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-rw-r--r--mesalib/src/glsl/ir.cpp3160
1 files changed, 1580 insertions, 1580 deletions
diff --git a/mesalib/src/glsl/ir.cpp b/mesalib/src/glsl/ir.cpp
index 95689dc10..228e23732 100644
--- a/mesalib/src/glsl/ir.cpp
+++ b/mesalib/src/glsl/ir.cpp
@@ -1,1580 +1,1580 @@
-/*
- * Copyright © 2010 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 <string.h>
-#include "main/core.h" /* for MAX2 */
-#include "ir.h"
-#include "ir_visitor.h"
-#include "glsl_types.h"
-
-ir_rvalue::ir_rvalue()
-{
- this->type = glsl_type::error_type;
-}
-
-bool ir_rvalue::is_zero() const
-{
- return false;
-}
-
-bool ir_rvalue::is_one() const
-{
- return false;
-}
-
-bool ir_rvalue::is_negative_one() const
-{
- return false;
-}
-
-/**
- * Modify the swizzle make to move one component to another
- *
- * \param m IR swizzle to be modified
- * \param from Component in the RHS that is to be swizzled
- * \param to Desired swizzle location of \c from
- */
-static void
-update_rhs_swizzle(ir_swizzle_mask &m, unsigned from, unsigned to)
-{
- switch (to) {
- case 0: m.x = from; break;
- case 1: m.y = from; break;
- case 2: m.z = from; break;
- case 3: m.w = from; break;
- default: assert(!"Should not get here.");
- }
-
- m.num_components = MAX2(m.num_components, (to + 1));
-}
-
-void
-ir_assignment::set_lhs(ir_rvalue *lhs)
-{
- void *mem_ctx = this;
- bool swizzled = false;
-
- while (lhs != NULL) {
- ir_swizzle *swiz = lhs->as_swizzle();
-
- if (swiz == NULL)
- break;
-
- unsigned write_mask = 0;
- ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
-
- for (unsigned i = 0; i < swiz->mask.num_components; i++) {
- unsigned c = 0;
-
- switch (i) {
- case 0: c = swiz->mask.x; break;
- case 1: c = swiz->mask.y; break;
- case 2: c = swiz->mask.z; break;
- case 3: c = swiz->mask.w; break;
- default: assert(!"Should not get here.");
- }
-
- write_mask |= (((this->write_mask >> i) & 1) << c);
- update_rhs_swizzle(rhs_swiz, i, c);
- }
-
- this->write_mask = write_mask;
- lhs = swiz->val;
-
- this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
- swizzled = true;
- }
-
- if (swizzled) {
- /* Now, RHS channels line up with the LHS writemask. Collapse it
- * to just the channels that will be written.
- */
- ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
- int rhs_chan = 0;
- for (int i = 0; i < 4; i++) {
- if (write_mask & (1 << i))
- update_rhs_swizzle(rhs_swiz, i, rhs_chan++);
- }
- this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
- }
-
- assert((lhs == NULL) || lhs->as_dereference());
-
- this->lhs = (ir_dereference *) lhs;
-}
-
-ir_variable *
-ir_assignment::whole_variable_written()
-{
- ir_variable *v = this->lhs->whole_variable_referenced();
-
- if (v == NULL)
- return NULL;
-
- if (v->type->is_scalar())
- return v;
-
- if (v->type->is_vector()) {
- const unsigned mask = (1U << v->type->vector_elements) - 1;
-
- if (mask != this->write_mask)
- return NULL;
- }
-
- /* Either all the vector components are assigned or the variable is some
- * composite type (and the whole thing is assigned.
- */
- return v;
-}
-
-ir_assignment::ir_assignment(ir_dereference *lhs, ir_rvalue *rhs,
- ir_rvalue *condition, unsigned write_mask)
-{
- this->ir_type = ir_type_assignment;
- this->condition = condition;
- this->rhs = rhs;
- this->lhs = lhs;
- this->write_mask = write_mask;
-
- if (lhs->type->is_scalar() || lhs->type->is_vector()) {
- int lhs_components = 0;
- for (int i = 0; i < 4; i++) {
- if (write_mask & (1 << i))
- lhs_components++;
- }
-
- assert(lhs_components == this->rhs->type->vector_elements);
- }
-}
-
-ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
- ir_rvalue *condition)
-{
- this->ir_type = ir_type_assignment;
- this->condition = condition;
- this->rhs = rhs;
-
- /* If the RHS is a vector type, assume that all components of the vector
- * type are being written to the LHS. The write mask comes from the RHS
- * because we can have a case where the LHS is a vec4 and the RHS is a
- * vec3. In that case, the assignment is:
- *
- * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
- */
- if (rhs->type->is_vector())
- this->write_mask = (1U << rhs->type->vector_elements) - 1;
- else if (rhs->type->is_scalar())
- this->write_mask = 1;
- else
- this->write_mask = 0;
-
- this->set_lhs(lhs);
-}
-
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
- ir_rvalue *op0)
-{
- assert(get_num_operands(ir_expression_operation(op)) == 1);
- this->ir_type = ir_type_expression;
- this->type = type;
- this->operation = ir_expression_operation(op);
- this->operands[0] = op0;
- this->operands[1] = NULL;
- this->operands[2] = NULL;
- this->operands[3] = NULL;
-}
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
- ir_rvalue *op0, ir_rvalue *op1)
-{
- assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))
- || (get_num_operands(ir_expression_operation(op)) == 2));
- this->ir_type = ir_type_expression;
- this->type = type;
- this->operation = ir_expression_operation(op);
- this->operands[0] = op0;
- this->operands[1] = op1;
- this->operands[2] = NULL;
- this->operands[3] = NULL;
-}
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
- ir_rvalue *op0, ir_rvalue *op1,
- ir_rvalue *op2, ir_rvalue *op3)
-{
- this->ir_type = ir_type_expression;
- this->type = type;
- this->operation = ir_expression_operation(op);
- this->operands[0] = op0;
- this->operands[1] = op1;
- this->operands[2] = op2;
- this->operands[3] = op3;
-}
-
-ir_expression::ir_expression(int op, ir_rvalue *op0)
-{
- this->ir_type = ir_type_expression;
-
- this->operation = ir_expression_operation(op);
- this->operands[0] = op0;
- this->operands[1] = NULL;
- this->operands[2] = NULL;
- this->operands[3] = NULL;
-
- assert(op <= ir_last_unop);
-
- switch (this->operation) {
- case ir_unop_bit_not:
- case ir_unop_logic_not:
- case ir_unop_neg:
- case ir_unop_abs:
- case ir_unop_sign:
- case ir_unop_rcp:
- case ir_unop_rsq:
- case ir_unop_sqrt:
- case ir_unop_exp:
- case ir_unop_log:
- case ir_unop_exp2:
- case ir_unop_log2:
- case ir_unop_trunc:
- case ir_unop_ceil:
- case ir_unop_floor:
- case ir_unop_fract:
- case ir_unop_round_even:
- case ir_unop_sin:
- case ir_unop_cos:
- case ir_unop_sin_reduced:
- case ir_unop_cos_reduced:
- case ir_unop_dFdx:
- case ir_unop_dFdy:
- this->type = op0->type;
- break;
-
- case ir_unop_f2i:
- case ir_unop_b2i:
- case ir_unop_u2i:
- this->type = glsl_type::get_instance(GLSL_TYPE_INT,
- op0->type->vector_elements, 1);
- break;
-
- case ir_unop_b2f:
- case ir_unop_i2f:
- case ir_unop_u2f:
- this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
- op0->type->vector_elements, 1);
- break;
-
- case ir_unop_f2b:
- case ir_unop_i2b:
- this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
- op0->type->vector_elements, 1);
- break;
-
- case ir_unop_i2u:
- this->type = glsl_type::get_instance(GLSL_TYPE_UINT,
- op0->type->vector_elements, 1);
- break;
-
- case ir_unop_noise:
- this->type = glsl_type::float_type;
- break;
-
- case ir_unop_any:
- this->type = glsl_type::bool_type;
- break;
-
- default:
- assert(!"not reached: missing automatic type setup for ir_expression");
- this->type = op0->type;
- break;
- }
-}
-
-ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
-{
- this->ir_type = ir_type_expression;
-
- this->operation = ir_expression_operation(op);
- this->operands[0] = op0;
- this->operands[1] = op1;
- this->operands[2] = NULL;
- this->operands[3] = NULL;
-
- assert(op > ir_last_unop);
-
- switch (this->operation) {
- case ir_binop_all_equal:
- case ir_binop_any_nequal:
- this->type = glsl_type::bool_type;
- break;
-
- case ir_binop_add:
- case ir_binop_sub:
- case ir_binop_min:
- case ir_binop_max:
- case ir_binop_pow:
- case ir_binop_mul:
- case ir_binop_div:
- case ir_binop_mod:
- if (op0->type->is_scalar()) {
- this->type = op1->type;
- } else if (op1->type->is_scalar()) {
- this->type = op0->type;
- } else {
- /* FINISHME: matrix types */
- assert(!op0->type->is_matrix() && !op1->type->is_matrix());
- assert(op0->type == op1->type);
- this->type = op0->type;
- }
- break;
-
- case ir_binop_logic_and:
- case ir_binop_logic_xor:
- case ir_binop_logic_or:
- case ir_binop_bit_and:
- case ir_binop_bit_xor:
- case ir_binop_bit_or:
- if (op0->type->is_scalar()) {
- this->type = op1->type;
- } else if (op1->type->is_scalar()) {
- this->type = op0->type;
- }
- break;
-
- case ir_binop_equal:
- case ir_binop_nequal:
- case ir_binop_lequal:
- case ir_binop_gequal:
- case ir_binop_less:
- case ir_binop_greater:
- assert(op0->type == op1->type);
- this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
- op0->type->vector_elements, 1);
- break;
-
- case ir_binop_dot:
- this->type = glsl_type::float_type;
- break;
-
- case ir_binop_lshift:
- case ir_binop_rshift:
- this->type = op0->type;
- break;
-
- default:
- assert(!"not reached: missing automatic type setup for ir_expression");
- this->type = glsl_type::float_type;
- }
-}
-
-unsigned int
-ir_expression::get_num_operands(ir_expression_operation op)
-{
- assert(op <= ir_last_opcode);
-
- if (op <= ir_last_unop)
- return 1;
-
- if (op <= ir_last_binop)
- return 2;
-
- if (op == ir_quadop_vector)
- return 4;
-
- assert(false);
- return 0;
-}
-
-static const char *const operator_strs[] = {
- "~",
- "!",
- "neg",
- "abs",
- "sign",
- "rcp",
- "rsq",
- "sqrt",
- "exp",
- "log",
- "exp2",
- "log2",
- "f2i",
- "i2f",
- "f2b",
- "b2f",
