1847 lines
63 KiB
C++
1847 lines
63 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "glsl_symbol_table.h"
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#include "ast.h"
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#include "glsl_types.h"
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#include "ir.h"
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#include "main/core.h" /* for MIN2 */
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static ir_rvalue *
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convert_component(ir_rvalue *src, const glsl_type *desired_type);
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bool
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apply_implicit_conversion(const glsl_type *to, ir_rvalue * &from,
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struct _mesa_glsl_parse_state *state);
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static unsigned
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process_parameters(exec_list *instructions, exec_list *actual_parameters,
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exec_list *parameters,
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struct _mesa_glsl_parse_state *state)
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{
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unsigned count = 0;
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foreach_list_typed(ast_node, ast, link, parameters) {
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ir_rvalue *result = ast->hir(instructions, state);
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ir_constant *const constant = result->constant_expression_value();
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if (constant != NULL)
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result = constant;
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actual_parameters->push_tail(result);
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count++;
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}
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return count;
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}
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/**
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* Generate a source prototype for a function signature
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*
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* \param return_type Return type of the function. May be \c NULL.
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* \param name Name of the function.
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* \param parameters List of \c ir_instruction nodes representing the
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* parameter list for the function. This may be either a
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* formal (\c ir_variable) or actual (\c ir_rvalue)
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* parameter list. Only the type is used.
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*
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* \return
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* A ralloced string representing the prototype of the function.
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*/
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char *
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prototype_string(const glsl_type *return_type, const char *name,
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exec_list *parameters)
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{
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char *str = NULL;
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if (return_type != NULL)
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str = ralloc_asprintf(NULL, "%s ", return_type->name);
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ralloc_asprintf_append(&str, "%s(", name);
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const char *comma = "";
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foreach_in_list(const ir_variable, param, parameters) {
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ralloc_asprintf_append(&str, "%s%s", comma, param->type->name);
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comma = ", ";
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}
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ralloc_strcat(&str, ")");
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return str;
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}
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static glsl_precision precision_for_call (const ir_function_signature* sig, glsl_precision max_prec, glsl_precision first_prec)
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{
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if (sig->precision != glsl_precision_undefined)
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return sig->precision;
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// if return type is boolean, treat as lowp
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if (sig->return_type->base_type == GLSL_TYPE_BOOL)
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return glsl_precision_low;
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// if it's a built-in texture function, precision comes from sampler (1st param) precision
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if (sig->is_builtin())
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{
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if (strncmp (sig->function_name(), "texture", 7) == 0)
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return first_prec;
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if (strncmp (sig->function_name(), "shadow", 6) == 0)
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return first_prec;
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}
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// other built-in: max precision of parameters
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if (sig->is_builtin())
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return max_prec;
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// otherwise: undefined
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return glsl_precision_undefined;
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}
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static glsl_precision precision_for_call (const ir_function_signature* sig, exec_list *actual_parameters)
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{
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glsl_precision prec_params_max = glsl_precision_undefined;
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glsl_precision prec_params_first = glsl_precision_undefined;
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int params_counter = 0;
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foreach_two_lists(formal_node, &sig->parameters,
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actual_node, actual_parameters) {
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ir_rvalue *actual = (ir_rvalue *) actual_node;
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ir_variable *formal = (ir_variable *) formal_node;
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assert(actual != NULL);
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assert(formal != NULL);
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glsl_precision param_prec = (glsl_precision)formal->data.precision;
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if (param_prec == glsl_precision_undefined)
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param_prec = actual->get_precision();
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prec_params_max = higher_precision (prec_params_max, param_prec);
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if (params_counter == 0)
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prec_params_first = param_prec;
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++params_counter;
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}
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return precision_for_call (sig, prec_params_max, prec_params_first);
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}
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static bool
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verify_image_parameter(YYLTYPE *loc, _mesa_glsl_parse_state *state,
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const ir_variable *formal, const ir_variable *actual)
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{
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/**
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* From the ARB_shader_image_load_store specification:
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*
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* "The values of image variables qualified with coherent,
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* volatile, restrict, readonly, or writeonly may not be passed
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* to functions whose formal parameters lack such
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* qualifiers. [...] It is legal to have additional qualifiers
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* on a formal parameter, but not to have fewer."
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*/
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if (actual->data.image_coherent && !formal->data.image_coherent) {
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_mesa_glsl_error(loc, state,
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"function call parameter `%s' drops "
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"`coherent' qualifier", formal->name);
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return false;
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}
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if (actual->data.image_volatile && !formal->data.image_volatile) {
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_mesa_glsl_error(loc, state,
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"function call parameter `%s' drops "
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"`volatile' qualifier", formal->name);
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return false;
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}
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if (actual->data.image_restrict && !formal->data.image_restrict) {
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_mesa_glsl_error(loc, state,
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"function call parameter `%s' drops "
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"`restrict' qualifier", formal->name);
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return false;
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}
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if (actual->data.image_read_only && !formal->data.image_read_only) {
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_mesa_glsl_error(loc, state,
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"function call parameter `%s' drops "
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"`readonly' qualifier", formal->name);
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return false;
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}
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if (actual->data.image_write_only && !formal->data.image_write_only) {
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_mesa_glsl_error(loc, state,
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"function call parameter `%s' drops "
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"`writeonly' qualifier", formal->name);
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return false;
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}
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return true;
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}
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/**
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* Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
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* that 'const_in' formal parameters (an extension in our IR) correspond to
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* ir_constant actual parameters.
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*/
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static bool
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verify_parameter_modes(_mesa_glsl_parse_state *state,
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ir_function_signature *sig,
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exec_list &actual_ir_parameters,
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exec_list &actual_ast_parameters)
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{
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exec_node *actual_ir_node = actual_ir_parameters.head;
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exec_node *actual_ast_node = actual_ast_parameters.head;
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foreach_in_list(const ir_variable, formal, &sig->parameters) {
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/* The lists must be the same length. */
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assert(!actual_ir_node->is_tail_sentinel());
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assert(!actual_ast_node->is_tail_sentinel());
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const ir_rvalue *const actual = (ir_rvalue *) actual_ir_node;
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const ast_expression *const actual_ast =
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exec_node_data(ast_expression, actual_ast_node, link);
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/* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
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* FIXME: 0:0(0).
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*/
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YYLTYPE loc = actual_ast->get_location();
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/* Verify that 'const_in' parameters are ir_constants. */
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if (formal->data.mode == ir_var_const_in &&
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actual->ir_type != ir_type_constant) {
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_mesa_glsl_error(&loc, state,
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"parameter `in %s' must be a constant expression",
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formal->name);
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return false;
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}
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/* Verify that shader_in parameters are shader inputs */
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if (formal->data.must_be_shader_input) {
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ir_variable *var = actual->variable_referenced();
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if (var && var->data.mode != ir_var_shader_in) {
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_mesa_glsl_error(&loc, state,
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"parameter `%s` must be a shader input",
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formal->name);
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return false;
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}
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if (actual->ir_type == ir_type_swizzle) {
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_mesa_glsl_error(&loc, state,
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"parameter `%s` must not be swizzled",
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formal->name);
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return false;
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}
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}
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/* Verify that 'out' and 'inout' actual parameters are lvalues. */
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if (formal->data.mode == ir_var_function_out
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|| formal->data.mode == ir_var_function_inout) {
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const char *mode = NULL;
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switch (formal->data.mode) {
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case ir_var_function_out: mode = "out"; break;
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case ir_var_function_inout: mode = "inout"; break;
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default: assert(false); break;
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}
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/* This AST-based check catches errors like f(i++). The IR-based
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* is_lvalue() is insufficient because the actual parameter at the
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* IR-level is just a temporary value, which is an l-value.
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*/
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if (actual_ast->non_lvalue_description != NULL) {
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_mesa_glsl_error(&loc, state,
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"function parameter '%s %s' references a %s",
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mode, formal->name,
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actual_ast->non_lvalue_description);
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return false;
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}
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ir_variable *var = actual->variable_referenced();
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if (var)
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var->data.assigned = true;
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if (var && var->data.read_only) {
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_mesa_glsl_error(&loc, state,
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"function parameter '%s %s' references the "
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"read-only variable '%s'",
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mode, formal->name,
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actual->variable_referenced()->name);
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return false;
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} else if (!actual->is_lvalue()) {
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/* Even though ir_binop_vector_extract is not an l-value, let it
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* slop through. generate_call will handle it correctly.
