[Mesa-dev] [PATCH] ac: add support for gl_HelperInvocation

[Nicolai Hähnle]

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>


On 19.01.2018 00:05, Timothy Arceri wrote:
> ---
>   src/amd/common/ac_nir_to_llvm.c | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
> 
> diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
> index cf0b3d998c..4f240db4ac 100644
> --- a/src/amd/common/ac_nir_to_llvm.c
> +++ b/src/amd/common/ac_nir_to_llvm.c
> @@ -3914,6 +3914,17 @@ static void emit_discard(struct ac_nir_context *ctx,
>   	ac_build_kill_if_false(&ctx->ac, cond);
>   }
>   
> +static LLVMValueRef
> +visit_load_helper_invocation(struct ac_nir_context *ctx)
> +{
> +	LLVMValueRef result = ac_build_intrinsic(&ctx->ac,
> +						 "llvm.amdgcn.ps.live",
> +						 ctx->ac.i1, NULL, 0,
> +						 AC_FUNC_ATTR_READNONE);
> +	result = LLVMBuildNot(ctx->ac.builder, result, "");
> +	return LLVMBuildSExt(ctx->ac.builder, result, ctx->ac.i32, "");
> +}
> +
>   static LLVMValueRef
>   visit_load_local_invocation_index(struct nir_to_llvm_context *ctx)
>   {
> @@ -4316,6 +4327,9 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
>   	case nir_intrinsic_load_front_face:
>   		result = ctx->abi->front_face;
>   		break;
> +	case nir_intrinsic_load_helper_invocation:
> +		result = visit_load_helper_invocation(ctx);
> +		break;
>   	case nir_intrinsic_load_instance_id:
>   		result = ctx->abi->instance_id;
>   		break;
> 


-- 
Lerne, wie die Welt wirklich ist,
Aber vergiss niemals, wie sie sein sollte.