- "i2b",
- "b2i",
- "u2f",
- "i2u",
- "u2i",
- "any",
- "trunc",
- "ceil",
- "floor",
- "fract",
- "round_even",
- "sin",
- "cos",
- "sin_reduced",
- "cos_reduced",
- "dFdx",
- "dFdy",
- "noise",
- "+",
- "-",
- "*",
- "/",
- "%",
- "<",
- ">",
- "<=",
- ">=",
- "==",
- "!=",
- "all_equal",
- "any_nequal",
- "<<",
- ">>",
- "&",
- "^",
- "|",
- "&&",
- "^^",
- "||",
- "dot",
- "min",
- "max",
- "pow",
- "vector",
-};
-
-const char *ir_expression::operator_string(ir_expression_operation op)
-{
- assert((unsigned int) op < Elements(operator_strs));
- assert(Elements(operator_strs) == (ir_quadop_vector + 1));
- return operator_strs[op];
-}
-
-const char *ir_expression::operator_string()
-{
- return operator_string(this->operation);
-}
-
-const char*
-depth_layout_string(ir_depth_layout layout)
-{
- switch(layout) {
- case ir_depth_layout_none: return "";
- case ir_depth_layout_any: return "depth_any";
- case ir_depth_layout_greater: return "depth_greater";
- case ir_depth_layout_less: return "depth_less";
- case ir_depth_layout_unchanged: return "depth_unchanged";
-
- default:
- assert(0);
- return "";
- }
-}
-
-ir_expression_operation
-ir_expression::get_operator(const char *str)
-{
- const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
- for (int op = 0; op < operator_count; op++) {
- if (strcmp(str, operator_strs[op]) == 0)
- return (ir_expression_operation) op;
- }
- return (ir_expression_operation) -1;
-}
-
-ir_constant::ir_constant()
-{
- this->ir_type = ir_type_constant;
-}
-
-ir_constant::ir_constant(const struct glsl_type *type,
- const ir_constant_data *data)
-{
- assert((type->base_type >= GLSL_TYPE_UINT)
- && (type->base_type <= GLSL_TYPE_BOOL));
-
- this->ir_type = ir_type_constant;
- this->type = type;
- memcpy(& this->value, data, sizeof(this->value));
-}
-
-ir_constant::ir_constant(float f)
-{
- this->ir_type = ir_type_constant;
- this->type = glsl_type::float_type;
- this->value.f[0] = f;
- for (int i = 1; i < 16; i++) {
- this->value.f[i] = 0;
- }
-}
-
-ir_constant::ir_constant(unsigned int u)
-{
- this->ir_type = ir_type_constant;
- this->type = glsl_type::uint_type;
- this->value.u[0] = u;
- for (int i = 1; i < 16; i++) {
- this->value.u[i] = 0;
- }
-}
-
-ir_constant::ir_constant(int i)
-{
- this->ir_type = ir_type_constant;
- this->type = glsl_type::int_type;
- this->value.i[0] = i;
- for (int i = 1; i < 16; i++) {
- this->value.i[i] = 0;
- }
-}
-
-ir_constant::ir_constant(bool b)
-{
- this->ir_type = ir_type_constant;
- this->type = glsl_type::bool_type;
- this->value.b[0] = b;
- for (int i = 1; i < 16; i++) {
- this->value.b[i] = false;
- }
-}
-
-ir_constant::ir_constant(const ir_constant *c, unsigned i)
-{
- this->ir_type = ir_type_constant;
- this->type = c->type->get_base_type();
-
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
- case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
- case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
- case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
- default: assert(!"Should not get here."); break;
- }
-}
-
-ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
-{
- this->ir_type = ir_type_constant;
- this->type = type;
-
- assert(type->is_scalar() || type->is_vector() || type->is_matrix()
- || type->is_record() || type->is_array());
-
- if (type->is_array()) {
- this->array_elements = ralloc_array(this, ir_constant *, type->length);
- unsigned i = 0;
- foreach_list(node, value_list) {
- ir_constant *value = (ir_constant *) node;
- assert(value->as_constant() != NULL);
-
- this->array_elements[i++] = value;
- }
- return;
- }
-
- /* If the constant is a record, the types of each of the entries in
- * value_list must be a 1-for-1 match with the structure components. Each
- * entry must also be a constant. Just move the nodes from the value_list
- * to the list in the ir_constant.
- */
- /* FINISHME: Should there be some type checking and / or assertions here? */
- /* FINISHME: Should the new constant take ownership of the nodes from
- * FINISHME: value_list, or should it make copies?
- */
- if (type->is_record()) {
- value_list->move_nodes_to(& this->components);
- return;
- }
-
- for (unsigned i = 0; i < 16; i++) {
- this->value.u[i] = 0;
- }
-
- ir_constant *value = (ir_constant *) (value_list->head);
-
- /* Constructors with exactly one scalar argument are special for vectors
- * and matrices. For vectors, the scalar value is replicated to fill all
- * the components. For matrices, the scalar fills the components of the
- * diagonal while the rest is filled with 0.
- */
- if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
- if (type->is_matrix()) {
- /* Matrix - fill diagonal (rest is already set to 0) */
- assert(type->base_type == GLSL_TYPE_FLOAT);
- for (unsigned i = 0; i < type->matrix_columns; i++)
- this->value.f[i * type->vector_elements + i] = value->value.f[0];
- } else {
- /* Vector or scalar - fill all components */
- switch (type->base_type) {
- case GLSL_TYPE_UINT:
- case GLSL_TYPE_INT:
- for (unsigned i = 0; i < type->components(); i++)
- this->value.u[i] = value->value.u[0];
- break;
- case GLSL_TYPE_FLOAT:
- for (unsigned i = 0; i < type->components(); i++)
- this->value.f[i] = value->value.f[0];
- break;
- case GLSL_TYPE_BOOL:
- for (unsigned i = 0; i < type->components(); i++)
- this->value.b[i] = value->value.b[0];
- break;
- default:
- assert(!"Should not get here.");
- break;
- }
- }
- return;
- }
-
- if (type->is_matrix() && value->type->is_matrix()) {
- assert(value->next->is_tail_sentinel());
-
- /* From section 5.4.2 of the GLSL 1.20 spec:
- * "If a matrix is constructed from a matrix, then each component
- * (column i, row j) in the result that has a corresponding component
- * (column i, row j) in the argument will be initialized from there."
- */
- unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
- unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
- for (unsigned i = 0; i < cols; i++) {
- for (unsigned j = 0; j < rows; j++) {
- const unsigned src = i * value->type->vector_elements + j;
- const unsigned dst = i * type->vector_elements + j;
- this->value.f[dst] = value->value.f[src];
- }
- }
-
- /* "All other components will be initialized to the identity matrix." */
- for (unsigned i = cols; i < type->matrix_columns; i++)
- this->value.f[i * type->vector_elements + i] = 1.0;
-
- return;
- }
-
- /* Use each component from each entry in the value_list to initialize one
- * component of the constant being constructed.
- */
- for (unsigned i = 0; i < type->components(); /* empty */) {
- assert(value->as_constant() != NULL);
- assert(!value->is_tail_sentinel());
-
- for (unsigned j = 0; j < value->type->components(); j++) {
- switch (type->base_type) {
- case GLSL_TYPE_UINT:
- this->value.u[i] = value->get_uint_component(j);
- break;
- case GLSL_TYPE_INT:
- this->value.i[i] = value->get_int_component(j);
- break;
- case GLSL_TYPE_FLOAT:
- this->value.f[i] = value->get_float_component(j);
- break;
- case GLSL_TYPE_BOOL:
- this->value.b[i] = value->get_bool_component(j);
- break;
- default:
- /* FINISHME: What to do? Exceptions are not the answer.
- */
- break;
- }
-
- i++;
- if (i >= type->components())
- break;
- }
-
- value = (ir_constant *) value->next;
- }
-}
-
-ir_constant *
-ir_constant::zero(void *mem_ctx, const glsl_type *type)
-{
- assert(type->is_numeric() || type->is_boolean());
-
- ir_constant *c = new(mem_ctx) ir_constant;
- c->type = type;
- memset(&c->value, 0, sizeof(c->value));
-
- return c;
-}
-
-bool
-ir_constant::get_bool_component(unsigned i) const
-{
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT: return this->value.u[i] != 0;
- case GLSL_TYPE_INT: return this->value.i[i] != 0;
- case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
- case GLSL_TYPE_BOOL: return this->value.b[i];
- default: assert(!"Should not get here."); break;
- }
-
- /* Must return something to make the compiler happy. This is clearly an
- * error case.
- */
- return false;
-}
-
-float
-ir_constant::get_float_component(unsigned i) const
-{
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT: return (float) this->value.u[i];
- case GLSL_TYPE_INT: return (float) this->value.i[i];
- case GLSL_TYPE_FLOAT: return this->value.f[i];
- case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
- default: assert(!"Should not get here."); break;
- }
-
- /* Must return something to make the compiler happy. This is clearly an
- * error case.
- */
- return 0.0;
-}
-
-int
-ir_constant::get_int_component(unsigned i) const
-{
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT: return this->value.u[i];
- case GLSL_TYPE_INT: return this->value.i[i];
- case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
- case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
- default: assert(!"Should not get here."); break;
- }
-
- /* Must return something to make the compiler happy. This is clearly an
- * error case.
- */
- return 0;
-}
-
-unsigned
-ir_constant::get_uint_component(unsigned i) const
-{
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT: return this->value.u[i];
- case GLSL_TYPE_INT: return this->value.i[i];
- case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
- case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
- default: assert(!"Should not get here."); break;
- }
-
- /* Must return something to make the compiler happy. This is clearly an
- * error case.