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*/
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ir_expression *const expr = ((ir_rvalue *) actual)->as_expression();
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if (expr == NULL
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|| expr->operation != ir_binop_vector_extract
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|| !expr->operands[0]->is_lvalue()) {
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_mesa_glsl_error(&loc, state,
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"function parameter '%s %s' is not an lvalue",
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mode, formal->name);
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return false;
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}
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}
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}
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if (formal->type->is_image() &&
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actual->variable_referenced()) {
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if (!verify_image_parameter(&loc, state, formal,
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actual->variable_referenced()))
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return false;
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}
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actual_ir_node = actual_ir_node->next;
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actual_ast_node = actual_ast_node->next;
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}
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return true;
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}
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static void
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fix_parameter(void *mem_ctx, ir_rvalue *actual, const glsl_type *formal_type,
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exec_list *before_instructions, exec_list *after_instructions,
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bool parameter_is_inout, glsl_precision prec)
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{
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ir_expression *const expr = actual->as_expression();
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/* If the types match exactly and the parameter is not a vector-extract,
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* nothing needs to be done to fix the parameter.
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*/
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if (formal_type == actual->type
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&& (expr == NULL || expr->operation != ir_binop_vector_extract))
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return;
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/* To convert an out parameter, we need to create a temporary variable to
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* hold the value before conversion, and then perform the conversion after
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* the function call returns.
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*
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* This has the effect of transforming code like this:
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*
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* void f(out int x);
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* float value;
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* f(value);
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*
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* Into IR that's equivalent to this:
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*
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* void f(out int x);
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* float value;
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* int out_parameter_conversion;
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* f(out_parameter_conversion);
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* value = float(out_parameter_conversion);
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*
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* If the parameter is an ir_expression of ir_binop_vector_extract,
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* additional conversion is needed in the post-call re-write.
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*/
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ir_variable *tmp =
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new(mem_ctx) ir_variable(formal_type, "inout_tmp", ir_var_temporary, prec);
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before_instructions->push_tail(tmp);
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/* If the parameter is an inout parameter, copy the value of the actual
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* parameter to the new temporary. Note that no type conversion is allowed
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* here because inout parameters must match types exactly.
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*/
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if (parameter_is_inout) {
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/* Inout parameters should never require conversion, since that would
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* require an implicit conversion to exist both to and from the formal
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* parameter type, and there are no bidirectional implicit conversions.
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*/
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assert (actual->type == formal_type);
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ir_dereference_variable *const deref_tmp_1 =
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new(mem_ctx) ir_dereference_variable(tmp);
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ir_assignment *const assignment =
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new(mem_ctx) ir_assignment(deref_tmp_1, actual);
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before_instructions->push_tail(assignment);
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}
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/* Replace the parameter in the call with a dereference of the new
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* temporary.
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*/
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ir_dereference_variable *const deref_tmp_2 =
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new(mem_ctx) ir_dereference_variable(tmp);
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actual->replace_with(deref_tmp_2);
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|
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/* Copy the temporary variable to the actual parameter with optional
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* type conversion applied.
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*/
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ir_rvalue *rhs = new(mem_ctx) ir_dereference_variable(tmp);
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if (actual->type != formal_type)
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rhs = convert_component(rhs, actual->type);
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ir_rvalue *lhs = actual;
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if (expr != NULL && expr->operation == ir_binop_vector_extract) {
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rhs = new(mem_ctx) ir_expression(ir_triop_vector_insert,
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expr->operands[0]->type,
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expr->operands[0]->clone(mem_ctx, NULL),
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rhs,
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expr->operands[1]->clone(mem_ctx, NULL));
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lhs = expr->operands[0]->clone(mem_ctx, NULL);
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}
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ir_assignment *const assignment_2 = new(mem_ctx) ir_assignment(lhs, rhs);
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after_instructions->push_tail(assignment_2);
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}
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/**
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* Generate a function call.
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*
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* For non-void functions, this returns a dereference of the temporary variable
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* which stores the return value for the call. For void functions, this returns
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* NULL.
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*/
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static ir_rvalue *
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generate_call(exec_list *instructions, ir_function_signature *sig,
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exec_list *actual_parameters,
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struct _mesa_glsl_parse_state *state)
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{
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void *ctx = state;
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exec_list post_call_conversions;
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|
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/* Perform implicit conversion of arguments. For out parameters, we need
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* to place them in a temporary variable and do the conversion after the
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* call takes place. Since we haven't emitted the call yet, we'll place
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* the post-call conversions in a temporary exec_list, and emit them later.
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*/
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foreach_two_lists(formal_node, &sig->parameters,
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actual_node, actual_parameters) {
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ir_rvalue *actual = (ir_rvalue *) actual_node;
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ir_variable *formal = (ir_variable *) formal_node;
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if (formal->type->is_numeric() || formal->type->is_boolean()) {
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switch (formal->data.mode) {
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case ir_var_const_in:
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case ir_var_function_in: {
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ir_rvalue *converted
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= convert_component(actual, formal->type);
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actual->replace_with(converted);
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break;
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}
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case ir_var_function_out:
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case ir_var_function_inout:
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fix_parameter(ctx, actual, formal->type,
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instructions, &post_call_conversions,
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formal->data.mode == ir_var_function_inout,
|
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precision_for_call(sig,actual_parameters));
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break;
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default:
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assert (!"Illegal formal parameter mode");
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break;
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}
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}
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}
|
|
|
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/* If the function call is a constant expression, don't generate any
|
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* instructions; just generate an ir_constant.
|
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*
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* Function calls were first allowed to be constant expressions in GLSL
|
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* 1.20 and GLSL ES 3.00.
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*/
|
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if (state->is_version(120, 300)) {
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ir_constant *value = sig->constant_expression_value(actual_parameters, NULL);
|
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if (value != NULL) {
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return value;
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}
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}
|
|
|
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ir_dereference_variable *deref = NULL;
|
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if (!sig->return_type->is_void()) {
|
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/* Create a new temporary to hold the return value. */
|
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char *const name = ir_variable::temporaries_allocate_names
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? ralloc_asprintf(ctx, "%s_retval", sig->function_name())
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: NULL;
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ir_variable *var;
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var = new(ctx) ir_variable(sig->return_type, name, ir_var_temporary, precision_for_call(sig,actual_parameters));
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instructions->push_tail(var);
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ralloc_free(name);
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deref = new(ctx) ir_dereference_variable(var);
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}
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ir_call *call = new(ctx) ir_call(sig, deref, actual_parameters);
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instructions->push_tail(call);
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|
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/* Also emit any necessary out-parameter conversions. */
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|
instructions->append_list(&post_call_conversions);
|
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|
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return deref ? deref->clone(ctx, NULL) : NULL;
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}
|
|
|
|
/**
|
|
* Given a function name and parameter list, find the matching signature.
|
|
*/
|
|
static ir_function_signature *
|
|
match_function_by_name(const char *name,
|
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exec_list *actual_parameters,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
ir_function *f = state->symbols->get_function(name);
|
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ir_function_signature *local_sig = NULL;
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ir_function_signature *sig = NULL;
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|
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/* Is the function hidden by a record type constructor? */
|
|
if (state->symbols->get_type(name))
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goto done; /* no match */
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|
|
|
/* Is the function hidden by a variable (impossible in 1.10)? */
|
|
if (!state->symbols->separate_function_namespace
|
|
&& state->symbols->get_variable(name))
|
|
goto done; /* no match */
|
|
|
|
if (f != NULL) {
|
|
/* In desktop GL, the presence of a user-defined signature hides any
|
|
* built-in signatures, so we must ignore them. In contrast, in ES2
|
|
* user-defined signatures add new overloads, so we must consider them.
