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-rw-r--r--mesalib/src/glsl/ir_reader.cpp2012
1 files changed, 1007 insertions, 1005 deletions
diff --git a/mesalib/src/glsl/ir_reader.cpp b/mesalib/src/glsl/ir_reader.cpp
index 201e436be..f3a621734 100644
--- a/mesalib/src/glsl/ir_reader.cpp
+++ b/mesalib/src/glsl/ir_reader.cpp
@@ -1,1005 +1,1007 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include "ir_reader.h"
-#include "glsl_parser_extras.h"
-#include "glsl_types.h"
-#include "s_expression.h"
-
-const static bool debug = false;
-
-class ir_reader {
-public:
- ir_reader(_mesa_glsl_parse_state *);
-
- void read(exec_list *instructions, const char *src, bool scan_for_protos);
-
-private:
- void *mem_ctx;
- _mesa_glsl_parse_state *state;
-
- void ir_read_error(s_expression *, const char *fmt, ...);
-
- const glsl_type *read_type(s_expression *);
-
- void scan_for_prototypes(exec_list *, s_expression *);
- ir_function *read_function(s_expression *, bool skip_body);
- void read_function_sig(ir_function *, s_expression *, bool skip_body);
-
- void read_instructions(exec_list *, s_expression *, ir_loop *);
- ir_instruction *read_instruction(s_expression *, ir_loop *);
- ir_variable *read_declaration(s_expression *);
- ir_if *read_if(s_expression *, ir_loop *);
- ir_loop *read_loop(s_expression *);
- ir_return *read_return(s_expression *);
- ir_rvalue *read_rvalue(s_expression *);
- ir_assignment *read_assignment(s_expression *);
- ir_expression *read_expression(s_expression *);
- ir_call *read_call(s_expression *);
- ir_swizzle *read_swizzle(s_expression *);
- ir_constant *read_constant(s_expression *);
- ir_texture *read_texture(s_expression *);
-
- ir_dereference *read_dereference(s_expression *);
-};
-
-ir_reader::ir_reader(_mesa_glsl_parse_state *state) : state(state)
-{
- this->mem_ctx = state;
-}
-
-void
-_mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions,
- const char *src, bool scan_for_protos)
-{
- ir_reader r(state);
- r.read(instructions, src, scan_for_protos);
-}
-
-void
-ir_reader::read(exec_list *instructions, const char *src, bool scan_for_protos)
-{
- s_expression *expr = s_expression::read_expression(mem_ctx, src);
- if (expr == NULL) {
- ir_read_error(NULL, "couldn't parse S-Expression.");
- return;
- }
-
- if (scan_for_protos) {
- scan_for_prototypes(instructions, expr);
- if (state->error)
- return;
- }
-
- read_instructions(instructions, expr, NULL);
- ralloc_free(expr);
-
- if (debug)
- validate_ir_tree(instructions);
-}
-
-void
-ir_reader::ir_read_error(s_expression *expr, const char *fmt, ...)
-{
- va_list ap;
-
- state->error = true;
-
- if (state->current_function != NULL)
- ralloc_asprintf_append(&state->info_log, "In function %s:\n",
- state->current_function->function_name());
- ralloc_strcat(&state->info_log, "error: ");
-
- va_start(ap, fmt);
- ralloc_vasprintf_append(&state->info_log, fmt, ap);
- va_end(ap);
- ralloc_strcat(&state->info_log, "\n");
-
- if (expr != NULL) {
- ralloc_strcat(&state->info_log, "...in this context:\n ");
- expr->print();
- ralloc_strcat(&state->info_log, "\n\n");
- }
-}
-
-const glsl_type *
-ir_reader::read_type(s_expression *expr)
-{
- s_expression *s_base_type;
- s_int *s_size;
-
- s_pattern pat[] = { "array", s_base_type, s_size };
- if (MATCH(expr, pat)) {
- const glsl_type *base_type = read_type(s_base_type);
- if (base_type == NULL) {
- ir_read_error(NULL, "when reading base type of array type");
- return NULL;
- }
-
- return glsl_type::get_array_instance(base_type, s_size->value());
- }
-
- s_symbol *type_sym = SX_AS_SYMBOL(expr);
- if (type_sym == NULL) {
- ir_read_error(expr, "expected <type>");
- return NULL;
- }
-
- const glsl_type *type = state->symbols->get_type(type_sym->value());
- if (type == NULL)
- ir_read_error(expr, "invalid type: %s", type_sym->value());
-
- return type;
-}
-
-
-void
-ir_reader::scan_for_prototypes(exec_list *instructions, s_expression *expr)
-{
- s_list *list = SX_AS_LIST(expr);
- if (list == NULL) {
- ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
- return;
- }
-
- foreach_iter(exec_list_iterator, it, list->subexpressions) {
- s_list *sub = SX_AS_LIST(it.get());
- if (sub == NULL)
- continue; // not a (function ...); ignore it.
-
- s_symbol *tag = SX_AS_SYMBOL(sub->subexpressions.get_head());
- if (tag == NULL || strcmp(tag->value(), "function") != 0)
- continue; // not a (function ...); ignore it.
-
- ir_function *f = read_function(sub, true);
- if (f == NULL)
- return;
- instructions->push_tail(f);
- }
-}
-
-ir_function *
-ir_reader::read_function(s_expression *expr, bool skip_body)
-{
- bool added = false;
- s_symbol *name;
-
- s_pattern pat[] = { "function", name };
- if (!PARTIAL_MATCH(expr, pat)) {
- ir_read_error(expr, "Expected (function <name> (signature ...) ...)");
- return NULL;
- }
-
- ir_function *f = state->symbols->get_function(name->value());
- if (f == NULL) {
- f = new(mem_ctx) ir_function(name->value());
- added = state->symbols->add_function(f);
- assert(added);
- }
-
- exec_list_iterator it = ((s_list *) expr)->subexpressions.iterator();
- it.next(); // skip "function" tag
- it.next(); // skip function name
- for (/* nothing */; it.has_next(); it.next()) {
- s_expression *s_sig = (s_expression *) it.get();
- read_function_sig(f, s_sig, skip_body);
- }
- return added ? f : NULL;
-}
-
-void
-ir_reader::read_function_sig(ir_function *f, s_expression *expr, bool skip_body)
-{
- s_expression *type_expr;
- s_list *paramlist;
- s_list *body_list;
-
- s_pattern pat[] = { "signature", type_expr, paramlist, body_list };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "Expected (signature <type> (parameters ...) "
- "(<instruction> ...))");
- return;
- }
-
- const glsl_type *return_type = read_type(type_expr);
- if (return_type == NULL)
- return;
-
- s_symbol *paramtag = SX_AS_SYMBOL(paramlist->subexpressions.get_head());
- if (paramtag == NULL || strcmp(paramtag->value(), "parameters") != 0) {
- ir_read_error(paramlist, "Expected (parameters ...)");
- return;
- }
-
- // Read the parameters list into a temporary place.