- */
- return 0;
-}
-
-ir_constant *
-ir_constant::get_array_element(unsigned i) const
-{
- assert(this->type->is_array());
-
- /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
- *
- * "Behavior is undefined if a shader subscripts an array with an index
- * less than 0 or greater than or equal to the size the array was
- * declared with."
- *
- * Most out-of-bounds accesses are removed before things could get this far.
- * There are cases where non-constant array index values can get constant
- * folded.
- */
- if (int(i) < 0)
- i = 0;
- else if (i >= this->type->length)
- i = this->type->length - 1;
-
- return array_elements[i];
-}
-
-ir_constant *
-ir_constant::get_record_field(const char *name)
-{
- int idx = this->type->field_index(name);
-
- if (idx < 0)
- return NULL;
-
- if (this->components.is_empty())
- return NULL;
-
- exec_node *node = this->components.head;
- for (int i = 0; i < idx; i++) {
- node = node->next;
-
- /* If the end of the list is encountered before the element matching the
- * requested field is found, return NULL.
- */
- if (node->is_tail_sentinel())
- return NULL;
- }
-
- return (ir_constant *) node;
-}
-
-
-bool
-ir_constant::has_value(const ir_constant *c) const
-{
- if (this->type != c->type)
- return false;
-
- if (this->type->is_array()) {
- for (unsigned i = 0; i < this->type->length; i++) {
- if (!this->array_elements[i]->has_value(c->array_elements[i]))
- return false;
- }
- return true;
- }
-
- if (this->type->base_type == GLSL_TYPE_STRUCT) {
- const exec_node *a_node = this->components.head;
- const exec_node *b_node = c->components.head;
-
- while (!a_node->is_tail_sentinel()) {
- assert(!b_node->is_tail_sentinel());
-
- const ir_constant *const a_field = (ir_constant *) a_node;
- const ir_constant *const b_field = (ir_constant *) b_node;
-
- if (!a_field->has_value(b_field))
- return false;
-
- a_node = a_node->next;
- b_node = b_node->next;
- }
-
- return true;
- }
-
- for (unsigned i = 0; i < this->type->components(); i++) {
- switch (this->type->base_type) {
- case GLSL_TYPE_UINT:
- if (this->value.u[i] != c->value.u[i])
- return false;
- break;
- case GLSL_TYPE_INT:
- if (this->value.i[i] != c->value.i[i])
- return false;
- break;
- case GLSL_TYPE_FLOAT:
- if (this->value.f[i] != c->value.f[i])
- return false;
- break;
- case GLSL_TYPE_BOOL:
- if (this->value.b[i] != c->value.b[i])
- return false;
- break;
- default:
- assert(!"Should not get here.");
- return false;
- }
- }
-
- return true;
-}
-
-bool
-ir_constant::is_zero() const
-{
- if (!this->type->is_scalar() && !this->type->is_vector())
- return false;
-
- for (unsigned c = 0; c < this->type->vector_elements; c++) {
- switch (this->type->base_type) {
- case GLSL_TYPE_FLOAT:
- if (this->value.f[c] != 0.0)
- return false;
- break;
- case GLSL_TYPE_INT:
- if (this->value.i[c] != 0)
- return false;
- break;
- case GLSL_TYPE_UINT:
- if (this->value.u[c] != 0)
- return false;
- break;
- case GLSL_TYPE_BOOL:
- if (this->value.b[c] != false)
- return false;
- break;
- default:
- /* The only other base types are structures, arrays, and samplers.
- * Samplers cannot be constants, and the others should have been
- * filtered out above.
- */
- assert(!"Should not get here.");
- return false;
- }
- }
-
- return true;
-}
-
-bool
-ir_constant::is_one() const
-{
- if (!this->type->is_scalar() && !this->type->is_vector())
- return false;
-
- for (unsigned c = 0; c < this->type->vector_elements; c++) {
- switch (this->type->base_type) {
- case GLSL_TYPE_FLOAT:
- if (this->value.f[c] != 1.0)
- return false;
- break;
- case GLSL_TYPE_INT:
- if (this->value.i[c] != 1)
- return false;
- break;
- case GLSL_TYPE_UINT:
- if (this->value.u[c] != 1)
- return false;
- break;
- case GLSL_TYPE_BOOL:
- if (this->value.b[c] != true)
- return false;
- break;
- default:
- /* The only other base types are structures, arrays, and samplers.
- * Samplers cannot be constants, and the others should have been
- * filtered out above.
- */
- assert(!"Should not get here.");
- return false;
- }
- }
-
- return true;
-}
-
-bool
-ir_constant::is_negative_one() const
-{
- if (!this->type->is_scalar() && !this->type->is_vector())
- return false;
-
- if (this->type->is_boolean())
- return false;
-
- for (unsigned c = 0; c < this->type->vector_elements; c++) {
- switch (this->type->base_type) {
- case GLSL_TYPE_FLOAT:
- if (this->value.f[c] != -1.0)
- return false;
- break;
- case GLSL_TYPE_INT:
- if (this->value.i[c] != -1)
- return false;
- break;
- case GLSL_TYPE_UINT:
- if (int(this->value.u[c]) != -1)
- return false;
- break;
- default:
- /* The only other base types are structures, arrays, samplers, and
- * booleans. Samplers cannot be constants, and the others should
- * have been filtered out above.
- */
- assert(!"Should not get here.");
- return false;
- }
- }
-
- return true;
-}
-
-ir_loop::ir_loop()
-{
- this->ir_type = ir_type_loop;
- this->cmp = ir_unop_neg;
- this->from = NULL;
- this->to = NULL;
- this->increment = NULL;
- this->counter = NULL;
-}
-
-
-ir_dereference_variable::ir_dereference_variable(ir_variable *var)
-{
- this->ir_type = ir_type_dereference_variable;
- this->var = var;
- this->type = (var != NULL) ? var->type : glsl_type::error_type;
-}
-
-
-ir_dereference_array::ir_dereference_array(ir_rvalue *value,
- ir_rvalue *array_index)
-{
- this->ir_type = ir_type_dereference_array;
- this->array_index = array_index;
- this->set_array(value);
-}
-
-
-ir_dereference_array::ir_dereference_array(ir_variable *var,
- ir_rvalue *array_index)
-{
- void *ctx = ralloc_parent(var);
-
- this->ir_type = ir_type_dereference_array;
- this->array_index = array_index;
- this->set_array(new(ctx) ir_dereference_variable(var));
-}
-
-
-void
-ir_dereference_array::set_array(ir_rvalue *value)
-{
- this->array = value;
- this->type = glsl_type::error_type;
-
- if (this->array != NULL) {
- const glsl_type *const vt = this->array->type;
-
- if (vt->is_array()) {
- type = vt->element_type();
- } else if (vt->is_matrix()) {
- type = vt->column_type();
- } else if (vt->is_vector()) {
- type = vt->get_base_type();
- }
- }
-}
-
-
-ir_dereference_record::ir_dereference_record(ir_rvalue *value,
- const char *field)
-{
- this->ir_type = ir_type_dereference_record;
- this->record = value;
- this->field = ralloc_strdup(this, field);
- this->type = (this->record != NULL)
- ? this->record->type->field_type(field) : glsl_type::error_type;
-}
-
-
-ir_dereference_record::ir_dereference_record(ir_variable *var,
- const char *field)
-{
- void *ctx = ralloc_parent(var);
-
- this->ir_type = ir_type_dereference_record;
- this->record = new(ctx) ir_dereference_variable(var);
- this->field = ralloc_strdup(this, field);
- this->type = (this->record != NULL)
- ? this->record->type->field_type(field) : glsl_type::error_type;
-}
-
-bool type_contains_sampler(const glsl_type *type)
-{
- if (type->is_array()) {
- return type_contains_sampler(type->fields.array);
- } else if (type->is_record()) {
- for (unsigned int i = 0; i < type->length; i++) {
- if (type_contains_sampler(type->fields.structure[i].type))
- return true;
- }
- return false;
- } else {
- return type->is_sampler();
- }
-}
-
-bool
-ir_dereference::is_lvalue()
-{
- ir_variable *var = this->variable_referenced();
-
- /* Every l-value derference chain eventually ends in a variable.
- */
- if ((var == NULL) || var->read_only)
- return false;
-
- if (this->type->is_array() && !var->array_lvalue)
- return false;
-
- /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
- *
- * "Samplers cannot be treated as l-values; hence cannot be used
- * as out or inout function parameters, nor can they be
- * assigned into."
- */
- if (type_contains_sampler(this->type))
- return false;
-
- return true;
-}
-
-
-const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };
-
-const char *ir_texture::opcode_string()
-{
- assert((unsigned int) op <=
- sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
- return tex_opcode_strs[op];
-}
-
-ir_texture_opcode
-ir_texture::get_opcode(const char *str)
-{
- const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
- for (int op = 0; op < count; op++) {
- if (strcmp(str, tex_opcode_strs[op]) == 0)
- return (ir_texture_opcode) op;
- }
- return (ir_texture_opcode) -1;
-}
-
-
-void
-ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)
-{
- assert(sampler != NULL);
- assert(type != NULL);
- this->sampler = sampler;
- this->type = type;
-
- assert(sampler->type->sampler_type == (int) type->base_type);
- if (sampler->type->sampler_shadow)
- assert(type->vector_elements == 4 || type->vector_elements == 1);
- else
- assert(type->vector_elements == 4);
-}
-
-
-void
-ir_swizzle::init_mask(const unsigned *comp, unsigned count)
-{
- assert((count >= 1) && (count <= 4));
-
- memset(&this->mask, 0, sizeof(this->mask));
- this->mask.num_components = count;
-
- unsigned dup_mask = 0;
- switch (count) {
- case 4:
- assert(comp[3] <= 3);
- dup_mask |= (1U << comp[3])
- & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
- this->mask.w = comp[3];
-
- case 3:
- assert(comp[2] <= 3);
- dup_mask |= (1U << comp[2])
- & ((1U << comp[0]) | (1U << comp[1]));
- this->mask.z = comp[2];
-
- case 2:
- assert(comp[1] <= 3);
- dup_mask |= (1U << comp[1])
- & ((1U << comp[0]));
- this->mask.y = comp[1];
-
- case 1:
- assert(comp[0] <= 3);
- this->mask.x = comp[0];
- }
-
- this->mask.has_duplicates = dup_mask != 0;
-
- /* Based on the number of elements in the swizzle and the base type
- * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
- * generate the type of the resulting value.