|
|
*/
|
|
bool allow_builtins = state->es_shader || !f->has_user_signature();
|
|
|
|
/* Look for a match in the local shader. If exact, we're done. */
|
|
bool is_exact = false;
|
|
sig = local_sig = f->matching_signature(state, actual_parameters,
|
|
allow_builtins, &is_exact);
|
|
if (is_exact)
|
|
goto done;
|
|
|
|
if (!allow_builtins)
|
|
goto done;
|
|
}
|
|
|
|
/* Local shader has no exact candidates; check the built-ins. */
|
|
_mesa_glsl_initialize_builtin_functions();
|
|
sig = _mesa_glsl_find_builtin_function(state, name, actual_parameters);
|
|
|
|
done:
|
|
if (sig != NULL) {
|
|
/* If the match is from a linked built-in shader, import the prototype. */
|
|
if (sig != local_sig) {
|
|
if (f == NULL) {
|
|
f = new(ctx) ir_function(name);
|
|
state->symbols->add_global_function(f);
|
|
emit_function(state, f);
|
|
}
|
|
f->add_signature(sig->clone_prototype(f, NULL));
|
|
}
|
|
}
|
|
return sig;
|
|
}
|
|
|
|
static void
|
|
print_function_prototypes(_mesa_glsl_parse_state *state, YYLTYPE *loc,
|
|
ir_function *f)
|
|
{
|
|
if (f == NULL)
|
|
return;
|
|
|
|
foreach_in_list(ir_function_signature, sig, &f->signatures) {
|
|
if (sig->is_builtin() && !sig->is_builtin_available(state))
|
|
continue;
|
|
|
|
char *str = prototype_string(sig->return_type, f->name, &sig->parameters);
|
|
_mesa_glsl_error(loc, state, " %s", str);
|
|
ralloc_free(str);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Raise a "no matching function" error, listing all possible overloads the
|
|
* compiler considered so developers can figure out what went wrong.
|
|
*/
|
|
static void
|
|
no_matching_function_error(const char *name,
|
|
YYLTYPE *loc,
|
|
exec_list *actual_parameters,
|
|
_mesa_glsl_parse_state *state)
|
|
{
|
|
gl_shader *sh = _mesa_glsl_get_builtin_function_shader();
|
|
|
|
if (state->symbols->get_function(name) == NULL
|
|
&& (!state->uses_builtin_functions
|
|
|| sh->symbols->get_function(name) == NULL)) {
|
|
_mesa_glsl_error(loc, state, "no function with name '%s'", name);
|
|
} else {
|
|
char *str = prototype_string(NULL, name, actual_parameters);
|
|
_mesa_glsl_error(loc, state,
|
|
"no matching function for call to `%s'; candidates are:",
|
|
str);
|
|
ralloc_free(str);
|
|
|
|
print_function_prototypes(state, loc, state->symbols->get_function(name));
|
|
|
|
if (state->uses_builtin_functions) {
|
|
print_function_prototypes(state, loc, sh->symbols->get_function(name));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Perform automatic type conversion of constructor parameters
|
|
*
|
|
* This implements the rules in the "Conversion and Scalar Constructors"
|
|
* section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
|
|
*/
|
|
static ir_rvalue *
|
|
convert_component(ir_rvalue *src, const glsl_type *desired_type)
|
|
{
|
|
void *ctx = ralloc_parent(src);
|
|
const unsigned a = desired_type->base_type;
|
|
const unsigned b = src->type->base_type;
|
|
ir_expression *result = NULL;
|
|
|
|
if (src->type->is_error())
|
|
return src;
|
|
|
|
assert(a <= GLSL_TYPE_BOOL);
|
|
assert(b <= GLSL_TYPE_BOOL);
|
|
|
|
if (a == b)
|
|
return src;
|
|
|
|
switch (a) {
|
|
case GLSL_TYPE_UINT:
|
|
switch (b) {
|
|
case GLSL_TYPE_INT:
|
|
result = new(ctx) ir_expression(ir_unop_i2u, src);
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
result = new(ctx) ir_expression(ir_unop_f2u, src);
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
result = new(ctx) ir_expression(ir_unop_i2u,
|
|
new(ctx) ir_expression(ir_unop_b2i, src));
|
|
break;
|
|
}
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
switch (b) {
|
|
case GLSL_TYPE_UINT:
|
|
result = new(ctx) ir_expression(ir_unop_u2i, src);
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
result = new(ctx) ir_expression(ir_unop_f2i, src);
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
result = new(ctx) ir_expression(ir_unop_b2i, src);
|
|
break;
|
|
}
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
switch (b) {
|
|
case GLSL_TYPE_UINT:
|
|
result = new(ctx) ir_expression(ir_unop_u2f, desired_type, src, NULL);
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
result = new(ctx) ir_expression(ir_unop_i2f, desired_type, src, NULL);
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
result = new(ctx) ir_expression(ir_unop_b2f, desired_type, src, NULL);
|
|
break;
|
|
}
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
switch (b) {
|
|
case GLSL_TYPE_UINT:
|
|
result = new(ctx) ir_expression(ir_unop_i2b,
|
|
new(ctx) ir_expression(ir_unop_u2i, src));
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
result = new(ctx) ir_expression(ir_unop_i2b, desired_type, src, NULL);
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
result = new(ctx) ir_expression(ir_unop_f2b, desired_type, src, NULL);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
assert(result != NULL);
|
|
assert(result->type == desired_type);
|
|
|
|
/* Try constant folding; it may fold in the conversion we just added. */
|
|
ir_constant *const constant = result->constant_expression_value();
|
|
return (constant != NULL) ? (ir_rvalue *) constant : (ir_rvalue *) result;
|
|
}
|
|
|
|
/**
|
|
* Dereference a specific component from a scalar, vector, or matrix
|
|
*/
|
|
static ir_rvalue *
|
|
dereference_component(ir_rvalue *src, unsigned component)
|
|
{
|
|
void *ctx = ralloc_parent(src);
|
|
assert(component < src->type->components());
|
|
|
|
/* If the source is a constant, just create a new constant instead of a
|
|
* dereference of the existing constant.
|
|
*/
|
|
ir_constant *constant = src->as_constant();
|
|
if (constant)
|
|
return new(ctx) ir_constant(constant, component);
|
|
|
|
if (src->type->is_scalar()) {
|
|
return src;
|
|
} else if (src->type->is_vector()) {
|
|
return new(ctx) ir_swizzle(src, component, 0, 0, 0, 1);
|
|
} else {
|
|
assert(src->type->is_matrix());
|
|
|
|
/* Dereference a row of the matrix, then call this function again to get
|
|
* a specific element from that row.
|
|
*/
|
|
const int c = component / src->type->column_type()->vector_elements;
|
|
const int r = component % src->type->column_type()->vector_elements;
|
|
ir_constant *const col_index = new(ctx) ir_constant(c);
|
|
ir_dereference *const col = new(ctx) ir_dereference_array(src, col_index);
|
|
|
|
col->type = src->type->column_type();
|
|
|
|
return dereference_component(col, r);
|
|
}
|
|
|
|
assert(!"Should not get here.");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static ir_rvalue *
|
|
process_vec_mat_constructor(exec_list *instructions,
|
|
const glsl_type *constructor_type,
|
|
YYLTYPE *loc, exec_list *parameters,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
|
|
/* The ARB_shading_language_420pack spec says:
|
|
*
|
|
* "If an initializer is a list of initializers enclosed in curly braces,
|
|
* the variable being declared must be a vector, a matrix, an array, or a
|
|
* structure.
|
|
*
|
|
* int i = { 1 }; // illegal, i is not an aggregate"
|
|
*/
|
|
if (constructor_type->vector_elements <= 1) {
|
|
_mesa_glsl_error(loc, state, "aggregates can only initialize vectors, "
|
|
"matrices, arrays, and structs");
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
exec_list actual_parameters;
|
|
const unsigned parameter_count =
|
|
process_parameters(instructions, &actual_parameters, parameters, state);
|
|
|
|
if (parameter_count == 0
|
|
|| (constructor_type->is_vector() &&
|
|
constructor_type->vector_elements != parameter_count)
|
|
|| (constructor_type->is_matrix() &&
|
|
constructor_type->matrix_columns != parameter_count)) {
|
|
_mesa_glsl_error(loc, state, "%s constructor must have %u parameters",
|
|
constructor_type->is_vector() ? "vector" : "matrix",
|
|
constructor_type->vector_elements);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
bool all_parameters_are_constant = true;
|
|
|
|
/* Type cast each parameter and, if possible, fold constants. */
|
|
foreach_in_list_safe(ir_rvalue, ir, &actual_parameters) {
|
|
ir_rvalue *result = ir;
|
|
|
|
/* Apply implicit conversions (not the scalar constructor rules!). See
|
|
* the spec quote above. */
|
|
if (constructor_type->is_float()) {
|
|
const glsl_type *desired_type =
|
|
glsl_type::get_instance(GLSL_TYPE_FLOAT,
|
|
ir->type->vector_elements,
|
|
ir->type->matrix_columns);
|
|
if (result->type->can_implicitly_convert_to(desired_type, state)) {
|
|
/* Even though convert_component() implements the constructor
|
|
* conversion rules (not the implicit conversion rules), its safe
|
|
* to use it here because we already checked that the implicit
|
|
* conversion is legal.
