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author | marha <marha@users.sourceforge.net> | 2011-02-01 10:46:14 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2011-02-01 10:46:14 +0000 |
commit | d4a8565009962e162d86a9c4ae24062a3fa12025 (patch) | |
tree | bcd249c3c523b23a6350b1d6b5a2cff7518cdb0e /mesalib/src/glsl/lower_vector.cpp | |
parent | 6751d9898be671d253d6f7b0806cd4b10daaaf85 (diff) | |
parent | 0bf07d32cbd460220c67d726900772cf3692746d (diff) | |
download | vcxsrv-d4a8565009962e162d86a9c4ae24062a3fa12025.tar.gz vcxsrv-d4a8565009962e162d86a9c4ae24062a3fa12025.tar.bz2 vcxsrv-d4a8565009962e162d86a9c4ae24062a3fa12025.zip |
svn merge ^/branches/released .
Diffstat (limited to 'mesalib/src/glsl/lower_vector.cpp')
-rw-r--r-- | mesalib/src/glsl/lower_vector.cpp | 448 |
1 files changed, 224 insertions, 224 deletions
diff --git a/mesalib/src/glsl/lower_vector.cpp b/mesalib/src/glsl/lower_vector.cpp index 3ed8d05d6..57963a121 100644 --- a/mesalib/src/glsl/lower_vector.cpp +++ b/mesalib/src/glsl/lower_vector.cpp @@ -1,224 +1,224 @@ -/*
- * 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.
- */
-
-/**
- * \file lower_vector.cpp
- * IR lowering pass to remove some types of ir_quadop_vector
- *
- * \author Ian Romanick <ian.d.romanick@intel.com>
- */
-
-#include "ir.h"
-#include "ir_rvalue_visitor.h"
-
-class lower_vector_visitor : public ir_rvalue_visitor {
-public:
- lower_vector_visitor() : progress(false)
- {
- /* empty */
- }
-
- void handle_rvalue(ir_rvalue **rvalue);
-
- /**
- * Should SWZ-like expressions be lowered?
- */
- bool dont_lower_swz;
-
- bool progress;
-};
-
-/**
- * Determine if an IR expression tree looks like an extended swizzle
- *
- * Extended swizzles consist of access of a single vector source (with possible
- * per component negation) and the constants -1, 0, or 1.
- */
-bool
-is_extended_swizzle(ir_expression *ir)
-{
- /* Track any variables that are accessed by this expression.
- */
- ir_variable *var = NULL;
-
- assert(ir->operation == ir_quadop_vector);
-
- for (unsigned i = 0; i < ir->type->vector_elements; i++) {
- ir_rvalue *op = ir->operands[i];
-
- while (op != NULL) {
- switch (op->ir_type) {
- case ir_type_constant: {
- const ir_constant *const c = op->as_constant();
-
- if (!c->is_one() && !c->is_zero() && !c->is_negative_one())
- return false;
-
- op = NULL;
- break;
- }
-
- case ir_type_dereference_variable: {
- ir_dereference_variable *const d = (ir_dereference_variable *) op;
-
- if ((var != NULL) && (var != d->var))
- return false;
-
- var = d->var;
- op = NULL;
- break;
- }
-
- case ir_type_expression: {
- ir_expression *const ex = (ir_expression *) op;
-
- if (ex->operation != ir_unop_neg)
- return false;
-
- op = ex->operands[0];
- break;
- }
-
- case ir_type_swizzle:
- op = ((ir_swizzle *) op)->val;
- break;
-
- default:
- return false;
- }
- }
- }
-
- return true;
-}
-
-void
-lower_vector_visitor::handle_rvalue(ir_rvalue **rvalue)
-{
- if (!*rvalue)
- return;
-
- ir_expression *expr = (*rvalue)->as_expression();
- if ((expr == NULL) || (expr->operation != ir_quadop_vector))
- return;
-
- if (this->dont_lower_swz && is_extended_swizzle(expr))
- return;
-
- /* FINISHME: Is this the right thing to use for the talloc context?