- */
- type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
- unsigned w, unsigned count)
- : val(val)
-{
- const unsigned components[4] = { x, y, z, w };
- this->ir_type = ir_type_swizzle;
- this->init_mask(components, count);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
- unsigned count)
- : val(val)
-{
- this->ir_type = ir_type_swizzle;
- this->init_mask(comp, count);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
-{
- this->ir_type = ir_type_swizzle;
- this->val = val;
- this->mask = mask;
- this->type = glsl_type::get_instance(val->type->base_type,
- mask.num_components, 1);
-}
-
-#define X 1
-#define R 5
-#define S 9
-#define I 13
-
-ir_swizzle *
-ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
-{
- void *ctx = ralloc_parent(val);
-
- /* For each possible swizzle character, this table encodes the value in
- * \c idx_map that represents the 0th element of the vector. For invalid
- * swizzle characters (e.g., 'k'), a special value is used that will allow
- * detection of errors.
- */
- static const unsigned char base_idx[26] = {
- /* a b c d e f g h i j k l m */
- R, R, I, I, I, I, R, I, I, I, I, I, I,
- /* n o p q r s t u v w x y z */
- I, I, S, S, R, S, S, I, I, X, X, X, X
- };
-
- /* Each valid swizzle character has an entry in the previous table. This
- * table encodes the base index encoded in the previous table plus the actual
- * index of the swizzle character. When processing swizzles, the first
- * character in the string is indexed in the previous table. Each character
- * in the string is indexed in this table, and the value found there has the
- * value form the first table subtracted. The result must be on the range
- * [0,3].
- *
- * For example, the string "wzyx" will get X from the first table. Each of
- * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
- * subtraction, the swizzle values are { 3, 2, 1, 0 }.
- *
- * The string "wzrg" will get X from the first table. Each of the characters
- * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
- * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
- * [0,3], the error is detected.
- */
- static const unsigned char idx_map[26] = {
- /* a b c d e f g h i j k l m */
- R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
- /* n o p q r s t u v w x y z */
- 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
- };
-
- int swiz_idx[4] = { 0, 0, 0, 0 };
- unsigned i;
-
-
- /* Validate the first character in the swizzle string and look up the base
- * index value as described above.
- */
- if ((str[0] < 'a') || (str[0] > 'z'))
- return NULL;
-
- const unsigned base = base_idx[str[0] - 'a'];
-
-
- for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
- /* Validate the next character, and, as described above, convert it to a
- * swizzle index.
- */
- if ((str[i] < 'a') || (str[i] > 'z'))
- return NULL;
-
- swiz_idx[i] = idx_map[str[i] - 'a'] - base;
- if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
- return NULL;
- }
-
- if (str[i] != '\0')
- return NULL;
-
- return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
- swiz_idx[3], i);
-}
-
-#undef X
-#undef R
-#undef S
-#undef I
-
-ir_variable *
-ir_swizzle::variable_referenced()
-{
- return this->val->variable_referenced();
-}
-
-
-ir_variable::ir_variable(const struct glsl_type *type, const char *name,
- ir_variable_mode mode)
- : max_array_access(0), read_only(false), centroid(false), invariant(false),
- mode(mode), interpolation(ir_var_smooth), array_lvalue(false)
-{
- this->ir_type = ir_type_variable;
- this->type = type;
- this->name = ralloc_strdup(this, name);
- this->explicit_location = false;
- this->location = -1;
- this->warn_extension = NULL;
- this->constant_value = NULL;
- this->origin_upper_left = false;
- this->pixel_center_integer = false;
- this->depth_layout = ir_depth_layout_none;
- this->used = false;
-
- if (type && type->base_type == GLSL_TYPE_SAMPLER)
- this->read_only = true;
-}
-
-
-const char *
-ir_variable::interpolation_string() const
-{
- switch (this->interpolation) {
- case ir_var_smooth: return "smooth";
- case ir_var_flat: return "flat";
- case ir_var_noperspective: return "noperspective";
- }
-
- assert(!"Should not get here.");
- return "";
-}
-
-
-unsigned
-ir_variable::component_slots() const
-{
- /* FINISHME: Sparsely accessed arrays require fewer slots. */
- return this->type->component_slots();
-}
-
-
-ir_function_signature::ir_function_signature(const glsl_type *return_type)
- : return_type(return_type), is_defined(false), _function(NULL)
-{
- this->ir_type = ir_type_function_signature;
- this->is_builtin = false;
-}
-
-
-static bool
-modes_match(unsigned a, unsigned b)
-{
- if (a == b)
- return true;
-
- /* Accept "in" vs. "const in" */
- if ((a == ir_var_const_in && b == ir_var_in) ||
- (b == ir_var_const_in && a == ir_var_in))
- return true;
-
- return false;
-}
-
-
-const char *
-ir_function_signature::qualifiers_match(exec_list *params)
-{
- exec_list_iterator iter_a = parameters.iterator();
- exec_list_iterator iter_b = params->iterator();
-
- /* check that the qualifiers match. */
- while (iter_a.has_next()) {
- ir_variable *a = (ir_variable *)iter_a.get();
- ir_variable *b = (ir_variable *)iter_b.get();
-
- if (a->read_only != b->read_only ||
- !modes_match(a->mode, b->mode) ||
- a->interpolation != b->interpolation ||
- a->centroid != b->centroid) {
-
- /* parameter a's qualifiers don't match */
- return a->name;
- }
-
- iter_a.next();
- iter_b.next();
- }
- return NULL;
-}
-
-
-void
-ir_function_signature::replace_parameters(exec_list *new_params)
-{
- /* Destroy all of the previous parameter information. If the previous
- * parameter information comes from the function prototype, it may either
- * specify incorrect parameter names or not have names at all.
- */
- foreach_iter(exec_list_iterator, iter, parameters) {
- assert(((ir_instruction *) iter.get())->as_variable() != NULL);
-
- iter.remove();
- }
-
- new_params->move_nodes_to(&parameters);
-}
-
-
-ir_function::ir_function(const char *name)
-{
- this->ir_type = ir_type_function;
- this->name = ralloc_strdup(this, name);
-}
-
-
-bool
-ir_function::has_user_signature()
-{
- foreach_list(n, &this->signatures) {
- ir_function_signature *const sig = (ir_function_signature *) n;
- if (!sig->is_builtin)
- return true;
- }
- return false;
-}
-
-
-ir_call *
-ir_call::get_error_instruction(void *ctx)
-{
- ir_call *call = new(ctx) ir_call;
-
- call->type = glsl_type::error_type;
- return call;
-}
-
-void
-ir_call::set_callee(ir_function_signature *sig)
-{
- assert((this->type == NULL) || (this->type == sig->return_type));
-
- this->callee = sig;
-}
-
-void
-visit_exec_list(exec_list *list, ir_visitor *visitor)
-{
- foreach_iter(exec_list_iterator, iter, *list) {
- ((ir_instruction *)iter.get())->accept(visitor);
- }
-}
-
-
-static void
-steal_memory(ir_instruction *ir, void *new_ctx)
-{
- ir_variable *var = ir->as_variable();
- ir_constant *constant = ir->as_constant();
- if (var != NULL && var->constant_value != NULL)
- steal_memory(var->constant_value, ir);
-
- /* The components of aggregate constants are not visited by the normal
- * visitor, so steal their values by hand.
- */
- if (constant != NULL) {
- if (constant->type->is_record()) {
- foreach_iter(exec_list_iterator, iter, constant->components) {
- ir_constant *field = (ir_constant *)iter.get();
- steal_memory(field, ir);
- }
- } else if (constant->type->is_array()) {
- for (unsigned int i = 0; i < constant->type->length; i++) {
- steal_memory(constant->array_elements[i], ir);
- }
- }
- }
-
- ralloc_steal(new_ctx, ir);
-}
-
-
-void
-reparent_ir(exec_list *list, void *mem_ctx)
-{
- foreach_list(node, list) {
- visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
- }
-}
-
-
-static ir_rvalue *
-try_min_one(ir_rvalue *ir)
-{
- ir_expression *expr = ir->as_expression();
-
- if (!expr || expr->operation != ir_binop_min)
- return NULL;
-
- if (expr->operands[0]->is_one())
- return expr->operands[1];
-
- if (expr->operands[1]->is_one())
- return expr->operands[0];
-
- return NULL;
-}
-
-static ir_rvalue *
-try_max_zero(ir_rvalue *ir)
-{
- ir_expression *expr = ir->as_expression();
-
- if (!expr || expr->operation != ir_binop_max)
- return NULL;
-
- if (expr->operands[0]->is_zero())
- return expr->operands[1];
-
- if (expr->operands[1]->is_zero())
- return expr->operands[0];
-
- return NULL;
-}
-
-ir_rvalue *
-ir_rvalue::as_rvalue_to_saturate()
-{
- ir_expression *expr = this->as_expression();
-
- if (!expr)
- return NULL;
-
- ir_rvalue *max_zero = try_max_zero(expr);
- if (max_zero) {
- return try_min_one(max_zero);
- } else {
- ir_rvalue *min_one = try_min_one(expr);
- if (min_one) {
- return try_max_zero(min_one);
- }
- }
-
- return NULL;
-}
+/*
+ * Copyright © 2010 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 <string.h>
+#include "main/core.h" /* for MAX2 */
+#include "ir.h"
+#include "ir_visitor.h"
+#include "glsl_types.h"
+
+ir_rvalue::ir_rvalue()
+{
+ this->type = glsl_type::error_type;
+}
+
+bool ir_rvalue::is_zero() const
+{
+ return false;
+}
+
+bool ir_rvalue::is_one() const
+{
+ return false;
+}
+
+bool ir_rvalue::is_negative_one() const
+{
+ return false;
+}
+
+/**
+ * Modify the swizzle make to move one component to another
+ *
+ * \param m IR swizzle to be modified
+ * \param from Component in the RHS that is to be swizzled
+ * \param to Desired swizzle location of \c from
+ */
+static void
+update_rhs_swizzle(ir_swizzle_mask &m, unsigned from, unsigned to)
+{
+ switch (to) {
+ case 0: m.x = from; break;
+ case 1: m.y = from; break;
+ case 2: m.z = from; break;
+ case 3: m.w = from; break;
+ default: assert(!"Should not get here.");
+ }
+
+ m.num_components = MAX2(m.num_components, (to + 1));
+}
+
+void
+ir_assignment::set_lhs(ir_rvalue *lhs)
+{
+ void *mem_ctx = this;
+ bool swizzled = false;
+
+ while (lhs != NULL) {
+ ir_swizzle *swiz = lhs->as_swizzle();
+
+ if (swiz == NULL)
+ break;
+
+ unsigned write_mask = 0;
+ ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
+
+ for (unsigned i = 0; i < swiz->mask.num_components; i++) {
+ unsigned c = 0;
+
+ switch (i) {
+ case 0: c = swiz->mask.x; break;
+ case 1: c = swiz->mask.y; break;
+ case 2: c = swiz->mask.z; break;
+ case 3: c = swiz->mask.w; break;
+ default: assert(!"Should not get here.");
+ }
+
+ write_mask |= (((this->write_mask >> i) & 1) << c);
+ update_rhs_swizzle(rhs_swiz, i, c);
+ }
+
+ this->write_mask = write_mask;
+ lhs = swiz->val;
+
+ this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
+ swizzled = true;
+ }
+
+ if (swizzled) {
+ /* Now, RHS channels line up with the LHS writemask. Collapse it
+ * to just the channels that will be written.