|
|
*/
|
|
result = convert_component(ir, desired_type);
|
|
}
|
|
}
|
|
|
|
if (constructor_type->is_matrix()) {
|
|
if (result->type != constructor_type->column_type()) {
|
|
_mesa_glsl_error(loc, state, "type error in matrix constructor: "
|
|
"expected: %s, found %s",
|
|
constructor_type->column_type()->name,
|
|
result->type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
} else if (result->type != constructor_type->get_scalar_type()) {
|
|
_mesa_glsl_error(loc, state, "type error in vector constructor: "
|
|
"expected: %s, found %s",
|
|
constructor_type->get_scalar_type()->name,
|
|
result->type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* Attempt to convert the parameter to a constant valued expression.
|
|
* After doing so, track whether or not all the parameters to the
|
|
* constructor are trivially constant valued expressions.
|
|
*/
|
|
ir_rvalue *const constant = result->constant_expression_value();
|
|
|
|
if (constant != NULL)
|
|
result = constant;
|
|
else
|
|
all_parameters_are_constant = false;
|
|
|
|
ir->replace_with(result);
|
|
}
|
|
|
|
if (all_parameters_are_constant)
|
|
return new(ctx) ir_constant(constructor_type, &actual_parameters);
|
|
|
|
ir_variable *var = new(ctx) ir_variable(constructor_type, "vec_mat_ctor",
|
|
ir_var_temporary, glsl_precision_undefined);
|
|
instructions->push_tail(var);
|
|
|
|
int i = 0;
|
|
|
|
foreach_in_list(ir_rvalue, rhs, &actual_parameters) {
|
|
ir_instruction *assignment = NULL;
|
|
|
|
if (var->type->is_matrix()) {
|
|
ir_rvalue *lhs = new(ctx) ir_dereference_array(var,
|
|
new(ctx) ir_constant(i));
|
|
assignment = new(ctx) ir_assignment(lhs, rhs, NULL);
|
|
} else {
|
|
/* use writemask rather than index for vector */
|
|
assert(var->type->is_vector());
|
|
assert(i < 4);
|
|
ir_dereference *lhs = new(ctx) ir_dereference_variable(var);
|
|
assignment = new(ctx) ir_assignment(lhs, rhs, NULL, (unsigned)(1 << i));
|
|
}
|
|
|
|
instructions->push_tail(assignment);
|
|
|
|
i++;
|
|
}
|
|
|
|
return new(ctx) ir_dereference_variable(var);
|
|
}
|
|
|
|
|
|
static ir_rvalue *
|
|
process_array_constructor(exec_list *instructions,
|
|
const glsl_type *constructor_type,
|
|
YYLTYPE *loc, exec_list *parameters,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
/* Array constructors come in two forms: sized and unsized. Sized array
|
|
* constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
|
|
* variables. In this case the number of parameters must exactly match the
|
|
* specified size of the array.
|
|
*
|
|
* Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
|
|
* are vec4 variables. In this case the size of the array being constructed
|
|
* is determined by the number of parameters.
|
|
*
|
|
* From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
|
|
*
|
|
* "There must be exactly the same number of arguments as the size of
|
|
* the array being constructed. If no size is present in the
|
|
* constructor, then the array is explicitly sized to the number of
|
|
* arguments provided. The arguments are assigned in order, starting at
|
|
* element 0, to the elements of the constructed array. Each argument
|
|
* must be the same type as the element type of the array, or be a type
|
|
* that can be converted to the element type of the array according to
|
|
* Section 4.1.10 "Implicit Conversions.""
|
|
*/
|
|
exec_list actual_parameters;
|
|
const unsigned parameter_count =
|
|
process_parameters(instructions, &actual_parameters, parameters, state);
|
|
bool is_unsized_array = constructor_type->is_unsized_array();
|
|
|
|
if ((parameter_count == 0) ||
|
|
(!is_unsized_array && (constructor_type->length != parameter_count))) {
|
|
const unsigned min_param = is_unsized_array
|
|
? 1 : constructor_type->length;
|
|
|
|
_mesa_glsl_error(loc, state, "array constructor must have %s %u "
|
|
"parameter%s",
|
|
is_unsized_array ? "at least" : "exactly",
|
|
min_param, (min_param <= 1) ? "" : "s");
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
if (is_unsized_array) {
|
|
constructor_type =
|
|
glsl_type::get_array_instance(constructor_type->element_type(),
|
|
parameter_count);
|
|
assert(constructor_type != NULL);
|
|
assert(constructor_type->length == parameter_count);
|
|
}
|
|
|
|
bool all_parameters_are_constant = true;
|
|
|
|
/* Type cast each parameter and, if possible, fold constants. */
|
|
foreach_in_list_safe(ir_rvalue, ir, &actual_parameters) {
|
|
ir_rvalue *result = ir;
|
|
|
|
/* Apply implicit conversions (not the scalar constructor rules!). See
|
|
* the spec quote above. */
|
|
if (constructor_type->element_type()->is_float()) {
|
|
const glsl_type *desired_type =
|
|
glsl_type::get_instance(GLSL_TYPE_FLOAT,
|
|
ir->type->vector_elements,
|
|
ir->type->matrix_columns);
|
|
if (result->type->can_implicitly_convert_to(desired_type, state)) {
|
|
/* Even though convert_component() implements the constructor
|
|
* conversion rules (not the implicit conversion rules), its safe
|
|
* to use it here because we already checked that the implicit
|
|
* conversion is legal.
|
|
*/
|
|
result = convert_component(ir, desired_type);
|
|
}
|
|
}
|
|
|
|
if (result->type != constructor_type->element_type()) {
|
|
_mesa_glsl_error(loc, state, "type error in array constructor: "
|
|
"expected: %s, found %s",
|
|
constructor_type->element_type()->name,
|
|
result->type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* Attempt to convert the parameter to a constant valued expression.
|
|
* After doing so, track whether or not all the parameters to the
|
|
* constructor are trivially constant valued expressions.
|
|
*/
|
|
ir_rvalue *const constant = result->constant_expression_value();
|
|
|
|
if (constant != NULL)
|
|
result = constant;
|
|
else
|
|
all_parameters_are_constant = false;
|
|
|
|
ir->replace_with(result);
|
|
}
|
|
|
|
if (all_parameters_are_constant)
|
|
return new(ctx) ir_constant(constructor_type, &actual_parameters);
|
|
|
|
ir_variable *var = new(ctx) ir_variable(constructor_type, "array_ctor",
|
|
ir_var_temporary, glsl_precision_undefined);
|
|
instructions->push_tail(var);
|
|
|
|
int i = 0;
|
|
foreach_in_list(ir_rvalue, rhs, &actual_parameters) {
|
|
ir_rvalue *lhs = new(ctx) ir_dereference_array(var,
|
|
new(ctx) ir_constant(i));
|
|
|
|
ir_instruction *assignment = new(ctx) ir_assignment(lhs, rhs, NULL);
|
|
instructions->push_tail(assignment);
|
|
|
|
i++;
|
|
}
|
|
|
|
return new(ctx) ir_dereference_variable(var);
|
|
}
|
|
|
|
|
|
/**
|
|
* Try to convert a record constructor to a constant expression
|
|
*/
|
|
static ir_constant *
|
|
constant_record_constructor(const glsl_type *constructor_type,
|
|
exec_list *parameters, void *mem_ctx)
|
|
{
|
|
foreach_in_list(ir_instruction, node, parameters) {
|
|
ir_constant *constant = node->as_constant();
|
|
if (constant == NULL)
|
|
return NULL;
|
|
node->replace_with(constant);
|
|
}
|
|
|
|
return new(mem_ctx) ir_constant(constructor_type, parameters);
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if a list consists of a single scalar r-value
|
|
*/
|
|
bool
|
|
single_scalar_parameter(exec_list *parameters)
|
|
{
|
|
const ir_rvalue *const p = (ir_rvalue *) parameters->head;
|
|
assert(((ir_rvalue *)p)->as_rvalue() != NULL);
|
|
|
|
return (p->type->is_scalar() && p->next->is_tail_sentinel());
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate inline code for a vector constructor
|
|
*
|
|
* The generated constructor code will consist of a temporary variable
|
|
* declaration of the same type as the constructor. A sequence of assignments
|
|
* from constructor parameters to the temporary will follow.
