2d946634eb
Whole arrays are assignable in GLSL 1.20 and later, but it's not clear how to handle that within the IR because the IR is supposed to be shading language version agnostic.
371 lines
10 KiB
C++
371 lines
10 KiB
C++
/*
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* Copyright © 2010 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
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include "main/imports.h"
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#include "main/simple_list.h"
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#include "ir.h"
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#include "glsl_types.h"
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ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
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ir_rvalue *condition)
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: ir_rvalue()
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{
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this->lhs = lhs;
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this->rhs = rhs;
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this->condition = condition;
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}
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ir_expression::ir_expression(int op, const struct glsl_type *type,
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ir_rvalue *op0, ir_rvalue *op1)
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: ir_rvalue()
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{
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this->type = type;
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this->operation = ir_expression_operation(op);
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this->operands[0] = op0;
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this->operands[1] = op1;
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}
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unsigned int
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ir_expression::get_num_operands(void)
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{
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/* Update ir_print_visitor.cpp when updating this list. */
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const int num_operands[] = {
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1, /* ir_unop_bit_not */
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1, /* ir_unop_logic_not */
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1, /* ir_unop_neg */
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1, /* ir_unop_abs */
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1, /* ir_unop_rcp */
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1, /* ir_unop_rsq */
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1, /* ir_unop_sqrt */
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1, /* ir_unop_exp */
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1, /* ir_unop_log */
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1, /* ir_unop_exp2 */
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1, /* ir_unop_log2 */
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1, /* ir_unop_f2i */
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1, /* ir_unop_i2f */
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1, /* ir_unop_f2b */
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1, /* ir_unop_b2f */
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1, /* ir_unop_i2b */
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1, /* ir_unop_b2i */
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1, /* ir_unop_u2f */
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1, /* ir_unop_trunc */
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1, /* ir_unop_ceil */
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1, /* ir_unop_floor */
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2, /* ir_binop_add */
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2, /* ir_binop_sub */
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2, /* ir_binop_mul */
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2, /* ir_binop_div */
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2, /* ir_binop_mod */
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2, /* ir_binop_less */
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2, /* ir_binop_greater */
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2, /* ir_binop_lequal */
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2, /* ir_binop_gequal */
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2, /* ir_binop_equal */
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2, /* ir_binop_nequal */
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2, /* ir_binop_lshift */
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2, /* ir_binop_rshift */
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2, /* ir_binop_bit_and */
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2, /* ir_binop_bit_xor */
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2, /* ir_binop_bit_or */
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2, /* ir_binop_logic_and */
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2, /* ir_binop_logic_xor */
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2, /* ir_binop_logic_or */
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2, /* ir_binop_dot */
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2, /* ir_binop_min */
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2, /* ir_binop_max */
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2, /* ir_binop_pow */
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};
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assert(sizeof(num_operands) / sizeof(num_operands[0]) == ir_binop_pow + 1);
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return num_operands[this->operation];
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}
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ir_label::ir_label(const char *label)
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: ir_instruction(), label(label)
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{
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/* empty */
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}
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ir_constant::ir_constant(const struct glsl_type *type, const void *data)
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: ir_rvalue()
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{
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unsigned size = 0;
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this->type = type;
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switch (type->base_type) {
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case GLSL_TYPE_UINT: size = sizeof(this->value.u[0]); break;
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case GLSL_TYPE_INT: size = sizeof(this->value.i[0]); break;
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case GLSL_TYPE_FLOAT: size = sizeof(this->value.f[0]); break;
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case GLSL_TYPE_BOOL: size = sizeof(this->value.b[0]); break;
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default:
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/* FINISHME: What to do? Exceptions are not the answer.
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*/
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break;
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}
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memcpy(& this->value, data, size * type->components());
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}
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ir_constant::ir_constant(float f)
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: ir_rvalue()
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{
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this->type = glsl_type::float_type;
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this->value.f[0] = f;
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}
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ir_constant::ir_constant(unsigned int u)
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: ir_rvalue()
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{
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this->type = glsl_type::uint_type;
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this->value.u[0] = u;
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}
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ir_constant::ir_constant(int i)
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: ir_rvalue()
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{
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this->type = glsl_type::int_type;
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this->value.i[0] = i;
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}
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ir_constant::ir_constant(bool b)
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: ir_rvalue()
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{
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this->type = glsl_type::bool_type;
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this->value.b[0] = b;
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}
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ir_dereference::ir_dereference(ir_instruction *var)
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: ir_rvalue()
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{
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this->mode = ir_reference_variable;
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this->var = var;
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this->type = (var != NULL) ? var->type : glsl_type::error_type;
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}
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ir_dereference::ir_dereference(ir_instruction *var,
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ir_rvalue *array_index)
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: ir_rvalue(), mode(ir_reference_array),
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var(var)
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{
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type = glsl_type::error_type;
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if (var != NULL) {
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const glsl_type *const vt = var->type;
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if (vt->is_array()) {
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type = vt->element_type();
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} else if (vt->is_matrix() || vt->is_vector()) {
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type = vt->get_base_type();
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}
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}
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this->selector.array_index = array_index;
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}
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bool
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ir_dereference::is_lvalue()
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{
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if (var == NULL)
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return false;
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/* Arrays are not assignable in GLSL 1.10, but in GLSL 1.20 and later they
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* are.