+ */
+ ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
+ int rhs_chan = 0;
+ for (int i = 0; i < 4; i++) {
+ if (write_mask & (1 << i))
+ update_rhs_swizzle(rhs_swiz, i, rhs_chan++);
+ }
+ this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
+ }
+
+ assert((lhs == NULL) || lhs->as_dereference());
+
+ this->lhs = (ir_dereference *) lhs;
+}
+
+ir_variable *
+ir_assignment::whole_variable_written()
+{
+ ir_variable *v = this->lhs->whole_variable_referenced();
+
+ if (v == NULL)
+ return NULL;
+
+ if (v->type->is_scalar())
+ return v;
+
+ if (v->type->is_vector()) {
+ const unsigned mask = (1U << v->type->vector_elements) - 1;
+
+ if (mask != this->write_mask)
+ return NULL;
+ }
+
+ /* Either all the vector components are assigned or the variable is some
+ * composite type (and the whole thing is assigned.
+ */
+ return v;
+}
+
+ir_assignment::ir_assignment(ir_dereference *lhs, ir_rvalue *rhs,
+ ir_rvalue *condition, unsigned write_mask)
+{
+ this->ir_type = ir_type_assignment;
+ this->condition = condition;
+ this->rhs = rhs;
+ this->lhs = lhs;
+ this->write_mask = write_mask;
+
+ if (lhs->type->is_scalar() || lhs->type->is_vector()) {
+ int lhs_components = 0;
+ for (int i = 0; i < 4; i++) {
+ if (write_mask & (1 << i))
+ lhs_components++;
+ }
+
+ assert(lhs_components == this->rhs->type->vector_elements);
+ }
+}
+
+ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
+ ir_rvalue *condition)
+{
+ this->ir_type = ir_type_assignment;
+ this->condition = condition;
+ this->rhs = rhs;
+
+ /* If the RHS is a vector type, assume that all components of the vector
+ * type are being written to the LHS. The write mask comes from the RHS
+ * because we can have a case where the LHS is a vec4 and the RHS is a
+ * vec3. In that case, the assignment is:
+ *
+ * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
+ */
+ if (rhs->type->is_vector())
+ this->write_mask = (1U << rhs->type->vector_elements) - 1;
+ else if (rhs->type->is_scalar())
+ this->write_mask = 1;
+ else
+ this->write_mask = 0;
+
+ this->set_lhs(lhs);
+}
+
+
+ir_expression::ir_expression(int op, const struct glsl_type *type,
+ ir_rvalue *op0)
+{
+ assert(get_num_operands(ir_expression_operation(op)) == 1);
+ this->ir_type = ir_type_expression;
+ this->type = type;
+ this->operation = ir_expression_operation(op);
+ this->operands[0] = op0;
+ this->operands[1] = NULL;
+ this->operands[2] = NULL;
+ this->operands[3] = NULL;
+}
+
+ir_expression::ir_expression(int op, const struct glsl_type *type,
+ ir_rvalue *op0, ir_rvalue *op1)
+{
+ assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))
+ || (get_num_operands(ir_expression_operation(op)) == 2));
+ this->ir_type = ir_type_expression;
+ this->type = type;
+ this->operation = ir_expression_operation(op);
+ this->operands[0] = op0;
+ this->operands[1] = op1;
+ this->operands[2] = NULL;
+ this->operands[3] = NULL;
+}
+
+ir_expression::ir_expression(int op, const struct glsl_type *type,
+ ir_rvalue *op0, ir_rvalue *op1,
+ ir_rvalue *op2, ir_rvalue *op3)
+{
+ this->ir_type = ir_type_expression;
+ this->type = type;
+ this->operation = ir_expression_operation(op);
+ this->operands[0] = op0;
+ this->operands[1] = op1;
+ this->operands[2] = op2;
+ this->operands[3] = op3;
+}
+
+ir_expression::ir_expression(int op, ir_rvalue *op0)
+{
+ this->ir_type = ir_type_expression;
+
+ this->operation = ir_expression_operation(op);
+ this->operands[0] = op0;
+ this->operands[1] = NULL;
+ this->operands[2] = NULL;
+ this->operands[3] = NULL;
+
+ assert(op <= ir_last_unop);
+
+ switch (this->operation) {
+ case ir_unop_bit_not:
+ case ir_unop_logic_not:
+ case ir_unop_neg:
+ case ir_unop_abs:
+ case ir_unop_sign:
+ case ir_unop_rcp:
+ case ir_unop_rsq:
+ case ir_unop_sqrt:
+ case ir_unop_exp:
+ case ir_unop_log:
+ case ir_unop_exp2:
+ case ir_unop_log2:
+ case ir_unop_trunc:
+ case ir_unop_ceil:
+ case ir_unop_floor:
+ case ir_unop_fract:
+ case ir_unop_round_even:
+ case ir_unop_sin:
+ case ir_unop_cos:
+ case ir_unop_sin_reduced:
+ case ir_unop_cos_reduced:
+ case ir_unop_dFdx:
+ case ir_unop_dFdy:
+ this->type = op0->type;
+ break;
+
+ case ir_unop_f2i:
+ case ir_unop_b2i:
+ case ir_unop_u2i:
+ this->type = glsl_type::get_instance(GLSL_TYPE_INT,
+ op0->type->vector_elements, 1);
+ break;
+
+ case ir_unop_b2f:
+ case ir_unop_i2f:
+ case ir_unop_u2f:
+ this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
+ op0->type->vector_elements, 1);
+ break;
+
+ case ir_unop_f2b:
+ case ir_unop_i2b:
+ this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
+ op0->type->vector_elements, 1);
+ break;
+
+ case ir_unop_i2u:
+ this->type = glsl_type::get_instance(GLSL_TYPE_UINT,
+ op0->type->vector_elements, 1);
+ break;
+
+ case ir_unop_noise:
+ this->type = glsl_type::float_type;
+ break;
+
+ case ir_unop_any:
+ this->type = glsl_type::bool_type;
+ break;
+
+ default:
+ assert(!"not reached: missing automatic type setup for ir_expression");
+ this->type = op0->type;
+ break;
+ }
+}
+
+ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
+{
+ this->ir_type = ir_type_expression;
+
+ this->operation = ir_expression_operation(op);
+ this->operands[0] = op0;
+ this->operands[1] = op1;
+ this->operands[2] = NULL;
+ this->operands[3] = NULL;
+
+ assert(op > ir_last_unop);
+
+ switch (this->operation) {
+ case ir_binop_all_equal:
+ case ir_binop_any_nequal:
+ this->type = glsl_type::bool_type;
+ break;
+
+ case ir_binop_add:
+ case ir_binop_sub:
+ case ir_binop_min:
+ case ir_binop_max:
+ case ir_binop_pow:
+ case ir_binop_mul:
+ case ir_binop_div:
+ case ir_binop_mod:
+ if (op0->type->is_scalar()) {
+ this->type = op1->type;
+ } else if (op1->type->is_scalar()) {
+ this->type = op0->type;
+ } else {
+ /* FINISHME: matrix types */
+ assert(!op0->type->is_matrix() && !op1->type->is_matrix());
+ assert(op0->type == op1->type);
+ this->type = op0->type;
+ }
+ break;
+
+ case ir_binop_logic_and:
+ case ir_binop_logic_xor:
+ case ir_binop_logic_or:
+ case ir_binop_bit_and:
+ case ir_binop_bit_xor:
+ case ir_binop_bit_or:
+ if (op0->type->is_scalar()) {
+ this->type = op1->type;
+ } else if (op1->type->is_scalar()) {
+ this->type = op0->type;
+ }
+ break;
+
+ case ir_binop_equal:
+ case ir_binop_nequal:
+ case ir_binop_lequal:
+ case ir_binop_gequal:
+ case ir_binop_less:
+ case ir_binop_greater:
+ assert(op0->type == op1->type);
+ this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
+ op0->type->vector_elements, 1);
+ break;
+
+ case ir_binop_dot:
+ this->type = glsl_type::float_type;
+ break;
+
+ case ir_binop_lshift:
+ case ir_binop_rshift:
+ this->type = op0->type;
+ break;
+
+ default:
+ assert(!"not reached: missing automatic type setup for ir_expression");
+ this->type = glsl_type::float_type;
+ }
+}
+
+unsigned int
+ir_expression::get_num_operands(ir_expression_operation op)
+{
+ assert(op <= ir_last_opcode);
+
+ if (op <= ir_last_unop)
+ return 1;
+
+ if (op <= ir_last_binop)
+ return 2;
+
+ if (op == ir_quadop_vector)
+ return 4;
+
+ assert(false);
+ return 0;
+}
+
+static const char *const operator_strs[] = {
+ "~",
+ "!",
+ "neg",
+ "abs",
+ "sign",
+ "rcp",
+ "rsq",
+ "sqrt",
+ "exp",
+ "log",
+ "exp2",
+ "log2",
+ "f2i",
+ "i2f",
+ "f2b",
+ "b2f",
+ "i2b",
+ "b2i",
+ "u2f",
+ "i2u",
+ "u2i",
+ "any",
+ "trunc",
+ "ceil",
+ "floor",
+ "fract",
+ "round_even",
+ "sin",
+ "cos",
+ "sin_reduced",
+ "cos_reduced",
+ "dFdx",
+ "dFdy",
+ "noise",
+ "+",
+ "-",
+ "*",
+ "/",
+ "%",
+ "<",
+ ">",
+ "<=",
+ ">=",
+ "==",
+ "!=",
+ "all_equal",
+ "any_nequal",
+ "<<",
+ ">>",
+ "&",
+ "^",
+ "|",
+ "&&",
+ "^^",
+ "||",
+ "dot",
+ "min",
+ "max",
+ "pow",
+ "vector",
+};
+
+const char *ir_expression::operator_string(ir_expression_operation op)
+{
+ assert((unsigned int) op < Elements(operator_strs));
+ assert(Elements(operator_strs) == (ir_quadop_vector + 1));
+ return operator_strs[op];
+}
+
+const char *ir_expression::operator_string()
+{
+ return operator_string(this->operation);
+}
+
+const char*
+depth_layout_string(ir_depth_layout layout)
+{
+ switch(layout) {
+ case ir_depth_layout_none: return "";
+ case ir_depth_layout_any: return "depth_any";
+ case ir_depth_layout_greater: return "depth_greater";
+ case ir_depth_layout_less: return "depth_less";
+ case ir_depth_layout_unchanged: return "depth_unchanged";
+
+ default:
+ assert(0);
