#include "glsl_types.h"
#include "s_expression.h"
-static void ir_read_error(s_expression *expr, const char *fmt, ...);
-static glsl_type *read_type(_mesa_glsl_parse_state *, s_expression *);
+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 read_instructions(_mesa_glsl_parse_state *, exec_list *,
+ s_expression *, ir_loop *);
static ir_instruction *read_instruction(_mesa_glsl_parse_state *,
- s_expression *);
+ 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_expression *read_expression(_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_dereference *read_var_ref(_mesa_glsl_parse_state *, s_list *);
+static ir_dereference *read_array_ref(_mesa_glsl_parse_state *, s_list *);
+static ir_dereference *read_record_ref(_mesa_glsl_parse_state *, s_list *);
void
_mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions,
{
s_expression *expr = s_expression::read_expression(src);
if (expr == NULL) {
- ir_read_error(NULL, "couldn't parse S-Expression.");
- state->error = true;
+ ir_read_error(state, NULL, "couldn't parse S-Expression.");
return;
}
printf("S-Expression:\n");
printf("\n-------------\n");
_mesa_glsl_initialize_types(state);
- _mesa_glsl_initialize_variables(instructions, state);
- _mesa_glsl_initialize_constructors(instructions, state);
- _mesa_glsl_initialize_functions(instructions, state);
- // 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.");
- state->error = true;
- return;
- }
+ /* FINISHME: Constructors probably shouldn't be emitted as part of the IR.
+ * FINISHME: Once they're not, remake them by calling:
+ * FINISHME: _mesa_glsl_initialize_constructors(instructions, state);
+ */
- foreach_iter(exec_list_iterator, it, list->subexpressions) {
- s_expression *sub = (s_expression*) it.get();
- ir_instruction *ir = read_instruction(state, sub);
- if (ir == NULL) {
- ir_read_error(sub, "Invalid instruction.\n");
- state->error = true;
- return;
- }
- instructions->push_tail(ir);
- }
+ read_instructions(state, instructions, expr, NULL);
}
static void
-ir_read_error(s_expression *expr, const char *fmt, ...)
+ir_read_error(_mesa_glsl_parse_state *state, s_expression *expr,
+ const char *fmt, ...)
{
char buf[1024];
int len;
va_list ap;
- // FIXME: state->error = true;
+ state->error = true;
len = snprintf(buf, sizeof(buf), "error: ");
printf("%s\n", buf);
}
-static glsl_type *
+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(expr, "expected type (array (...)) or (struct (...))");
+ ir_read_error(st, expr, "expected type (array ...) or (struct ...)");
return NULL;
}
- if (strcmp(type_sym->value(), "array") == 0)
- assert(false); // FINISHME
- if (strcmp(type_sym->value(), "struct") == 0)
+ 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, expr, "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(expr, "expected <type> (symbol or list)");
+ ir_read_error(st, expr, "expected <type> (symbol or list)");
return NULL;
}
- glsl_type *type = st->symbols->get_type(type_sym->value());
+ const glsl_type *type = st->symbols->get_type(type_sym->value());
if (type == NULL)
- ir_read_error(expr, "invalid type: %s", type_sym->value());
+ ir_read_error(st, expr, "invalid type: %s", type_sym->value());
return type;
}
+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) {
+ ir_read_error(st, sub, "Invalid instruction.\n");
+ return;
+ }
+ instructions->push_tail(ir);
+ }
+}
+
+
static ir_instruction *
-read_instruction(_mesa_glsl_parse_state *st, s_expression *expr)
+read_instruction(_mesa_glsl_parse_state *st, 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 ir_loop_jump(loop_ctx, ir_loop_jump::jump_break);
+ if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL)
+ return new ir_loop_jump(loop_ctx, ir_loop_jump::jump_continue);
+ }
+
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 instruction tag");
+ ir_read_error(st, expr, "expected instruction tag");
return NULL;
}
ir_instruction *inst = NULL;
- if (strcmp(tag->value(), "declare") == 0)
+ if (strcmp(tag->value(), "declare") == 0) {
inst = read_declaration(st, list);
- else if (strcmp(tag->value(), "return") == 0)
+ } 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
- ir_read_error(expr, "unrecognized instruction tag: %s", tag->value());
-
+ } else {
+ inst = read_rvalue(st, list);
+ if (inst == NULL)
+ ir_read_error(st, list, "when reading instruction");
+ }
return inst;
}
read_declaration(_mesa_glsl_parse_state *st, s_list *list)
{
if (list->length() != 4) {
- ir_read_error(list, "expected (declare (<qualifiers>) <type> <name>)");
+ 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(list, "expected a list of variable qualifiers");
+ ir_read_error(st, list, "expected a list of variable qualifiers");
return NULL;
}
