From 7aaddf1a342944743f65ab0c55df46f2c7d3c17f Mon Sep 17 00:00:00 2001 From: Gert Wollny Date: Mon, 6 Jul 2020 09:38:01 +0200 Subject: [PATCH] compiler/nir: rewrite lower_fragcoord_wtrans to use nir_lower_instructions This compacts the code and makes it easier to extend. Signed-off-by: Gert Wollny Reviewed-by: Andreas Baierl Reviewed-by: Eric Anholt Part-of: --- src/compiler/nir/nir.h | 2 +- src/compiler/nir/nir_lower_fragcoord_wtrans.c | 57 +++++++++++---------------- 2 files changed, 24 insertions(+), 35 deletions(-) diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index d538954..4f3df94 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -4222,7 +4222,7 @@ void nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask); bool nir_lower_io_to_vector(nir_shader *shader, nir_variable_mode mask); bool nir_lower_fragcolor(nir_shader *shader); -void nir_lower_fragcoord_wtrans(nir_shader *shader); +bool nir_lower_fragcoord_wtrans(nir_shader *shader); void nir_lower_viewport_transform(nir_shader *shader); bool nir_lower_uniforms_to_ubo(nir_shader *shader, int multiplier); diff --git a/src/compiler/nir/nir_lower_fragcoord_wtrans.c b/src/compiler/nir/nir_lower_fragcoord_wtrans.c index b8c0b0b..f469b95 100644 --- a/src/compiler/nir/nir_lower_fragcoord_wtrans.c +++ b/src/compiler/nir/nir_lower_fragcoord_wtrans.c @@ -34,48 +34,37 @@ * as a system value with PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL enabled. */ -static void -lower_fragcoord_wtrans(nir_builder *b, nir_intrinsic_instr *intr) +static bool +lower_fragcoord_wtrans_filter(const nir_instr *instr, UNUSED const void *_options) { - assert(intr->dest.is_ssa); + if (instr->type != nir_instr_type_intrinsic) + return false; - b->cursor = nir_before_instr(&intr->instr); + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); + return intr->intrinsic == nir_intrinsic_load_frag_coord; +} + +static nir_ssa_def * +lower_fragcoord_wtrans_impl(nir_builder *b, nir_instr *instr, + UNUSED void *_options) +{ + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); - nir_ssa_def *fragcoord_in = nir_load_frag_coord(b); - nir_ssa_def *w_rcp = nir_frcp(b, nir_channel(b, fragcoord_in, 3)); - nir_ssa_def *fragcoord_wtrans = nir_vec4(b, - nir_channel(b, fragcoord_in, 0), - nir_channel(b, fragcoord_in, 1), - nir_channel(b, fragcoord_in, 2), - w_rcp); - nir_ssa_def_rewrite_uses(&intr->dest.ssa, - nir_src_for_ssa(fragcoord_wtrans)); + return nir_vec4(b, + nir_channel(b, &intr->dest.ssa, 0), + nir_channel(b, &intr->dest.ssa, 1), + nir_channel(b, &intr->dest.ssa, 2), + nir_frcp(b, nir_channel(b, &intr->dest.ssa, 3))); } -void +bool nir_lower_fragcoord_wtrans(nir_shader *shader) { assert(shader->info.stage == MESA_SHADER_FRAGMENT); - nir_foreach_function(func, shader) { - if (!func->impl) - continue; - - nir_builder b; - nir_builder_init(&b, func->impl); - nir_foreach_block(block, func->impl) { - nir_foreach_instr_safe(instr, block) { - if (instr->type != nir_instr_type_intrinsic) - continue; - - nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); - if (intr->intrinsic != nir_intrinsic_load_frag_coord) - continue; + return nir_shader_lower_instructions(shader, + lower_fragcoord_wtrans_filter, + lower_fragcoord_wtrans_impl, + NULL); - lower_fragcoord_wtrans(&b, intr); - } - } - nir_metadata_preserve(func->impl, nir_metadata_block_index | - nir_metadata_dominance); - } } -- 2.7.4