[PATCH v4 07/12] x86: Use -mavx instead of -msse2avx

[H.J. Lu]

On Mon, Nov 10, 2025 at 9:32 PM Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
> clang supports it from version 19 and onwards, but it should be gated
> as an option to assembler (either with -Wa or -Xassembler).  Use
> -mavx which is supported on both compilers.

This isn't clang specific.   "-msse2avx -DSSE2AVX" was used because
there were asm statements with SSE-only instructions which was fixed by

commit ff8be6152bcd1048283663aef2da6a458f27832a
Author: Uros Bizjak <ubizjak@gmail.com>
Date:   Sun Sep 21 20:33:09 2025 +0200

    x86: Use "%v" to emit VEX encoded instructions for AVX targets

Now we can simply use -mavx.

> ---
>  sysdeps/x86_64/fpu/multiarch/Makefile | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
> index 708b14297fa..145ad08207b 100644
> --- a/sysdeps/x86_64/fpu/multiarch/Makefile
> +++ b/sysdeps/x86_64/fpu/multiarch/Makefile
> @@ -150,13 +150,13 @@ CFLAGS-s_sin-fma4.c = -mfma4
>  CFLAGS-s_tan-fma4.c = -mfma4
>  CFLAGS-s_sincos-fma4.c = -mfma4
>
> -CFLAGS-e_atan2-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-e_exp-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-e_log-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-s_atan-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-s_sin-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-s_tan-avx.c = -msse2avx -DSSE2AVX
> -CFLAGS-s_sincos-avx.c = -msse2avx -DSSE2AVX
> +CFLAGS-e_atan2-avx.c = -mavx
> +CFLAGS-e_exp-avx.c = -mavx
> +CFLAGS-e_log-avx.c = -mavx
> +CFLAGS-s_atan-avx.c = -mavx
> +CFLAGS-s_sin-avx.c = -mavx
> +CFLAGS-s_tan-avx.c = -mavx
> +CFLAGS-s_sincos-avx.c = -mavx
>
>  CFLAGS-s_modf-sse4_1.c = -msse4.1 -fno-builtin-modff32x -fno-builtin-modff64
>  CFLAGS-s_modff-sse4_1.c = -msse4.1 -fno-builtin-modff32
> --
> 2.43.0
>


-- 
H.J.