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/*
* Copyright (c) 2019 Qiang Yu <yuq825@gmail.com>
*
* 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, sub license,
* 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 NON-INFRINGEMENT. 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.h"
#include "nir_builder.h"
#include "lima_ir.h"
static void
lower_load_uniform_to_scalar(nir_builder *b, nir_intrinsic_instr *intr)
{
b->cursor = nir_before_instr(&intr->instr);
nir_ssa_def *loads[4];
for (unsigned i = 0; i < intr->num_components; i++) {
nir_intrinsic_instr *chan_intr =
nir_intrinsic_instr_create(b->shader, intr->intrinsic);
nir_ssa_dest_init(&chan_intr->instr, &chan_intr->dest,
1, intr->dest.ssa.bit_size, NULL);
chan_intr->num_components = 1;
nir_intrinsic_set_base(chan_intr, nir_intrinsic_base(intr) * 4 + i);
nir_intrinsic_set_range(chan_intr, nir_intrinsic_range(intr) * 4);
nir_intrinsic_set_type(chan_intr, nir_intrinsic_type(intr));
chan_intr->src[0] =
nir_src_for_ssa(nir_imul_imm(b, intr->src[0].ssa, 4));
nir_builder_instr_insert(b, &chan_intr->instr);
loads[i] = &chan_intr->dest.ssa;
}
nir_ssa_def_rewrite_uses(&intr->dest.ssa,
nir_src_for_ssa(nir_vec(b, loads,
intr->num_components)));
nir_instr_remove(&intr->instr);
}
void
lima_nir_lower_uniform_to_scalar(nir_shader *shader)
{
nir_foreach_function(function, shader) {
if (function->impl) {
nir_builder b;
nir_builder_init(&b, function->impl);
nir_foreach_block(block, function->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_uniform)
continue;
lower_load_uniform_to_scalar(&b, intr);
}
}
}
}
}
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