- exec_list hir_parameters;
- state->symbols->push_scope();
-
- exec_list_iterator it = paramlist->subexpressions.iterator();
- for (it.next() /* skip "parameters" */; it.has_next(); it.next()) {
- ir_variable *var = read_declaration((s_expression *) it.get());
- if (var == NULL)
- return;
-
- hir_parameters.push_tail(var);
- }
-
- ir_function_signature *sig = f->exact_matching_signature(&hir_parameters);
- if (sig == NULL && skip_body) {
- /* If scanning for prototypes, generate a new signature. */
- sig = new(mem_ctx) ir_function_signature(return_type);
- sig->is_builtin = true;
- f->add_signature(sig);
- } else if (sig != NULL) {
- const char *badvar = sig->qualifiers_match(&hir_parameters);
- if (badvar != NULL) {
- ir_read_error(expr, "function `%s' parameter `%s' qualifiers "
- "don't match prototype", f->name, badvar);
- return;
- }
-
- if (sig->return_type != return_type) {
- ir_read_error(expr, "function `%s' return type doesn't "
- "match prototype", f->name);
- return;
- }
- } else {
- /* No prototype for this body exists - skip it. */
- state->symbols->pop_scope();
- return;
- }
- assert(sig != NULL);
-
- sig->replace_parameters(&hir_parameters);
-
- if (!skip_body && !body_list->subexpressions.is_empty()) {
- if (sig->is_defined) {
- ir_read_error(expr, "function %s redefined", f->name);
- return;
- }
- state->current_function = sig;
- read_instructions(&sig->body, body_list, NULL);
- state->current_function = NULL;
- sig->is_defined = true;
- }
-
- state->symbols->pop_scope();
-}
-
-void
-ir_reader::read_instructions(exec_list *instructions, s_expression *expr,
- ir_loop *loop_ctx)
-{
- // Read in a list of instructions
- s_list *list = SX_AS_LIST(expr);
- if (list == NULL) {
- ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
- return;
- }
-
- foreach_iter(exec_list_iterator, it, list->subexpressions) {
- s_expression *sub = (s_expression*) it.get();
- ir_instruction *ir = read_instruction(sub, loop_ctx);
- if (ir != NULL) {
- /* Global variable declarations should be moved to the top, before
- * any functions that might use them. Functions are added to the
- * instruction stream when scanning for prototypes, so without this
- * hack, they always appear before variable declarations.
- */
- if (state->current_function == NULL && ir->as_variable() != NULL)
- instructions->push_head(ir);
- else
- instructions->push_tail(ir);
- }
- }
-}
-
-
-ir_instruction *
-ir_reader::read_instruction(s_expression *expr, ir_loop *loop_ctx)
-{
- s_symbol *symbol = SX_AS_SYMBOL(expr);
- if (symbol != NULL) {
- if (strcmp(symbol->value(), "break") == 0 && loop_ctx != NULL)
- return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_break);
- if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL)
- return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_continue);
- }
-
- s_list *list = SX_AS_LIST(expr);
- if (list == NULL || list->subexpressions.is_empty()) {
- ir_read_error(expr, "Invalid instruction.\n");
- return NULL;
- }
-
- s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
- if (tag == NULL) {
- ir_read_error(expr, "expected instruction tag");
- return NULL;
- }
-
- ir_instruction *inst = NULL;
- if (strcmp(tag->value(), "declare") == 0) {
- inst = read_declaration(list);
- } else if (strcmp(tag->value(), "assign") == 0) {
- inst = read_assignment(list);
- } else if (strcmp(tag->value(), "if") == 0) {
- inst = read_if(list, loop_ctx);
- } else if (strcmp(tag->value(), "loop") == 0) {
- inst = read_loop(list);
- } else if (strcmp(tag->value(), "return") == 0) {
- inst = read_return(list);
- } else if (strcmp(tag->value(), "function") == 0) {
- inst = read_function(list, false);
- } else {
- inst = read_rvalue(list);
- if (inst == NULL)
- ir_read_error(NULL, "when reading instruction");
- }
- return inst;
-}
-
-ir_variable *
-ir_reader::read_declaration(s_expression *expr)
-{
- s_list *s_quals;
- s_expression *s_type;
- s_symbol *s_name;
-
- s_pattern pat[] = { "declare", s_quals, s_type, s_name };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (declare (<qualifiers>) <type> <name>)");
- return NULL;
- }
-
- const glsl_type *type = read_type(s_type);
- if (type == NULL)
- return NULL;
-
- ir_variable *var = new(mem_ctx) ir_variable(type, s_name->value(),
- ir_var_auto);
-
- foreach_iter(exec_list_iterator, it, s_quals->subexpressions) {
- s_symbol *qualifier = SX_AS_SYMBOL(it.get());
- if (qualifier == NULL) {
- ir_read_error(expr, "qualifier list must contain only symbols");
- return NULL;
- }
-
- // FINISHME: Check for duplicate/conflicting qualifiers.
- if (strcmp(qualifier->value(), "centroid") == 0) {
- var->centroid = 1;
- } else if (strcmp(qualifier->value(), "invariant") == 0) {
- var->invariant = 1;
- } else if (strcmp(qualifier->value(), "uniform") == 0) {
- var->mode = ir_var_uniform;
- } else if (strcmp(qualifier->value(), "auto") == 0) {
- var->mode = ir_var_auto;
- } else if (strcmp(qualifier->value(), "in") == 0) {
- var->mode = ir_var_in;
- } else if (strcmp(qualifier->value(), "const_in") == 0) {
- var->mode = ir_var_const_in;
- } else if (strcmp(qualifier->value(), "out") == 0) {
- var->mode = ir_var_out;
- } else if (strcmp(qualifier->value(), "inout") == 0) {
- var->mode = ir_var_inout;
- } else if (strcmp(qualifier->value(), "smooth") == 0) {
- var->interpolation = ir_var_smooth;
- } else if (strcmp(qualifier->value(), "flat") == 0) {
- var->interpolation = ir_var_flat;
- } else if (strcmp(qualifier->value(), "noperspective") == 0) {
- var->interpolation = ir_var_noperspective;
- } else {
- ir_read_error(expr, "unknown qualifier: %s", qualifier->value());
- return NULL;
- }
- }
-
- // Add the variable to the symbol table
- state->symbols->add_variable(var);
-
- return var;
-}
-
-
-ir_if *
-ir_reader::read_if(s_expression *expr, ir_loop *loop_ctx)
-{
- s_expression *s_cond;
- s_expression *s_then;
- s_expression *s_else;
-
- s_pattern pat[] = { "if", s_cond, s_then, s_else };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (if <condition> (<then>...) (<else>...))");
- return NULL;
- }
-
- ir_rvalue *condition = read_rvalue(s_cond);
- if (condition == NULL) {
- ir_read_error(NULL, "when reading condition of (if ...)");
- return NULL;
- }
-
- ir_if *iff = new(mem_ctx) ir_if(condition);
-
- read_instructions(&iff->then_instructions, s_then, loop_ctx);
- read_instructions(&iff->else_instructions, s_else, loop_ctx);
- if (state->error) {
- delete iff;
- iff = NULL;
- }
- return iff;
-}
-
-
-ir_loop *
-ir_reader::read_loop(s_expression *expr)
-{
- s_expression *s_counter, *s_from, *s_to, *s_inc, *s_body;
-
- s_pattern pat[] = { "loop", s_counter, s_from, s_to, s_inc, s_body };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (loop <counter> <from> <to> "
- "<increment> <body>)");
- return NULL;
- }
-
- // FINISHME: actually read the count/from/to fields.
