diff options
Diffstat (limited to 'src/glsl/ir_reader.cpp')
| -rw-r--r-- | src/glsl/ir_reader.cpp | 997 |
1 files changed, 427 insertions, 570 deletions
diff --git a/src/glsl/ir_reader.cpp b/src/glsl/ir_reader.cpp index 5a718d3b756..40901dc6c92 100644 --- a/src/glsl/ir_reader.cpp +++ b/src/glsl/ir_reader.cpp @@ -21,8 +21,6 @@ * DEALINGS IN THE SOFTWARE. */ -#include <cstdarg> - extern "C" { #include <talloc.h> } @@ -34,69 +32,78 @@ extern "C" { 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 *); +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) { - s_expression *expr = s_expression::read_expression(state, src); + 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(state, NULL, "couldn't parse S-Expression."); + ir_read_error(NULL, "couldn't parse S-Expression."); return; } if (scan_for_protos) { - scan_for_prototypes(state, instructions, expr); + scan_for_prototypes(instructions, expr); if (state->error) return; } - read_instructions(state, instructions, expr, NULL); + read_instructions(instructions, expr, NULL); talloc_free(expr); if (debug) validate_ir_tree(instructions); } -static void -ir_read_error(_mesa_glsl_parse_state *state, s_expression *expr, - const char *fmt, ...) +void +ir_reader::ir_read_error(s_expression *expr, const char *fmt, ...) { va_list ap; @@ -121,68 +128,43 @@ ir_read_error(_mesa_glsl_parse_state *state, s_expression *expr, } } -static const glsl_type * -read_type(_mesa_glsl_parse_state *st, s_expression *expr) +const glsl_type * +ir_reader::read_type(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 ...)"); + 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; } - 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; - } + 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(st, expr, "expected <type> (symbol or list)"); + ir_read_error(expr, "expected <type>"); return NULL; } - const glsl_type *type = st->symbols->get_type(type_sym->value()); + const glsl_type *type = state->symbols->get_type(type_sym->value()); if (type == NULL) - ir_read_error(st, expr, "invalid type: %s", type_sym->value()); + ir_read_error(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) +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(st, expr, "Expected (<instruction> ...); found an atom."); + ir_read_error(expr, "Expected (<instruction> ...); found an atom."); return; } @@ -195,94 +177,73 @@ scan_for_prototypes(_mesa_glsl_parse_state *st, exec_list *instructions, if (tag == NULL || strcmp(tag->value(), "function") != 0) continue; // not a (function ...); ignore it. - ir_function *f = read_function(st, sub, true); + ir_function *f = read_function(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) +ir_function * +ir_reader::read_function(s_expression *expr, 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; - s_symbol *name = SX_AS_SYMBOL(list->subexpressions.head->next); - if (name == NULL) { - ir_read_error(st, list, "Expected (function <name> ...)"); + s_pattern pat[] = { "function", name }; + if (!PARTIAL_MATCH(expr, pat)) { + ir_read_error(expr, "Expected (function <name> (signature ...) ...)"); return NULL; } - ir_function *f = st->symbols->get_function(name->value()); + ir_function *f = state->symbols->get_function(name->value()); if (f == NULL) { - f = new(ctx) ir_function(name->value()); - added = st->symbols->add_function(f); + f = new(mem_ctx) ir_function(name->value()); + added = state->symbols->add_function(f); assert(added); } - exec_list_iterator it = list->subexpressions.iterator(); + 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_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); + s_expression *s_sig = (s_expression *) it.get(); + read_function_sig(f, s_sig, 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 +ir_reader::read_function_sig(ir_function *f, s_expression *expr, bool skip_body) { - void *ctx = st; - if (list->length() != 4) { - ir_read_error(st, list, "Expected (signature <type> (parameters ...) " - "(<instruction> ...))"); + 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; } - s_expression *type_expr = (s_expression*) list->subexpressions.head->next; - const glsl_type *return_type = read_type(st, type_expr); + const glsl_type *return_type = read_type(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 ...)"); + ir_read_error(paramlist, "Expected (parameters ...)"); return; } // Read the parameters list into a temporary place. exec_list hir_parameters; - st->symbols->push_scope(); + state->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); + ir_variable *var = read_declaration((s_expression *) it.get()); if (var == NULL) return; @@ -292,25 +253,25 @@ read_function_sig(_mesa_glsl_parse_state *st, ir_function *f, s_list *list, 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 = 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(st, list, "function `%s' parameter `%s' qualifiers " + 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(st, list, "function `%s' return type doesn't " + ir_read_error(expr, "function `%s' return type doesn't " "match prototype", f->name); return; } } else { /* No prototype for this body exists - skip it. */ - st->symbols->pop_scope(); + state->symbols->pop_scope(); return; } assert(sig != NULL); @@ -319,39 +280,39 @@ read_function_sig(_mesa_glsl_parse_state *st, ir_function *f, s_list *list, if (!skip_body && !body_list->subexpressions.is_empty()) { if (sig->is_defined) { - ir_read_error(st, list, "function %s redefined", f->name); + ir_read_error(expr, "function %s redefined", f->name); return; } - st->current_function = sig; - read_instructions(st, &sig->body, body_list, NULL); - st->current_function = NULL; + state->current_function = sig; + read_instructions(&sig->body, body_list, NULL); + state->current_function = NULL; sig->is_defined = true; } - st->symbols->pop_scope(); + state->symbols->pop_scope(); } -static void -read_instructions(_mesa_glsl_parse_state *st, exec_list *instructions, - s_expression *expr, ir_loop *loop_ctx) +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(st, expr, "Expected (<instruction> ...); found an atom."); + 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(st, sub, loop_ctx); + 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 (st->current_function == NULL && ir->as_variable() != NULL) + if (state->current_function == NULL && ir->as_variable() != NULL) instructions->push_head(ir); else instructions->push_tail(ir); @@ -360,88 +321,74 @@ read_instructions(_mesa_glsl_parse_state *st, exec_list *instructions, } -static ir_instruction * -read_instruction(_mesa_glsl_parse_state *st, s_expression *expr, - ir_loop *loop_ctx) +ir_instruction * +ir_reader::read_instruction(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); + return new(mem_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); + 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(st, expr, "Invalid instruction.\n"); + 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(st, expr, "expected instruction tag"); + ir_read_error(expr, "expected instruction tag"); return NULL; } ir_instruction *inst = NULL; if (strcmp(tag->value(), "declare") == 0) { - inst = read_declaration(st, list); + inst = read_declaration(list); } else if (strcmp(tag->value(), "assign") == 0) { - inst = read_assignment(st, list); + inst = read_assignment(list); } else if (strcmp(tag->value(), "if") == 0) { - inst = read_if(st, list, loop_ctx); + inst = read_if(list, loop_ctx); } else if (strcmp(tag->value(), "loop") == 0) { - inst = read_loop(st, list); + inst = read_loop(list); } else if (strcmp(tag->value(), "return") == 0) { - inst = read_return(st, list); + inst = read_return(list); } else if (strcmp(tag->value(), "function") == 0) { - inst = read_function(st, list, false); + inst = read_function(list, false); } else { - inst = read_rvalue(st, list); + inst = read_rvalue(list); if (inst == NULL) - ir_read_error(st, NULL, "when reading instruction"); + ir_read_error(NULL, "when reading instruction"); } return inst; } - -static ir_variable * -read_declaration(_mesa_glsl_parse_state *st, s_list *list) +ir_variable * +ir_reader::read_declaration(s_expression *expr) { - void *ctx = st; - if (list->length() != 4) { - ir_read_error(st, list, "expected (declare (<qualifiers>) <type> " - "<name>)"); - return NULL; - } + s_list *s_quals; + s_expression *s_type; + s_symbol *s_name; - s_list *quals = SX_AS_LIST(list->subexpressions.head->next); - if (quals == NULL) { - ir_read_error(st, list, "expected a list of variable qualifiers"); + 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; } - s_expression *type_expr = (s_expression*) quals->next; - const glsl_type *type = read_type(st, type_expr); + const glsl_type *type = read_type(s_type); 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); + ir_variable *var = new(mem_ctx) ir_variable(type, s_name->value(), + ir_var_auto); - foreach_iter(exec_list_iterator, it, quals->subexpressions) { + foreach_iter(exec_list_iterator, it, s_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; + ir_read_error(expr, "qualifier list must contain only symbols"); return NULL; } @@ -467,44 +414,42 @@ read_declaration(_mesa_glsl_parse_state *st, s_list *list) } 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; + ir_read_error(expr, "unknown qualifier: %s", qualifier->value()); return NULL; } } // Add the variable to the symbol table - st->symbols->add_variable(var); + state->symbols->add_variable(var); return var; } -static ir_if * -read_if(_mesa_glsl_parse_state *st, s_list *list, ir_loop *loop_ctx) +ir_if * +ir_reader::read_if(s_expression *expr, ir_loop *loop_ctx) { - void *ctx = st; - if (list->length() != 