+ return "";
+ }
+}
+
+ir_expression_operation
+ir_expression::get_operator(const char *str)
+{
+ const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
+ for (int op = 0; op < operator_count; op++) {
+ if (strcmp(str, operator_strs[op]) == 0)
+ return (ir_expression_operation) op;
+ }
+ return (ir_expression_operation) -1;
+}
+
+ir_constant::ir_constant()
+{
+ this->ir_type = ir_type_constant;
+}
+
+ir_constant::ir_constant(const struct glsl_type *type,
+ const ir_constant_data *data)
+{
+ assert((type->base_type >= GLSL_TYPE_UINT)
+ && (type->base_type <= GLSL_TYPE_BOOL));
+
+ this->ir_type = ir_type_constant;
+ this->type = type;
+ memcpy(& this->value, data, sizeof(this->value));
+}
+
+ir_constant::ir_constant(float f)
+{
+ this->ir_type = ir_type_constant;
+ this->type = glsl_type::float_type;
+ this->value.f[0] = f;
+ for (int i = 1; i < 16; i++) {
+ this->value.f[i] = 0;
+ }
+}
+
+ir_constant::ir_constant(unsigned int u)
+{
+ this->ir_type = ir_type_constant;
+ this->type = glsl_type::uint_type;
+ this->value.u[0] = u;
+ for (int i = 1; i < 16; i++) {
+ this->value.u[i] = 0;
+ }
+}
+
+ir_constant::ir_constant(int i)
+{
+ this->ir_type = ir_type_constant;
+ this->type = glsl_type::int_type;
+ this->value.i[0] = i;
+ for (int i = 1; i < 16; i++) {
+ this->value.i[i] = 0;
+ }
+}
+
+ir_constant::ir_constant(bool b)
+{
+ this->ir_type = ir_type_constant;
+ this->type = glsl_type::bool_type;
+ this->value.b[0] = b;
+ for (int i = 1; i < 16; i++) {
+ this->value.b[i] = false;
+ }
+}
+
+ir_constant::ir_constant(const ir_constant *c, unsigned i)
+{
+ this->ir_type = ir_type_constant;
+ this->type = c->type->get_base_type();
+
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
+ case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
+ case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
+ case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
+ default: assert(!"Should not get here."); break;
+ }
+}
+
+ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
+{
+ this->ir_type = ir_type_constant;
+ this->type = type;
+
+ assert(type->is_scalar() || type->is_vector() || type->is_matrix()
+ || type->is_record() || type->is_array());
+
+ if (type->is_array()) {
+ this->array_elements = ralloc_array(this, ir_constant *, type->length);
+ unsigned i = 0;
+ foreach_list(node, value_list) {
+ ir_constant *value = (ir_constant *) node;
+ assert(value->as_constant() != NULL);
+
+ this->array_elements[i++] = value;
+ }
+ return;
+ }
+
+ /* If the constant is a record, the types of each of the entries in
+ * value_list must be a 1-for-1 match with the structure components. Each
+ * entry must also be a constant. Just move the nodes from the value_list
+ * to the list in the ir_constant.
+ */
+ /* FINISHME: Should there be some type checking and / or assertions here? */
+ /* FINISHME: Should the new constant take ownership of the nodes from
+ * FINISHME: value_list, or should it make copies?
+ */
+ if (type->is_record()) {
+ value_list->move_nodes_to(& this->components);
+ return;
+ }
+
+ for (unsigned i = 0; i < 16; i++) {
+ this->value.u[i] = 0;
+ }
+
+ ir_constant *value = (ir_constant *) (value_list->head);
+
+ /* Constructors with exactly one scalar argument are special for vectors
+ * and matrices. For vectors, the scalar value is replicated to fill all
+ * the components. For matrices, the scalar fills the components of the
+ * diagonal while the rest is filled with 0.
+ */
+ if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
+ if (type->is_matrix()) {
+ /* Matrix - fill diagonal (rest is already set to 0) */
+ assert(type->base_type == GLSL_TYPE_FLOAT);
+ for (unsigned i = 0; i < type->matrix_columns; i++)
+ this->value.f[i * type->vector_elements + i] = value->value.f[0];
+ } else {
+ /* Vector or scalar - fill all components */
+ switch (type->base_type) {
+ case GLSL_TYPE_UINT:
+ case GLSL_TYPE_INT:
+ for (unsigned i = 0; i < type->components(); i++)
+ this->value.u[i] = value->value.u[0];
+ break;
+ case GLSL_TYPE_FLOAT:
+ for (unsigned i = 0; i < type->components(); i++)
+ this->value.f[i] = value->value.f[0];
+ break;
+ case GLSL_TYPE_BOOL:
+ for (unsigned i = 0; i < type->components(); i++)
+ this->value.b[i] = value->value.b[0];
+ break;
+ default:
+ assert(!"Should not get here.");
+ break;
+ }
+ }
+ return;
+ }
+
+ if (type->is_matrix() && value->type->is_matrix()) {
+ assert(value->next->is_tail_sentinel());
+
+ /* From section 5.4.2 of the GLSL 1.20 spec:
+ * "If a matrix is constructed from a matrix, then each component
+ * (column i, row j) in the result that has a corresponding component
+ * (column i, row j) in the argument will be initialized from there."
+ */
+ unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
+ unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
+ for (unsigned i = 0; i < cols; i++) {
+ for (unsigned j = 0; j < rows; j++) {
+ const unsigned src = i * value->type->vector_elements + j;
+ const unsigned dst = i * type->vector_elements + j;
+ this->value.f[dst] = value->value.f[src];
+ }
+ }
+
+ /* "All other components will be initialized to the identity matrix." */
+ for (unsigned i = cols; i < type->matrix_columns; i++)
+ this->value.f[i * type->vector_elements + i] = 1.0;
+
+ return;
+ }
+
+ /* Use each component from each entry in the value_list to initialize one
+ * component of the constant being constructed.
+ */
+ for (unsigned i = 0; i < type->components(); /* empty */) {
+ assert(value->as_constant() != NULL);
+ assert(!value->is_tail_sentinel());
+
+ for (unsigned j = 0; j < value->type->components(); j++) {
+ switch (type->base_type) {
+ case GLSL_TYPE_UINT:
+ this->value.u[i] = value->get_uint_component(j);
+ break;
+ case GLSL_TYPE_INT:
+ this->value.i[i] = value->get_int_component(j);
+ break;
+ case GLSL_TYPE_FLOAT:
+ this->value.f[i] = value->get_float_component(j);
+ break;
+ case GLSL_TYPE_BOOL:
+ this->value.b[i] = value->get_bool_component(j);
+ break;
+ default:
+ /* FINISHME: What to do? Exceptions are not the answer.
+ */
+ break;
+ }
+
+ i++;
+ if (i >= type->components())
+ break;
+ }
+
+ value = (ir_constant *) value->next;
+ }
+}
+
+ir_constant *
+ir_constant::zero(void *mem_ctx, const glsl_type *type)
+{
+ assert(type->is_numeric() || type->is_boolean());
+
+ ir_constant *c = new(mem_ctx) ir_constant;
+ c->type = type;
+ memset(&c->value, 0, sizeof(c->value));
+
+ return c;
+}
+
+bool
+ir_constant::get_bool_component(unsigned i) const
+{
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT: return this->value.u[i] != 0;
+ case GLSL_TYPE_INT: return this->value.i[i] != 0;
+ case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
+ case GLSL_TYPE_BOOL: return this->value.b[i];
+ default: assert(!"Should not get here."); break;
+ }
+
+ /* Must return something to make the compiler happy. This is clearly an
+ * error case.
+ */
+ return false;
+}
+
+float
+ir_constant::get_float_component(unsigned i) const
+{
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT: return (float) this->value.u[i];
+ case GLSL_TYPE_INT: return (float) this->value.i[i];
+ case GLSL_TYPE_FLOAT: return this->value.f[i];
+ case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
+ default: assert(!"Should not get here."); break;
+ }
+
+ /* Must return something to make the compiler happy. This is clearly an
+ * error case.
+ */
+ return 0.0;
+}
+
+int
+ir_constant::get_int_component(unsigned i) const
+{
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT: return this->value.u[i];
+ case GLSL_TYPE_INT: return this->value.i[i];
+ case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
+ case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
+ default: assert(!"Should not get here."); break;
+ }
+
+ /* Must return something to make the compiler happy. This is clearly an
+ * error case.
+ */
+ return 0;
+}
+
+unsigned
+ir_constant::get_uint_component(unsigned i) const
+{
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT: return this->value.u[i];
+ case GLSL_TYPE_INT: return this->value.i[i];
+ case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
+ case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
+ default: assert(!"Should not get here."); break;
+ }
+
+ /* Must return something to make the compiler happy. This is clearly an
+ * error case.