|
|
*
|
|
* \return
|
|
* An \c ir_dereference_variable of the temprorary generated in the constructor
|
|
* body.
|
|
*/
|
|
ir_rvalue *
|
|
emit_inline_vector_constructor(const glsl_type *type, unsigned ast_precision,
|
|
exec_list *instructions,
|
|
exec_list *parameters,
|
|
void *ctx)
|
|
{
|
|
assert(!parameters->is_empty());
|
|
|
|
ir_variable *var = new(ctx) ir_variable(type, "vec_ctor", ir_var_temporary, (glsl_precision)ast_precision);
|
|
instructions->push_tail(var);
|
|
|
|
/* There are two kinds of vector constructors.
|
|
*
|
|
* - Construct a vector from a single scalar by replicating that scalar to
|
|
* all components of the vector.
|
|
*
|
|
* - Construct a vector from an arbirary combination of vectors and
|
|
* scalars. The components of the constructor parameters are assigned
|
|
* to the vector in order until the vector is full.
|
|
*/
|
|
const unsigned lhs_components = type->components();
|
|
if (single_scalar_parameter(parameters)) {
|
|
ir_rvalue *first_param = (ir_rvalue *)parameters->head;
|
|
ir_rvalue *rhs = new(ctx) ir_swizzle(first_param, 0, 0, 0, 0,
|
|
lhs_components);
|
|
var->data.precision = higher_precision ((glsl_precision)var->data.precision, rhs->get_precision());
|
|
ir_dereference_variable *lhs = new(ctx) ir_dereference_variable(var);
|
|
const unsigned mask = (1U << lhs_components) - 1;
|
|
|
|
assert(rhs->type == lhs->type);
|
|
|
|
ir_instruction *inst = new(ctx) ir_assignment(lhs, rhs, NULL, mask);
|
|
instructions->push_tail(inst);
|
|
} else {
|
|
unsigned base_component = 0;
|
|
unsigned base_lhs_component = 0;
|
|
ir_constant_data data;
|
|
unsigned constant_mask = 0, constant_components = 0;
|
|
|
|
memset(&data, 0, sizeof(data));
|
|
|
|
foreach_in_list(ir_rvalue, param, parameters) {
|
|
var->data.precision = higher_precision ((glsl_precision)var->data.precision, param->get_precision());
|
|
unsigned rhs_components = param->type->components();
|
|
|
|
/* Do not try to assign more components to the vector than it has!
|
|
*/
|
|
if ((rhs_components + base_lhs_component) > lhs_components) {
|
|
rhs_components = lhs_components - base_lhs_component;
|
|
}
|
|
|
|
const ir_constant *const c = param->as_constant();
|
|
if (c != NULL) {
|
|
for (unsigned i = 0; i < rhs_components; i++) {
|
|
switch (c->type->base_type) {
|
|
case GLSL_TYPE_UINT:
|
|
data.u[i + base_component] = c->get_uint_component(i);
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
data.i[i + base_component] = c->get_int_component(i);
|
|
break;
|
|
case GLSL_TYPE_FLOAT:
|
|
data.f[i + base_component] = c->get_float_component(i);
|
|
break;
|
|
case GLSL_TYPE_BOOL:
|
|
data.b[i + base_component] = c->get_bool_component(i);
|
|
break;
|
|
default:
|
|
assert(!"Should not get here.");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Mask of fields to be written in the assignment.
|
|
*/
|
|
constant_mask |= ((1U << rhs_components) - 1) << base_lhs_component;
|
|
constant_components += rhs_components;
|
|
|
|
base_component += rhs_components;
|
|
}
|
|
/* Advance the component index by the number of components
|
|
* that were just assigned.
|
|
*/
|
|
base_lhs_component += rhs_components;
|
|
}
|
|
|
|
if (constant_mask != 0) {
|
|
ir_dereference *lhs = new(ctx) ir_dereference_variable(var);
|
|
const glsl_type *rhs_type = glsl_type::get_instance(var->type->base_type,
|
|
constant_components,
|
|
1);
|
|
ir_rvalue *rhs = new(ctx) ir_constant(rhs_type, &data);
|
|
|
|
ir_instruction *inst =
|
|
new(ctx) ir_assignment(lhs, rhs, NULL, constant_mask);
|
|
instructions->push_tail(inst);
|
|
}
|
|
|
|
base_component = 0;
|
|
foreach_in_list(ir_rvalue, param, parameters) {
|
|
unsigned rhs_components = param->type->components();
|
|
|
|
/* Do not try to assign more components to the vector than it has!
|
|
*/
|
|
if ((rhs_components + base_component) > lhs_components) {
|
|
rhs_components = lhs_components - base_component;
|
|
}
|
|
|
|
const ir_constant *const c = param->as_constant();
|
|
if (c == NULL) {
|
|
/* Mask of fields to be written in the assignment.
|
|
*/
|
|
const unsigned write_mask = ((1U << rhs_components) - 1)
|
|
<< base_component;
|
|
|
|
ir_dereference *lhs = new(ctx) ir_dereference_variable(var);
|
|
|
|
/* Generate a swizzle so that LHS and RHS sizes match.
|
|
*/
|
|
ir_rvalue *rhs =
|
|
new(ctx) ir_swizzle(param, 0, 1, 2, 3, rhs_components);
|
|
|
|
ir_instruction *inst =
|
|
new(ctx) ir_assignment(lhs, rhs, NULL, write_mask);
|
|
instructions->push_tail(inst);
|
|
}
|
|
|
|
/* Advance the component index by the number of components that were
|
|
* just assigned.
|
|
*/
|
|
base_component += rhs_components;
|
|
}
|
|
}
|
|
return new(ctx) ir_dereference_variable(var);
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate assignment of a portion of a vector to a portion of a matrix column
|
|
*
|
|
* \param src_base First component of the source to be used in assignment
|
|
* \param column Column of destination to be assiged
|
|
* \param row_base First component of the destination column to be assigned
|
|
* \param count Number of components to be assigned
|
|
*
|
|
* \note
|
|
* \c src_base + \c count must be less than or equal to the number of components
|
|
* in the source vector.
|
|
*/
|
|
ir_instruction *
|
|
assign_to_matrix_column(ir_variable *var, unsigned column, unsigned row_base,
|
|
ir_rvalue *src, unsigned src_base, unsigned count,
|
|
void *mem_ctx)
|
|
{
|
|
ir_constant *col_idx = new(mem_ctx) ir_constant(column);
|
|
ir_dereference *column_ref = new(mem_ctx) ir_dereference_array(var, col_idx);
|
|
|
|
assert(column_ref->type->components() >= (row_base + count));
|
|
assert(src->type->components() >= (src_base + count));
|
|
|
|
/* Generate a swizzle that extracts the number of components from the source
|
|
* that are to be assigned to the column of the matrix.
|
|
*/
|
|
if (count < src->type->vector_elements) {
|
|
src = new(mem_ctx) ir_swizzle(src,
|
|
src_base + 0, src_base + 1,
|
|
src_base + 2, src_base + 3,
|
|
count);
|
|
}
|
|
|
|
/* Mask of fields to be written in the assignment.
|
|
*/
|
|
const unsigned write_mask = ((1U << count) - 1) << row_base;
|
|
|
|
return new(mem_ctx) ir_assignment(column_ref, src, NULL, write_mask);
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate inline code for a matrix constructor
|
|
*
|
|
* The generated constructor code will consist of a temporary variable
|
|
* declaration of the same type as the constructor. A sequence of assignments
|
|
* from constructor parameters to the temporary will follow.
|
|
*
|
|
* \return
|
|
* An \c ir_dereference_variable of the temprorary generated in the constructor
|
|
* body.
|
|
*/
|
|
ir_rvalue *
|
|
emit_inline_matrix_constructor(const glsl_type *type, int ast_precision,
|
|
exec_list *instructions,
|
|
exec_list *parameters,
|
|
void *ctx)
|
|
{
|
|
assert(!parameters->is_empty());
|
|
|
|
ir_variable *var = new(ctx) ir_variable(type, "mat_ctor", ir_var_temporary, (glsl_precision)ast_precision);
|
|
instructions->push_tail(var);
|
|
|
|
/* There are three kinds of matrix constructors.