4) { - ir_read_error(st, list, "expected (if <condition> (<then> ...) " - "(<else> ...))"); + 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; } - s_expression *cond_expr = (s_expression*) list->subexpressions.head->next; - ir_rvalue *condition = read_rvalue(st, cond_expr); + ir_rvalue *condition = read_rvalue(s_cond); if (condition == NULL) { - ir_read_error(st, NULL, "when reading condition of (if ...)"); + ir_read_error(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(mem_ctx) ir_if(condition); - 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) { + 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; } @@ -512,27 +457,23 @@ read_if(_mesa_glsl_parse_state *st, s_list *list, ir_loop *loop_ctx) } -static ir_loop * -read_loop(_mesa_glsl_parse_state *st, s_list *list) +ir_loop * +ir_reader::read_loop(s_expression *expr) { - void *ctx = st; - if (list->length() != 6) { - ir_read_error(st, list, "expected (loop <counter> <from> <to> " - "<increment> <body>)"); + 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; } - 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) { + ir_loop *loop = new(mem_ctx) ir_loop; + read_instructions(&loop->body_instructions, s_body, loop); + if (state->error) { delete loop; loop = NULL; } @@ -540,29 +481,29 @@ read_loop(_mesa_glsl_parse_state *st, s_list *list) } -static ir_return * -read_return(_mesa_glsl_parse_state *st, s_list *list) +ir_return * +ir_reader::read_return(s_expression *expr) { - void *ctx = st; - if (list->length() != 2) { - ir_read_error(st, list, "expected (return <rvalue>)"); + s_expression *s_retval; + + s_pattern pat[] = { "return", s_retval}; + if (!MATCH(expr, pat)) { + ir_read_error(expr, "expected (return <rvalue>)"); return NULL; } - s_expression *expr = (s_expression*) list->subexpressions.head->next; - - ir_rvalue *retval = read_rvalue(st, expr); + ir_rvalue *retval = read_rvalue(s_retval); if (retval == NULL) { - ir_read_error(st, NULL, "when reading return value"); + ir_read_error(NULL, "when reading return value"); return NULL; } - return new(ctx) ir_return(retval); + return new(mem_ctx) ir_return(retval); } -static ir_rvalue * -read_rvalue(_mesa_glsl_parse_state *st, s_expression *expr) +ir_rvalue * +ir_reader::read_rvalue(s_expression *expr) { s_list *list = SX_AS_LIST(expr); if (list == NULL || list->subexpressions.is_empty()) @@ -570,68 +511,63 @@ read_rvalue(_mesa_glsl_parse_state *st, s_expression *expr) s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head()); if (tag == NULL) { - ir_read_error(st, expr, "expected rvalue tag"); + ir_read_error(expr, "expected rvalue tag"); return NULL; } - ir_rvalue *rvalue = read_dereference(st, list); - if (rvalue != NULL || st->error) + ir_rvalue *rvalue = read_dereference(list); + if (rvalue != NULL || state->error) return rvalue; else if (strcmp(tag->value(), "swiz") == 0) { - rvalue = read_swizzle(st, list); + rvalue = read_swizzle(list); } else if (strcmp(tag->value(), "expression") == 0) { - rvalue = read_expression(st, list); + rvalue = read_expression(list); } else if (strcmp(tag->value(), "call") == 0) { - rvalue = read_call(st, list); + rvalue = read_call(list); } else if (strcmp(tag->value(), "constant") == 0) { - rvalue = read_constant(st, list); + rvalue = read_constant(list); } else { - rvalue = read_texture(st, list); - if (rvalue == NULL && !st->error) - ir_read_error(st, expr, "unrecognized rvalue tag: %s", tag->value()); + rvalue = read_texture(list); + if (rvalue == NULL && !state->error) + ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value()); } return rvalue; } -static ir_assignment * -read_assignment(_mesa_glsl_parse_state *st, s_list *list) +ir_assignment * +ir_reader::read_assignment(s_expression *expr) { - 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; + s_expression *cond_expr = NULL; + s_expression *lhs_expr, *rhs_expr; + s_list *mask_list; - ir_rvalue *condition = read_rvalue(st, cond_expr); - if (condition == NULL) { - ir_read_error(st, NULL, "when reading condition of assignment"); + 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; } - if (mask_list == NULL || mask_list->length() > 1) { - ir_read_error(st, mask_list, "expected () or (<write mask>)"); - 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; - 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; - } + 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(st, list, "invalid write mask: %s", mask_str); + ir_read_error(expr, "invalid write mask: %s", mask_str); return NULL; } @@ -639,47 +575,46 @@ read_assignment(_mesa_glsl_parse_state *st, s_list *list) 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", + 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(st, lhs_expr); + ir_dereference *lhs = read_dereference(lhs_expr); if (lhs == NULL) { - ir_read_error(st, NULL, "when reading left-hand