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/*
* Copyright © 2022 Imagination Technologies Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "nir/nir.h"
#include "nir/nir_builder.h"
#include "nir/nir_search_helpers.h"
#include "rogue.h"
#include "util/macros.h"
/**
* \file rogue_nir_pfo.c
*
* \brief Contains the rogue_nir_pfo pass.
*/
static void insert_pfo(nir_builder *b,
nir_intrinsic_instr *store_output,
nir_src *output_src)
{
/* TODO: Support complex PFO with blending. */
/* TODO: Verify type is vec4. */
/* Pack the output color components into U8888 format. */
nir_ssa_def *new_output_src_ssa = nir_pack_unorm_4x8(b, output_src->ssa);
nir_src new_output_src = nir_src_for_ssa(new_output_src_ssa);
/* Update the store_output intrinsic. */
nir_instr_rewrite_src(&store_output->instr, output_src, new_output_src);
nir_intrinsic_set_write_mask(store_output, 1);
store_output->num_components = 1;
nir_intrinsic_set_src_type(store_output, nir_type_uint32);
}
PUBLIC
void rogue_nir_pfo(nir_shader *shader)
{
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_builder b;
/* Only apply to fragment shaders. */
if (shader->info.stage != MESA_SHADER_FRAGMENT)
return;
nir_builder_init(&b, impl);
nir_foreach_block (block, impl) {
nir_foreach_instr_safe (instr, block) {
if (instr->type == nir_instr_type_intrinsic) {
/* Find the store_output intrinsic and pack the output value. */
nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
if (intr->intrinsic != nir_intrinsic_store_output)
continue;
b.cursor = nir_before_instr(&intr->instr);
insert_pfo(&b, intr, &intr->src[0]);
} else if (instr->type == nir_instr_type_deref) {
/* Find variable derefs and update their type. */
nir_deref_instr *deref = nir_instr_as_deref(instr);
if (!nir_deref_mode_is(deref, nir_var_shader_out))
continue;
if (deref->deref_type != nir_deref_type_var)
continue;
nir_variable *out = nir_deref_instr_get_variable(deref);
deref->type = glsl_uintN_t_type(32);
out->type = glsl_uintN_t_type(32);
}
}
}
}
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