-
- ir_loop *loop = new(mem_ctx) ir_loop;
- read_instructions(&loop->body_instructions, s_body, loop);
- if (state->error) {
- delete loop;
- loop = NULL;
- }
- return loop;
-}
-
-
-ir_return *
-ir_reader::read_return(s_expression *expr)
-{
- s_expression *s_retval;
-
- s_pattern pat[] = { "return", s_retval};
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (return <rvalue>)");
- return NULL;
- }
-
- ir_rvalue *retval = read_rvalue(s_retval);
- if (retval == NULL) {
- ir_read_error(NULL, "when reading return value");
- return NULL;
- }
-
- return new(mem_ctx) ir_return(retval);
-}
-
-
-ir_rvalue *
-ir_reader::read_rvalue(s_expression *expr)
-{
- s_list *list = SX_AS_LIST(expr);
- if (list == NULL || list->subexpressions.is_empty())
- return NULL;
-
- s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
- if (tag == NULL) {
- ir_read_error(expr, "expected rvalue tag");
- return NULL;
- }
-
- ir_rvalue *rvalue = read_dereference(list);
- if (rvalue != NULL || state->error)
- return rvalue;
- else if (strcmp(tag->value(), "swiz") == 0) {
- rvalue = read_swizzle(list);
- } else if (strcmp(tag->value(), "expression") == 0) {
- rvalue = read_expression(list);
- } else if (strcmp(tag->value(), "call") == 0) {
- rvalue = read_call(list);
- } else if (strcmp(tag->value(), "constant") == 0) {
- rvalue = read_constant(list);
- } else {
- rvalue = read_texture(list);
- if (rvalue == NULL && !state->error)
- ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value());
- }
-
- return rvalue;
-}
-
-ir_assignment *
-ir_reader::read_assignment(s_expression *expr)
-{
- s_expression *cond_expr = NULL;
- s_expression *lhs_expr, *rhs_expr;
- s_list *mask_list;
-
- s_pattern pat4[] = { "assign", mask_list, lhs_expr, rhs_expr };
- s_pattern pat5[] = { "assign", cond_expr, mask_list, lhs_expr, rhs_expr };
- if (!MATCH(expr, pat4) && !MATCH(expr, pat5)) {
- ir_read_error(expr, "expected (assign [<condition>] (<write mask>) "
- "<lhs> <rhs>)");
- return NULL;
- }
-
- ir_rvalue *condition = NULL;
- if (cond_expr != NULL) {
- condition = read_rvalue(cond_expr);
- if (condition == NULL) {
- ir_read_error(NULL, "when reading condition of assignment");
- return NULL;
- }
- }
-
- unsigned mask = 0;
-
- s_symbol *mask_symbol;
- s_pattern mask_pat[] = { mask_symbol };
- if (MATCH(mask_list, mask_pat)) {
- const char *mask_str = mask_symbol->value();
- unsigned mask_length = strlen(mask_str);
- if (mask_length > 4) {
- ir_read_error(expr, "invalid write mask: %s", mask_str);
- return NULL;
- }
-
- const unsigned idx_map[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
-
- for (unsigned i = 0; i < mask_length; i++) {
- if (mask_str[i] < 'w' || mask_str[i] > 'z') {
- ir_read_error(expr, "write mask contains invalid character: %c",
- mask_str[i]);
- return NULL;
- }
- mask |= 1 << idx_map[mask_str[i] - 'w'];
- }
- } else if (!mask_list->subexpressions.is_empty()) {
- ir_read_error(mask_list, "expected () or (<write mask>)");
- return NULL;
- }
-
- ir_dereference *lhs = read_dereference(lhs_expr);
- if (lhs == NULL) {
- ir_read_error(NULL, "when reading left-hand side of assignment");
- return NULL;
- }
-
- ir_rvalue *rhs = read_rvalue(rhs_expr);
- if (rhs == NULL) {
- ir_read_error(NULL, "when reading right-hand side of assignment");
- return NULL;
- }
-
- if (mask == 0 && (lhs->type->is_vector() || lhs->type->is_scalar())) {
- ir_read_error(expr, "non-zero write mask required.");
- return NULL;
- }
-
- return new(mem_ctx) ir_assignment(lhs, rhs, condition, mask);
-}
-
-ir_call *
-ir_reader::read_call(s_expression *expr)
-{
- s_symbol *name;
- s_list *params;
-
- s_pattern pat[] = { "call", name, params };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (call <name> (<param> ...))");
- return NULL;
- }
-
- exec_list parameters;
-
- foreach_iter(exec_list_iterator, it, params->subexpressions) {
- s_expression *expr = (s_expression*) it.get();
- ir_rvalue *param = read_rvalue(expr);
- if (param == NULL) {
- ir_read_error(expr, "when reading parameter to function call");
- return NULL;
- }
- parameters.push_tail(param);
- }
-
- ir_function *f = state->symbols->get_function(name->value());
- if (f == NULL) {
- ir_read_error(expr, "found call to undefined function %s",
- name->value());
- return NULL;
- }
-
- ir_function_signature *callee = f->matching_signature(&parameters);
- if (callee == NULL) {
- ir_read_error(expr, "couldn't find matching signature for function "
- "%s", name->value());
- return NULL;
- }
-
- return new(mem_ctx) ir_call(callee, &parameters);
-}
-
-ir_expression *
-ir_reader::read_expression(s_expression *expr)
-{
- s_expression *s_type;
- s_symbol *s_op;
- s_expression *s_arg1;
-
- s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
- if (!PARTIAL_MATCH(expr, pat)) {
- ir_read_error(expr, "expected (expression <type> <operator> "
- "<operand> [<operand>])");
- return NULL;
- }
- s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
-
- const glsl_type *type = read_type(s_type);
- if (type == NULL)
- return NULL;
-
- /* Read the operator */
- ir_expression_operation op = ir_expression::get_operator(s_op->value());
- if (op == (ir_expression_operation) -1) {
- ir_read_error(expr, "invalid operator: %s", s_op->value());
- return NULL;
- }
-
- unsigned num_operands = ir_expression::get_num_operands(op);
- if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
- ir_read_error(expr, "expected (expression <type> %s <operand>)",
- s_op->value());
- return NULL;
- }
-
- ir_rvalue *arg1 = read_rvalue(s_arg1);
- ir_rvalue *arg2 = NULL;
- if (arg1 == NULL) {
- ir_read_error(NULL, "when reading first operand of %s", s_op->value());
- return NULL;
- }
-
- if (num_operands == 2) {
- if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
- ir_read_error(expr, "expected (expression <type> %s <operand> "
- "<operand>)", s_op->value());
- return NULL;
- }
- arg2 = read_rvalue(s_arg2);
- if (arg2 == NULL) {
- ir_read_error(NULL, "when reading second operand of %s",
- s_op->value());
- return NULL;
- }
- }
-
- return new(mem_ctx) ir_expression(op, type, arg1, arg2);
-}
-
-ir_swizzle *
-ir_reader::read_swizzle(s_expression *expr)
-{
- s_symbol *swiz;
- s_expression *sub;
-
- s_pattern pat[] = { "swiz", swiz, sub };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (swiz <swizzle> <rvalue>)");
- return NULL;
- }
-
- if (strlen(swiz->value()) > 4) {
- ir_read_error(expr, "expected a valid swizzle; found %s", swiz->value());
- return NULL;
- }
-
- ir_rvalue *rvalue = read_rvalue(sub);
- if (rvalue == NULL)
- return NULL;
-
- ir_swizzle *ir = ir_swizzle::create(rvalue, swiz->value(),
- rvalue->type->vector_elements);
- if (ir == NULL)
- ir_read_error(expr, "invalid swizzle");
-
- return ir;
-}
-
-ir_constant *
-ir_reader::read_constant(s_expression *expr)
-{
- s_expression *type_expr;
- s_list *values;
-
- s_pattern pat[] = { "constant", type_expr, values };
- if (!MATCH(expr, pat)) {
- ir_read_error(expr, "expected (constant <type> (...))");
- return NULL;
- }
-
- const glsl_type *type = read_type(type_expr);
- if (type == NULL)
- return NULL;
-
- if (values == NULL) {
- ir_read_error(expr, "expected (constant <type> (...))");
- return NULL;
- }
-
- if (type->is_array()) {
- unsigned elements_supplied = 0;
- exec_list elements;
- foreach_iter(exec_list_iterator, it, values->subexpressions) {
- s_expression *elt = (s_expression *) it.get();
- ir_constant *ir_elt = read_constant(elt);
- if (ir_elt == NULL)
- return NULL;
- elements.push_tail(ir_elt);
- elements_supplied++;
- }
-
- if (elements_supplied != type->length) {
- ir_read_error(values, "expected exactly %u array elements, "
- "given %u", type->length, elements_supplied);
- return NULL;
- }
- return new(mem_ctx) ir_constant(type, &elements);
- }
-
- const glsl_type *const base_type = type->get_base_type();
-
- ir_constant_data data = { { 0 } };
-
- // Read in list of values (at most 16).