side of assignment"); + ir_read_error(NULL, "when reading left-hand side of assignment"); return NULL; } - ir_rvalue *rhs = read_rvalue(st, rhs_expr); + ir_rvalue *rhs = read_rvalue(rhs_expr); if (rhs == NULL) { - ir_read_error(st, NULL, "when reading right-hand side of assignment"); + 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(st, list, "non-zero write mask required."); + ir_read_error(expr, "non-zero write mask required."); return NULL; } - return new(ctx) ir_assignment(lhs, rhs, condition, mask); + return new(mem_ctx) ir_assignment(lhs, rhs, condition, mask); } -static ir_call * -read_call(_mesa_glsl_parse_state *st, s_list *list) +ir_call * +ir_reader::read_call(s_expression *expr) { - void *ctx = st; - if (list->length() != 3) { - ir_read_error(st, list, "expected (call <name> (<param> ...))"); - return NULL; - } + s_symbol *name; + s_list *params; - 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> ...))"); + s_pattern pat[] = { "call", name, params }; + if (!MATCH(expr, pat)) { + ir_read_error(expr, "expected (call <name> (<param> ...))"); return NULL; } @@ -687,173 +622,156 @@ read_call(_mesa_glsl_parse_state *st, s_list *list) foreach_iter(exec_list_iterator, it, params->subexpressions) { s_expression *expr = (s_expression*) it.get(); - ir_rvalue *param = read_rvalue(st, expr); + ir_rvalue *param = read_rvalue(expr); if (param == NULL) { - ir_read_error(st, list, "when reading parameter to function call"); + ir_read_error(expr, "when reading parameter to function call"); return NULL; } parameters.push_tail(param); } - ir_function *f = st->symbols->get_function(name->value()); + ir_function *f = state->symbols->get_function(name->value()); if (f == NULL) { - ir_read_error(st, list, "found call to undefined function %s", + ir_read_error(expr, "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 " + ir_read_error(expr, "couldn't find matching signature for function " "%s", name->value()); return NULL; } - return new(ctx) ir_call(callee, ¶meters); + return new(mem_ctx) ir_call(callee, ¶meters); } -static ir_expression * -read_expression(_mesa_glsl_parse_state *st, s_list *list) +ir_expression * +ir_reader::read_expression(s_expression *expr) { - void *ctx = st; - const unsigned list_length = list->length(); - if (list_length < 4) { - ir_read_error(st, list, "expected (expression <type> <operator> " - "<operand> [<operand>])"); + 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 - s_expression *type_expr = (s_expression*) list->subexpressions.head->next; - const glsl_type *type = read_type(st, type_expr); + const glsl_type *type = read_type(s_type); 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()); + ir_expression_operation op = ir_expression::get_operator(s_op->value()); if (op == (ir_expression_operation) -1) { - ir_read_error(st, list, "invalid operator: %s", op_sym->value()); + ir_read_error(expr, "invalid operator: %s", s_op->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; - } + 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; } - s_expression *exp1 = (s_expression*) (op_sym->next); - ir_rvalue *arg1 = read_rvalue(st, exp1); + ir_rvalue *arg1 = read_rvalue(s_arg1); + ir_rvalue *arg2 = NULL; if (arg1 == NULL) { - ir_read_error(st, NULL, "when reading first operand of %s", - op_sym->value()); + ir_read_error(NULL, "when reading first operand of %s", s_op->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 (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(st, NULL, "when reading second operand of %s", - op_sym->value()); + ir_read_error(NULL, "when reading second operand of %s", + s_op->value()); return NULL; } } - return new(ctx) ir_expression(op, type, arg1, arg2); + return new(mem_ctx) ir_expression(op, type, arg1, arg2); } -static ir_swizzle * -read_swizzle(_mesa_glsl_parse_state *st, s_list *list) +ir_swizzle * +ir_reader::read_swizzle(s_expression *expr) { - if (list->length() != 3) { - ir_read_error(st, list, "expected (swiz <swizzle> <rvalue>)"); - return NULL; - } + s_symbol *swiz; + s_expression *sub; - 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"); + 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(st, list, "expected a valid swizzle; found %s", - swiz->value()); + ir_read_error(expr, "expected a valid swizzle; found %s", swiz->value()); return NULL; } - s_expression *sub = (s_expression*) swiz->next; - ir_rvalue *rvalue = read_rvalue(st, sub); + 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(st, list, "invalid swizzle"); + ir_read_error(expr, "invalid swizzle"); return ir; } -static ir_constant * -read_constant(_mesa_glsl_parse_state *st, s_list *list) +ir_constant * +ir_reader::read_constant(s_expression *expr) { - void *ctx = st; - if (list->length() != 3) { - ir_read_error(st, list, "expected (constant <type> (...))"); + 