| 0,0 → 1,1137 |
|---|
| /* |
| * 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 <stdarg.h> |
| |
| #include "ir_reader.h" |
| #include "glsl_parser_extras.h" |
| #include "glsl_types.h" |
| #include "s_expression.h" |
| |
| const static bool debug = false; |
| |
| static void ir_read_error(_mesa_glsl_parse_state *, s_expression *, |
| const char *fmt, ...); |
| static const glsl_type *read_type(_mesa_glsl_parse_state *, s_expression *); |
| |
| static void scan_for_prototypes(_mesa_glsl_parse_state *, exec_list *, |
| s_expression *); |
| static ir_function *read_function(_mesa_glsl_parse_state *, s_list *, |
| bool skip_body); |
| static void read_function_sig(_mesa_glsl_parse_state *, ir_function *, |
| s_list *, bool skip_body); |
| |
| static void read_instructions(_mesa_glsl_parse_state *, exec_list *, |
| s_expression *, ir_loop *); |
| static ir_instruction *read_instruction(_mesa_glsl_parse_state *, |
| s_expression *, ir_loop *); |
| static ir_variable *read_declaration(_mesa_glsl_parse_state *, s_list *); |
| static ir_if *read_if(_mesa_glsl_parse_state *, s_list *, ir_loop *); |
| static ir_loop *read_loop(_mesa_glsl_parse_state *st, s_list *list); |
| static ir_return *read_return(_mesa_glsl_parse_state *, s_list *); |
| |
| static ir_rvalue *read_rvalue(_mesa_glsl_parse_state *, s_expression *); |
| static ir_assignment *read_assignment(_mesa_glsl_parse_state *, s_list *); |
| static ir_expression *read_expression(_mesa_glsl_parse_state *, s_list *); |
| static ir_call *read_call(_mesa_glsl_parse_state *, s_list *); |
| static ir_swizzle *read_swizzle(_mesa_glsl_parse_state *, s_list *); |
| static ir_constant *read_constant(_mesa_glsl_parse_state *, s_list *); |
| static ir_texture *read_texture(_mesa_glsl_parse_state *, s_list *); |
| |
| static ir_dereference *read_dereference(_mesa_glsl_parse_state *, |
| s_expression *); |
| static ir_dereference_variable * |
| read_var_ref(_mesa_glsl_parse_state *, s_list *); |
| static ir_dereference_array * |
| read_array_ref(_mesa_glsl_parse_state *, s_list *); |
| static ir_dereference_record * |
| read_record_ref(_mesa_glsl_parse_state *, s_list *); |
| |
| void |
| _mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions, |
| const char *src, bool scan_for_protos) |
| { |
| s_expression *expr = s_expression::read_expression(state, src); |
| if (expr == NULL) { |
| ir_read_error(state, NULL, "couldn't parse S-Expression."); |
| return; |
| } |
| |
| if (scan_for_protos) { |
| scan_for_prototypes(state, instructions, expr); |
| if (state->error) |
| return; |
| } |
| |
| read_instructions(state, instructions, expr, NULL); |
| ralloc_free(expr); |
| |
| if (debug) |
| validate_ir_tree(instructions); |
| } |
| |
| static void |
| ir_read_error(_mesa_glsl_parse_state *state, 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"); |
| } |
| } |
| |
| static const glsl_type * |
| read_type(_mesa_glsl_parse_state *st, s_expression *expr) |
| { |
| s_list *list = SX_AS_LIST(expr); |
| if (list != NULL) { |
| s_symbol *type_sym = SX_AS_SYMBOL(list->subexpressions.get_head()); |
| if (type_sym == NULL) { |
| ir_read_error(st, expr, "expected type (array ...) or (struct ...)"); |
| return NULL; |
| } |
| if (strcmp(type_sym->value(), "array") == 0) { |
| if (list->length() != 3) { |
| ir_read_error(st, expr, "expected type (array <type> <int>)"); |
| return NULL; |
| } |
| |
| // Read base type |
| s_expression *base_expr = (s_expression*) type_sym->next; |
| const glsl_type *base_type = read_type(st, base_expr); |
| if (base_type == NULL) { |
| ir_read_error(st, NULL, "when reading base type of array"); |
| return NULL; |
| } |
| |
| // Read array size |