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*/
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/* FINISHME: Handle GLSL 1.10 vs 1.20 differences. */
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if (this->type->base_type == GLSL_TYPE_ARRAY)
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return false;
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if (mode == ir_reference_variable) {
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ir_variable *const as_var = var->as_variable();
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if (as_var == NULL)
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return false;
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return !as_var->read_only;
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} else if (mode == ir_reference_array) {
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/* FINISHME: Walk up the dereference chain and figure out if
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* FINISHME: the variable is read-only.
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*/
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}
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return true;
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}
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ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
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unsigned w, unsigned count)
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: val(val)
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{
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assert((count >= 1) && (count <= 4));
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const unsigned dup_mask = 0
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| ((count > 1) ? ((1U << y) & ((1U << x) )) : 0)
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| ((count > 2) ? ((1U << z) & ((1U << x) | (1U << y) )) : 0)
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| ((count > 3) ? ((1U << w) & ((1U << x) | (1U << y) | (1U << z))) : 0);
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assert(x <= 3);
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assert(y <= 3);
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assert(z <= 3);
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assert(w <= 3);
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mask.x = x;
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mask.y = y;
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mask.z = z;
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mask.w = w;
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mask.num_components = count;
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mask.has_duplicates = dup_mask != 0;
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/* Based on the number of elements in the swizzle and the base type
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* (i.e., float, int, unsigned, or bool) of the vector being swizzled,
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* generate the type of the resulting value.
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*/
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type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
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}
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#define X 1
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#define R 5
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#define S 9
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#define I 13
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ir_swizzle *
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ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
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{
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/* For each possible swizzle character, this table encodes the value in
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* \c idx_map that represents the 0th element of the vector. For invalid
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* swizzle characters (e.g., 'k'), a special value is used that will allow
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* detection of errors.
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*/
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static const unsigned char base_idx[26] = {
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/* a b c d e f g h i j k l m */
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R, R, I, I, I, I, R, I, I, I, I, I, I,
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/* n o p q r s t u v w x y z */
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I, I, S, S, R, S, S, I, I, X, X, X, X
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};
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/* Each valid swizzle character has an entry in the previous table. This
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* table encodes the base index encoded in the previous table plus the actual
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* index of the swizzle character. When processing swizzles, the first
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* character in the string is indexed in the previous table. Each character
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* in the string is indexed in this table, and the value found there has the
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* value form the first table subtracted. The result must be on the range
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* [0,3].
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*
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* For example, the string "wzyx" will get X from the first table. Each of
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* the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
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* subtraction, the swizzle values are { 3, 2, 1, 0 }.
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*
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* The string "wzrg" will get X from the first table. Each of the characters
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* will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
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* swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
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* [0,3], the error is detected.
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*/
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static const unsigned char idx_map[26] = {
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/* a b c d e f g h i j k l m */
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R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
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/* n o p q r s t u v w x y z */
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0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
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};
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int swiz_idx[4] = { 0, 0, 0, 0 };
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unsigned i;
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/* Validate the first character in the swizzle string and look up the base
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* index value as described above.
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*/
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if ((str[0] < 'a') || (str[0] > 'z'))
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return NULL;
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const unsigned base = base_idx[str[0] - 'a'];
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for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
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/* Validate the next character, and, as described above, convert it to a
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* swizzle index.
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*/
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if ((str[i] < 'a') || (str[i] > 'z'))
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return NULL;
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swiz_idx[i] = idx_map[str[i] - 'a'] - base;
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if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
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return NULL;
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}
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if (str[i] != '\0')
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return NULL;
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return new ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
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swiz_idx[3], i);
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}
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#undef X
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#undef R
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#undef S
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#undef I
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ir_variable::ir_variable(const struct glsl_type *type, const char *name)
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: max_array_access(0), read_only(false), centroid(false), invariant(false),
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mode(ir_var_auto), interpolation(ir_var_smooth)
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{
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this->type = type;
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this->name = name;
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if (type && type->base_type == GLSL_TYPE_SAMPLER)
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this->read_only = true;
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}
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ir_function_signature::ir_function_signature(const glsl_type *return_type)
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: ir_instruction(), return_type(return_type), definition(NULL)
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{
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/* empty */
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}
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ir_function::ir_function(const char *name)
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: ir_instruction(), name(name)
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{
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/* empty */
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}
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ir_call *
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ir_call::get_error_instruction()
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{
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ir_call *call = new ir_call;
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call->type = glsl_type::error_type;
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return call;
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}
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