#include "main/imports.h"
#include "main/simple_list.h"
#include "ir.h"
+#include "ir_visitor.h"
#include "glsl_types.h"
-ir_assignment::ir_assignment(ir_instruction *lhs, ir_instruction *rhs,
- ir_expression *condition)
- : ir_instruction(ir_op_assign)
+ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
+ ir_rvalue *condition)
{
- this->lhs = (ir_dereference *) lhs;
+ this->lhs = lhs;
this->rhs = rhs;
this->condition = condition;
}
ir_expression::ir_expression(int op, const struct glsl_type *type,
- ir_instruction *op0, ir_instruction *op1)
- : ir_instruction(ir_op_expression)
+ ir_rvalue *op0, ir_rvalue *op1)
{
this->type = type;
this->operation = ir_expression_operation(op);
this->operands[1] = op1;
}
+unsigned int
+ir_expression::get_num_operands(void)
+{
+/* Update ir_print_visitor.cpp when updating this list. */
+ const int num_operands[] = {
+ 1, /* ir_unop_bit_not */
+ 1, /* ir_unop_logic_not */
+ 1, /* ir_unop_neg */
+ 1, /* ir_unop_abs */
+ 1, /* ir_unop_rcp */
+ 1, /* ir_unop_rsq */
+ 1, /* ir_unop_sqrt */
+ 1, /* ir_unop_exp */
+ 1, /* ir_unop_log */
+ 1, /* ir_unop_exp2 */
+ 1, /* ir_unop_log2 */
+ 1, /* ir_unop_f2i */
+ 1, /* ir_unop_i2f */
+ 1, /* ir_unop_f2b */
+ 1, /* ir_unop_b2f */
+ 1, /* ir_unop_i2b */
+ 1, /* ir_unop_b2i */
+ 1, /* ir_unop_u2f */
+
+ 1, /* ir_unop_trunc */
+ 1, /* ir_unop_ceil */
+ 1, /* ir_unop_floor */
+
+ 2, /* ir_binop_add */
+ 2, /* ir_binop_sub */
+ 2, /* ir_binop_mul */
+ 2, /* ir_binop_div */
+ 2, /* ir_binop_mod */
+
+ 2, /* ir_binop_less */
+ 2, /* ir_binop_greater */
+ 2, /* ir_binop_lequal */
+ 2, /* ir_binop_gequal */
+ 2, /* ir_binop_equal */
+ 2, /* ir_binop_nequal */
+
+ 2, /* ir_binop_lshift */
+ 2, /* ir_binop_rshift */
+ 2, /* ir_binop_bit_and */
+ 2, /* ir_binop_bit_xor */
+ 2, /* ir_binop_bit_or */
+
+ 2, /* ir_binop_logic_and */
+ 2, /* ir_binop_logic_xor */
+ 2, /* ir_binop_logic_or */
+
+ 2, /* ir_binop_dot */
+ 2, /* ir_binop_min */
+ 2, /* ir_binop_max */
+
+ 2, /* ir_binop_pow */
+ };
+
+ assert(sizeof(num_operands) / sizeof(num_operands[0]) == ir_binop_pow + 1);
-ir_label::ir_label(const char *label)
- : ir_instruction(ir_op_label), label(label)
+ return num_operands[this->operation];
+}
+
+ir_label::ir_label(const char *label, ir_function_signature *signature)
+ : label(label), signature(signature)
{
/* empty */
}
ir_constant::ir_constant(const struct glsl_type *type, const void *data)
- : ir_instruction(ir_op_constant)
{
- const unsigned elements =
- ((type->vector_elements == 0) ? 1 : type->vector_elements)
- * ((type->matrix_rows == 0) ? 1 : type->matrix_rows);
unsigned size = 0;
this->type = type;
break;
}
- memcpy(& this->value, data, size * elements);
+ memcpy(& this->value, data, size * type->components());
+}
+
+ir_constant::ir_constant(float f)
+{
+ this->type = glsl_type::float_type;
+ this->value.f[0] = f;
+}
+
+ir_constant::ir_constant(unsigned int u)
+{
+ this->type = glsl_type::uint_type;
+ this->value.u[0] = u;
+}
+
+ir_constant::ir_constant(int i)
+{
+ this->type = glsl_type::int_type;
+ this->value.i[0] = i;
+}
+
+ir_constant::ir_constant(bool b)
+{
+ this->type = glsl_type::bool_type;
+ this->value.b[0] = b;
}
ir_dereference::ir_dereference(ir_instruction *var)
- : ir_instruction(ir_op_dereference)
{
this->mode = ir_reference_variable;
this->var = var;
- this->type = (var != NULL) ? var->type : glsl_error_type;
+ this->type = (var != NULL) ? var->type : glsl_type::error_type;
+}
+
+
+ir_dereference::ir_dereference(ir_instruction *var,
+ ir_rvalue *array_index)
+ : mode(ir_reference_array), var(var)
+{
+ type = glsl_type::error_type;
+
+ if (var != NULL) {
+ const glsl_type *const vt = var->type;
+
+ if (vt->is_array()) {
+ type = vt->element_type();
+ } else if (vt->is_matrix()) {
+ type = vt->column_type();
+ } else if (vt->is_vector()) {
+ type = vt->get_base_type();
+ }
+ }
+
+ this->selector.array_index = array_index;
+}
+
+bool
+ir_dereference::is_lvalue()
+{
+ if (var == NULL)
+ return false;
+
+ if (mode == ir_reference_variable) {
+ ir_variable *const as_var = var->as_variable();
+ if (as_var == NULL)
+ return false;
+
+ if (as_var->type->is_array() && !as_var->array_lvalue)
+ return false;
+
+ return !as_var->read_only;
+ } else if (mode == ir_reference_array) {
+ /* FINISHME: Walk up the dereference chain and figure out if
+ * FINISHME: the variable is read-only.