| s_int *size = SX_AS_INT(base_expr->next); |
| if (size == NULL) { |
| ir_read_error(st, expr, "found non-integer array size"); |
| return NULL; |
| } |
| |
| return glsl_type::get_array_instance(base_type, size->value()); |
| } else if (strcmp(type_sym->value(), "struct") == 0) { |
| assert(false); // FINISHME |
| } else { |
| ir_read_error(st, expr, "expected (array ...) or (struct ...); " |
| "found (%s ...)", type_sym->value()); |
| return NULL; |
| } |
| } |
| |
| s_symbol *type_sym = SX_AS_SYMBOL(expr); |
| if (type_sym == NULL) { |
| ir_read_error(st, expr, "expected <type> (symbol or list)"); |
| return NULL; |
| } |
| |
| const glsl_type *type = st->symbols->get_type(type_sym->value()); |
| if (type == NULL) |
| ir_read_error(st, expr, "invalid type: %s", type_sym->value()); |
| |
| return type; |
| } |
| |
| |
| static void |
| scan_for_prototypes(_mesa_glsl_parse_state *st, exec_list *instructions, |
| s_expression *expr) |
| { |
| s_list *list = SX_AS_LIST(expr); |
| if (list == NULL) { |
| ir_read_error(st, 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(st, sub, true); |
| if (f == NULL) |
| return; |
| instructions->push_tail(f); |
| } |
| } |
| |
| static ir_function * |
| read_function(_mesa_glsl_parse_state *st, s_list *list, bool skip_body) |
| { |
| void *ctx = st; |
| bool added = false; |
| if (list->length() < 3) { |
| ir_read_error(st, list, "Expected (function <name> (signature ...) ...)"); |
| return NULL; |
| } |
| |
| s_symbol *name = SX_AS_SYMBOL(list->subexpressions.head->next); |
| if (name == NULL) { |
| ir_read_error(st, list, "Expected (function <name> ...)"); |
| return NULL; |
| } |
| |
| ir_function *f = st->symbols->get_function(name->value()); |
| if (f == NULL) { |
| f = new(ctx) ir_function(name->value()); |
| added = st->symbols->add_function(f); |
| assert(added); |
| } |
| |
| exec_list_iterator it = list->subexpressions.iterator(); |
| it.next(); // skip "function" tag |
| it.next(); // skip function name |
| for (/* nothing */; it.has_next(); it.next()) { |
| s_list *siglist = SX_AS_LIST(it.get()); |
| if (siglist == NULL) { |
| ir_read_error(st, list, "Expected (function (signature ...) ...)"); |
| return NULL; |
| } |
| |
| s_symbol *tag = SX_AS_SYMBOL(siglist->subexpressions.get_head()); |
| if (tag == NULL || strcmp(tag->value(), "signature") != 0) { |
| ir_read_error(st, siglist, "Expected (signature ...)"); |
| return NULL; |
| } |
| |
| read_function_sig(st, f, siglist, skip_body); |
| } |
| return added ? f : NULL; |
| } |
| |
| static void |
| read_function_sig(_mesa_glsl_parse_state *st, ir_function *f, s_list *list, |
| bool skip_body) |
| { |
| void *ctx = st; |
| if (list->length() != 4) { |
| ir_read_error(st, list, "Expected (signature <type> (parameters ...) " |
| "(<instruction> ...))"); |
| return; |
| } |
| |
| s_expression *type_expr = (s_expression*) list->subexpressions.head->next; |
| const glsl_type *return_type = read_type(st, type_expr); |
| if (return_type == NULL) |
| return; |
| |
| s_list *paramlist = SX_AS_LIST(type_expr->next); |
| s_list *body_list = SX_AS_LIST(type_expr->next->next); |
| if (paramlist == NULL || body_list == NULL) { |
| ir_read_error(st, list, "Expected (signature <type> (parameters ...) " |
| "(<instruction> ...))"); |
| return; |
| } |
| s_symbol *paramtag = SX_AS_SYMBOL(paramlist->subexpressions.get_head()); |
| if (paramtag == NULL || strcmp(paramtag->value(), "parameters") != 0) { |
| ir_read_error(st, paramlist, "Expected (parameters ...)"); |
| return; |
| } |
| |
| // Read the parameters list into a temporary place. |
| exec_list hir_parameters; |
| st->symbols->push_scope(); |
| |
| exec_list_iterator it = paramlist->subexpressions.iterator(); |
