27663dbe8e
We used to have the number of components built into the intrinsic. This meant that all of our load/store intrinsics had vec1, vec2, vec3, and vec4 variants. This lead to piles of switch statements to generate the correct intrinsic names, and introspection to figure out the number of components. We can make things much nicer by allowing "vectorized" intrinsics. Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/*
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* Copyright © 2014 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Connor Abbott (cwabbott0@gmail.com)
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*
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*/
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#include "nir.h"
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static void
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convert_instr(nir_intrinsic_instr *instr)
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{
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if (instr->intrinsic != nir_intrinsic_load_var)
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return;
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nir_variable *var = instr->variables[0]->var;
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if (var->data.mode != nir_var_system_value)
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return;
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void *mem_ctx = ralloc_parent(instr);
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nir_intrinsic_op op;
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switch (var->data.location) {
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case SYSTEM_VALUE_FRONT_FACE:
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op = nir_intrinsic_load_front_face;
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break;
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case SYSTEM_VALUE_VERTEX_ID:
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op = nir_intrinsic_load_vertex_id;
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break;
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case SYSTEM_VALUE_INSTANCE_ID:
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op = nir_intrinsic_load_instance_id;
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break;
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case SYSTEM_VALUE_SAMPLE_ID:
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op = nir_intrinsic_load_sample_id;
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break;
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case SYSTEM_VALUE_SAMPLE_POS:
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op = nir_intrinsic_load_sample_pos;
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break;
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case SYSTEM_VALUE_SAMPLE_MASK_IN:
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op = nir_intrinsic_load_sample_mask_in;
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break;
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case SYSTEM_VALUE_INVOCATION_ID:
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op = nir_intrinsic_load_invocation_id;
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break;
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default:
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assert(0);
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break;
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}
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nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op);
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new_instr->dest = nir_dest_copy(instr->dest, mem_ctx);
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nir_instr_insert_before(&instr->instr, &new_instr->instr);
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nir_instr_remove(&instr->instr);
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}
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static bool
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convert_block(nir_block *block, void *state)
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{
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(void) state;
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nir_foreach_instr_safe(block, instr) {
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if (instr->type == nir_instr_type_intrinsic)
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convert_instr(nir_instr_as_intrinsic(instr));
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}
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return true;
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}
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static void
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convert_impl(nir_function_impl *impl)
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{
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nir_foreach_block(impl, convert_block, NULL);
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}
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void
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nir_lower_system_values(nir_shader *shader)
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{
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nir_foreach_overload(shader, overload) {
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if (overload->impl)
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convert_impl(overload->impl);
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}
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exec_list_make_empty(&shader->system_values);
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}
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