|
|
*
|
|
* - Construct a matrix from a single scalar by replicating that scalar to
|
|
* along the diagonal of the matrix and setting all other components to
|
|
* zero.
|
|
*
|
|
* - Construct a matrix from an arbirary combination of vectors and
|
|
* scalars. The components of the constructor parameters are assigned
|
|
* to the matrix in column-major order until the matrix is full.
|
|
*
|
|
* - Construct a matrix from a single matrix. The source matrix is copied
|
|
* to the upper left portion of the constructed matrix, and the remaining
|
|
* elements take values from the identity matrix.
|
|
*/
|
|
ir_rvalue *const first_param = (ir_rvalue *) parameters->head;
|
|
if (single_scalar_parameter(parameters)) {
|
|
/* Assign the scalar to the X component of a vec4, and fill the remaining
|
|
* components with zero.
|
|
*/
|
|
ir_variable *rhs_var =
|
|
new(ctx) ir_variable(glsl_type::vec4_type, "mat_ctor_vec",
|
|
ir_var_temporary, (glsl_precision)ast_precision);
|
|
instructions->push_tail(rhs_var);
|
|
|
|
ir_constant_data zero;
|
|
zero.f[0] = 0.0;
|
|
zero.f[1] = 0.0;
|
|
zero.f[2] = 0.0;
|
|
zero.f[3] = 0.0;
|
|
|
|
ir_instruction *inst =
|
|
new(ctx) ir_assignment(new(ctx) ir_dereference_variable(rhs_var),
|
|
new(ctx) ir_constant(rhs_var->type, &zero),
|
|
NULL);
|
|
instructions->push_tail(inst);
|
|
|
|
ir_dereference *const rhs_ref = new(ctx) ir_dereference_variable(rhs_var);
|
|
|
|
inst = new(ctx) ir_assignment(rhs_ref, first_param, NULL, 0x01);
|
|
instructions->push_tail(inst);
|
|
|
|
/* Assign the temporary vector to each column of the destination matrix
|
|
* with a swizzle that puts the X component on the diagonal of the
|
|
* matrix. In some cases this may mean that the X component does not
|
|
* get assigned into the column at all (i.e., when the matrix has more
|
|
* columns than rows).
|
|
*/
|
|
static const unsigned rhs_swiz[4][4] = {
|
|
{ 0, 1, 1, 1 },
|
|
{ 1, 0, 1, 1 },
|
|
{ 1, 1, 0, 1 },
|
|
{ 1, 1, 1, 0 }
|
|
};
|
|
|
|
const unsigned cols_to_init = MIN2(type->matrix_columns,
|
|
type->vector_elements);
|
|
for (unsigned i = 0; i < cols_to_init; i++) {
|
|
ir_constant *const col_idx = new(ctx) ir_constant(i);
|
|
ir_rvalue *const col_ref = new(ctx) ir_dereference_array(var, col_idx);
|
|
|
|
ir_rvalue *const rhs_ref = new(ctx) ir_dereference_variable(rhs_var);
|
|
ir_rvalue *const rhs = new(ctx) ir_swizzle(rhs_ref, rhs_swiz[i],
|
|
type->vector_elements);
|
|
|
|
inst = new(ctx) ir_assignment(col_ref, rhs, NULL);
|
|
instructions->push_tail(inst);
|
|
}
|
|
|
|
for (unsigned i = cols_to_init; i < type->matrix_columns; i++) {
|
|
ir_constant *const col_idx = new(ctx) ir_constant(i);
|
|
ir_rvalue *const col_ref = new(ctx) ir_dereference_array(var, col_idx);
|
|
|
|
ir_rvalue *const rhs_ref = new(ctx) ir_dereference_variable(rhs_var);
|
|
ir_rvalue *const rhs = new(ctx) ir_swizzle(rhs_ref, 1, 1, 1, 1,
|
|
type->vector_elements);
|
|
|
|
inst = new(ctx) ir_assignment(col_ref, rhs, NULL);
|
|
instructions->push_tail(inst);
|
|
}
|
|
} else if (first_param->type->is_matrix()) {
|
|
/* From page 50 (56 of the PDF) of the GLSL 1.50 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. All other components will be initialized to the
|
|
* identity matrix. If a matrix argument is given to a matrix
|
|
* constructor, it is an error to have any other arguments."
|
|
*/
|
|
assert(first_param->next->is_tail_sentinel());
|
|
ir_rvalue *const src_matrix = first_param;
|
|
|
|
/* If the source matrix is smaller, pre-initialize the relavent parts of
|
|
* the destination matrix to the identity matrix.
|
|
*/
|
|
if ((src_matrix->type->matrix_columns < var->type->matrix_columns)
|
|
|| (src_matrix->type->vector_elements < var->type->vector_elements)) {
|
|
|
|
/* If the source matrix has fewer rows, every column of the destination
|
|
* must be initialized. Otherwise only the columns in the destination
|
|
* that do not exist in the source must be initialized.
|
|
*/
|
|
unsigned col =
|
|
(src_matrix->type->vector_elements < var->type->vector_elements)
|
|
? 0 : src_matrix->type->matrix_columns;
|
|
|
|
const glsl_type *const col_type = var->type->column_type();
|
|
for (/* empty */; col < var->type->matrix_columns; col++) {
|
|
ir_constant_data ident;
|
|
|
|
ident.f[0] = 0.0;
|
|
ident.f[1] = 0.0;
|
|
ident.f[2] = 0.0;
|
|
ident.f[3] = 0.0;
|
|
|
|
ident.f[col] = 1.0;
|
|
|
|
ir_rvalue *const rhs = new(ctx) ir_constant(col_type, &ident);
|
|
|
|
ir_rvalue *const lhs =
|
|
new(ctx) ir_dereference_array(var, new(ctx) ir_constant(col));
|
|
|
|
ir_instruction *inst = new(ctx) ir_assignment(lhs, rhs, NULL);
|
|
instructions->push_tail(inst);
|
|
}
|
|
}
|
|
|
|
/* Assign columns from the source matrix to the destination matrix.
|
|
*
|
|
* Since the parameter will be used in the RHS of multiple assignments,
|
|
* generate a temporary and copy the paramter there.
|
|
*/
|
|
ir_variable *const rhs_var =
|
|
new(ctx) ir_variable(first_param->type, "mat_ctor_mat",
|
|
ir_var_temporary, (glsl_precision)ast_precision);
|
|
instructions->push_tail(rhs_var);
|
|
|
|
ir_dereference *const rhs_var_ref =
|
|
new(ctx) ir_dereference_variable(rhs_var);
|
|
ir_instruction *const inst =
|
|
new(ctx) ir_assignment(rhs_var_ref, first_param, NULL);
|
|
instructions->push_tail(inst);
|
|
|
|
const unsigned last_row = MIN2(src_matrix->type->vector_elements,
|
|
var->type->vector_elements);
|
|
const unsigned last_col = MIN2(src_matrix->type->matrix_columns,
|
|
var->type->matrix_columns);
|
|
|
|
unsigned swiz[4] = { 0, 0, 0, 0 };
|
|
for (unsigned i = 1; i < last_row; i++)
|
|
swiz[i] = i;
|
|
|
|
const unsigned write_mask = (1U << last_row) - 1;
|
|
|
|
for (unsigned i = 0; i < last_col; i++) {
|
|
ir_dereference *const lhs =
|
|
new(ctx) ir_dereference_array(var, new(ctx) ir_constant(i));
|
|
ir_rvalue *const rhs_col =
|
|
new(ctx) ir_dereference_array(rhs_var, new(ctx) ir_constant(i));
|
|
|
|
/* If one matrix has columns that are smaller than the columns of the
|
|
* other matrix, wrap the column access of the larger with a swizzle
|
|
* so that the LHS and RHS of the assignment have the same size (and
|
|
* therefore have the same type).
|
|
*
|
|
* It would be perfectly valid to unconditionally generate the
|
|
* swizzles, this this will typically result in a more compact IR tree.