- int k = 0;
- foreach_iter(exec_list_iterator, it, values->subexpressions) {
- if (k >= 16) {
- ir_read_error(values, "expected at most 16 numbers");
- return NULL;
- }
-
- s_expression *expr = (s_expression*) it.get();
-
- if (base_type->base_type == GLSL_TYPE_FLOAT) {
- s_number *value = SX_AS_NUMBER(expr);
- if (value == NULL) {
- ir_read_error(values, "expected numbers");
- return NULL;
- }
- data.f[k] = value->fvalue();
- } else {
- s_int *value = SX_AS_INT(expr);
- if (value == NULL) {
- ir_read_error(values, "expected integers");
- return NULL;
- }
-
- switch (base_type->base_type) {
- case GLSL_TYPE_UINT: {
- data.u[k] = value->value();
- break;
- }
- case GLSL_TYPE_INT: {
- data.i[k] = value->value();
- break;
- }
- case GLSL_TYPE_BOOL: {
- data.b[k] = value->value();
- break;
- }
- default:
- ir_read_error(values, "unsupported constant type");
- return NULL;
- }
- }
- ++k;
- }
-
- return new(mem_ctx) ir_constant(type, &data);
-}
-
-ir_dereference *
-ir_reader::read_dereference(s_expression *expr)
-{
- s_symbol *s_var;
- s_expression *s_subject;
- s_expression *s_index;
- s_symbol *s_field;
-
- s_pattern var_pat[] = { "var_ref", s_var };
- s_pattern array_pat[] = { "array_ref", s_subject, s_index };
- s_pattern record_pat[] = { "record_ref", s_subject, s_field };
-
- if (MATCH(expr, var_pat)) {
- ir_variable *var = state->symbols->get_variable(s_var->value());
- if (var == NULL) {
- ir_read_error(expr, "undeclared variable: %s", s_var->value());
- return NULL;
- }
- return new(mem_ctx) ir_dereference_variable(var);
- } else if (MATCH(expr, array_pat)) {
- ir_rvalue *subject = read_rvalue(s_subject);
- if (subject == NULL) {
- ir_read_error(NULL, "when reading the subject of an array_ref");
- return NULL;
- }
-
- ir_rvalue *idx = read_rvalue(s_index);
- if (subject == NULL) {
- ir_read_error(NULL, "when reading the index of an array_ref");
- return NULL;
- }
- return new(mem_ctx) ir_dereference_array(subject, idx);
- } else if (MATCH(expr, record_pat)) {
- ir_rvalue *subject = read_rvalue(s_subject);
- if (subject == NULL) {
- ir_read_error(NULL, "when reading the subject of a record_ref");
- return NULL;
- }
- return new(mem_ctx) ir_dereference_record(subject, s_field->value());
- }
- return NULL;
-}
-
-ir_texture *
-ir_reader::read_texture(s_expression *expr)
-{
- s_symbol *tag = NULL;
- s_expression *s_type = NULL;
- s_expression *s_sampler = NULL;
- s_expression *s_coord = NULL;
- s_expression *s_offset = NULL;
- s_expression *s_proj = NULL;
- s_list *s_shadow = NULL;
- s_expression *s_lod = NULL;
-
- ir_texture_opcode op = ir_tex; /* silence warning */
-
- s_pattern tex_pattern[] =
- { "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };
- s_pattern txf_pattern[] =
- { "txf", s_type, s_sampler, s_coord, s_offset, s_lod };
- s_pattern other_pattern[] =
- { tag, s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow, s_lod };
-
- if (MATCH(expr, tex_pattern)) {
- op = ir_tex;
- } else if (MATCH(expr, txf_pattern)) {
- op = ir_txf;
- } else if (MATCH(expr, other_pattern)) {
- op = ir_texture::get_opcode(tag->value());
- if (op == -1)
- return NULL;
- } else {
- ir_read_error(NULL, "unexpected texture pattern");
- return NULL;
- }
-
- ir_texture *tex = new(mem_ctx) ir_texture(op);
-
- // Read return type
- const glsl_type *type = read_type(s_type);
- if (type == NULL) {
- ir_read_error(NULL, "when reading type in (%s ...)",
- tex->opcode_string());
- return NULL;
- }
-
- // Read sampler (must be a deref)
- ir_dereference *sampler = read_dereference(s_sampler);
- if (sampler == NULL) {
- ir_read_error(NULL, "when reading sampler in (%s ...)",
- tex->opcode_string());
- return NULL;
- }
- tex->set_sampler(sampler, type);
-
- // Read coordinate (any rvalue)
- tex->coordinate = read_rvalue(s_coord);
- if (tex->coordinate == NULL) {
- ir_read_error(NULL, "when reading coordinate in (%s ...)",
- tex->opcode_string());
- return NULL;
- }
-
- // Read texel offset - either 0 or an rvalue.
- s_int *si_offset = SX_AS_INT(s_offset);
- if (si_offset == NULL || si_offset->value() != 0) {
- tex->offset = read_rvalue(s_offset);
- if (tex->offset == NULL) {
- ir_read_error(s_offset, "expected 0 or an expression");
- return NULL;
- }
- }
-
- if (op != ir_txf) {
- s_int *proj_as_int = SX_AS_INT(s_proj);
- if (proj_as_int && proj_as_int->value() == 1) {
- tex->projector = NULL;
- } else {
- tex->projector = read_rvalue(s_proj);
- if (tex->projector == NULL) {
- ir_read_error(NULL, "when reading projective divide in (%s ..)",
- tex->opcode_string());
- return NULL;
- }
- }
-
- if (s_shadow->subexpressions.is_empty()) {
- tex->shadow_comparitor = NULL;
- } else {
- tex->shadow_comparitor = read_rvalue(s_shadow);
- if (tex->shadow_comparitor == NULL) {
- ir_read_error(NULL, "when reading shadow comparitor in (%s ..)",
- tex->opcode_string());
- return NULL;
- }
- }
- }
-
- switch (op) {
- case ir_txb:
- tex->lod_info.bias = read_rvalue(s_lod);
- if (tex->lod_info.bias == NULL) {
- ir_read_error(NULL, "when reading LOD bias in (txb ...)");
- return NULL;
- }
- break;
- case ir_txl:
- case ir_txf:
- tex->lod_info.lod = read_rvalue(s_lod);
- if (tex->lod_info.lod == NULL) {
- ir_read_error(NULL, "when reading LOD in (%s ...)",
- tex->opcode_string());
- return NULL;
- }
- break;
- case ir_txd: {
- s_expression *s_dx, *s_dy;
- s_pattern dxdy_pat[] = { s_dx, s_dy };
- if (!MATCH(s_lod, dxdy_pat)) {
- ir_read_error(s_lod, "expected (dPdx dPdy) in (txd ...)");
- return NULL;
- }
- tex->lod_info.grad.dPdx = read_rvalue(s_dx);
- if (tex->lod_info.grad.dPdx == NULL) {
- ir_read_error(NULL, "when reading dPdx in (txd ...)");
- return NULL;
- }
- tex->lod_info.grad.dPdy = read_rvalue(s_dy);
- if (tex->lod_info.grad.dPdy == NULL) {
- ir_read_error(NULL, "when reading dPdy in (txd ...)");
- return NULL;
- }
- break;
- }
- default:
- // tex doesn't have any extra parameters.
