diff options
Diffstat (limited to 'src/glsl/nir/nir_search.c')
| -rw-r--r-- | src/glsl/nir/nir_search.c | 379 |
1 files changed, 0 insertions, 379 deletions
diff --git a/src/glsl/nir/nir_search.c b/src/glsl/nir/nir_search.c deleted file mode 100644 index 56d7e8162f3..00000000000 --- a/src/glsl/nir/nir_search.c +++ /dev/null @@ -1,379 +0,0 @@ -/* - * Copyright © 2014 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. - * - * Authors: - * Jason Ekstrand ([email protected]) - * - */ - -#include "nir_search.h" - -struct match_state { - unsigned variables_seen; - nir_alu_src variables[NIR_SEARCH_MAX_VARIABLES]; -}; - -static bool -match_expression(const nir_search_expression *expr, nir_alu_instr *instr, - unsigned num_components, const uint8_t *swizzle, - struct match_state *state); - -static const uint8_t identity_swizzle[] = { 0, 1, 2, 3 }; - -static bool alu_instr_is_bool(nir_alu_instr *instr); - -static bool -src_is_bool(nir_src src) -{ - if (!src.is_ssa) - return false; - if (src.ssa->parent_instr->type != nir_instr_type_alu) - return false; - return alu_instr_is_bool(nir_instr_as_alu(src.ssa->parent_instr)); -} - -static bool -alu_instr_is_bool(nir_alu_instr *instr) -{ - switch (instr->op) { - case nir_op_iand: - case nir_op_ior: - case nir_op_ixor: - return src_is_bool(instr->src[0].src) && src_is_bool(instr->src[1].src); - case nir_op_inot: - return src_is_bool(instr->src[0].src); - default: - return nir_op_infos[instr->op].output_type == nir_type_bool; - } -} - -static bool -match_value(const nir_search_value *value, nir_alu_instr *instr, unsigned src, - unsigned num_components, const uint8_t *swizzle, - struct match_state *state) -{ - uint8_t new_swizzle[4]; - - /* If the source is an explicitly sized source, then we need to reset - * both the number of components and the swizzle. - */ - if (nir_op_infos[instr->op].input_sizes[src] != 0) { - num_components = nir_op_infos[instr->op].input_sizes[src]; - swizzle = identity_swizzle; - } - - for (unsigned i = 0; i < num_components; ++i) - new_swizzle[i] = instr->src[src].swizzle[swizzle[i]]; - - switch (value->type) { - case nir_search_value_expression: - if (!instr->src[src].src.is_ssa) - return false; - - if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_alu) - return false; - - return match_expression(nir_search_value_as_expression(value), - nir_instr_as_alu(instr->src[src].src.ssa->parent_instr), - num_components, new_swizzle, state); - - case nir_search_value_variable: { - nir_search_variable *var = nir_search_value_as_variable(value); - assert(var->variable < NIR_SEARCH_MAX_VARIABLES); - - if (state->variables_seen & (1 << var->variable)) { - if (!nir_srcs_equal(state->variables[var->variable].src, - instr->src[src].src)) - return false; - - assert(!instr->src[src].abs && !instr->src[src].negate); - - for (unsigned i = 0; i < num_components; ++i) { - if (state->variables[var->variable].swizzle[i] != new_swizzle[i]) - return false; - } - - return true; - } else { - if (var->is_constant && - instr->src[src].src.ssa->parent_instr->type != nir_instr_type_load_const) - return false; - - if (var->type != nir_type_invalid) { - if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_alu) - return false; - - nir_alu_instr *src_alu = - nir_instr_as_alu(instr->src[src].src.ssa->parent_instr); - - if (nir_op_infos[src_alu->op].output_type != var->type && - !(var->type == nir_type_bool && alu_instr_is_bool(src_alu))) - return false; - } - - state->variables_seen |= (1 << var->variable); - state->variables[var->variable].src = instr->src[src].src; - state->variables[var->variable].abs = false; - state->variables[var->variable].negate = false; - - for (unsigned i = 0; i < 4; ++i) { - if (i < num_components) - state->variables[var->variable].swizzle[i] = new_swizzle[i]; - else - state->variables[var->variable].swizzle[i] = 0; - } - - return true; - } - } - - case nir_search_value_constant: { - nir_search_constant *const_val = nir_search_value_as_constant(value); - - if (!instr->src[src].src.is_ssa) - return false; - - if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_load_const) - return false; - - nir_load_const_instr *load = - nir_instr_as_load_const(instr->src[src].src.ssa->parent_instr); - - switch (nir_op_infos[instr->op].input_types[src]) { - case nir_type_float: - for (unsigned i = 0; i < num_components; ++i) { - if (load->value.f[new_swizzle[i]] != const_val->data.f) - return false; - } - return true; - case nir_type_int: - case nir_type_uint: - case nir_type_bool: - for (unsigned i = 0; i < num_components; ++i) { - if (load->value.i[new_swizzle[i]] != const_val->data.i) - return false; - } - return true; - default: - unreachable("Invalid alu source type"); - } - } - - default: - unreachable("Invalid search value type"); - } -} - -static bool -match_expression(const nir_search_expression *expr, nir_alu_instr *instr, - unsigned num_components, const uint8_t *swizzle, - struct match_state *state) -{ - if (instr->op != expr->opcode) - return false; - - assert(!instr->dest.saturate); - assert(nir_op_infos[instr->op].num_inputs > 0); - - /* If we have an explicitly sized destination, we can only handle the - * identity swizzle. While dot(vec3(a, b, c).zxy) is a valid - * expression, we don't have the information right now to propagate