#include "glsl_types.h"
#include "program/hash_table.h"
+#if defined(_MSC_VER) && (_MSC_VER < 1800)
+static int isnormal(double x)
+{
+ return _fpclass(x) == _FPCLASS_NN || _fpclass(x) == _FPCLASS_PN;
+}
+#elif defined(__SUNPRO_CC)
+#include <ieeefp.h>
+static int isnormal(double x)
+{
+ return fpclass(x) == FP_NORMAL;
+}
+#endif
+
+#if defined(_MSC_VER)
+static double copysign(double x, double y)
+{
+ return _copysign(x, y);
+}
+#endif
+
static float
dot(ir_constant *op0, ir_constant *op1)
{
return _mesa_half_to_float(u);
}
+/**
+ * Get the constant that is ultimately referenced by an r-value, in a constant
+ * expression evaluation context.
+ *
+ * The offset is used when the reference is to a specific column of a matrix.
+ */
+static bool
+constant_referenced(const ir_dereference *deref,
+ struct hash_table *variable_context,
+ ir_constant *&store, int &offset)
+{
+ store = NULL;
+ offset = 0;
+
+ if (variable_context == NULL)
+ return false;
+
+ switch (deref->ir_type) {
+ case ir_type_dereference_array: {
+ const ir_dereference_array *const da =
+ (const ir_dereference_array *) deref;
+
+ ir_constant *const index_c =
+ da->array_index->constant_expression_value(variable_context);
+
+ if (!index_c || !index_c->type->is_scalar() || !index_c->type->is_integer())
+ break;
+
+ const int index = index_c->type->base_type == GLSL_TYPE_INT ?
+ index_c->get_int_component(0) :
+ index_c->get_uint_component(0);
+
+ ir_constant *substore;
+ int suboffset;
+
+ const ir_dereference *const deref = da->array->as_dereference();
+ if (!deref)
+ break;
+
+ if (!constant_referenced(deref, variable_context, substore, suboffset))
+ break;
+
+ const glsl_type *const vt = da->array->type;
+ if (vt->is_array()) {
+ store = substore->get_array_element(index);
+ offset = 0;
+ } else if (vt->is_matrix()) {
+ store = substore;
+ offset = index * vt->vector_elements;
+ } else if (vt->is_vector()) {
+ store = substore;
+ offset = suboffset + index;
+ }
+
+ break;
+ }
+
+ case ir_type_dereference_record: {
+ const ir_dereference_record *const dr =
+ (const ir_dereference_record *) deref;
+
+ const ir_dereference *const deref = dr->record->as_dereference();
+ if (!deref)
+ break;
+
+ ir_constant *substore;
+ int suboffset;
+
+ if (!constant_referenced(deref, variable_context, substore, suboffset))
+ break;
+
+ /* Since we're dropping it on the floor...
