[Mesa-dev] [PATCH] [RFC] gallivm: Use new LLVM fast-math-flags API

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Mon, Nov 6, 2017 at 10:09 PM, Tobias Droste <tdroste at gmx.de> wrote:
> LLVM 6 changed the API on the fast-math-flags:
> https://reviews.llvm.org/rL317488
>
> NOTE: This also enables the new flag 'ApproxFunc' to allow for
> approximations for library functions (sin, cos, ...). I'm not completly
> convinced, that this is something mesa should do.
>
> Signed-off-by: Tobias Droste <tdroste at gmx.de>
> ---
>  src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> index d988910a7e..1319407290 100644
> --- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> +++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
> @@ -830,7 +830,11 @@ lp_create_builder(LLVMContextRef ctx, enum lp_float_mode float_mode)
>        llvm::unwrap(builder)->setFastMathFlags(flags);
>        break;
>     case LP_FLOAT_MODE_UNSAFE_FP_MATH:
> +#if HAVE_LLVM >= 0x0600
> +      flags.setFast();
> +#else
>        flags.setUnsafeAlgebra();
> +#endif
>        llvm::unwrap(builder)->setFastMathFlags(flags);
>        break;
>     }
> --
> 2.14.3
>
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