that - * swizzle through. We can only properly propagate swizzles if the - * instruction is vectorized. - */ - if (nir_op_infos[instr->op].output_size != 0) { - for (unsigned i = 0; i < num_components; i++) { - if (swizzle[i] != i) - return false; - } - } - - /* Stash off the current variables_seen bitmask. This way we can - * restore it prior to matching in the commutative case below. - */ - unsigned variables_seen_stash = state->variables_seen; - - bool matched = true; - for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) { - if (!match_value(expr->srcs[i], instr, i, num_components, - swizzle, state)) { - matched = false; - break; - } - } - - if (matched) - return true; - - if (nir_op_infos[instr->op].algebraic_properties & NIR_OP_IS_COMMUTATIVE) { - assert(nir_op_infos[instr->op].num_inputs == 2); - - /* Restore the variables_seen bitmask. If we don't do this, then we - * could end up with an erroneous failure due to variables found in the - * first match attempt above not matching those in the second. - */ - state->variables_seen = variables_seen_stash; - - if (!match_value(expr->srcs[0], instr, 1, num_components, - swizzle, state)) - return false; - - return match_value(expr->srcs[1], instr, 0, num_components, - swizzle, state); - } else { - return false; - } -} - -static nir_alu_src -construct_value(const nir_search_value *value, nir_alu_type type, - unsigned num_components, struct match_state *state, - nir_instr *instr, void *mem_ctx) -{ - switch (value->type) { - case nir_search_value_expression: { - const nir_search_expression *expr = nir_search_value_as_expression(value); - - if (nir_op_infos[expr->opcode].output_size != 0) - num_components = nir_op_infos[expr->opcode].output_size; - - nir_alu_instr *alu = nir_alu_instr_create(mem_ctx, expr->opcode); - nir_ssa_dest_init(&alu->instr, &alu->dest.dest, num_components, NULL); - alu->dest.write_mask = (1 << num_components) - 1; - alu->dest.saturate = false; - - for (unsigned i = 0; i < nir_op_infos[expr->opcode].num_inputs; i++) { - /* If the source is an explicitly sized source, then we need to reset - * the number of components to match. - */ - if (nir_op_infos[alu->op].input_sizes[i] != 0) - num_components = nir_op_infos[alu->op].input_sizes[i]; - - alu->src[i] = construct_value(expr->srcs[i], - nir_op_infos[alu->op].input_types[i], - num_components, - state, instr, mem_ctx); - } - - nir_instr_insert_before(instr, &alu->instr); - - nir_alu_src val; - val.src = nir_src_for_ssa(&alu->dest.dest.ssa); - val.negate = false; - val.abs = false, - memcpy(val.swizzle, identity_swizzle, sizeof val.swizzle); - - return val; - } - - case nir_search_value_variable: { - const nir_search_variable *var = nir_search_value_as_variable(value); - assert(state->variables_seen & (1 << var->variable)); - - nir_alu_src val = { NIR_SRC_INIT }; - nir_alu_src_copy(&val, &state->variables[var->variable], mem_ctx); - - assert(!var->is_constant); - - return val; - } - - case nir_search_value_constant: { - const nir_search_constant *c = nir_search_value_as_constant(value); - nir_load_const_instr *load = nir_load_const_instr_create(mem_ctx, 1); - - switch (type) { - case nir_type_float: - load->def.name = ralloc_asprintf(mem_ctx, "%f", c->data.f); - load->value.f[0] = c->data.f; - break; - case nir_type_int: - load->def.name = ralloc_asprintf(mem_ctx, "%d", c->data.i); - load->value.i[0] = c->data.i; - break; - case nir_type_uint: - case nir_type_bool: - load->value.u[0] = c->data.u; - break; - default: - unreachable("Invalid alu source type"); - } - - nir_instr_insert_before(instr, &load->instr); - - nir_alu_src val; - val.src = nir_src_for_ssa(&load->def); - val.negate = false; - val.abs = false, - memset(val.swizzle, 0, sizeof val.swizzle); - - return val; - } - - default: - unreachable("Invalid search value type"); - } -} - -nir_alu_instr * -nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search, - const nir_search_value *replace, void *mem_ctx) -{ - uint8_t swizzle[4] = { 0, 0, 0, 0 }; - - for (unsigned i = 0; i < instr->dest.dest.ssa.num_components; ++i) - swizzle[i] = i; - - assert(instr->dest.dest.is_ssa); - - struct match_state state; - state.variables_seen = 0; - - if (!match_expression(search, instr, instr->dest.dest.ssa.num_components, - swizzle, &state)) - return NULL; - - /* Inserting a mov may be unnecessary. However, it's much easier to - * simply let copy propagation clean this up than to try to go through - * and rewrite swizzles ourselves. - */ - nir_alu_instr *mov = nir_alu_instr_create(mem_ctx, nir_op_imov); - mov->dest.write_mask = instr->dest.write_mask; - nir_ssa_dest_init(&mov->instr, &mov->dest.dest, - instr->dest.dest.ssa.num_components, NULL); - - mov->src[0] = construct_value(replace, nir_op_infos[instr->op].output_type, - instr->dest.dest.ssa.num_components, &state, - &instr->instr, mem_ctx); - nir_instr_insert_before(&instr->instr, &mov->instr); - - nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, - nir_src_for_ssa(&mov->dest.dest.ssa)); - - /* We know this one has no more uses because we just rewrote them all, - * so we can remove it. The rest of the matched expression, however, we - * don't know so much about. We'll just let dead code clean them up. - */ - nir_instr_remove(&instr->instr); - - return mov; -} |