| for (it.next() /* skip "parameters" */; it.has_next(); it.next()) { |
| s_list *decl = SX_AS_LIST(it.get()); |
| ir_variable *var = read_declaration(st, decl); |
| 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(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(st, list, "function `%s' parameter `%s' qualifiers " |
| "don't match prototype", f->name, badvar); |
| return; |
| } |
| |
| if (sig->return_type != return_type) { |
| ir_read_error(st, list, "function `%s' return type doesn't " |
| "match prototype", f->name); |
| return; |
| } |
| } else { |
| /* No prototype for this body exists - skip it. */ |
| st->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(st, list, "function %s redefined", f->name); |
| return; |
| } |
| st->current_function = sig; |
| read_instructions(st, &sig->body, body_list, NULL); |
| st->current_function = NULL; |
| sig->is_defined = true; |
| } |
| |
| st->symbols->pop_scope(); |
| } |
| |
| static void |
| read_instructions(_mesa_glsl_parse_state *st, 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(st, 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(st, 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 (st->current_function == NULL && ir->as_variable() != NULL) |
| instructions->push_head(ir); |
| else |
| instructions->push_tail(ir); |
| } |
| } |
| } |
| |
| |
| static ir_instruction * |
| read_instruction(_mesa_glsl_parse_state *st, s_expression *expr, |
| ir_loop *loop_ctx) |
| { |
| void *ctx = st; |
| s_symbol *symbol = SX_AS_SYMBOL(expr); |
| if (symbol != NULL) { |
| if (strcmp(symbol->value(), "break") == 0 && loop_ctx != NULL) |
| return new(ctx) ir_loop_jump(ir_loop_jump::jump_break); |
| if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL) |
| return new(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(st, expr, "Invalid instruction.\n"); |
| return NULL; |
| } |
| |
| s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head()); |
| if (tag == NULL) { |
| ir_read_error(st, expr, "expected instruction tag"); |
| return NULL; |
| } |
| |
| ir_instruction *inst = NULL; |
| if (strcmp(tag->value(), "declare") == 0) { |
| inst = read_declaration(st, list); |
| } else if (strcmp(tag->value(), "assign") == 0) { |
| inst = read_assignment(st, list); |
| } else if (strcmp(tag->value(), "if") == 0) { |
| inst = read_if(st, list, loop_ctx); |
| } else if (strcmp(tag->value(), "loop") == 0) { |
| inst = read_loop(st, list); |
| } else if (strcmp(tag->value(), "return") == 0) { |
| inst = read_return(st, list); |
| } else if (strcmp(tag->value(), "function") == 0) { |
| inst = read_function(st, list, false); |
| } else { |
| inst = read_rvalue(st, list); |
| if (inst == NULL) |
| ir_read_error(st, NULL, "when reading instruction"); |
| } |
| return inst; |
| } |
| |
| |
| static ir_variable * |
| read_declaration(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 4) { |
| ir_read_error(st, list, "expected (declare (<qualifiers>) <type> " |
| "<name>)"); |
| return NULL; |
| } |
| |
| s_list *quals = SX_AS_LIST(list->subexpressions.head->next); |
| if (quals == NULL) { |
| ir_read_error(st, list, "expected a list of variable qualifiers"); |
| return NULL; |
| } |
| |
| s_expression *type_expr = (s_expression*) quals->next; |
| const glsl_type *type = read_type(st, type_expr); |
| if (type == NULL) |
| return NULL; |
| |
| s_symbol *var_name = SX_AS_SYMBOL(type_expr->next); |
| if (var_name == NULL) { |
| ir_read_error(st, list, "expected variable name, found non-symbol"); |
| return NULL; |
| } |
| |
| ir_variable *var = new(ctx) ir_variable(type, var_name->value(), |
| ir_var_auto); |
| |
| foreach_iter(exec_list_iterator, it, quals->subexpressions) { |
