605 lines
14 KiB
C++
605 lines
14 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* \file ir_constant_expression.cpp
|
|
* Evaluate and process constant valued expressions
|
|
*
|
|
* In GLSL, constant valued expressions are used in several places. These
|
|
* must be processed and evaluated very early in the compilation process.
|
|
*
|
|
* * Sizes of arrays
|
|
* * Initializers for uniforms
|
|
* * Initializers for \c const variables
|
|
*/
|
|
|
|
#define NULL 0
|
|
#include <math.h>
|
|
#include "ir.h"
|
|
#include "ir_visitor.h"
|
|
#include "glsl_types.h"
|
|
|
|
/**
|
|
* Visitor class for evaluating constant expressions
|
|
*/
|
|
class ir_constant_visitor : public ir_visitor {
|
|
public:
|
|
ir_constant_visitor()
|
|
: value(NULL)
|
|
{
|
|
/* empty */
|
|
}
|
|
|
|
virtual ~ir_constant_visitor()
|
|
{
|
|
/* empty */
|
|
}
|
|
|
|
/**
|
|
* \name Visit methods
|
|
*
|
|
* As typical for the visitor pattern, there must be one \c visit method for
|
|
* each concrete subclass of \c ir_instruction. Virtual base classes within
|
|
* the hierarchy should not have \c visit methods.
|
|
*/
|
|
/*@{*/
|
|
virtual void visit(ir_variable *);
|
|
virtual void visit(ir_function_signature *);
|
|
virtual void visit(ir_function *);
|
|
virtual void visit(ir_expression *);
|
|
virtual void visit(ir_texture *);
|
|
virtual void visit(ir_swizzle *);
|
|
virtual void visit(ir_dereference_variable *);
|
|
virtual void visit(ir_dereference_array *);
|
|
virtual void visit(ir_dereference_record *);
|
|
virtual void visit(ir_assignment *);
|
|
virtual void visit(ir_constant *);
|
|
virtual void visit(ir_call *);
|
|
virtual void visit(ir_return *);
|
|
virtual void visit(ir_if *);
|
|
virtual void visit(ir_loop *);
|
|
virtual void visit(ir_loop_jump *);
|
|
/*@}*/
|
|
|
|
/**
|
|
* Value of the constant expression.
|
|
*
|
|
* \note
|
|
* This field will be \c NULL if the expression is not constant valued.
|
|
*/
|
|
/* FINIHSME: This cannot hold values for constant arrays or structures. */
|
|
ir_constant *value;
|
|
};
|
|
|
|
|
|
ir_constant *
|
|
ir_instruction::constant_expression_value()
|
|
{
|
|
ir_constant_visitor visitor;
|
|
|
|
this->accept(& visitor);
|
|
return visitor.value;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_variable *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_function_signature *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_function *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_expression *ir)
|
|
{
|
|
value = NULL;
|
|
ir_constant *op[2];
|
|
unsigned int operand, c;
|
|
unsigned u[16];
|
|
int i[16];
|
|
float f[16];
|
|
bool b[16];
|
|
const glsl_type *type = NULL;
|
|
|
|
for (operand = 0; operand < ir->get_num_operands(); operand++) {
|
|
op[operand] = ir->operands[operand]->constant_expression_value();
|
|
if (!op[operand])
|
|
return;
|
|
}
|
|
|
|
switch (ir->operation) {
|
|
case ir_unop_logic_not:
|
|
type = ir->operands[0]->type;
|
|
assert(type->base_type == GLSL_TYPE_BOOL);
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++)
|
|
b[c] = !op[0]->value.b[c];
|
|
break;
|
|
|
|
case ir_unop_f2i:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
i[c] = op[0]->value.f[c];
|
|
}
|
|
break;
|
|
case ir_unop_i2f:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_UINT ||
|
|
op[0]->type->base_type == GLSL_TYPE_INT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
if (op[0]->type->base_type == GLSL_TYPE_INT)
|
|
f[c] = op[0]->value.i[c];
|
|
else
|
|
f[c] = op[0]->value.u[c];
|
|
}
|
|
break;
|
|
|
|
case ir_unop_neg:
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = -op[0]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = -op[0]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = -op[0]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ir_unop_abs:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = op[0]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = op[0]->value.i[c];
|
|
if (i[c] < 0)
|
|
i[c] = -i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = fabs(op[0]->value.f[c]);
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ir_unop_rcp:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
if (op[0]->value.u[c] != 0.0)
|
|
u[c] = 1 / op[0]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
if (op[0]->value.i[c] != 0.0)
|
|
i[c] = 1 / op[0]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
if (op[0]->value.f[c] != 0.0)
|
|
f[c] = 1.0 / op[0]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ir_unop_rsq:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
f[c] = 1.0 / sqrtf(op[0]->value.f[c]);
|
|
}
|
|
break;
|
|
|
|
case ir_unop_sqrt:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
f[c] = sqrtf(op[0]->value.f[c]);
|
|
}
|
|
break;
|
|
|
|
case ir_unop_exp:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
f[c] = expf(op[0]->value.f[c]);
|
|
}
|
|
break;
|
|
|
|
case ir_unop_log:
|
|
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
|
|
type = ir->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
f[c] = logf(op[0]->value.f[c]);
|
|
}
|
|
break;
|
|
|
|
case ir_binop_add:
|
|
if (ir->operands[0]->type == ir->operands[1]->type) {
|
|
type = ir->operands[0]->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = op[0]->value.u[c] + op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = op[0]->value.i[c] + op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = op[0]->value.f[c] + op[1]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case ir_binop_sub:
|
|
if (ir->operands[0]->type == ir->operands[1]->type) {
|
|
type = ir->operands[0]->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = op[0]->value.u[c] - op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = op[0]->value.i[c] - op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = op[0]->value.f[c] - op[1]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case ir_binop_mul:
|
|
if (ir->operands[0]->type == ir->operands[1]->type &&
|
|
!ir->operands[0]->type->is_matrix()) {
|
|
