On Tue, May 8, 2018 at 1:13 PM, Eric Anholt <e...@anholt.net> wrote:
> This is basically the same as the GLSL lowering path.
> ---
> src/compiler/nir/nir.h | 2 ++
> src/compiler/nir/nir_lower_alu.c | 36 ++++++++++++++++++++++++++++++++
> 2 files changed, 38 insertions(+)
>
> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
> index 5b29645a6c48..e424a01c8225 100644
> --- a/src/compiler/nir/nir.h
> +++ b/src/compiler/nir/nir.h
> @@ -1889,6 +1889,8 @@ typedef struct nir_shader_compiler_options {
> bool lower_bitfield_insert_to_shifts;
> /** Lowers bitfield_reverse to shifts. */
> bool lower_bitfield_reverse;
> + /** Lowers bit_count to shifts. */
> + bool lower_bit_count;
> /** Lowers bfm to shifts and subtracts. */
> bool lower_bfm;
> /** Lowers ifind_msb to compare and ufind_msb */
> diff --git a/src/compiler/nir/nir_lower_alu.c
> b/src/compiler/nir/nir_lower_alu.c
> index ff977f016961..4b145db7c8c6 100644
> --- a/src/compiler/nir/nir_lower_alu.c
> +++ b/src/compiler/nir/nir_lower_alu.c
> @@ -94,6 +94,42 @@ lower_alu_instr(nir_alu_instr *instr, nir_builder *b)
> }
> break;
>
> + case nir_op_bit_count:
> + if (b->shader->options->lower_bit_count) {
> + /* For more details, see:
> + *
> + *
> http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetPaallel
Looks like this is typo'd in lower_instructions.cpp as well. Might as
well fix here. s/Paallel/Parallel/
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