+ */
+ assert(suboffset == 0);
+
+ store = substore->get_record_field(dr->field);
+ break;
+ }
+
+ case ir_type_dereference_variable: {
+ const ir_dereference_variable *const dv =
+ (const ir_dereference_variable *) deref;
+
+ store = (ir_constant *) hash_table_find(variable_context, dv->var);
+ break;
+ }
+
+ default:
+ assert(!"Should not get here.");
+ break;
+ }
+
+ return store != NULL;
+}
+
+
ir_constant *
-ir_rvalue::constant_expression_value(struct hash_table *variable_context)
+ir_rvalue::constant_expression_value(struct hash_table *)
{
assert(this->type->is_error());
return NULL;
}
if (op[1] != NULL)
- assert(op[0]->type->base_type == op[1]->type->base_type ||
- this->operation == ir_binop_lshift ||
- this->operation == ir_binop_rshift);
+ switch (this->operation) {
+ case ir_binop_lshift:
+ case ir_binop_rshift:
+ case ir_binop_ldexp:
+ case ir_binop_vector_extract:
+ case ir_triop_csel:
+ case ir_triop_bitfield_extract:
+ break;
+
+ default:
+ assert(op[0]->type->base_type == op[1]->type->base_type);
+ break;
+ }
bool op0_scalar = op[0]->type->is_scalar();
bool op1_scalar = op[1] != NULL && op[1]->type->is_scalar();
}
break;
+ case ir_binop_vector_extract: {
+ const int c = CLAMP(op[1]->value.i[0], 0,
+ (int) op[0]->type->vector_elements - 1);
+
+ switch (op[0]->type->base_type) {
+ case GLSL_TYPE_UINT:
+ data.u[0] = op[0]->value.u[c];
+ break;
+ case GLSL_TYPE_INT:
+ data.i[0] = op[0]->value.i[c];
+ break;
+ case GLSL_TYPE_FLOAT:
+ data.f[0] = op[0]->value.f[c];
+ break;
+ case GLSL_TYPE_BOOL:
+ data.b[0] = op[0]->value.b[c];
+ break;
+ default:
+ assert(0);
+ }
+ break;
+ }
+
case ir_binop_bit_xor:
for (unsigned c = 0, c0 = 0, c1 = 0;
c < components;
}
break;
+ case ir_unop_bitfield_reverse:
+ /* http://graphics.stanford.edu/~seander/bithacks.html#BitReverseObvious */
+ for (unsigned c = 0; c < components; c++) {
+ unsigned int v = op[0]->value.u[c]; // input bits to be reversed
+ unsigned int r = v; // r will be reversed bits of v; first get LSB of v
+ int s = sizeof(v) * CHAR_BIT - 1; // extra shift needed at end
+
+ for (v >>= 1; v; v >>= 1) {
+ r <<= 1;
+ r |= v & 1;
+ s--;
+ }
+ r <<= s; // shift when v's highest bits are zero
+
+ data.u[c] = r;
+ }
+ break;
+
+ case ir_unop_bit_count:
+ for (unsigned c = 0; c < components; c++) {
+ unsigned count = 0;
+ unsigned v = op[0]->value.u[c];
+
+ for (; v; count++) {
+ v &= v - 1;
+ }
+ data.u[c] = count;
+ }
+ break;
+
+ case ir_unop_find_msb:
+ for (unsigned c = 0; c < components; c++) {
+ int v = op[0]->value.i[c];
+
+ if (v == 0 || (op[0]->type->base_type == GLSL_TYPE_INT && v == -1))
+ data.i[c] = -1;
+ else {
+ int count = 0;
+ int top_bit = op[0]->type->base_type == GLSL_TYPE_UINT
+ ? 0 : v & (1 << 31);
+
+ while (((v & (1 << 31)) == top_bit) && count != 32) {
+ count++;
+ v <<= 1;
+ }
+
+ data.i[c] = 31 - count;
+ }
+ }
+ break;
+
+ case ir_unop_find_lsb:
+ for (unsigned c = 0; c < components; c++) {
+ if (op[0]->value.i[c] == 0)
+ data.i[c] = -1;
+ else {
+ unsigned pos = 0;
+ unsigned v = op[0]->value.u[c];
+
+ for (; !(v & 1); v >>= 1) {
+ pos++;
+ }
+ data.u[c] = pos;
+ }
+ }
+ break;
+
+ case ir_triop_bitfield_extract: {
+ int offset = op[1]->value.i[0];
+ int bits = op[2]->value.i[0];
+
+ for (unsigned c = 0; c < components; c++) {
+ if (bits == 0)
+ data.u[c] = 0;
+ else if (offset < 0 || bits < 0)
+ data.u[c] = 0; /* Undefined, per spec. */
+ else if (offset + bits > 32)
+ data.u[c] = 0; /* Undefined, per spec. */
+ else {
+ if (op[0]->type->base_type == GLSL_TYPE_INT) {
+ /* int so that the right shift will sign-extend. */