+ */
+ return 0;
+}
+
+ir_constant *
+ir_constant::get_array_element(unsigned i) const
+{
+ assert(this->type->is_array());
+
+ /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
+ *
+ * "Behavior is undefined if a shader subscripts an array with an index
+ * less than 0 or greater than or equal to the size the array was
+ * declared with."
+ *
+ * Most out-of-bounds accesses are removed before things could get this far.
+ * There are cases where non-constant array index values can get constant
+ * folded.
+ */
+ if (int(i) < 0)
+ i = 0;
+ else if (i >= this->type->length)
+ i = this->type->length - 1;
+
+ return array_elements[i];
+}
+
+ir_constant *
+ir_constant::get_record_field(const char *name)
+{
+ int idx = this->type->field_index(name);
+
+ if (idx < 0)
+ return NULL;
+
+ if (this->components.is_empty())
+ return NULL;
+
+ exec_node *node = this->components.head;
+ for (int i = 0; i < idx; i++) {
+ node = node->next;
+
+ /* If the end of the list is encountered before the element matching the
+ * requested field is found, return NULL.
+ */
+ if (node->is_tail_sentinel())
+ return NULL;
+ }
+
+ return (ir_constant *) node;
+}
+
+
+bool
+ir_constant::has_value(const ir_constant *c) const
+{
+ if (this->type != c->type)
+ return false;
+
+ if (this->type->is_array()) {
+ for (unsigned i = 0; i < this->type->length; i++) {
+ if (!this->array_elements[i]->has_value(c->array_elements[i]))
+ return false;
+ }
+ return true;
+ }
+
+ if (this->type->base_type == GLSL_TYPE_STRUCT) {
+ const exec_node *a_node = this->components.head;
+ const exec_node *b_node = c->components.head;
+
+ while (!a_node->is_tail_sentinel()) {
+ assert(!b_node->is_tail_sentinel());
+
+ const ir_constant *const a_field = (ir_constant *) a_node;
+ const ir_constant *const b_field = (ir_constant *) b_node;
+
+ if (!a_field->has_value(b_field))
+ return false;
+
+ a_node = a_node->next;
+ b_node = b_node->next;
+ }
+
+ return true;
+ }
+
+ for (unsigned i = 0; i < this->type->components(); i++) {
+ switch (this->type->base_type) {
+ case GLSL_TYPE_UINT:
+ if (this->value.u[i] != c->value.u[i])
+ return false;
+ break;
+ case GLSL_TYPE_INT:
+ if (this->value.i[i] != c->value.i[i])
+ return false;
+ break;
+ case GLSL_TYPE_FLOAT:
+ if (this->value.f[i] != c->value.f[i])
+ return false;
+ break;
+ case GLSL_TYPE_BOOL:
+ if (this->value.b[i] != c->value.b[i])
+ return false;
+ break;
+ default:
+ assert(!"Should not get here.");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool
+ir_constant::is_zero() const
+{
+ if (!this->type->is_scalar() && !this->type->is_vector())
+ return false;
+
+ for (unsigned c = 0; c < this->type->vector_elements; c++) {
+ switch (this->type->base_type) {
+ case GLSL_TYPE_FLOAT:
+ if (this->value.f[c] != 0.0)
+ return false;
+ break;
+ case GLSL_TYPE_INT:
+ if (this->value.i[c] != 0)
+ return false;
+ break;
+ case GLSL_TYPE_UINT:
+ if (this->value.u[c] != 0)
+ return false;
+ break;
+ case GLSL_TYPE_BOOL:
+ if (this->value.b[c] != false)
+ return false;
+ break;
+ default:
+ /* The only other base types are structures, arrays, and samplers.
+ * Samplers cannot be constants, and the others should have been
+ * filtered out above.
+ */
+ assert(!"Should not get here.");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool
+ir_constant::is_one() const
+{
+ if (!this->type->is_scalar() && !this->type->is_vector())
+ return false;
+
+ for (unsigned c = 0; c < this->type->vector_elements; c++) {
+ switch (this->type->base_type) {
+ case GLSL_TYPE_FLOAT:
+ if (this->value.f[c] != 1.0)
+ return false;
+ break;
+ case GLSL_TYPE_INT:
+ if (this->value.i[c] != 1)
+ return false;
+ break;
+ case GLSL_TYPE_UINT:
+ if (this->value.u[c] != 1)
+ return false;
+ break;
+ case GLSL_TYPE_BOOL:
+ if (this->value.b[c] != true)
+ return false;
+ break;
+ default:
+ /* The only other base types are structures, arrays, and samplers.
+ * Samplers cannot be constants, and the others should have been
+ * filtered out above.
+ */
+ assert(!"Should not get here.");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool
+ir_constant::is_negative_one() const
+{
+ if (!this->type->is_scalar() && !this->type->is_vector())
+ return false;
+
+ if (this->type->is_boolean())
+ return false;
+
+ for (unsigned c = 0; c < this->type->vector_elements; c++) {
+ switch (this->type->base_type) {
+ case GLSL_TYPE_FLOAT:
+ if (this->value.f[c] != -1.0)
+ return false;
+ break;
+ case GLSL_TYPE_INT:
+ if (this->value.i[c] != -1)
+ return false;
+ break;
+ case GLSL_TYPE_UINT:
+ if (int(this->value.u[c]) != -1)
+ return false;
+ break;
+ default:
+ /* The only other base types are structures, arrays, samplers, and
+ * booleans. Samplers cannot be constants, and the others should
+ * have been filtered out above.
+ */
+ assert(!"Should not get here.");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+ir_loop::ir_loop()
+{
+ this->ir_type = ir_type_loop;
+ this->cmp = ir_unop_neg;
+ this->from = NULL;
+ this->to = NULL;
+ this->increment = NULL;
+ this->counter = NULL;
+}
+
+
+ir_dereference_variable::ir_dereference_variable(ir_variable *var)
+{
+ this->ir_type = ir_type_dereference_variable;
+ this->var = var;
+ this->type = (var != NULL) ? var->type : glsl_type::error_type;
+}
+
+
+ir_dereference_array::ir_dereference_array(ir_rvalue *value,
+ ir_rvalue *array_index)
+{
+ this->ir_type = ir_type_dereference_array;
+ this->array_index = array_index;
+ this->set_array(value);
+}
+
+
+ir_dereference_array::ir_dereference_array(ir_variable *var,
+ ir_rvalue *array_index)
+{
+ void *ctx = ralloc_parent(var);
+
+ this->ir_type = ir_type_dereference_array;
+ this->array_index = array_index;
+ this->set_array(new(ctx) ir_dereference_variable(var));
+}
+
+
+void
+ir_dereference_array::set_array(ir_rvalue *value)
+{
+ this->array = value;
+ this->type = glsl_type::error_type;
+
+ if (this->array != NULL) {
+ const glsl_type *const vt = this->array->type;
+
+ if (vt->is_array()) {
+ type = vt->element_type();
+ } else if (vt->is_matrix()) {
+ type = vt->column_type();
+ } else if (vt->is_vector()) {
+ type = vt->get_base_type();
+ }
+ }
+}
+
+
+ir_dereference_record::ir_dereference_record(ir_rvalue *value,
+ const char *field)
+{
+ this->ir_type = ir_type_dereference_record;
+ this->record = value;
+ this->field = ralloc_strdup(this, field);
+ this->type = (this->record != NULL)
+ ? this->record->type->field_type(field) : glsl_type::error_type;
+}
+
+
+ir_dereference_record::ir_dereference_record(ir_variable *var,
+ const char *field)
+{
+ void *ctx = ralloc_parent(var);
+
+ this->ir_type = ir_type_dereference_record;
+ this->record = new(ctx) ir_dereference_variable(var);
+ this->field = ralloc_strdup(this, field);
+ this->type = (this->record != NULL)
+ ? this->record->type->field_type(field) : glsl_type::error_type;
+}
+
+bool type_contains_sampler(const glsl_type *type)
+{
+ if (type->is_array()) {
+ return type_contains_sampler(type->fields.array);
+ } else if (type->is_record()) {
+ for (unsigned int i = 0; i < type->length; i++) {
+ if (type_contains_sampler(type->fields.structure[i].type))
+ return true;
+ }
+ return false;
+ } else {
+ return type->is_sampler();
+ }
+}
+
+bool
+ir_dereference::is_lvalue()
+{
+ ir_variable *var = this->variable_referenced();
+
+ /* Every l-value derference chain eventually ends in a variable.
+ */
+ if ((var == NULL) || var->read_only)
+ return false;
+
+ if (this->type->is_array() && !var->array_lvalue)
+ return false;
+
+ /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
+ *
+ * "Samplers cannot be treated as l-values; hence cannot be used
+ * as out or inout function parameters, nor can they be
+ * assigned into."
+ */
+ if (type_contains_sampler(this->type))
+ return false;
+
+ return true;
+}
+
+
+const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };
+
+const char *ir_texture::opcode_string()
+{
+ assert((unsigned int) op <=
+ sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
+ return tex_opcode_strs[op];
+}
+
+ir_texture_opcode
+ir_texture::get_opcode(const char *str)
+{
+ const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
+ for (int op = 0; op < count; op++) {
+ if (strcmp(str, tex_opcode_strs[op]) == 0)
+ return (ir_texture_opcode) op;
+ }
+ return (ir_texture_opcode) -1;
+}
+
+
+void
+ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)
+{
+ assert(sampler != NULL);
+ assert(type != NULL);
+ this->sampler = sampler;
+ this->type = type;
+
+ assert(sampler->type->sampler_type == (int) type->base_type);
+ if (sampler->type->sampler_shadow)
+ assert(type->vector_elements == 4 || type->vector_elements == 1);
+ else
+ assert(type->vector_elements == 4);
+}
+
+
+void
+ir_swizzle::init_mask(const unsigned *comp, unsigned count)
+{
+ assert((count >= 1) && (count <= 4));
+
+ memset(&this->mask, 0, sizeof(this->mask));
+ this->mask.num_components = count;
+
+ unsigned dup_mask = 0;
+ switch (count) {
+ case 4:
+ assert(comp[3] <= 3);
+ dup_mask |= (1U << comp[3])
+ & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
+ this->mask.w = comp[3];
+
+ case 3:
+ assert(comp[2] <= 3);
+ dup_mask |= (1U << comp[2])
+ & ((1U << comp[0]) | (1U << comp[1]));
+ this->mask.z = comp[2];
+
+ case 2:
+ assert(comp[1] <= 3);
+ dup_mask |= (1U << comp[1])
+ & ((1U << comp[0]));
+ this->mask.y = comp[1];
+
+ case 1:
+ assert(comp[0] <= 3);
+ this->mask.x = comp[0];
+ }
+
+ this->mask.has_duplicates = dup_mask != 0;
+
+ /* Based on the number of elements in the swizzle and the base type
+ * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
+ * generate the type of the resulting value.