type = ir->operands[0]->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = op[0]->value.u[c] * op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = op[0]->value.i[c] * op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = op[0]->value.f[c] * op[1]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case ir_binop_div:
|
|
if (ir->operands[0]->type == ir->operands[1]->type) {
|
|
type = ir->operands[0]->type;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
u[c] = op[0]->value.u[c] / op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
i[c] = op[0]->value.i[c] / op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
f[c] = op[0]->value.f[c] / op[1]->value.f[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case ir_binop_logic_and:
|
|
type = ir->operands[0]->type;
|
|
assert(type->base_type == GLSL_TYPE_BOOL);
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++)
|
|
b[c] = op[0]->value.b[c] && op[1]->value.b[c];
|
|
break;
|
|
case ir_binop_logic_xor:
|
|
type = ir->operands[0]->type;
|
|
assert(type->base_type == GLSL_TYPE_BOOL);
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++)
|
|
b[c] = op[0]->value.b[c] ^ op[1]->value.b[c];
|
|
break;
|
|
case ir_binop_logic_or:
|
|
type = ir->operands[0]->type;
|
|
assert(type->base_type == GLSL_TYPE_BOOL);
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++)
|
|
b[c] = op[0]->value.b[c] || op[1]->value.b[c];
|
|
break;
|
|
|
|
case ir_binop_less:
|
|
type = glsl_type::bool_type;
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = op[0]->value.u[0] < op[1]->value.u[0];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = op[0]->value.i[0] < op[1]->value.i[0];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = op[0]->value.f[0] < op[1]->value.f[0];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
break;
|
|
case ir_binop_greater:
|
|
type = glsl_type::bool_type;
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = op[0]->value.u[0] > op[1]->value.u[0];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = op[0]->value.i[0] > op[1]->value.i[0];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = op[0]->value.f[0] > op[1]->value.f[0];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
break;
|
|
case ir_binop_lequal:
|
|
type = glsl_type::bool_type;
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = op[0]->value.u[0] <= op[1]->value.u[0];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = op[0]->value.i[0] <= op[1]->value.i[0];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = op[0]->value.f[0] <= op[1]->value.f[0];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
break;
|
|
case ir_binop_gequal:
|
|
type = glsl_type::bool_type;
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = op[0]->value.u[0] >= op[1]->value.u[0];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = op[0]->value.i[0] >= op[1]->value.i[0];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = op[0]->value.f[0] >= op[1]->value.f[0];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
break;
|
|
|
|
case ir_binop_equal:
|
|
if (ir->operands[0]->type == ir->operands[1]->type) {
|
|
type = glsl_type::bool_type;
|
|
b[0] = true;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = b[0] && op[0]->value.u[c] == op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = b[0] && op[0]->value.i[c] == op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = b[0] && op[0]->value.f[c] == op[1]->value.f[c];
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
b[0] = b[0] && op[0]->value.b[c] == op[1]->value.b[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case ir_binop_nequal:
|
|
if (ir->operands[0]->type == ir->operands[1]->type) {
|
|
type = glsl_type::bool_type;
|
|
b[0] = false;
|
|
for (c = 0; c < ir->operands[0]->type->components(); c++) {
|
|
switch (ir->operands[0]->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
b[0] = b[0] || op[0]->value.u[c] != op[1]->value.u[c];
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
b[0] = b[0] || op[0]->value.i[c] != op[1]->value.i[c];
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
b[0] = b[0] || op[0]->value.f[c] != op[1]->value.f[c];
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
b[0] = b[0] || op[0]->value.b[c] != op[1]->value.b[c];
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (type) {
|
|
switch (type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
value = new ir_constant(type, u);
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
value = new ir_constant(type, i);
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
value = new ir_constant(type, f);
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
value = new ir_constant(type, b);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_texture *ir)
|
|
{
|
|
// FINISHME: Do stuff with texture lookups
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_swizzle *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_dereference_variable *ir)
|
|
{
|
|
value = NULL;
|
|
|
|
ir_variable *var = ir->variable_referenced();
|
|
if (var && var->constant_value)
|
|
value = new ir_constant(ir->type, &var->constant_value->value);
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_dereference_array *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
/* FINISHME: Other dereference modes. */
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_dereference_record *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
/* FINISHME: Other dereference modes. */
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_assignment *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_constant *ir)
|
|
{
|
|
value = ir;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_call *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_return *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_if *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_loop *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
ir_constant_visitor::visit(ir_loop_jump *ir)
|
|
{
|
|
(void) ir;
|
|
value = NULL;
|
|
}
|