| s_symbol *qualifier = SX_AS_SYMBOL(it.get()); |
| if (qualifier == NULL) { |
| ir_read_error(st, list, "qualifier list must contain only symbols"); |
| delete var; |
| 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(), "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(st, list, "unknown qualifier: %s", qualifier->value()); |
| delete var; |
| return NULL; |
| } |
| } |
| |
| // Add the variable to the symbol table |
| st->symbols->add_variable(var); |
| |
| return var; |
| } |
| |
| |
| static ir_if * |
| read_if(_mesa_glsl_parse_state *st, s_list *list, ir_loop *loop_ctx) |
| { |
| void *ctx = st; |
| if (list->length() != 4) { |
| ir_read_error(st, list, "expected (if <condition> (<then> ...) " |
| "(<else> ...))"); |
| return NULL; |
| } |
| |
| s_expression *cond_expr = (s_expression*) list->subexpressions.head->next; |
| ir_rvalue *condition = read_rvalue(st, cond_expr); |
| if (condition == NULL) { |
| ir_read_error(st, NULL, "when reading condition of (if ...)"); |
| return NULL; |
| } |
| |
| s_expression *then_expr = (s_expression*) cond_expr->next; |
| s_expression *else_expr = (s_expression*) then_expr->next; |
| |
| ir_if *iff = new(ctx) ir_if(condition); |
| |
| read_instructions(st, &iff->then_instructions, then_expr, loop_ctx); |
| read_instructions(st, &iff->else_instructions, else_expr, loop_ctx); |
| if (st->error) { |
| delete iff; |
| iff = NULL; |
| } |
| return iff; |
| } |
| |
| |
| static ir_loop * |
| read_loop(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 6) { |
| ir_read_error(st, list, "expected (loop <counter> <from> <to> " |
| "<increment> <body>)"); |
| return NULL; |
| } |
| |
| s_expression *count_expr = (s_expression*) list->subexpressions.head->next; |
| s_expression *from_expr = (s_expression*) count_expr->next; |
| s_expression *to_expr = (s_expression*) from_expr->next; |
| s_expression *inc_expr = (s_expression*) to_expr->next; |
| s_expression *body_expr = (s_expression*) inc_expr->next; |
| |
| // FINISHME: actually read the count/from/to fields. |
| |
| ir_loop *loop = new(ctx) ir_loop; |
| read_instructions(st, &loop->body_instructions, body_expr, loop); |
| if (st->error) { |
| delete loop; |
| loop = NULL; |
| } |
| return loop; |
| } |
| |
| |
| static ir_return * |
| read_return(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 2) { |
| ir_read_error(st, list, "expected (return <rvalue>)"); |
| return NULL; |
| } |
| |
| s_expression *expr = (s_expression*) list->subexpressions.head->next; |
| |
| ir_rvalue *retval = read_rvalue(st, expr); |
| if (retval == NULL) { |
| ir_read_error(st, NULL, "when reading return value"); |
| return NULL; |
| } |
| |
| return new(ctx) ir_return(retval); |
| } |
| |
| |
| static ir_rvalue * |
| read_rvalue(_mesa_glsl_parse_state *st, 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(st, expr, "expected rvalue tag"); |
| return NULL; |
| } |
| |
| ir_rvalue *rvalue = read_dereference(st, list); |
| if (rvalue != NULL || st->error) |
| return rvalue; |
| else if (strcmp(tag->value(), "swiz") == 0) { |
| rvalue = read_swizzle(st, list); |
| } else if (strcmp(tag->value(), "expression") == 0) { |
| rvalue = read_expression(st, list); |
| } else if (strcmp(tag->value(), "call") == 0) { |
| rvalue = read_call(st, list); |
| } else if (strcmp(tag->value(), "constant") == 0) { |
| rvalue = read_constant(st, list); |
| } else { |
| rvalue = read_texture(st, list); |
| if (rvalue == NULL && !st->error) |
| ir_read_error(st, expr, "unrecognized rvalue tag: %s", tag->value()); |
| } |
| |
| return rvalue; |
| } |
| |
| static ir_assignment * |
| read_assignment(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 5) { |