- break;
- };
- return tex;
-}
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ir_reader.h"
+#include "glsl_parser_extras.h"
+#include "glsl_types.h"
+#include "s_expression.h"
+
+const static bool debug = false;
+
+class ir_reader {
+public:
+ ir_reader(_mesa_glsl_parse_state *);
+
+ void read(exec_list *instructions, const char *src, bool scan_for_protos);
+
+private:
+ void *mem_ctx;
+ _mesa_glsl_parse_state *state;
+
+ void ir_read_error(s_expression *, const char *fmt, ...);
+
+ const glsl_type *read_type(s_expression *);
+
+ void scan_for_prototypes(exec_list *, s_expression *);
+ ir_function *read_function(s_expression *, bool skip_body);
+ void read_function_sig(ir_function *, s_expression *, bool skip_body);
+
+ void read_instructions(exec_list *, s_expression *, ir_loop *);
+ ir_instruction *read_instruction(s_expression *, ir_loop *);
+ ir_variable *read_declaration(s_expression *);
+ ir_if *read_if(s_expression *, ir_loop *);
+ ir_loop *read_loop(s_expression *);
+ ir_return *read_return(s_expression *);
+ ir_rvalue *read_rvalue(s_expression *);
+ ir_assignment *read_assignment(s_expression *);
+ ir_expression *read_expression(s_expression *);
+ ir_call *read_call(s_expression *);
+ ir_swizzle *read_swizzle(s_expression *);
+ ir_constant *read_constant(s_expression *);
+ ir_texture *read_texture(s_expression *);
+
+ ir_dereference *read_dereference(s_expression *);
+};
+
+ir_reader::ir_reader(_mesa_glsl_parse_state *state) : state(state)
+{
+ this->mem_ctx = state;
+}
+
+void
+_mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions,
+ const char *src, bool scan_for_protos)
+{
+ ir_reader r(state);
+ r.read(instructions, src, scan_for_protos);
+}
+
+void
+ir_reader::read(exec_list *instructions, const char *src, bool scan_for_protos)
+{
+ s_expression *expr = s_expression::read_expression(mem_ctx, src);
+ if (expr == NULL) {
+ ir_read_error(NULL, "couldn't parse S-Expression.");
+ return;
+ }
+
+ if (scan_for_protos) {
+ scan_for_prototypes(instructions, expr);
+ if (state->error)
+ return;
+ }
+
+ read_instructions(instructions, expr, NULL);
+ ralloc_free(expr);
+
+ if (debug)
+ validate_ir_tree(instructions);
+}
+
+void
+ir_reader::ir_read_error(s_expression *expr, const char *fmt, ...)
+{
+ va_list ap;
+
+ state->error = true;
+
+ if (state->current_function != NULL)
+ ralloc_asprintf_append(&state->info_log, "In function %s:\n",
+ state->current_function->function_name());
+ ralloc_strcat(&state->info_log, "error: ");
+
+ va_start(ap, fmt);
+ ralloc_vasprintf_append(&state->info_log, fmt, ap);
+ va_end(ap);
+ ralloc_strcat(&state->info_log, "\n");
+
+ if (expr != NULL) {
+ ralloc_strcat(&state->info_log, "...in this context:\n ");
+ expr->print();
+ ralloc_strcat(&state->info_log, "\n\n");
+ }
+}
+
+const glsl_type *
+ir_reader::read_type(s_expression *expr)
+{
+ s_expression *s_base_type;
+ s_int *s_size;
+
+ s_pattern pat[] = { "array", s_base_type, s_size };
+ if (MATCH(expr, pat)) {
+ const glsl_type *base_type = read_type(s_base_type);
+ if (base_type == NULL) {
+ ir_read_error(NULL, "when reading base type of array type");
+ return NULL;
+ }
+
+ return glsl_type::get_array_instance(base_type, s_size->value());
+ }
+
+ s_symbol *type_sym = SX_AS_SYMBOL(expr);
+ if (type_sym == NULL) {
+ ir_read_error(expr, "expected <type>");
+ return NULL;
+ }
+
+ const glsl_type *type = state->symbols->get_type(type_sym->value());
+ if (type == NULL)
+ ir_read_error(expr, "invalid type: %s", type_sym->value());
+
+ return type;
+}
+
+
+void
+ir_reader::scan_for_prototypes(exec_list *instructions, s_expression *expr)
+{
+ s_list *list = SX_AS_LIST(expr);
+ if (list == NULL) {
+ ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
+ return;
+ }
+
+ foreach_iter(exec_list_iterator, it, list->subexpressions) {
+ s_list *sub = SX_AS_LIST(it.get());
+ if (sub == NULL)
+ continue; // not a (function ...); ignore it.
+
+ s_symbol *tag = SX_AS_SYMBOL(sub->subexpressions.get_head());
+ if (tag == NULL || strcmp(tag->value(), "function") != 0)
+ continue; // not a (function ...); ignore it.
+
+ ir_function *f = read_function(sub, true);
+ if (f == NULL)
+ return;
+ instructions->push_tail(f);
+ }
+}
+
+ir_function *
+ir_reader::read_function(s_expression *expr, bool skip_body)
+{
+ bool added = false;
+ s_symbol *name;
+
+ s_pattern pat[] = { "function", name };
+ if (!PARTIAL_MATCH(expr, pat)) {
+ ir_read_error(expr, "Expected (function <name> (signature ...) ...)");
+ return NULL;
+ }
+
+ ir_function *f = state->symbols->get_function(name->value());
+ if (f == NULL) {
+ f = new(mem_ctx) ir_function(name->value());
+ added = state->symbols->add_function(f);
+ assert(added);
+ }
+
+ exec_list_iterator it = ((s_list *) expr)->subexpressions.iterator();
+ it.next(); // skip "function" tag
+ it.next(); // skip function name
+ for (/* nothing */; it.has_next(); it.next()) {
+ s_expression *s_sig = (s_expression *) it.get();
+ read_function_sig(f, s_sig, skip_body);
+ }
+ return added ? f : NULL;
+}
+
+void
+ir_reader::read_function_sig(ir_function *f, s_expression *expr, bool skip_body)
+{
+ s_expression *type_expr;
+ s_list *paramlist;
+ s_list *body_list;
+
+ s_pattern pat[] = { "signature", type_expr, paramlist, body_list };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "Expected (signature <type> (parameters ...) "
+ "(<instruction> ...))");
+ return;
+ }
+
+ const glsl_type *return_type = read_type(type_expr);
+ if (return_type == NULL)
+ return;
+
+ s_symbol *paramtag = SX_AS_SYMBOL(paramlist->subexpressions.get_head());
+ if (paramtag == NULL || strcmp(paramtag->value(), "parameters") != 0) {
+ ir_read_error(paramlist, "Expected (parameters ...)");
+ return;
+ }
+
+ // Read the parameters list into a temporary place.
+ exec_list hir_parameters;
+ state->symbols->push_scope();
+
+ exec_list_iterator it = paramlist->subexpressions.iterator();
+ for (it.next() /* skip "parameters" */; it.has_next(); it.next()) {
+ ir_variable *var = read_declaration((s_expression *) it.get());
+ if (var == NULL)
+ return;
+
+ hir_parameters.push_tail(var);
+ }
+
+ ir_function_signature *sig = f->exact_matching_signature(&hir_parameters);
+ if (sig == NULL && skip_body) {
+ /* If scanning for prototypes, generate a new signature. */
+ sig = new(mem_ctx) ir_function_signature(return_type);
+ sig->is_builtin = true;
+ f->add_signature(sig);
+ } else if (sig != NULL) {
+ const char *badvar = sig->qualifiers_match(&hir_parameters);
+ if (badvar != NULL) {
+ ir_read_error(expr, "function `%s' parameter `%s' qualifiers "
+ "don't match prototype", f->name, badvar);
+ return;
+ }
+
+ if (sig->return_type != return_type) {
+ ir_read_error(expr, "function `%s' return type doesn't "
+ "match prototype", f->name);
+ return;
+ }
+ } else {
+ /* No prototype for this body exists - skip it. */
+ state->symbols->pop_scope();
+ return;
+ }
+ assert(sig != NULL);
+
+ sig->replace_parameters(&hir_parameters);
+
+ if (!skip_body && !body_list->subexpressions.is_empty()) {
+ if (sig->is_defined) {
+ ir_read_error(expr, "function %s redefined", f->name);
+ return;
+ }
+ state->current_function = sig;
+ read_instructions(&sig->body, body_list, NULL);
+ state->current_function = NULL;
+ sig->is_defined = true;
+ }
+
+ state->symbols->pop_scope();
+}
+
+void
+ir_reader::read_instructions(exec_list *instructions, s_expression *expr,
+ ir_loop *loop_ctx)
+{
+ // Read in a list of instructions
+ s_list *list = SX_AS_LIST(expr);
+ if (list == NULL) {
+ ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
+ return;
+ }
+
+ foreach_iter(exec_list_iterator, it, list->subexpressions) {
+ s_expression *sub = (s_expression*) it.get();
+ ir_instruction *ir = read_instruction(sub, loop_ctx);
+ if (ir != NULL) {
+ /* Global variable declarations should be moved to the top, before
+ * any functions that might use them. Functions are added to the
+ * instruction stream when scanning for prototypes, so without this
+ * hack, they always appear before variable declarations.