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; } - s_expression *type_expr = (s_expression*) list->subexpressions.head->next; - const glsl_type *type = read_type(st, type_expr); + const glsl_type *type = read_type(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> (...))"); + ir_read_error(expr, "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; - } - + unsigned elements_supplied = 0; 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); + 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(ctx) ir_constant(type, &elements); + return new(mem_ctx) ir_constant(type, &elements); } const glsl_type *const base_type = type->get_base_type(); @@ -864,7 +782,7 @@ read_constant(_mesa_glsl_parse_state *st, s_list *list) int k = 0; foreach_iter(exec_list_iterator, it, values->subexpressions) { if (k >= 16) { - ir_read_error(st, values, "expected at most 16 numbers"); + ir_read_error(values, "expected at most 16 numbers"); return NULL; } @@ -873,14 +791,14 @@ read_constant(_mesa_glsl_parse_state *st, s_list *list) 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"); + 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(st, values, "expected integers"); + ir_read_error(values, "expected integers"); return NULL; } @@ -898,246 +816,185 @@ read_constant(_mesa_glsl_parse_state *st, s_list *list) break; } default: - ir_read_error(st, values, "unsupported constant type"); + ir_read_error(values, "unsupported constant type"); return NULL; } } ++k; } - return new(ctx) ir_constant(type, &data); + return new(mem_ctx) ir_constant(type, &data); } -static ir_dereference * -read_dereference(_mesa_glsl_parse_state *st, s_expression *expr) +ir_dereference * +ir_reader::read_dereference(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 *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; + } - s_symbol *field = SX_AS_SYMBOL(subj_expr->next); - if (field == NULL) { - ir_read_error(st, list, "expected (record_ref ... <field name>)"); - 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 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; + return NULL; } -static ir_texture * -read_texture(_mesa_glsl_parse_state *st, s_list *list) +ir_texture * +ir_reader::read_texture(s_expression *expr) { - 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; + s_symbol *tag = NULL; + s_expression *s_sampler = NULL; + s_expression *s_coord = NULL; + s_list *s_offset = NULL; + s_expression *s_proj = NULL; + s_list *s_shadow = NULL; + s_expression *s_lod = NULL; + + ir_texture_opcode op; + + s_pattern tex_pattern[] = + { "tex", s_sampler, s_coord, s_offset, s_proj, s_shadow }; + s_pattern txf_pattern[] = + { "txf", s_sampler, s_coord, s_offset, s_lod }; + s_pattern other_pattern[] = + { tag, 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; } - ir_texture *tex = new(ctx) ir_texture(op); + ir_texture *tex = new(mem_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); + ir_dereference *sampler = read_dereference(s_sampler); if (sampler == NULL) { - ir_read_error(st, NULL, "when reading sampler in (%s ...)", tag->value()); + ir_read_error(NULL, "when reading sampler in (%s ...)", + tex->opcode_string()); 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); + tex->coordinate = read_rvalue(s_coord); if (tex->coordinate == NULL) { - ir_read_error(st, NULL, "when reading coordinate in (%s ...)", - tag->value()); + ir_read_error(NULL, "when reading coordinate in (%s ...)", + tex->opcode_string()); 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>)"); + s_int *offset_x; + s_int *offset_y; + s_int *offset_z; + s_pattern offset_pat[] = { offset_x, offset_y, offset_z }; + if (!MATCH(s_offset, offset_pat)) { + ir_read_error(s_offset, "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 (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(st, proj_expr); + tex->projector = read_rvalue(s_proj); if (tex->projector == NULL) { - ir_read_error(st, NULL, "when reading projective divide in (%s ..)", - tag->value()); + ir_read_error(NULL, "when reading projective divide in (%s ..)", + tex->opcode_string()); 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; + if (s_shadow->subexpressions.is_empty()) { + tex->shadow_comparitor = NULL; } else { - tex->shadow_comparitor = read_rvalue(st, shadow_list); + tex->shadow_comparitor = read_rvalue(s_shadow); if (tex->shadow_comparitor == NULL) { - ir_read_error(st, NULL, "when reading shadow comparitor in (%s ..)", - tag->value()); + ir_read_error(NULL, "when reading shadow comparitor in (%s ..)", + tex->opcode_string()); 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; + 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; } - default: - // tex doesn't have any extra parameters and txf was handled earlier. - break; - }; + break; } + default: + // tex doesn't have any extra parameters. + break; + }; return tex; } |