| ir_read_error(st, list, "expected (assign <condition> (<write mask>) " |
| "<lhs> <rhs>)"); |
| return NULL; |
| } |
| |
| s_expression *cond_expr = (s_expression*) list->subexpressions.head->next; |
| s_list *mask_list = SX_AS_LIST(cond_expr->next); |
| s_expression *lhs_expr = (s_expression*) cond_expr->next->next; |
| s_expression *rhs_expr = (s_expression*) lhs_expr->next; |
| |
| ir_rvalue *condition = read_rvalue(st, cond_expr); |
| if (condition == NULL) { |
| ir_read_error(st, NULL, "when reading condition of assignment"); |
| return NULL; |
| } |
| |
| if (mask_list == NULL || mask_list->length() > 1) { |
| ir_read_error(st, mask_list, "expected () or (<write mask>)"); |
| return NULL; |
| } |
| |
| unsigned mask = 0; |
| if (mask_list->length() == 1) { |
| s_symbol *mask_symbol = SX_AS_SYMBOL(mask_list->subexpressions.head); |
| if (mask_symbol == NULL) { |
| ir_read_error(st, list, "expected a write mask; found non-symbol"); |
| return NULL; |
| } |
| |
| const char *mask_str = mask_symbol->value(); |
| unsigned mask_length = strlen(mask_str); |
| if (mask_length > 4) { |
| ir_read_error(st, list, "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(st, list, "write mask contains invalid character: %c", |
| mask_str[i]); |
| return NULL; |
| } |
| mask |= 1 << idx_map[mask_str[i] - 'w']; |
| } |
| } |
| |
| ir_dereference *lhs = read_dereference(st, lhs_expr); |
| if (lhs == NULL) { |
| ir_read_error(st, NULL, "when reading left-hand side of assignment"); |
| return NULL; |
| } |
| |
| ir_rvalue *rhs = read_rvalue(st, rhs_expr); |
| if (rhs == NULL) { |
| ir_read_error(st, NULL, "when reading right-hand side of assignment"); |
| return NULL; |
| } |
| |
| if (mask == 0 && (lhs->type->is_vector() || lhs->type->is_scalar())) { |
| ir_read_error(st, list, "non-zero write mask required."); |
| return NULL; |
| } |
| |
| return new(ctx) ir_assignment(lhs, rhs, condition, mask); |
| } |
| |
| static ir_call * |
| read_call(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 3) { |
| ir_read_error(st, list, "expected (call <name> (<param> ...))"); |
| return NULL; |
| } |
| |
| s_symbol *name = SX_AS_SYMBOL(list->subexpressions.head->next); |
| s_list *params = SX_AS_LIST(list->subexpressions.head->next->next); |
| if (name == NULL || params == NULL) { |
| ir_read_error(st, list, "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(st, expr); |
| if (param == NULL) { |
| ir_read_error(st, list, "when reading parameter to function call"); |
| return NULL; |
| } |
| parameters.push_tail(param); |
| } |
| |
| ir_function *f = st->symbols->get_function(name->value()); |
| if (f == NULL) { |
| ir_read_error(st, list, "found call to undefined function %s", |
| name->value()); |
| return NULL; |
| } |
| |
| ir_function_signature *callee = f->matching_signature(¶meters); |
| if (callee == NULL) { |
| ir_read_error(st, list, "couldn't find matching signature for function " |
| "%s", name->value()); |
| return NULL; |
| } |
| |
| return new(ctx) ir_call(callee, ¶meters); |
| } |
| |
| static ir_expression * |
| read_expression(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| const unsigned list_length = list->length(); |
| if (list_length < 4) { |
| ir_read_error(st, list, "expected (expression <type> <operator> " |
| "<operand> [<operand>])"); |
| return NULL; |
| } |
| |
| s_expression *type_expr = (s_expression*) list->subexpressions.head->next; |
| const glsl_type *type = read_type(st, type_expr); |
| if (type == NULL) |
| return NULL; |
| |
| /* Read the operator */ |
| s_symbol *op_sym = SX_AS_SYMBOL(type_expr->next); |
| if (op_sym == NULL) { |
| ir_read_error(st, list, "expected operator, found non-symbol"); |