+ int value = op[0]->value.i[c];
+ value <<= 32 - bits - offset;
+ value >>= 32 - bits;
+ data.i[c] = value;
+ } else {
+ unsigned value = op[0]->value.u[c];
+ value <<= 32 - bits - offset;
+ value >>= 32 - bits;
+ data.u[c] = value;
+ }
+ }
+ }
+ break;
+ }
+
+ case ir_binop_bfm: {
+ int bits = op[0]->value.i[0];
+ int offset = op[1]->value.i[0];
+
+ for (unsigned c = 0; c < components; c++) {
+ if (bits == 0)
+ data.u[c] = op[0]->value.u[c];
+ else if (offset < 0 || bits < 0)
+ data.u[c] = 0; /* Undefined for bitfieldInsert, per spec. */
+ else if (offset + bits > 32)
+ data.u[c] = 0; /* Undefined for bitfieldInsert, per spec. */
+ else
+ data.u[c] = ((1 << bits) - 1) << offset;
+ }
+ break;
+ }
+
+ case ir_binop_ldexp:
+ for (unsigned c = 0; c < components; c++) {
+ data.f[c] = ldexp(op[0]->value.f[c], op[1]->value.i[c]);
+ /* Flush subnormal values to zero. */
+ if (!isnormal(data.f[c]))
+ data.f[c] = copysign(0.0f, op[0]->value.f[c]);
+ }
+ break;
+
+ case ir_triop_fma:
+ assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
+ assert(op[1]->type->base_type == GLSL_TYPE_FLOAT);
+ assert(op[2]->type->base_type == GLSL_TYPE_FLOAT);
+
+ for (unsigned c = 0; c < components; c++) {
+ data.f[c] = op[0]->value.f[c] * op[1]->value.f[c]
+ + op[2]->value.f[c];
+ }
+ break;
+
case ir_triop_lrp: {
assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
assert(op[1]->type->base_type == GLSL_TYPE_FLOAT);
break;
}
+ case ir_triop_csel:
+ for (unsigned c = 0; c < components; c++) {
+ data.u[c] = op[0]->value.b[c] ? op[1]->value.u[c]
+ : op[2]->value.u[c];
+ }
+ break;
+
+ case ir_triop_vector_insert: {
+ const unsigned idx = op[2]->value.u[0];
+
+ memcpy(&data, &op[0]->value, sizeof(data));
+
+ switch (this->type->base_type) {
+ case GLSL_TYPE_INT:
+ data.i[idx] = op[1]->value.i[0];
+ break;
+ case GLSL_TYPE_UINT:
+ data.u[idx] = op[1]->value.u[0];
+ break;
+ case GLSL_TYPE_FLOAT:
+ data.f[idx] = op[1]->value.f[0];
+ break;
+ case GLSL_TYPE_BOOL:
+ data.b[idx] = op[1]->value.b[0];
+ break;
+ default:
+ assert(!"Should not get here.");
+ break;
+ }
+ break;
+ }
+
+ case ir_quadop_bitfield_insert: {
+ int offset = op[2]->value.i[0];
+ int bits = op[3]->value.i[0];
+
+ for (unsigned c = 0; c < components; c++) {
+ if (bits == 0)
+ data.u[c] = op[0]->value.u[c];
+ else if (offset < 0 || bits < 0)
+ data.u[c] = 0; /* Undefined, per spec. */
+ else if (offset + bits > 32)
+ data.u[c] = 0; /* Undefined, per spec. */
+ else {
+ unsigned insert_mask = ((1 << bits) - 1) << offset;
+
+ unsigned insert = op[1]->value.u[c];
+ insert <<= offset;
+ insert &= insert_mask;
+
+ unsigned base = op[0]->value.u[c];
+ base &= ~insert_mask;
+
+ data.u[c] = base | insert;
+ }
+ }
+ break;
+ }
+
case ir_quadop_vector:
for (unsigned c = 0; c < this->type->vector_elements; c++) {
switch (this->type->base_type) {
ir_constant *
-ir_texture::constant_expression_value(struct hash_table *variable_context)
+ir_texture::constant_expression_value(struct hash_table *)
{
/* texture lookups aren't constant expressions */
return NULL;
}
-void
-ir_dereference_variable::constant_referenced(struct hash_table *variable_context,
- ir_constant *&store, int &offset) const
-{
- if (variable_context) {
- store = (ir_constant *)hash_table_find(variable_context, var);
- offset = 0;
- } else {
- store = NULL;
- offset = 0;
- }
-}
-
ir_constant *
ir_dereference_variable::constant_expression_value(struct hash_table *variable_context)
{
/* The constant_value of a uniform variable is its initializer,
* not the lifetime constant value of the uniform.