|
|
*/
|
|
ir_rvalue *rhs;
|
|
if (lhs->type->vector_elements != rhs_col->type->vector_elements) {
|
|
rhs = new(ctx) ir_swizzle(rhs_col, swiz, last_row);
|
|
} else {
|
|
rhs = rhs_col;
|
|
}
|
|
|
|
ir_instruction *inst =
|
|
new(ctx) ir_assignment(lhs, rhs, NULL, write_mask);
|
|
instructions->push_tail(inst);
|
|
}
|
|
} else {
|
|
const unsigned cols = type->matrix_columns;
|
|
const unsigned rows = type->vector_elements;
|
|
unsigned col_idx = 0;
|
|
unsigned row_idx = 0;
|
|
|
|
foreach_in_list(ir_rvalue, rhs, parameters) {
|
|
const unsigned components_remaining_this_column = rows - row_idx;
|
|
unsigned rhs_components = rhs->type->components();
|
|
unsigned rhs_base = 0;
|
|
|
|
/* Since the parameter might be used in the RHS of two assignments,
|
|
* generate a temporary and copy the paramter there.
|
|
*/
|
|
ir_variable *rhs_var =
|
|
new(ctx) ir_variable(rhs->type, "mat_ctor_vec", ir_var_temporary, (glsl_precision)ast_precision);
|
|
instructions->push_tail(rhs_var);
|
|
|
|
ir_dereference *rhs_var_ref =
|
|
new(ctx) ir_dereference_variable(rhs_var);
|
|
ir_instruction *inst = new(ctx) ir_assignment(rhs_var_ref, rhs, NULL);
|
|
instructions->push_tail(inst);
|
|
|
|
/* Assign the current parameter to as many components of the matrix
|
|
* as it will fill.
|
|
*
|
|
* NOTE: A single vector parameter can span two matrix columns. A
|
|
* single vec4, for example, can completely fill a mat2.
|
|
*/
|
|
if (rhs_components >= components_remaining_this_column) {
|
|
const unsigned count = MIN2(rhs_components,
|
|
components_remaining_this_column);
|
|
|
|
rhs_var_ref = new(ctx) ir_dereference_variable(rhs_var);
|
|
|
|
ir_instruction *inst = assign_to_matrix_column(var, col_idx,
|
|
row_idx,
|
|
rhs_var_ref, 0,
|
|
count, ctx);
|
|
instructions->push_tail(inst);
|
|
|
|
rhs_base = count;
|
|
|
|
col_idx++;
|
|
row_idx = 0;
|
|
}
|
|
|
|
/* If there is data left in the parameter and components left to be
|
|
* set in the destination, emit another assignment. It is possible
|
|
* that the assignment could be of a vec4 to the last element of the
|
|
* matrix. In this case col_idx==cols, but there is still data
|
|
* left in the source parameter. Obviously, don't emit an assignment
|
|
* to data outside the destination matrix.
|
|
*/
|
|
if ((col_idx < cols) && (rhs_base < rhs_components)) {
|
|
const unsigned count = rhs_components - rhs_base;
|
|
|
|
rhs_var_ref = new(ctx) ir_dereference_variable(rhs_var);
|
|
|
|
ir_instruction *inst = assign_to_matrix_column(var, col_idx,
|
|
row_idx,
|
|
rhs_var_ref,
|
|
rhs_base,
|
|
count, ctx);
|
|
instructions->push_tail(inst);
|
|
|
|
row_idx += count;
|
|
}
|
|
}
|
|
}
|
|
|
|
return new(ctx) ir_dereference_variable(var);
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
emit_inline_record_constructor(const glsl_type *type,
|
|
exec_list *instructions,
|
|
exec_list *parameters,
|
|
void *mem_ctx)
|
|
{
|
|
ir_variable *const var =
|
|
new(mem_ctx) ir_variable(type, "record_ctor", ir_var_temporary, glsl_precision_undefined);
|
|
ir_dereference_variable *const d = new(mem_ctx) ir_dereference_variable(var);
|
|
|
|
instructions->push_tail(var);
|
|
|
|
exec_node *node = parameters->head;
|
|
for (unsigned i = 0; i < type->length; i++) {
|
|
assert(!node->is_tail_sentinel());
|
|
|
|
ir_dereference *const lhs =
|
|
new(mem_ctx) ir_dereference_record(d->clone(mem_ctx, NULL),
|
|
type->fields.structure[i].name);
|
|
|
|
ir_rvalue *const rhs = ((ir_instruction *) node)->as_rvalue();
|
|
assert(rhs != NULL);
|
|
|
|
ir_instruction *const assign = new(mem_ctx) ir_assignment(lhs, rhs, NULL);
|
|
|
|
instructions->push_tail(assign);
|
|
node = node->next;
|
|
}
|
|
|
|
return d;
|
|
}
|
|
|
|
|
|
static ir_rvalue *
|
|
process_record_constructor(exec_list *instructions,
|
|
const glsl_type *constructor_type,
|
|
YYLTYPE *loc, exec_list *parameters,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
exec_list actual_parameters;
|
|
|
|
process_parameters(instructions, &actual_parameters,
|
|
parameters, state);
|
|
|
|
exec_node *node = actual_parameters.head;
|
|
for (unsigned i = 0; i < constructor_type->length; i++) {
|
|
ir_rvalue *ir = (ir_rvalue *) node;
|
|
|
|
if (node->is_tail_sentinel()) {
|
|
_mesa_glsl_error(loc, state,
|
|
"insufficient parameters to constructor for `%s'",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
if (apply_implicit_conversion(constructor_type->fields.structure[i].type,
|
|
ir, state)) {
|
|
node->replace_with(ir);
|
|
} else {
|
|
_mesa_glsl_error(loc, state,
|
|
"parameter type mismatch in constructor for `%s.%s' "
|
|
"(%s vs %s)",
|
|
constructor_type->name,
|
|
constructor_type->fields.structure[i].name,
|
|
ir->type->name,
|
|
constructor_type->fields.structure[i].type->name);
|
|
return ir_rvalue::error_value(ctx);;
|
|
}
|
|
|
|
node = node->next;
|
|
}
|
|
|
|
if (!node->is_tail_sentinel()) {
|
|
_mesa_glsl_error(loc, state, "too many parameters in constructor "
|
|
"for `%s'", constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
ir_rvalue *const constant =
|
|
constant_record_constructor(constructor_type, &actual_parameters,
|
|
state);
|
|
|
|
return (constant != NULL)
|
|
? constant
|
|
: emit_inline_record_constructor(constructor_type, instructions,
|
|
&actual_parameters, state);
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_function_expression::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
/* There are three sorts of function calls.
|
|
*
|
|
* 1. constructors - The first subexpression is an ast_type_specifier.
|
|
* 2. methods - Only the .length() method of array types.
|
|
* 3. functions - Calls to regular old functions.
|
|
*
|
|
* Method calls are actually detected when the ast_field_selection
|
|
* expression is handled.
|
|
*/
|
|
if (is_constructor()) {
|
|
const ast_type_specifier *type = (ast_type_specifier *) subexpressions[0];
|
|
YYLTYPE loc = type->get_location();
|
|
const char *name;
|
|
|
|
const glsl_type *const constructor_type = type->glsl_type(& name, state);
|
|
|
|
/* constructor_type can be NULL if a variable with the same name as the
|
|
* structure has come into scope.
|
|
*/
|
|
if (constructor_type == NULL) {
|
|
_mesa_glsl_error(& loc, state, "unknown type `%s' (structure name "
|
|
"may be shadowed by a variable with the same name)",
|
|
type->type_name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
|
|
/* Constructors for samplers are illegal.
|
|
*/
|
|
if (constructor_type->is_sampler()) {
|
|
_mesa_glsl_error(& loc, state, "cannot construct sampler type `%s'",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
if (constructor_type->is_array()) {
|
|
if (!state->check_version(120, 300, &loc,
|
|
"array constructors forbidden")) {
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
return process_array_constructor(instructions, constructor_type,
|
|
& loc, &this->expressions, state);
|
|
}
|
|
|
|
|
|
/* There are two kinds of constructor calls. Constructors for arrays and
|
|
* structures must have the exact number of arguments with matching types
|
|
* in the correct order. These constructors follow essentially the same
|
|
* type matching rules as functions.
|
|
*
|
|
* Constructors for built-in language types, such as mat4 and vec2, are
|
|
* free form. The only requirements are that the parameters must provide
|
|
* enough values of the correct scalar type and that no arguments are
|
|
* given past the last used argument.
|
|
*
|
|
* When using the C-style initializer syntax from GLSL 4.20, constructors
|
|
* must have the exact number of arguments with matching types in the
|
|
* correct order.
