[PATCH] RISC-V: Fix memcpy() for GCC 13

[Kito Cheng]

OK, thanks :)

On Wed, Jul 2, 2025 at 8:41 AM Sebastian Huber
<sebastian.huber@embedded-brains.de> wrote:
>
> GCC 13 does not define the __riscv_misaligned_* builtin defines.  They are
> supported by GCC 14 or later.  Test for __riscv_misaligned_fast to select an
> always correct memcpy() implementation for GCC 13.
>
> Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
> ---
>  newlib/libc/machine/riscv/memcpy.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/newlib/libc/machine/riscv/memcpy.c b/newlib/libc/machine/riscv/memcpy.c
> index 5d6b2f301..a27e0ecb1 100644
> --- a/newlib/libc/machine/riscv/memcpy.c
> +++ b/newlib/libc/machine/riscv/memcpy.c
> @@ -30,7 +30,7 @@ __libc_memcpy_bytewise (unsigned char *dst, const unsigned char *src,
>      *dst++ = *src++;
>  }
>
> -#if defined(__riscv_misaligned_slow) || defined(__riscv_misaligned_avoid)
> +#ifndef __riscv_misaligned_fast
>  static uintxlen_t
>  __libc_load_xlen (const void *src)
>  {
> @@ -75,7 +75,7 @@ memcpy (void *__restrict aa, const void *__restrict bb, size_t n)
>   * This uses only one aligned store for every four (or eight for XLEN == 64)
>   * bytes of data.
>   */
> -#if defined(__riscv_misaligned_slow) || defined(__riscv_misaligned_avoid)
> +#ifndef __riscv_misaligned_fast
>    if (unlikely ((((uintptr_t)a & msk) != ((uintptr_t)b & msk))))
>      {
>        size_t dst_pad = (uintptr_t)a & msk;
> --
> 2.43.0
>