*/
- if (var->mode == ir_var_uniform)
+ if (var->data.mode == ir_var_uniform)
return NULL;
if (!var->constant_value)
}
-void
-ir_dereference_array::constant_referenced(struct hash_table *variable_context,
- ir_constant *&store, int &offset) const
-{
- ir_constant *index_c = array_index->constant_expression_value(variable_context);
-
- if (!index_c || !index_c->type->is_scalar() || !index_c->type->is_integer()) {
- store = 0;
- offset = 0;
- return;
- }
-
- int index = index_c->type->base_type == GLSL_TYPE_INT ?
- index_c->get_int_component(0) :
- index_c->get_uint_component(0);
-
- ir_constant *substore;
- int suboffset;
- const ir_dereference *deref = array->as_dereference();
- if (!deref) {
- store = 0;
- offset = 0;
- return;
- }
-
- deref->constant_referenced(variable_context, substore, suboffset);
-
- if (!substore) {
- store = 0;
- offset = 0;
- return;
- }
-
- const glsl_type *vt = array->type;
- if (vt->is_array()) {
- store = substore->get_array_element(index);
- offset = 0;
- return;
- }
- if (vt->is_matrix()) {
- store = substore;
- offset = index * vt->vector_elements;
- return;
- }
- if (vt->is_vector()) {
- store = substore;
- offset = suboffset + index;
- return;
- }
-
- store = 0;
- offset = 0;
-}
-
ir_constant *
ir_dereference_array::constant_expression_value(struct hash_table *variable_context)
{
}
-void
-ir_dereference_record::constant_referenced(struct hash_table *variable_context,
- ir_constant *&store, int &offset) const
-{
- ir_constant *substore;
- int suboffset;
- const ir_dereference *deref = record->as_dereference();
- if (!deref) {
- store = 0;
- offset = 0;
- return;
- }
-
- deref->constant_referenced(variable_context, substore, suboffset);
-
- if (!substore) {
- store = 0;
- offset = 0;
- return;
- }
-
- store = substore->get_record_field(field);
- offset = 0;
-}
-
ir_constant *
-ir_dereference_record::constant_expression_value(struct hash_table *variable_context)
+ir_dereference_record::constant_expression_value(struct hash_table *)
{
ir_constant *v = this->record->constant_expression_value();
ir_constant *
-ir_assignment::constant_expression_value(struct hash_table *variable_context)
+ir_assignment::constant_expression_value(struct hash_table *)
{
/* FINISHME: Handle CEs involving assignment (return RHS) */
return NULL;
ir_constant *
-ir_constant::constant_expression_value(struct hash_table *variable_context)
+ir_constant::constant_expression_value(struct hash_table *)
{
return this;
}
ir_constant *store = NULL;
int offset = 0;
- asg->lhs->constant_referenced(variable_context, store, offset);
- if (!store)
+ if (!constant_referenced(asg->lhs, variable_context, store, offset))
return false;
ir_constant *value = asg->rhs->constant_expression_value(variable_context);
ir_constant *store = NULL;
int offset = 0;
- call->return_deref->constant_referenced(variable_context, store, offset);
- if (!store)
+ if (!constant_referenced(call->return_deref, variable_context,
+ store, offset))
return false;
ir_constant *value = call->constant_expression_value(variable_context);
* "Function calls to user-defined functions (non-built-in functions)
* cannot be used to form constant expressions."
*/
- if (!this->is_builtin)
+ if (!this->is_builtin())
return NULL;
/*
projects / mesa.git / blobdiff