Re: [PATCH v3 0/3] MR364: vkd3d-shader/hlsl: Implement inverse trigonometry.

[Giovanni Mascellani (＠giomasce)]

Giovanni Mascellani (@giomasce) commented about libs/vkd3d-shader/hlsl.y:
> - struct hlsl_type *type;
> - char *body;
> -
> - static const char template[] =
> -
>        "%s %s(%s x)\n"
> -
>        "{\n"
> -
>        "    %s abs_arg = abs(x);\n"
> -
>        "    %s correction = sqrt(1.0 - abs_arg);\n"
> -
>        "    %s result = correction * (((-0.019963376f\n"
> -
>        "        * abs_arg + 0.07612093f)\n"
> -
>        "        * abs_arg - 0.21274031f)\n"
> -
>        "        * abs_arg + 1.5707964f\n);"
> -
>        /* Piecewise, (x >= 0) ? result : pi - result. */
> -
>        "    %s mask = x >= 0.0;\n"
> -
>        "    result = mask * result\n"
> -
>        "        + (1.0 - mask) * (3.14159265 - result);\n"

Please see https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/364#note_48247.