| return NULL; |
| } |
| |
| ir_expression_operation op = ir_expression::get_operator(op_sym->value()); |
| if (op == (ir_expression_operation) -1) { |
| ir_read_error(st, list, "invalid operator: %s", op_sym->value()); |
| return NULL; |
| } |
| |
| /* Now that we know the operator, check for the right number of operands */ |
| if (ir_expression::get_num_operands(op) == 2) { |
| if (list_length != 5) { |
| ir_read_error(st, list, "expected (expression <type> %s <operand> " |
| " <operand>)", op_sym->value()); |
| return NULL; |
| } |
| } else { |
| if (list_length != 4) { |
| ir_read_error(st, list, "expected (expression <type> %s <operand>)", |
| op_sym->value()); |
| return NULL; |
| } |
| } |
| |
| s_expression *exp1 = (s_expression*) (op_sym->next); |
| ir_rvalue *arg1 = read_rvalue(st, exp1); |
| if (arg1 == NULL) { |
| ir_read_error(st, NULL, "when reading first operand of %s", |
| op_sym->value()); |
| return NULL; |
| } |
| |
| ir_rvalue *arg2 = NULL; |
| if (ir_expression::get_num_operands(op) == 2) { |
| s_expression *exp2 = (s_expression*) (exp1->next); |
| arg2 = read_rvalue(st, exp2); |
| if (arg2 == NULL) { |
| ir_read_error(st, NULL, "when reading second operand of %s", |
| op_sym->value()); |
| return NULL; |
| } |
| } |
| |
| return new(ctx) ir_expression(op, type, arg1, arg2); |
| } |
| |
| static ir_swizzle * |
| read_swizzle(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| if (list->length() != 3) { |
| ir_read_error(st, list, "expected (swiz <swizzle> <rvalue>)"); |
| return NULL; |
| } |
| |
| s_symbol *swiz = SX_AS_SYMBOL(list->subexpressions.head->next); |
| if (swiz == NULL) { |
| ir_read_error(st, list, "expected a valid swizzle; found non-symbol"); |
| return NULL; |
| } |
| |
| if (strlen(swiz->value()) > 4) { |
| ir_read_error(st, list, "expected a valid swizzle; found %s", |
| swiz->value()); |
| return NULL; |
| } |
| |
| s_expression *sub = (s_expression*) swiz->next; |
| ir_rvalue *rvalue = read_rvalue(st, 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(st, list, "invalid swizzle"); |
| |
| return ir; |
| } |
| |
| static ir_constant * |
| read_constant(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 3) { |
| ir_read_error(st, list, "expected (constant <type> (...))"); |
| return NULL; |
| } |
| |
| s_expression *type_expr = (s_expression*) list->subexpressions.head->next; |
| const glsl_type *type = read_type(st, type_expr); |
| if (type == NULL) |
| return NULL; |
| |
| s_list *values = SX_AS_LIST(type_expr->next); |
| if (values == NULL) { |
| ir_read_error(st, list, "expected (constant <type> (...))"); |
| return NULL; |
| } |
| |
| if (type->is_array()) { |
| const unsigned elements_supplied = values->length(); |
| if (elements_supplied != type->length) { |
| ir_read_error(st, values, "expected exactly %u array elements, " |
| "given %u", type->length, elements_supplied); |
| return NULL; |
| } |
| |
| exec_list elements; |
| foreach_iter(exec_list_iterator, it, values->subexpressions) { |
| s_expression *expr = (s_expression *) it.get(); |
| s_list *elt = SX_AS_LIST(expr); |
| if (elt == NULL) { |
| ir_read_error(st, expr, "expected (constant ...) array element"); |
| return NULL; |
| } |
| |
| ir_constant *ir_elt = read_constant(st, elt); |
| if (ir_elt == NULL) |
| return NULL; |
| elements.push_tail(ir_elt); |
| } |
| return new(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(st, 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(st, values, "expected numbers"); |
| return NULL; |
| } |
| data.f[k] = value->fvalue(); |
| } else { |
| s_int *value = SX_AS_INT(expr); |
| if (value == NULL) { |