+ */
+ if (state->current_function == NULL && ir->as_variable() != NULL)
+ instructions->push_head(ir);
+ else
+ instructions->push_tail(ir);
+ }
+ }
+}
+
+
+ir_instruction *
+ir_reader::read_instruction(s_expression *expr, ir_loop *loop_ctx)
+{
+ s_symbol *symbol = SX_AS_SYMBOL(expr);
+ if (symbol != NULL) {
+ if (strcmp(symbol->value(), "break") == 0 && loop_ctx != NULL)
+ return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_break);
+ if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL)
+ return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_continue);
+ }
+
+ s_list *list = SX_AS_LIST(expr);
+ if (list == NULL || list->subexpressions.is_empty()) {
+ ir_read_error(expr, "Invalid instruction.\n");
+ return NULL;
+ }
+
+ s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
+ if (tag == NULL) {
+ ir_read_error(expr, "expected instruction tag");
+ return NULL;
+ }
+
+ ir_instruction *inst = NULL;
+ if (strcmp(tag->value(), "declare") == 0) {
+ inst = read_declaration(list);
+ } else if (strcmp(tag->value(), "assign") == 0) {
+ inst = read_assignment(list);
+ } else if (strcmp(tag->value(), "if") == 0) {
+ inst = read_if(list, loop_ctx);
+ } else if (strcmp(tag->value(), "loop") == 0) {
+ inst = read_loop(list);
+ } else if (strcmp(tag->value(), "return") == 0) {
+ inst = read_return(list);
+ } else if (strcmp(tag->value(), "function") == 0) {
+ inst = read_function(list, false);
+ } else {
+ inst = read_rvalue(list);
+ if (inst == NULL)
+ ir_read_error(NULL, "when reading instruction");
+ }
+ return inst;
+}
+
+ir_variable *
+ir_reader::read_declaration(s_expression *expr)
+{
+ s_list *s_quals;
+ s_expression *s_type;
+ s_symbol *s_name;
+
+ s_pattern pat[] = { "declare", s_quals, s_type, s_name };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (declare (<qualifiers>) <type> <name>)");
+ return NULL;
+ }
+
+ const glsl_type *type = read_type(s_type);
+ if (type == NULL)
+ return NULL;
+
+ ir_variable *var = new(mem_ctx) ir_variable(type, s_name->value(),
+ ir_var_auto);
+
+ foreach_iter(exec_list_iterator, it, s_quals->subexpressions) {
+ s_symbol *qualifier = SX_AS_SYMBOL(it.get());
+ if (qualifier == NULL) {
+ ir_read_error(expr, "qualifier list must contain only symbols");
+ return NULL;
+ }
+
+ // FINISHME: Check for duplicate/conflicting qualifiers.
+ if (strcmp(qualifier->value(), "centroid") == 0) {
+ var->centroid = 1;
+ } else if (strcmp(qualifier->value(), "invariant") == 0) {
+ var->invariant = 1;
+ } else if (strcmp(qualifier->value(), "uniform") == 0) {
+ var->mode = ir_var_uniform;
+ } else if (strcmp(qualifier->value(), "auto") == 0) {
+ var->mode = ir_var_auto;
+ } else if (strcmp(qualifier->value(), "in") == 0) {
+ var->mode = ir_var_in;
+ } else if (strcmp(qualifier->value(), "const_in") == 0) {
+ var->mode = ir_var_const_in;
+ } else if (strcmp(qualifier->value(), "out") == 0) {
+ var->mode = ir_var_out;
+ } else if (strcmp(qualifier->value(), "inout") == 0) {
+ var->mode = ir_var_inout;
+ } else if (strcmp(qualifier->value(), "smooth") == 0) {
+ var->interpolation = ir_var_smooth;
+ } else if (strcmp(qualifier->value(), "flat") == 0) {
+ var->interpolation = ir_var_flat;
+ } else if (strcmp(qualifier->value(), "noperspective") == 0) {
+ var->interpolation = ir_var_noperspective;
+ } else {
+ ir_read_error(expr, "unknown qualifier: %s", qualifier->value());
+ return NULL;
+ }
+ }
+
+ // Add the variable to the symbol table
+ state->symbols->add_variable(var);
+
+ return var;
+}
+
+
+ir_if *
+ir_reader::read_if(s_expression *expr, ir_loop *loop_ctx)
+{
+ s_expression *s_cond;
+ s_expression *s_then;
+ s_expression *s_else;
+
+ s_pattern pat[] = { "if", s_cond, s_then, s_else };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (if <condition> (<then>...) (<else>...))");
+ return NULL;
+ }
+
+ ir_rvalue *condition = read_rvalue(s_cond);
+ if (condition == NULL) {
+ ir_read_error(NULL, "when reading condition of (if ...)");
+ return NULL;
+ }
+
+ ir_if *iff = new(mem_ctx) ir_if(condition);
+
+ read_instructions(&iff->then_instructions, s_then, loop_ctx);
+ read_instructions(&iff->else_instructions, s_else, loop_ctx);
+ if (state->error) {
+ delete iff;
+ iff = NULL;
+ }
+ return iff;
+}
+
+
+ir_loop *
+ir_reader::read_loop(s_expression *expr)
+{
+ s_expression *s_counter, *s_from, *s_to, *s_inc, *s_body;
+
+ s_pattern pat[] = { "loop", s_counter, s_from, s_to, s_inc, s_body };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (loop <counter> <from> <to> "
+ "<increment> <body>)");
+ return NULL;
+ }
+
+ // FINISHME: actually read the count/from/to fields.