+ */
+ }
+
+ return true;
+}
+
+ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
+ unsigned w, unsigned count)
+ : val(val)
+{
+ assert((count >= 1) && (count <= 4));
+
+ const unsigned dup_mask = 0
+ | ((count > 1) ? ((1U << y) & ((1U << x) )) : 0)
+ | ((count > 2) ? ((1U << z) & ((1U << x) | (1U << y) )) : 0)
+ | ((count > 3) ? ((1U << w) & ((1U << x) | (1U << y) | (1U << z))) : 0);
+
+ assert(x <= 3);
+ assert(y <= 3);
+ assert(z <= 3);
+ assert(w <= 3);
+
+ mask.x = x;
+ mask.y = y;
+ mask.z = z;
+ mask.w = w;
+ mask.num_components = count;
+ mask.has_duplicates = dup_mask != 0;
+
+ /* Based on the number of elements in the swizzle and the base type
+ * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
+ * generate the type of the resulting value.
+ */
+ type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
}
+#define X 1
+#define R 5
+#define S 9
+#define I 13
+
+ir_swizzle *
+ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
+{
+ /* For each possible swizzle character, this table encodes the value in
+ * \c idx_map that represents the 0th element of the vector. For invalid
+ * swizzle characters (e.g., 'k'), a special value is used that will allow
+ * detection of errors.
+ */
+ static const unsigned char base_idx[26] = {
+ /* a b c d e f g h i j k l m */
+ R, R, I, I, I, I, R, I, I, I, I, I, I,
+ /* n o p q r s t u v w x y z */
+ I, I, S, S, R, S, S, I, I, X, X, X, X
+ };
+
+ /* Each valid swizzle character has an entry in the previous table. This
+ * table encodes the base index encoded in the previous table plus the actual
+ * index of the swizzle character. When processing swizzles, the first
+ * character in the string is indexed in the previous table. Each character
+ * in the string is indexed in this table, and the value found there has the
+ * value form the first table subtracted. The result must be on the range
+ * [0,3].
+ *
+ * For example, the string "wzyx" will get X from the first table. Each of
+ * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
+ * subtraction, the swizzle values are { 3, 2, 1, 0 }.
+ *
+ * The string "wzrg" will get X from the first table. Each of the characters
+ * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
+ * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
+ * [0,3], the error is detected.
+ */
+ static const unsigned char idx_map[26] = {
+ /* a b c d e f g h i j k l m */
+ R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
+ /* n o p q r s t u v w x y z */
+ 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
+ };
+
+ int swiz_idx[4] = { 0, 0, 0, 0 };
+ unsigned i;
+
+
+ /* Validate the first character in the swizzle string and look up the base
+ * index value as described above.
+ */
+ if ((str[0] < 'a') || (str[0] > 'z'))
+ return NULL;
+
+ const unsigned base = base_idx[str[0] - 'a'];
+
+
+ for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
+ /* Validate the next character, and, as described above, convert it to a
+ * swizzle index.
+ */
+ if ((str[i] < 'a') || (str[i] > 'z'))
+ return NULL;
+
+ swiz_idx[i] = idx_map[str[i] - 'a'] - base;
+ if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
+ return NULL;
+ }
+
+ if (str[i] != '\0')
+ return NULL;
+
+ return new ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
+ swiz_idx[3], i);
+}
+
+#undef X
+#undef R
+#undef S
+#undef I
+
ir_variable::ir_variable(const struct glsl_type *type, const char *name)
- : ir_instruction(ir_op_var_decl), read_only(false), centroid(false),
- invariant(false), mode(ir_var_auto), interpolation(ir_var_smooth)
+ : max_array_access(0), read_only(false), centroid(false), invariant(false),
+ mode(ir_var_auto), interpolation(ir_var_smooth)
{
this->type = type;
this->name = name;
+ this->constant_value = NULL;
+
+ if (type && type->base_type == GLSL_TYPE_SAMPLER)
+ this->read_only = true;
}
ir_function_signature::ir_function_signature(const glsl_type *return_type)
- : ir_instruction(ir_op_func_sig), return_type(return_type), definition(NULL)
+ : return_type(return_type), definition(NULL)
{
/* empty */
}
ir_function::ir_function(const char *name)
- : ir_instruction(ir_op_func), name(name)
+ : name(name)
{
/* empty */
}
{
ir_call *call = new ir_call;
- call->type = glsl_error_type;
+ call->type = glsl_type::error_type;
return call;
}
+
+void
+visit_exec_list(exec_list *list, ir_visitor *visitor)
+{
+ foreach_iter(exec_list_iterator, iter, *list) {
+ ((ir_instruction *)iter.get())->accept(visitor);
+ }
+}
+
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