| ir_read_error(st, 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(st, values, "unsupported constant type"); |
| return NULL; |
| } |
| } |
| ++k; |
| } |
| |
| return new(ctx) ir_constant(type, &data); |
| } |
| |
| static ir_dereference * |
| read_dereference(_mesa_glsl_parse_state *st, 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.head); |
| assert(tag != NULL); |
| |
| if (strcmp(tag->value(), "var_ref") == 0) |
| return read_var_ref(st, list); |
| if (strcmp(tag->value(), "array_ref") == 0) |
| return read_array_ref(st, list); |
| if (strcmp(tag->value(), "record_ref") == 0) |
| return read_record_ref(st, list); |
| return NULL; |
| } |
| |
| static ir_dereference_variable * |
| read_var_ref(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 2) { |
| ir_read_error(st, list, "expected (var_ref <variable name>)"); |
| return NULL; |
| } |
| s_symbol *var_name = SX_AS_SYMBOL(list->subexpressions.head->next); |
| if (var_name == NULL) { |
| ir_read_error(st, list, "expected (var_ref <variable name>)"); |
| return NULL; |
| } |
| |
| ir_variable *var = st->symbols->get_variable(var_name->value()); |
| if (var == NULL) { |
| ir_read_error(st, list, "undeclared variable: %s", var_name->value()); |
| return NULL; |
| } |
| |
| return new(ctx) ir_dereference_variable(var); |
| } |
| |
| static ir_dereference_array * |
| read_array_ref(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 3) { |
| ir_read_error(st, list, "expected (array_ref <rvalue> <index>)"); |
| return NULL; |
| } |
| |
| s_expression *subj_expr = (s_expression*) list->subexpressions.head->next; |
| ir_rvalue *subject = read_rvalue(st, subj_expr); |
| if (subject == NULL) { |
| ir_read_error(st, NULL, "when reading the subject of an array_ref"); |
| return NULL; |
| } |
| |
| s_expression *idx_expr = (s_expression*) subj_expr->next; |
| ir_rvalue *idx = read_rvalue(st, idx_expr); |
| return new(ctx) ir_dereference_array(subject, idx); |
| } |
| |
| static ir_dereference_record * |
| read_record_ref(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| if (list->length() != 3) { |
| ir_read_error(st, list, "expected (record_ref <rvalue> <field>)"); |
| return NULL; |
| } |
| |
| s_expression *subj_expr = (s_expression*) list->subexpressions.head->next; |
| ir_rvalue *subject = read_rvalue(st, subj_expr); |
| if (subject == NULL) { |
| ir_read_error(st, NULL, "when reading the subject of a record_ref"); |
| return NULL; |
| } |
| |
| s_symbol *field = SX_AS_SYMBOL(subj_expr->next); |
| if (field == NULL) { |
| ir_read_error(st, list, "expected (record_ref ... <field name>)"); |
| return NULL; |
| } |
| return new(ctx) ir_dereference_record(subject, field->value()); |
| } |
| |
| static bool |
| valid_texture_list_length(ir_texture_opcode op, s_list *list) |
| { |
| unsigned required_length = 7; |
| if (op == ir_txf) |
| required_length = 5; |
| else if (op == ir_tex) |
| required_length = 6; |
| |
| return list->length() == required_length; |
| } |
| |
| static ir_texture * |
| read_texture(_mesa_glsl_parse_state *st, s_list *list) |
| { |
| void *ctx = st; |
| s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.head); |
| assert(tag != NULL); |
| |
| ir_texture_opcode op = ir_texture::get_opcode(tag->value()); |
| if (op == (ir_texture_opcode) -1) |
| return NULL; |
| |
| if (!valid_texture_list_length(op, list)) { |
| ir_read_error(st, NULL, "invalid list size in (%s ...)", tag->value()); |
| return NULL; |
| } |
| |
| ir_texture *tex = new(ctx) ir_texture(op); |
| |
| // Read sampler (must be a deref) |
| s_expression *sampler_expr = (s_expression *) tag->next; |
| ir_dereference *sampler = read_dereference(st, sampler_expr); |
| if (sampler == NULL) { |
| ir_read_error(st, NULL, "when reading sampler in (%s ...)", tag->value()); |