+
+ ir_loop *loop = new(mem_ctx) ir_loop;
+ read_instructions(&loop->body_instructions, s_body, loop);
+ if (state->error) {
+ delete loop;
+ loop = NULL;
+ }
+ return loop;
+}
+
+
+ir_return *
+ir_reader::read_return(s_expression *expr)
+{
+ s_expression *s_retval;
+
+ s_pattern return_value_pat[] = { "return", s_retval};
+ s_pattern return_void_pat[] = { "return" };
+ if (MATCH(expr, return_value_pat)) {
+ ir_rvalue *retval = read_rvalue(s_retval);
+ if (retval == NULL) {
+ ir_read_error(NULL, "when reading return value");
+ return NULL;
+ }
+ return new(mem_ctx) ir_return(retval);
+ } else if (MATCH(expr, return_void_pat)) {
+ return new(mem_ctx) ir_return;
+ } else {
+ ir_read_error(expr, "expected (return <rvalue>) or (return)");
+ return NULL;
+ }
+}
+
+
+ir_rvalue *
+ir_reader::read_rvalue(s_expression *expr)
+{
+ s_list *list = SX_AS_LIST(expr);
+ if (list == NULL || list->subexpressions.is_empty())
+ return NULL;
+
+ s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
+ if (tag == NULL) {
+ ir_read_error(expr, "expected rvalue tag");
+ return NULL;
+ }
+
+ ir_rvalue *rvalue = read_dereference(list);
+ if (rvalue != NULL || state->error)
+ return rvalue;
+ else if (strcmp(tag->value(), "swiz") == 0) {
+ rvalue = read_swizzle(list);
+ } else if (strcmp(tag->value(), "expression") == 0) {
+ rvalue = read_expression(list);
+ } else if (strcmp(tag->value(), "call") == 0) {
+ rvalue = read_call(list);
+ } else if (strcmp(tag->value(), "constant") == 0) {
+ rvalue = read_constant(list);
+ } else {
+ rvalue = read_texture(list);
+ if (rvalue == NULL && !state->error)
+ ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value());
+ }
+
+ return rvalue;
+}
+
+ir_assignment *
+ir_reader::read_assignment(s_expression *expr)
+{
+ s_expression *cond_expr = NULL;
+ s_expression *lhs_expr, *rhs_expr;
+ s_list *mask_list;
+
+ s_pattern pat4[] = { "assign", mask_list, lhs_expr, rhs_expr };
+ s_pattern pat5[] = { "assign", cond_expr, mask_list, lhs_expr, rhs_expr };
+ if (!MATCH(expr, pat4) && !MATCH(expr, pat5)) {
+ ir_read_error(expr, "expected (assign [<condition>] (<write mask>) "
+ "<lhs> <rhs>)");
+ return NULL;
+ }
+
+ ir_rvalue *condition = NULL;
+ if (cond_expr != NULL) {
+ condition = read_rvalue(cond_expr);
+ if (condition == NULL) {
+ ir_read_error(NULL, "when reading condition of assignment");
+ return NULL;
+ }
+ }
+
+ unsigned mask = 0;
+
+ s_symbol *mask_symbol;
+ s_pattern mask_pat[] = { mask_symbol };
+ if (MATCH(mask_list, mask_pat)) {
+ const char *mask_str = mask_symbol->value();
+ unsigned mask_length = strlen(mask_str);
+ if (mask_length > 4) {
+ ir_read_error(expr, "invalid write mask: %s", mask_str);
+ return NULL;
+ }
+
+ const unsigned idx_map[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
+
+ for (unsigned i = 0; i < mask_length; i++) {
+ if (mask_str[i] < 'w' || mask_str[i] > 'z') {
+ ir_read_error(expr, "write mask contains invalid character: %c",
+ mask_str[i]);
+ return NULL;
+ }
+ mask |= 1 << idx_map[mask_str[i] - 'w'];
+ }
+ } else if (!mask_list->subexpressions.is_empty()) {
+ ir_read_error(mask_list, "expected () or (<write mask>)");
+ return NULL;
+ }
+
+ ir_dereference *lhs = read_dereference(lhs_expr);
+ if (lhs == NULL) {
+ ir_read_error(NULL, "when reading left-hand side of assignment");
+ return NULL;
+ }
+
+ ir_rvalue *rhs = read_rvalue(rhs_expr);
+ if (rhs == NULL) {
+ ir_read_error(NULL, "when reading right-hand side of assignment");
+ return NULL;
+ }
+
+ if (mask == 0 && (lhs->type->is_vector() || lhs->type->is_scalar())) {
+ ir_read_error(expr, "non-zero write mask required.");
+ return NULL;
+ }
+
+ return new(mem_ctx) ir_assignment(lhs, rhs, condition, mask);
+}
+
+ir_call *
+ir_reader::read_call(s_expression *expr)
+{
+ s_symbol *name;
+ s_list *params;
+
+ s_pattern pat[] = { "call", name, params };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (call <name> (<param> ...))");
+ return NULL;
+ }
+
+ exec_list parameters;
+
+ foreach_iter(exec_list_iterator, it, params->subexpressions) {
+ s_expression *expr = (s_expression*) it.get();
+ ir_rvalue *param = read_rvalue(expr);
+ if (param == NULL) {
+ ir_read_error(expr, "when reading parameter to function call");
+ return NULL;
+ }
+ parameters.push_tail(param);
+ }
+
+ ir_function *f = state->symbols->get_function(name->value());
+ if (f == NULL) {
+ ir_read_error(expr, "found call to undefined function %s",
+ name->value());
+ return NULL;
+ }
+
+ ir_function_signature *callee = f->matching_signature(&parameters);
+ if (callee == NULL) {
+ ir_read_error(expr, "couldn't find matching signature for function "
+ "%s", name->value());
+ return NULL;
+ }
+
+ return new(mem_ctx) ir_call(callee, &parameters);
+}
+
+ir_expression *
+ir_reader::read_expression(s_expression *expr)
+{
+ s_expression *s_type;
+ s_symbol *s_op;
+ s_expression *s_arg1;
+
+ s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
+ if (!PARTIAL_MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (expression <type> <operator> "
+ "<operand> [<operand>])");
+ return NULL;
+ }
+ s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
+
+ const glsl_type *type = read_type(s_type);
+ if (type == NULL)
+ return NULL;
+
+ /* Read the operator */
+ ir_expression_operation op = ir_expression::get_operator(s_op->value());
+ if (op == (ir_expression_operation) -1) {
+ ir_read_error(expr, "invalid operator: %s", s_op->value());
+ return NULL;
+ }
+
+ unsigned num_operands = ir_expression::get_num_operands(op);
+ if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
+ ir_read_error(expr, "expected (expression <type> %s <operand>)",
+ s_op->value());
+ return NULL;
+ }
+
+ ir_rvalue *arg1 = read_rvalue(s_arg1);
+ ir_rvalue *arg2 = NULL;
+ if (arg1 == NULL) {
+ ir_read_error(NULL, "when reading first operand of %s", s_op->value());
+ return NULL;
+ }
+
+ if (num_operands == 2) {
+ if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
+ ir_read_error(expr, "expected (expression <type> %s <operand> "
+ "<operand>)", s_op->value());
+ return NULL;
+ }
+ arg2 = read_rvalue(s_arg2);
+ if (arg2 == NULL) {
+ ir_read_error(NULL, "when reading second operand of %s",
+ s_op->value());
+ return NULL;
+ }
+ }
+
+ return new(mem_ctx) ir_expression(op, type, arg1, arg2);
+}
+
+ir_swizzle *
+ir_reader::read_swizzle(s_expression *expr)
+{
+ s_symbol *swiz;
+ s_expression *sub;
+
+ s_pattern pat[] = { "swiz", swiz, sub };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (swiz <swizzle> <rvalue>)");
+ return NULL;
+ }
+
+ if (strlen(swiz->value()) > 4) {
+ ir_read_error(expr, "expected a valid swizzle; found %s", swiz->value());
+ return NULL;
+ }
+
+ ir_rvalue *rvalue = read_rvalue(sub);
+ if (rvalue == NULL)
+ return NULL;
+
+ ir_swizzle *ir = ir_swizzle::create(rvalue, swiz->value(),
+ rvalue->type->vector_elements);
+ if (ir == NULL)
+ ir_read_error(expr, "invalid swizzle");
+
+ return ir;
+}
+
+ir_constant *
+ir_reader::read_constant(s_expression *expr)
+{
+ s_expression *type_expr;
+ s_list *values;
+
+ s_pattern pat[] = { "constant", type_expr, values };
+ if (!MATCH(expr, pat)) {
+ ir_read_error(expr, "expected (constant <type> (...))");
+ return NULL;
+ }
+
+ const glsl_type *type = read_type(type_expr);
+ if (type == NULL)
+ return NULL;
+
+ if (values == NULL) {
+ ir_read_error(expr, "expected (constant <type> (...))");
+ return NULL;
+ }
+
+ if (type->is_array()) {
+ unsigned elements_supplied = 0;
+ exec_list elements;
+ foreach_iter(exec_list_iterator, it, values->subexpressions) {
+ s_expression *elt = (s_expression *) it.get();
+ ir_constant *ir_elt = read_constant(elt);
+ if (ir_elt == NULL)
+ return NULL;
+ elements.push_tail(ir_elt);
+ elements_supplied++;
+ }
+
+ if (elements_supplied != type->length) {
+ ir_read_error(values, "expected exactly %u array elements, "
+ "given %u", type->length, elements_supplied);
+ return NULL;
+ }
+ return new(mem_ctx) ir_constant(type, &elements);
+ }
+
+ const glsl_type *const base_type = type->get_base_type();
+
+ ir_constant_data data = { { 0 } };
+
+ // Read in list of values (at most 16).