s_expression *type_expr = (s_expression*) quals->next;
- glsl_type *type = read_type(st, type_expr);
+ 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(list, "expected variable name, found non-symbol");
+ ir_read_error(st, list, "expected variable name, found non-symbol");
return NULL;
}
foreach_iter(exec_list_iterator, it, quals->subexpressions) {
s_symbol *qualifier = SX_AS_SYMBOL(it.get());
if (qualifier == NULL) {
- ir_read_error(list, "qualifier list must contain only symbols");
+ ir_read_error(st, list, "qualifier list must contain only symbols");
delete var;
return NULL;
}
} else if (strcmp(qualifier->value(), "noperspective") == 0) {
var->interpolation = ir_var_noperspective;
} else {
- ir_read_error(list, "unknown qualifier: %s", qualifier->value());
+ ir_read_error(st, list, "unknown qualifier: %s", qualifier->value());
delete var;
return NULL;
}
}
+static ir_if *
+read_if(_mesa_glsl_parse_state *st, s_list *list, ir_loop *loop_ctx)
+{
+ 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, list, "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 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)
+{
+ 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 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)
{
if (list->length() != 2) {
- ir_read_error(list, "expected (return <rvalue>)");
+ ir_read_error(st, list, "expected (return <rvalue>)");
return NULL;
}
ir_rvalue *retval = read_rvalue(st, expr);
if (retval == NULL) {
- ir_read_error(list, "when reading return value");
+ ir_read_error(st, list, "when reading return value");
return NULL;
}
s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
if (tag == NULL) {
- ir_read_error(expr, "expected rvalue tag");
+ ir_read_error(st, expr, "expected rvalue tag");
return NULL;
}
ir_rvalue *rvalue = NULL;
- if (strcmp(tag->value(), "swiz") == 0)
+ if (strcmp(tag->value(), "swiz") == 0) {
rvalue = read_swizzle(st, list);
- else if (strcmp(tag->value(), "assign") == 0)
+ } else if (strcmp(tag->value(), "assign") == 0) {
rvalue = read_assignment(st, list);
- else if (strcmp(tag->value(), "expression") == 0)
+ } else if (strcmp(tag->value(), "expression") == 0) {
rvalue = read_expression(st, list);
// FINISHME: ir_call
- // FINISHME: dereference
- else if (strcmp(tag->value(), "constant") == 0)
+ } else if (strcmp(tag->value(), "constant") == 0) {
rvalue = read_constant(st, list);
- else
- ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value());
+ } else if (strcmp(tag->value(), "var_ref") == 0) {
+ rvalue = read_var_ref(st, list);
+ } else if (strcmp(tag->value(), "array_ref") == 0) {
+ rvalue = read_array_ref(st, list);
+ } else if (strcmp(tag->value(), "record_ref") == 0) {
+ rvalue = read_record_ref(st, list);
+ } else {
+ ir_read_error(st, expr, "unrecognized rvalue tag: %s", tag->value());
+ }
return rvalue;
}
read_assignment(_mesa_glsl_parse_state *st, s_list *list)
{
if (list->length() != 4) {
- ir_read_error(list, "expected (assign <condition> <lhs> <rhs>)");
+ ir_read_error(st, list, "expected (assign <condition> <lhs> <rhs>)");
return NULL;
}
// FINISHME: Deal with "true" condition
ir_rvalue *condition = read_rvalue(st, cond_expr);
if (condition == NULL) {
- ir_read_error(list, "when reading condition of assignment");
+ ir_read_error(st, list, "when reading condition of assignment");
return NULL;
}
ir_rvalue *lhs = read_rvalue(st, lhs_expr);
if (lhs == NULL) {
- ir_read_error(list, "when reading left-hand side of assignment");
+ ir_read_error(st, list, "when reading left-hand side of assignment");
return NULL;
}
ir_rvalue *rhs = read_rvalue(st, rhs_expr);
if (rhs == NULL) {
- ir_read_error(list, "when reading right-hand side of assignment");
+ ir_read_error(st, list, "when reading right-hand side of assignment");
return NULL;
}
{
const unsigned list_length = list->length();
if (list_length < 4) {
- ir_read_error(list, "expected (expression <type> <operator> <operand> "
- "[<operand>])");
+ ir_read_error(st, list, "expected (expression <type> <operator> "
+ "<operand> [<operand>])");
return NULL;
}
s_expression *type_expr = (s_expression*) list->subexpressions.head->next;
- glsl_type *type = read_type(st, type_expr);
+ 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(list, "expected operator, found non-symbol");
+ 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(list, "invalid operator: %s", op_sym->value());
+ 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(list, "expected (expression %s <operand1> <operand2>)",
+ ir_read_error(st, list, "expected (expression %s <operand> <operand>)",
op_sym->value());
return NULL;
}
} else {
if (list_length != 4) {
- ir_read_error(list, "expected (expression %s <operand>)",