+ */
+ type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
+}
+
+ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
+ unsigned w, unsigned count)
+ : val(val)
+{
+ const unsigned components[4] = { x, y, z, w };
+ this->ir_type = ir_type_swizzle;
+ this->init_mask(components, count);
+}
+
+ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
+ unsigned count)
+ : val(val)
+{
+ this->ir_type = ir_type_swizzle;
+ this->init_mask(comp, count);
+}
+
+ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
+{
+ this->ir_type = ir_type_swizzle;
+ this->val = val;
+ this->mask = mask;
+ this->type = glsl_type::get_instance(val->type->base_type,
+ mask.num_components, 1);
+}
+
+#define X 1
+#define R 5
+#define S 9
+#define I 13
+
+ir_swizzle *
+ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
+{
+ void *ctx = ralloc_parent(val);
+
+ /* For each possible swizzle character, this table encodes the value in
+ * \c idx_map that represents the 0th element of the vector. For invalid
+ * swizzle characters (e.g., 'k'), a special value is used that will allow
+ * detection of errors.
+ */
+ static const unsigned char base_idx[26] = {
+ /* a b c d e f g h i j k l m */
+ R, R, I, I, I, I, R, I, I, I, I, I, I,
+ /* n o p q r s t u v w x y z */
+ I, I, S, S, R, S, S, I, I, X, X, X, X
+ };
+
+ /* Each valid swizzle character has an entry in the previous table. This
+ * table encodes the base index encoded in the previous table plus the actual
+ * index of the swizzle character. When processing swizzles, the first
+ * character in the string is indexed in the previous table. Each character
+ * in the string is indexed in this table, and the value found there has the
+ * value form the first table subtracted. The result must be on the range
+ * [0,3].
+ *
+ * For example, the string "wzyx" will get X from the first table. Each of
+ * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
+ * subtraction, the swizzle values are { 3, 2, 1, 0 }.
+ *
+ * The string "wzrg" will get X from the first table. Each of the characters
+ * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
+ * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
+ * [0,3], the error is detected.
+ */
+ static const unsigned char idx_map[26] = {
+ /* a b c d e f g h i j k l m */
+ R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
+ /* n o p q r s t u v w x y z */
+ 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
+ };
+
+ int swiz_idx[4] = { 0, 0, 0, 0 };
+ unsigned i;
+
+
+ /* Validate the first character in the swizzle string and look up the base
+ * index value as described above.
+ */
+ if ((str[0] < 'a') || (str[0] > 'z'))
+ return NULL;
+
+ const unsigned base = base_idx[str[0] - 'a'];
+
+
+ for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
+ /* Validate the next character, and, as described above, convert it to a
+ * swizzle index.
+ */
+ if ((str[i] < 'a') || (str[i] > 'z'))
+ return NULL;
+
+ swiz_idx[i] = idx_map[str[i] - 'a'] - base;
+ if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
+ return NULL;
+ }
+
+ if (str[i] != '\0')
+ return NULL;
+
+ return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
+ swiz_idx[3], i);
+}
+
+#undef X
+#undef R
+#undef S
+#undef I
+
+ir_variable *
+ir_swizzle::variable_referenced()
+{
+ return this->val->variable_referenced();
+}
+
+
+ir_variable::ir_variable(const struct glsl_type *type, const char *name,
+ ir_variable_mode mode)
+ : max_array_access(0), read_only(false), centroid(false), invariant(false),
+ mode(mode), interpolation(ir_var_smooth), array_lvalue(false)
+{
+ this->ir_type = ir_type_variable;
+ this->type = type;
+ this->name = ralloc_strdup(this, name);
+ this->explicit_location = false;
+ this->location = -1;
+ this->warn_extension = NULL;
+ this->constant_value = NULL;
+ this->origin_upper_left = false;
+ this->pixel_center_integer = false;
+ this->depth_layout = ir_depth_layout_none;
+ this->used = false;
+
+ if (type && type->base_type == GLSL_TYPE_SAMPLER)
+ this->read_only = true;
+}
+
+
+const char *
+ir_variable::interpolation_string() const
+{
+ switch (this->interpolation) {
+ case ir_var_smooth: return "smooth";
+ case ir_var_flat: return "flat";
+ case ir_var_noperspective: return "noperspective";
+ }
+
+ assert(!"Should not get here.");
+ return "";
+}
+
+
+unsigned
+ir_variable::component_slots() const
+{
+ /* FINISHME: Sparsely accessed arrays require fewer slots. */
+ return this->type->component_slots();
+}
+
+
+ir_function_signature::ir_function_signature(const glsl_type *return_type)
+ : return_type(return_type), is_defined(false), _function(NULL)
+{
+ this->ir_type = ir_type_function_signature;
+ this->is_builtin = false;
+}
+
+
+static bool
+modes_match(unsigned a, unsigned b)
+{
+ if (a == b)
+ return true;
+
+ /* Accept "in" vs. "const in" */
+ if ((a == ir_var_const_in && b == ir_var_in) ||
+ (b == ir_var_const_in && a == ir_var_in))
+ return true;
+
+ return false;
+}
+
+
+const char *
+ir_function_signature::qualifiers_match(exec_list *params)
+{
+ exec_list_iterator iter_a = parameters.iterator();
+ exec_list_iterator iter_b = params->iterator();
+
+ /* check that the qualifiers match. */
+ while (iter_a.has_next()) {
+ ir_variable *a = (ir_variable *)iter_a.get();
+ ir_variable *b = (ir_variable *)iter_b.get();
+
+ if (a->read_only != b->read_only ||
+ !modes_match(a->mode, b->mode) ||
+ a->interpolation != b->interpolation ||
+ a->centroid != b->centroid) {
+
+ /* parameter a's qualifiers don't match */
+ return a->name;
+ }
+
+ iter_a.next();
+ iter_b.next();
+ }
+ return NULL;
+}
+
+
+void
+ir_function_signature::replace_parameters(exec_list *new_params)
+{
+ /* Destroy all of the previous parameter information. If the previous
+ * parameter information comes from the function prototype, it may either
+ * specify incorrect parameter names or not have names at all.
+ */
+ foreach_iter(exec_list_iterator, iter, parameters) {
+ assert(((ir_instruction *) iter.get())->as_variable() != NULL);
+
+ iter.remove();
+ }
+
+ new_params->move_nodes_to(&parameters);
+}
+
+
+ir_function::ir_function(const char *name)
+{
+ this->ir_type = ir_type_function;
+ this->name = ralloc_strdup(this, name);
+}
+
+
+bool
+ir_function::has_user_signature()
+{
+ foreach_list(n, &this->signatures) {
+ ir_function_signature *const sig = (ir_function_signature *) n;
+ if (!sig->is_builtin)
+ return true;
+ }
+ return false;
+}
+
+
+ir_call *
+ir_call::get_error_instruction(void *ctx)
+{
+ ir_call *call = new(ctx) ir_call;
+
+ call->type = glsl_type::error_type;
+ return call;
+}
+
+void
+ir_call::set_callee(ir_function_signature *sig)
+{
+ assert((this->type == NULL) || (this->type == sig->return_type));
+
+ this->callee = sig;
+}
+
+void
+visit_exec_list(exec_list *list, ir_visitor *visitor)
+{
+ foreach_iter(exec_list_iterator, iter, *list) {
+ ((ir_instruction *)iter.get())->accept(visitor);
+ }
+}
+
+
+static void
+steal_memory(ir_instruction *ir, void *new_ctx)
+{
+ ir_variable *var = ir->as_variable();
+ ir_constant *constant = ir->as_constant();
+ if (var != NULL && var->constant_value != NULL)
+ steal_memory(var->constant_value, ir);
+
+ /* The components of aggregate constants are not visited by the normal
+ * visitor, so steal their values by hand.
+ */
+ if (constant != NULL) {
+ if (constant->type->is_record()) {
+ foreach_iter(exec_list_iterator, iter, constant->components) {
+ ir_constant *field = (ir_constant *)iter.get();
+ steal_memory(field, ir);
+ }
+ } else if (constant->type->is_array()) {
+ for (unsigned int i = 0; i < constant->type->length; i++) {
+ steal_memory(constant->array_elements[i], ir);
+ }
+ }
+ }
+
+ ralloc_steal(new_ctx, ir);
+}
+
+
+void
+reparent_ir(exec_list *list, void *mem_ctx)
+{
+ foreach_list(node, list) {
+ visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
+ }
+}
+
+
+static ir_rvalue *
+try_min_one(ir_rvalue *ir)
+{
+ ir_expression *expr = ir->as_expression();
+
+ if (!expr || expr->operation != ir_binop_min)
+ return NULL;
+
+ if (expr->operands[0]->is_one())
+ return expr->operands[1];
+
+ if (expr->operands[1]->is_one())
+ return expr->operands[0];
+
+ return NULL;
+}
+
+static ir_rvalue *
+try_max_zero(ir_rvalue *ir)
+{
+ ir_expression *expr = ir->as_expression();
+
+ if (!expr || expr->operation != ir_binop_max)
+ return NULL;
+
+ if (expr->operands[0]->is_zero())
+ return expr->operands[1];
+
+ if (expr->operands[1]->is_zero())
+ return expr->operands[0];
+
+ return NULL;
+}
+
+ir_rvalue *
+ir_rvalue::as_rvalue_to_saturate()
+{
+ ir_expression *expr = this->as_expression();
+
+ if (!expr)
+ return NULL;
+
+ ir_rvalue *max_zero = try_max_zero(expr);
+ if (max_zero) {
+ return try_min_one(max_zero);
+ } else {
+ ir_rvalue *min_one = try_min_one(expr);
+ if (min_one) {
+ return try_max_zero(min_one);
+ }
+ }
+
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 08:46:24 +0000