+ int k = 0;
+ foreach_iter(exec_list_iterator, it, values->subexpressions) {
+ if (k >= 16) {
+ ir_read_error(values, "expected at most 16 numbers");
+ return NULL;
+ }
+
+ s_expression *expr = (s_expression*) it.get();
+
+ if (base_type->base_type == GLSL_TYPE_FLOAT) {
+ s_number *value = SX_AS_NUMBER(expr);
+ if (value == NULL) {
+ ir_read_error(values, "expected numbers");
+ return NULL;
+ }
+ data.f[k] = value->fvalue();
+ } else {
+ s_int *value = SX_AS_INT(expr);
+ if (value == NULL) {
+ ir_read_error(values, "expected integers");
+ return NULL;
+ }
+
+ switch (base_type->base_type) {
+ case GLSL_TYPE_UINT: {
+ data.u[k] = value->value();
+ break;
+ }
+ case GLSL_TYPE_INT: {
+ data.i[k] = value->value();
+ break;
+ }
+ case GLSL_TYPE_BOOL: {
+ data.b[k] = value->value();
+ break;
+ }
+ default:
+ ir_read_error(values, "unsupported constant type");
+ return NULL;
+ }
+ }
+ ++k;
+ }
+
+ return new(mem_ctx) ir_constant(type, &data);
+}
+
+ir_dereference *
+ir_reader::read_dereference(s_expression *expr)
+{
+ s_symbol *s_var;
+ s_expression *s_subject;
+ s_expression *s_index;
+ s_symbol *s_field;
+
+ s_pattern var_pat[] = { "var_ref", s_var };
+ s_pattern array_pat[] = { "array_ref", s_subject, s_index };
+ s_pattern record_pat[] = { "record_ref", s_subject, s_field };
+
+ if (MATCH(expr, var_pat)) {
+ ir_variable *var = state->symbols->get_variable(s_var->value());
+ if (var == NULL) {
+ ir_read_error(expr, "undeclared variable: %s", s_var->value());
+ return NULL;
+ }
+ return new(mem_ctx) ir_dereference_variable(var);
+ } else if (MATCH(expr, array_pat)) {
+ ir_rvalue *subject = read_rvalue(s_subject);
+ if (subject == NULL) {
+ ir_read_error(NULL, "when reading the subject of an array_ref");
+ return NULL;
+ }
+
+ ir_rvalue *idx = read_rvalue(s_index);
+ if (subject == NULL) {
+ ir_read_error(NULL, "when reading the index of an array_ref");
+ return NULL;
+ }
+ return new(mem_ctx) ir_dereference_array(subject, idx);
+ } else if (MATCH(expr, record_pat)) {
+ ir_rvalue *subject = read_rvalue(s_subject);
+ if (subject == NULL) {
+ ir_read_error(NULL, "when reading the subject of a record_ref");
+ return NULL;
+ }
+ return new(mem_ctx) ir_dereference_record(subject, s_field->value());
+ }
+ return NULL;
+}
+
+ir_texture *
+ir_reader::read_texture(s_expression *expr)
+{
+ s_symbol *tag = NULL;
+ s_expression *s_type = NULL;
+ s_expression *s_sampler = NULL;
+ s_expression *s_coord = NULL;
+ s_expression *s_offset = NULL;
+ s_expression *s_proj = NULL;
+ s_list *s_shadow = NULL;
+ s_expression *s_lod = NULL;
+
+ ir_texture_opcode op = ir_tex; /* silence warning */
+
+ s_pattern tex_pattern[] =
+ { "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };
+ s_pattern txf_pattern[] =
+ { "txf", s_type, s_sampler, s_coord, s_offset, s_lod };
+ s_pattern other_pattern[] =
+ { tag, s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow, s_lod };
+
+ if (MATCH(expr, tex_pattern)) {
+ op = ir_tex;
+ } else if (MATCH(expr, txf_pattern)) {
+ op = ir_txf;
+ } else if (MATCH(expr, other_pattern)) {
+ op = ir_texture::get_opcode(tag->value());
+ if (op == -1)
+ return NULL;
+ } else {
+ ir_read_error(NULL, "unexpected texture pattern");
+ return NULL;
+ }
+
+ ir_texture *tex = new(mem_ctx) ir_texture(op);
+
+ // Read return type
+ const glsl_type *type = read_type(s_type);
+ if (type == NULL) {
+ ir_read_error(NULL, "when reading type in (%s ...)",
+ tex->opcode_string());
+ return NULL;
+ }
+
+ // Read sampler (must be a deref)
+ ir_dereference *sampler = read_dereference(s_sampler);
+ if (sampler == NULL) {
+ ir_read_error(NULL, "when reading sampler in (%s ...)",
+ tex->opcode_string());
+ return NULL;
+ }
+ tex->set_sampler(sampler, type);
+
+ // Read coordinate (any rvalue)
+ tex->coordinate = read_rvalue(s_coord);
+ if (tex->coordinate == NULL) {
+ ir_read_error(NULL, "when reading coordinate in (%s ...)",
+ tex->opcode_string());
+ return NULL;
+ }
+
+ // Read texel offset - either 0 or an rvalue.
+ s_int *si_offset = SX_AS_INT(s_offset);
+ if (si_offset == NULL || si_offset->value() != 0) {
+ tex->offset = read_rvalue(s_offset);
+ if (tex->offset == NULL) {
+ ir_read_error(s_offset, "expected 0 or an expression");
+ return NULL;
+ }
+ }
+
+ if (op != ir_txf) {
+ s_int *proj_as_int = SX_AS_INT(s_proj);
+ if (proj_as_int && proj_as_int->value() == 1) {
+ tex->projector = NULL;
+ } else {
+ tex->projector = read_rvalue(s_proj);
+ if (tex->projector == NULL) {
+ ir_read_error(NULL, "when reading projective divide in (%s ..)",
+ tex->opcode_string());
+ return NULL;
+ }
+ }
+
+ if (s_shadow->subexpressions.is_empty()) {
+ tex->shadow_comparitor = NULL;
+ } else {
+ tex->shadow_comparitor = read_rvalue(s_shadow);
+ if (tex->shadow_comparitor == NULL) {
+ ir_read_error(NULL, "when reading shadow comparitor in (%s ..)",
+ tex->opcode_string());
+ return NULL;
+ }
+ }
+ }
+
+ switch (op) {
+ case ir_txb:
+ tex->lod_info.bias = read_rvalue(s_lod);
+ if (tex->lod_info.bias == NULL) {
+ ir_read_error(NULL, "when reading LOD bias in (txb ...)");
+ return NULL;
+ }
+ break;
+ case ir_txl:
+ case ir_txf:
+ tex->lod_info.lod = read_rvalue(s_lod);
+ if (tex->lod_info.lod == NULL) {
+ ir_read_error(NULL, "when reading LOD in (%s ...)",
+ tex->opcode_string());
+ return NULL;
+ }
+ break;
+ case ir_txd: {
+ s_expression *s_dx, *s_dy;
+ s_pattern dxdy_pat[] = { s_dx, s_dy };
+ if (!MATCH(s_lod, dxdy_pat)) {
+ ir_read_error(s_lod, "expected (dPdx dPdy) in (txd ...)");
+ return NULL;
+ }
+ tex->lod_info.grad.dPdx = read_rvalue(s_dx);
+ if (tex->lod_info.grad.dPdx == NULL) {
+ ir_read_error(NULL, "when reading dPdx in (txd ...)");
+ return NULL;
+ }
+ tex->lod_info.grad.dPdy = read_rvalue(s_dy);
+ if (tex->lod_info.grad.dPdy == NULL) {
+ ir_read_error(NULL, "when reading dPdy in (txd ...)");
+ return NULL;
+ }
+ break;
+ }
+ default:
+ // tex doesn't have any extra parameters.
+ break;
+ };
+ return tex;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 23:23:26 +0000