|
|
*/
|
|
if (constructor_type->is_record()) {
|
|
return process_record_constructor(instructions, constructor_type,
|
|
&loc, &this->expressions,
|
|
state);
|
|
}
|
|
|
|
if (!constructor_type->is_numeric() && !constructor_type->is_boolean())
|
|
return ir_rvalue::error_value(ctx);
|
|
|
|
/* Total number of components of the type being constructed. */
|
|
const unsigned type_components = constructor_type->components();
|
|
|
|
/* Number of components from parameters that have actually been
|
|
* consumed. This is used to perform several kinds of error checking.
|
|
*/
|
|
unsigned components_used = 0;
|
|
|
|
unsigned matrix_parameters = 0;
|
|
unsigned nonmatrix_parameters = 0;
|
|
exec_list actual_parameters;
|
|
glsl_precision params_precision = glsl_precision_undefined;
|
|
|
|
foreach_list_typed(ast_node, ast, link, &this->expressions) {
|
|
ir_rvalue *result = ast->hir(instructions, state);
|
|
|
|
/* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
|
|
*
|
|
* "It is an error to provide extra arguments beyond this
|
|
* last used argument."
|
|
*/
|
|
if (components_used >= type_components) {
|
|
_mesa_glsl_error(& loc, state, "too many parameters to `%s' "
|
|
"constructor",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
if (!result->type->is_numeric() && !result->type->is_boolean()) {
|
|
_mesa_glsl_error(& loc, state, "cannot construct `%s' from a "
|
|
"non-numeric data type",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* Count the number of matrix and nonmatrix parameters. This
|
|
* is used below to enforce some of the constructor rules.
|
|
*/
|
|
if (result->type->is_matrix())
|
|
matrix_parameters++;
|
|
else
|
|
nonmatrix_parameters++;
|
|
|
|
actual_parameters.push_tail(result);
|
|
params_precision = higher_precision(params_precision, result->get_precision());
|
|
components_used += result->type->components();
|
|
}
|
|
|
|
/* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
|
|
*
|
|
* "It is an error to construct matrices from other matrices. This
|
|
* is reserved for future use."
|
|
*/
|
|
if (matrix_parameters > 0
|
|
&& constructor_type->is_matrix()
|
|
&& !state->check_version(120, 100, &loc,
|
|
"cannot construct `%s' from a matrix",
|
|
constructor_type->name)) {
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
|
|
*
|
|
* "If a matrix argument is given to a matrix constructor, it is
|
|
* an error to have any other arguments."
|
|
*/
|
|
if ((matrix_parameters > 0)
|
|
&& ((matrix_parameters + nonmatrix_parameters) > 1)
|
|
&& constructor_type->is_matrix()) {
|
|
_mesa_glsl_error(& loc, state, "for matrix `%s' constructor, "
|
|
"matrix must be only parameter",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
|
|
*
|
|
* "In these cases, there must be enough components provided in the
|
|
* arguments to provide an initializer for every component in the
|
|
* constructed value."
|
|
*/
|
|
if (components_used < type_components && components_used != 1
|
|
&& matrix_parameters == 0) {
|
|
_mesa_glsl_error(& loc, state, "too few components to construct "
|
|
"`%s'",
|
|
constructor_type->name);
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
/* Later, we cast each parameter to the same base type as the
|
|
* constructor. Since there are no non-floating point matrices, we
|
|
* need to break them up into a series of column vectors.
|
|
*/
|
|
if (constructor_type->base_type != GLSL_TYPE_FLOAT) {
|
|
foreach_in_list_safe(ir_rvalue, matrix, &actual_parameters) {
|
|
if (!matrix->type->is_matrix())
|
|
continue;
|
|
|
|
/* Create a temporary containing the matrix. */
|
|
ir_variable *var = new(ctx) ir_variable(matrix->type, "matrix_tmp",
|
|
ir_var_temporary, matrix->get_precision());
|
|
instructions->push_tail(var);
|
|
instructions->push_tail(new(ctx) ir_assignment(new(ctx)
|
|
ir_dereference_variable(var), matrix, NULL));
|
|
var->constant_value = matrix->constant_expression_value();
|
|
|
|
/* Replace the matrix with dereferences of its columns. */
|
|
for (int i = 0; i < (int)matrix->type->matrix_columns; i++) {
|
|
matrix->insert_before(new (ctx) ir_dereference_array(var,
|
|
new(ctx) ir_constant(i)));
|
|
}
|
|
matrix->remove();
|
|
}
|
|
}
|
|
|
|
bool all_parameters_are_constant = true;
|
|
|
|
/* Type cast each parameter and, if possible, fold constants.*/
|
|
foreach_in_list_safe(ir_rvalue, ir, &actual_parameters) {
|
|
const glsl_type *desired_type =
|
|
glsl_type::get_instance(constructor_type->base_type,
|
|
ir->type->vector_elements,
|
|
ir->type->matrix_columns);
|
|
ir_rvalue *result = convert_component(ir, desired_type);
|
|
|
|
/* Attempt to convert the parameter to a constant valued expression.
|
|
* After doing so, track whether or not all the parameters to the
|
|
* constructor are trivially constant valued expressions.
|
|
*/
|
|
ir_rvalue *const constant = result->constant_expression_value();
|
|
|
|
if (constant != NULL)
|
|
result = constant;
|
|
else
|
|
all_parameters_are_constant = false;
|
|
|
|
if (result != ir) {
|
|
ir->replace_with(result);
|
|
}
|
|
}
|
|
|
|
/* If all of the parameters are trivially constant, create a
|
|
* constant representing the complete collection of parameters.
|
|
*/
|
|
if (all_parameters_are_constant) {
|
|
return new(ctx) ir_constant(constructor_type, &actual_parameters);
|
|
} else if (constructor_type->is_scalar()) {
|
|
return dereference_component((ir_rvalue *) actual_parameters.head,
|
|
0);
|
|
} else if (constructor_type->is_vector()) {
|
|
return emit_inline_vector_constructor(constructor_type, params_precision,
|
|
instructions,
|
|
&actual_parameters,
|
|
ctx);
|
|
} else {
|
|
assert(constructor_type->is_matrix());
|
|
return emit_inline_matrix_constructor(constructor_type, params_precision,
|
|
instructions,
|
|
&actual_parameters,
|
|
ctx);
|
|
}
|
|
} else {
|
|
const ast_expression *id = subexpressions[0];
|
|
const char *func_name = id->primary_expression.identifier;
|
|
YYLTYPE loc = get_location();
|
|
exec_list actual_parameters;
|
|
|
|
process_parameters(instructions, &actual_parameters, &this->expressions,
|
|
state);
|
|
|
|
ir_function_signature *sig =
|
|
match_function_by_name(func_name, &actual_parameters, state);
|
|
|
|
ir_rvalue *value = NULL;
|
|
if (sig == NULL) {
|
|
no_matching_function_error(func_name, &loc, &actual_parameters, state);
|
|
value = ir_rvalue::error_value(ctx);
|
|
} else if (!verify_parameter_modes(state, sig, actual_parameters, this->expressions)) {
|
|
/* an error has already been emitted */
|
|
value = ir_rvalue::error_value(ctx);
|
|
} else {
|
|
value = generate_call(instructions, sig, &actual_parameters, state);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
ir_rvalue *
|
|
ast_aggregate_initializer::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
YYLTYPE loc = this->get_location();
|
|
|
|
if (!this->constructor_type) {
|
|
_mesa_glsl_error(&loc, state, "type of C-style initializer unknown");
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
const glsl_type *const constructor_type = this->constructor_type;
|
|
|
|
if (!state->ARB_shading_language_420pack_enable) {
|
|
_mesa_glsl_error(&loc, state, "C-style initialization requires the "
|
|
"GL_ARB_shading_language_420pack extension");
|
|
return ir_rvalue::error_value(ctx);
|
|
}
|
|
|
|
if (constructor_type->is_array()) {
|
|
return process_array_constructor(instructions, constructor_type, &loc,
|
|
&this->expressions, state);
|
|
}
|
|
|
|
if (constructor_type->is_record()) {
|
|
return process_record_constructor(instructions, constructor_type, &loc,
|
|
&this->expressions, state);
|
|
}
|
|
|
|
return process_vec_mat_constructor(instructions, constructor_type, &loc,
|
|
&this->expressions, state);
|
|
}
|