+ ir_read_error(st, list, "expected (expression %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(list, "when reading first operand of %s", op_sym->value());
+ ir_read_error(st, list, "when reading first operand of %s",
+ op_sym->value());
return NULL;
}
s_expression *exp2 = (s_expression*) (exp1->next);
arg2 = read_rvalue(st, exp2);
if (arg2 == NULL) {
- ir_read_error(list, "when reading second operand of %s",
+ ir_read_error(st, list, "when reading second operand of %s",
op_sym->value());
return NULL;
}
read_swizzle(_mesa_glsl_parse_state *st, s_list *list)
{
if (list->length() != 3) {
- ir_read_error(list, "expected (swiz <swizzle> <rvalue>)");
+ 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(list, "expected a valid swizzle; found non-symbol");
+ ir_read_error(st, list, "expected a valid swizzle; found non-symbol");
return NULL;
}
unsigned num_components = strlen(swiz->value());
if (num_components > 4) {
- ir_read_error(list, "expected a valid swizzle; found %s", swiz->value());
+ ir_read_error(st, list, "expected a valid swizzle; found %s",
+ swiz->value());
return NULL;
}
s_expression *sub = (s_expression*) swiz->next;
if (sub == NULL) {
- ir_read_error(list, "expected rvalue: (swizzle %s <rvalue>)", swiz->value());
+ ir_read_error(st, list, "expected rvalue: (swizzle %s <rvalue>)",
+ swiz->value());
return NULL;
}
read_constant(_mesa_glsl_parse_state *st, s_list *list)
{
if (list->length() != 3) {
- ir_read_error(list, "expected (constant <type> (<num> ... <num>))");
+ ir_read_error(st, list, "expected (constant <type> (<num> ... <num>))");
return NULL;
}
s_expression *type_expr = (s_expression*) list->subexpressions.head->next;
- glsl_type *type = read_type(st, type_expr);
+ 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(list, "expected (constant <type> (<num> ... <num>))");
+ ir_read_error(st, list, "expected (constant <type> (<num> ... <num>))");
return NULL;
}
int k = 0;
foreach_iter(exec_list_iterator, it, values->subexpressions) {
if (k >= 16) {
- ir_read_error(values, "expected at most 16 numbers");
+ ir_read_error(st, values, "expected at most 16 numbers");
return NULL;
}
if (base_type->base_type == GLSL_TYPE_FLOAT) {
s_number *value = SX_AS_NUMBER(expr);
if (value == NULL) {
- ir_read_error(values, "expected numbers");
+ ir_read_error(st, values, "expected numbers");
return NULL;
}
f[k] = value->fvalue();
} else {
s_int *value = SX_AS_INT(expr);
if (value == NULL) {
- ir_read_error(values, "expected integers");
+ ir_read_error(st, values, "expected integers");
return NULL;
}
break;
}
default:
- ir_read_error(values, "unsupported constant type");
+ ir_read_error(st, values, "unsupported constant type");
return NULL;
}
}
}
return NULL; // should not be reached
}
+
+static ir_instruction *
+read_dereferencable(_mesa_glsl_parse_state *st, s_expression *expr)
+{
+ // Read the subject of a dereference - either a variable name or a swizzle
+ s_symbol *var_name = SX_AS_SYMBOL(expr);
+ if (var_name != NULL) {
+ ir_variable *var = st->symbols->get_variable(var_name->value());
+ if (var == NULL) {
+ ir_read_error(st, expr, "undeclared variable: %s", var_name->value());
+ }
+ return var;
+ } else {
+ // Hopefully a (swiz ...)
+ s_list *list = SX_AS_LIST(expr);
+ if (list != NULL && !list->subexpressions.is_empty()) {
+ s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.head);
+ if (tag != NULL && strcmp(tag->value(), "swiz") == 0)
+ return read_swizzle(st, list);
+ }
+ }
+ ir_read_error(st, expr, "expected variable name or (swiz ...)");
+ return NULL;
+}
+
+static ir_dereference *
+read_var_ref(_mesa_glsl_parse_state *st, s_list *list)
+{
+ if (list->length() != 2) {
+ ir_read_error(st, list, "expected (var_ref <variable name or (swiz)>)");
+ return NULL;
+ }
+ s_expression *subj_expr = (s_expression*) list->subexpressions.head->next;
+ ir_instruction *subject = read_dereferencable(st, subj_expr);
+ if (subject == NULL)
+ return NULL;
+ return new ir_dereference(subject);
+}
+
+static ir_dereference *
+read_array_ref(_mesa_glsl_parse_state *st, s_list *list)
+{
+ if (list->length() != 3) {
+ ir_read_error(st, list, "expected (array_ref <variable name or (swiz)> "
+ "<rvalue>)");
+ return NULL;
+ }
+
+ s_expression *subj_expr = (s_expression*) list->subexpressions.head->next;
+ ir_instruction *subject = read_dereferencable(st, subj_expr);
+ if (subject == NULL)
+ return NULL;
+
+ s_expression *idx_expr = (s_expression*) subj_expr->next;
+ ir_rvalue *idx = read_rvalue(st, idx_expr);
+ return new ir_dereference(subject, idx);
+}
+
+static ir_dereference *
+read_record_ref(_mesa_glsl_parse_state *st, s_list *list)
+{
+ ir_read_error(st, list, "FINISHME: record refs not yet supported.");
+ return NULL;
+}
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