz.c

Reviewed-by: Leo Yu-Chi Liang <ycliang at andestech.com>