> diff --git a/gcc/config/riscv/riscv_th_vector.h
> b/gcc/config/riscv/riscv_th_vector.h
> new file mode 100644
> index 00000000000..6f47e0c90a4
> --- /dev/null
> +++ b/gcc/config/riscv/riscv_th_vector.h
> @@ -0,0 +1,49 @@
> +/* RISC-V 'XTheadVector' Extension intrinsics include file.
> + Copyright (C) 2022-2023 Free Software Foundation, Inc.
> +
> + This file is part of GCC.
> +
> + GCC is free software; you can redistribute it and/or modify it
> + under the terms of the GNU General Public License as published
> + by the Free Software Foundation; either version 3, or (at your
> + option) any later version.
> +
> + GCC is distributed in the hope that it will be useful, but WITHOUT
> + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
> + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> + License for more details.
> +
> + Under Section 7 of GPL version 3, you are granted additional
> + permissions described in the GCC Runtime Library Exception, version
> + 3.1, as published by the Free Software Foundation.
> +
> + You should have received a copy of the GNU General Public License and
> + a copy of the GCC Runtime Library Exception along with this program;
> + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#ifndef __RISCV_TH_VECTOR_H
> +#define __RISCV_TH_VECTOR_H
> +
> +#include <stdint.h>
> +#include <stddef.h>
> +
> +#ifndef __riscv_xtheadvector
> +#error "XTheadVector intrinsics require the xtheadvector extension."
> +#else
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +/* NOTE: This implementation of riscv_th_vector.h is intentionally short.
> It does
> + not define the RVV types and intrinsic functions directly in C and C++
> + code, but instead uses the following pragma to tell GCC to insert the
> + necessary type and function definitions itself. The net effect is the
> + same, and the file is a complete implementation of riscv_th_vector.h. */
> +#pragma riscv intrinsic "vector"
#pragma riscv intrinsic "theadvector"
Don't reuse `#pragma riscv intrinsic "vector"` to prevent including
riscv_vector.h work with __riscv_xtheadvector.
I know we already guarded with ifndef __riscv_xtheadvector and ifndef
__riscv_vector for now,
but we eventually will remove that due to multi-version function support.
e.g.
a.c compile with -march=rv64gc
a.c:
#include <riscv_vector.h>
void foo(){
...
}
void foo_vector () __attribute__(("arch=+v"));
void foo_vector () {
// Use vector intrinsic to implement something
}
