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/*
* Copyright © 2015 Intel Corporation
*
* 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 "anv_nir.h"
#include "glsl/nir/nir_builder.h"
#include "util/ralloc.h"
/* This file includes NIR helpers used by meta shaders in the Vulkan
* driver. Eventually, these will all be merged into nir_builder.
* However, for now, keeping them in their own file helps to prevent merge
* conflicts.
*/
static inline void
nir_builder_init_simple_shader(nir_builder *b, gl_shader_stage stage)
{
b->shader = nir_shader_create(NULL, stage, NULL);
nir_function *func = nir_function_create(b->shader,
ralloc_strdup(b->shader, "main"));
nir_function_overload *overload = nir_function_overload_create(func);
overload->num_params = 0;
b->impl = nir_function_impl_create(overload);
b->cursor = nir_after_cf_list(&b->impl->body);
}
static inline void
nir_copy_var(nir_builder *build, nir_variable *dest, nir_variable *src)
{
nir_intrinsic_instr *copy =
nir_intrinsic_instr_create(build->shader, nir_intrinsic_copy_var);
copy->variables[0] = nir_deref_var_create(copy, dest);
copy->variables[1] = nir_deref_var_create(copy, src);
nir_builder_instr_insert(build, ©->instr);
}
static inline nir_variable *
nir_variable_create(nir_shader *shader, const char *name,
const struct glsl_type *type, nir_variable_mode mode)
{
nir_variable *var = rzalloc(shader, nir_variable);
var->name = ralloc_strdup(var, name);
var->type = type;
var->data.mode = mode;
if ((mode == nir_var_shader_in && shader->stage != MESA_SHADER_VERTEX) ||
(mode == nir_var_shader_out && shader->stage != MESA_SHADER_FRAGMENT))
var->data.interpolation = INTERP_QUALIFIER_SMOOTH;
switch (var->data.mode) {
case nir_var_local:
assert(!"nir_variable_create cannot be used for local variables");
break;
case nir_var_global:
exec_list_push_tail(&shader->globals, &var->node);
break;
case nir_var_shader_in:
exec_list_push_tail(&shader->inputs, &var->node);
break;
case nir_var_shader_out:
exec_list_push_tail(&shader->outputs, &var->node);
break;
case nir_var_uniform:
case nir_var_shader_storage:
exec_list_push_tail(&shader->uniforms, &var->node);
break;
case nir_var_system_value:
exec_list_push_tail(&shader->system_values, &var->node);
break;
default:
unreachable("not reached");
}
return var;
}
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