| return NULL; |
| } |
| tex->set_sampler(sampler); |
| |
| // Read coordinate (any rvalue) |
| s_expression *coordinate_expr = (s_expression *) sampler_expr->next; |
| tex->coordinate = read_rvalue(st, coordinate_expr); |
| if (tex->coordinate == NULL) { |
| ir_read_error(st, NULL, "when reading coordinate in (%s ...)", |
| tag->value()); |
| return NULL; |
| } |
| |
| // Read texel offset, i.e. (0 0 0) |
| s_list *offset_list = SX_AS_LIST(coordinate_expr->next); |
| if (offset_list == NULL || offset_list->length() != 3) { |
| ir_read_error(st, offset_list, "expected (<int> <int> <int>)"); |
| return NULL; |
| } |
| s_int *offset_x = SX_AS_INT(offset_list->subexpressions.head); |
| s_int *offset_y = SX_AS_INT(offset_list->subexpressions.head->next); |
| s_int *offset_z = SX_AS_INT(offset_list->subexpressions.head->next->next); |
| if (offset_x == NULL || offset_y == NULL || offset_z == NULL) { |
| ir_read_error(st, offset_list, "expected (<int> <int> <int>)"); |
| return NULL; |
| } |
| tex->offsets[0] = offset_x->value(); |
| tex->offsets[1] = offset_y->value(); |
| tex->offsets[2] = offset_z->value(); |
| |
| if (op == ir_txf) { |
| s_expression *lod_expr = (s_expression *) offset_list->next; |
| tex->lod_info.lod = read_rvalue(st, lod_expr); |
| if (tex->lod_info.lod == NULL) { |
| ir_read_error(st, NULL, "when reading LOD in (txf ...)"); |
| return NULL; |
| } |
| } else { |
| s_expression *proj_expr = (s_expression *) offset_list->next; |
| s_int *proj_as_int = SX_AS_INT(proj_expr); |
| if (proj_as_int && proj_as_int->value() == 1) { |
| tex->projector = NULL; |
| } else { |
| tex->projector = read_rvalue(st, proj_expr); |
| if (tex->projector == NULL) { |
| ir_read_error(st, NULL, "when reading projective divide in (%s ..)", |
| tag->value()); |
| return NULL; |
| } |
| } |
| |
| s_list *shadow_list = SX_AS_LIST(proj_expr->next); |
| if (shadow_list == NULL) { |
| ir_read_error(st, NULL, "shadow comparitor must be a list"); |
| return NULL; |
| } |
| if (shadow_list->subexpressions.is_empty()) { |
| tex->shadow_comparitor= NULL; |
| } else { |
| tex->shadow_comparitor = read_rvalue(st, shadow_list); |
| if (tex->shadow_comparitor == NULL) { |
| ir_read_error(st, NULL, "when reading shadow comparitor in (%s ..)", |
| tag->value()); |
| return NULL; |
| } |
| } |
| s_expression *lod_expr = (s_expression *) shadow_list->next; |
| |
| switch (op) { |
| case ir_txb: |
| tex->lod_info.bias = read_rvalue(st, lod_expr); |
| if (tex->lod_info.bias == NULL) { |
| ir_read_error(st, NULL, "when reading LOD bias in (txb ...)"); |
| return NULL; |
| } |
| break; |
| case ir_txl: |
| tex->lod_info.lod = read_rvalue(st, lod_expr); |
| if (tex->lod_info.lod == NULL) { |
| ir_read_error(st, NULL, "when reading LOD in (txl ...)"); |
| return NULL; |
| } |
| break; |
| case ir_txd: { |
| s_list *lod_list = SX_AS_LIST(lod_expr); |
| if (lod_list->length() != 2) { |
| ir_read_error(st, lod_expr, "expected (dPdx dPdy) in (txd ...)"); |
| return NULL; |
| } |
| s_expression *dx_expr = (s_expression *) lod_list->subexpressions.head; |
| s_expression *dy_expr = (s_expression *) dx_expr->next; |
| |
| tex->lod_info.grad.dPdx = read_rvalue(st, dx_expr); |
| if (tex->lod_info.grad.dPdx == NULL) { |
| ir_read_error(st, NULL, "when reading dPdx in (txd ...)"); |
| return NULL; |
| } |
| tex->lod_info.grad.dPdy = read_rvalue(st, dy_expr); |
| if (tex->lod_info.grad.dPdy == NULL) { |
| ir_read_error(st, NULL, "when reading dPdy in (txd ...)"); |
| return NULL; |
| } |
| break; |
| } |
| default: |
| // tex doesn't have any extra parameters and txf was handled earlier. |
| break; |
| }; |
| } |
| return tex; |
| } |