- */
- void *const mem_ctx = expr;
-
- assert(expr->type->vector_elements == expr->get_num_operands());
-
- /* Generate a temporary with the same type as the ir_quadop_operation.
- */
- ir_variable *const temp =
- new(mem_ctx) ir_variable(expr->type, "vecop_tmp", ir_var_temporary);
-
- this->base_ir->insert_before(temp);
-
- /* Counter of the number of components collected so far.
- */
- unsigned assigned;
-
- /* Write-mask in the destination that receives counted by 'assigned'.
- */
- unsigned write_mask;
-
-
- /* Generate upto four assignments to that variable. Try to group component
- * assignments together:
- *
- * - All constant components can be assigned at once.
- * - All assigments of components from a single variable with the same
- * unary operator can be assigned at once.
- */
- ir_constant_data d = { { 0 } };
-
- assigned = 0;
- write_mask = 0;
- for (unsigned i = 0; i < expr->type->vector_elements; i++) {
- const ir_constant *const c = expr->operands[i]->as_constant();
-
- if (c == NULL)
- continue;
-
- switch (expr->type->base_type) {
- case GLSL_TYPE_UINT: d.u[assigned] = c->value.u[0]; break;
- case GLSL_TYPE_INT: d.i[assigned] = c->value.i[0]; break;
- case GLSL_TYPE_FLOAT: d.f[assigned] = c->value.f[0]; break;
- case GLSL_TYPE_BOOL: d.b[assigned] = c->value.b[0]; break;
- default: assert(!"Should not get here."); break;
- }
-
- write_mask |= (1U << i);
- assigned++;
- }
-
- assert((write_mask == 0) == (assigned == 0));
-
- /* If there were constant values, generate an assignment.
- */
- if (assigned > 0) {
- ir_constant *const c =
- new(mem_ctx) ir_constant(glsl_type::get_instance(expr->type->base_type,
- assigned, 0),
- &d);
- ir_dereference *const lhs = new(mem_ctx) ir_dereference_variable(temp);
- ir_assignment *const assign =
- new(mem_ctx) ir_assignment(lhs, c, NULL, write_mask);
-
- this->base_ir->insert_before(assign);
- }
-
- /* FINISHME: This should try to coalesce assignments.
- */
- for (unsigned i = 0; i < expr->type->vector_elements; i++) {
- if (expr->operands[i]->ir_type == ir_type_constant)
- continue;
-
- ir_dereference *const lhs = new(mem_ctx) ir_dereference_variable(temp);
- ir_assignment *const assign =
- new(mem_ctx) ir_assignment(lhs, expr->operands[i], NULL, (1U << i));
-
- this->base_ir->insert_before(assign);
- assigned++;
- }
-
- assert(assigned == expr->type->vector_elements);
-
- *rvalue = new(mem_ctx) ir_dereference_variable(temp);
- this->progress = true;
-}
-
-bool
-lower_quadop_vector(exec_list *instructions, bool dont_lower_swz)
-{
- lower_vector_visitor v;
-
- v.dont_lower_swz = dont_lower_swz;
- visit_list_elements(&v, instructions);
-
- return v.progress;
-}
+/* + * 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. + */ + +/** + * \file lower_vector.cpp + * IR lowering pass to remove some types of ir_quadop_vector + * + * \author Ian Romanick <ian.d.romanick@intel.com> + */ + +#include "ir.h" +#include "ir_rvalue_visitor.h" + +class lower_vector_visitor : public ir_rvalue_visitor { +public: + lower_vector_visitor() : progress(false) + { + /* empty */ + } + + void handle_rvalue(ir_rvalue **rvalue); + + /** + * Should SWZ-like expressions be lowered? + */ + bool dont_lower_swz; + + bool progress; +}; + +/** + * Determine if an IR expression tree looks like an extended swizzle + * + * Extended swizzles consist of access of a single vector source (with possible + * per component negation) and the constants -1, 0, or 1. + */ +bool +is_extended_swizzle(ir_expression *ir) +{ + /* Track any variables that are accessed by this expression. + */ + ir_variable *var = NULL; + + assert(ir->operation == ir_quadop_vector); + + for (unsigned i = 0; i < ir->type->vector_elements; i++) { + ir_rvalue *op = ir->operands[i]; + + while (op != NULL) { + switch (op->ir_type) { + case ir_type_constant: { + const ir_constant *const c = op->as_constant(); + + if (!c->is_one() && !c->is_zero() && !c->is_negative_one()) + return false; + + op = NULL; + break; + } + + case ir_type_dereference_variable: { + ir_dereference_variable *const d = (ir_dereference_variable *) op; + + if ((var != NULL) && (var != d->var)) + return false; + + var = d->var; + op = NULL; + break; + } + + case ir_type_expression: { + ir_expression *const ex = (ir_expression *) op; + + if (ex->operation != ir_unop_neg) + return false; + + op = ex->operands[0]; + break; + } + + case ir_type_swizzle: + op = ((ir_swizzle *) op)->val; + break; + + default: + return false; + } + } + } + + return true; +} + +void +lower_vector_visitor::handle_rvalue(ir_rvalue **rvalue) +{ + if (!*rvalue) + return; + + ir_expression *expr = (*rvalue)->as_expression(); + if ((expr == NULL) || (expr->operation != ir_quadop_vector)) + return; + + if (this->dont_lower_swz && is_extended_swizzle(expr)) + return; + + /* FINISHME: Is this the right thing to use for the ralloc context? + */ + void *const mem_ctx = expr; + + assert(expr->type->vector_elements == expr->get_num_operands()); + + /* Generate a temporary with the same type as the ir_quadop_operation. + */ + ir_variable *const temp = + new(mem_ctx) ir_variable(expr->type, "vecop_tmp", ir_var_temporary); + + this->base_ir->insert_before(temp); + + /* Counter of the number of components collected so far. + */ + unsigned assigned; + + /* Write-mask in the destination that receives counted by 'assigned'. + */ + unsigned write_mask; + + + /* Generate upto four assignments to that variable. Try to group component + * assignments together: + * + * - All constant components can be assigned at once. + * - All assigments of components from a single variable with the same + * unary operator can be assigned at once. + */ + ir_constant_data d = { { 0 } }; + + assigned = 0; + write_mask = 0; + for (unsigned i = 0; i < expr->type->vector_elements; i++) { + const ir_constant *const c = expr->operands[i]->as_constant(); + + if (c == NULL) + continue; + + switch (expr->type->base_type) { + case GLSL_TYPE_UINT: d.u[assigned] = c->value.u[0]; break; + case GLSL_TYPE_INT: d.i[assigned] = c->value.i[0]; break; + case GLSL_TYPE_FLOAT: d.f[assigned] = c->value.f[0]; break; + case GLSL_TYPE_BOOL: d.b[assigned] = c->value.b[0]; break; + default: assert(!"Should not get here."); break; + } + + write_mask |= (1U << i); + assigned++; + } + + assert((write_mask == 0) == (assigned == 0)); + + /* If there were constant values, generate an assignment. + */ + if (assigned > 0) { + ir_constant *const c = + new(mem_ctx) ir_constant(glsl_type::get_instance(expr->type->base_type, + assigned, 0), + &d); + ir_dereference *const lhs = new(mem_ctx) ir_dereference_variable(temp); + ir_assignment *const assign = + new(mem_ctx) ir_assignment(lhs, c, NULL, write_mask); + + this->base_ir->insert_before(assign); + } + + /* FINISHME: This should try to coalesce assignments. + */ + for (unsigned i = 0; i < expr->type->vector_elements; i++) { + if (expr->operands[i]->ir_type == ir_type_constant) + continue; + + ir_dereference *const lhs = new(mem_ctx) ir_dereference_variable(temp); + ir_assignment *const assign = + new(mem_ctx) ir_assignment(lhs, expr->operands[i], NULL, (1U << i)); + + this->base_ir->insert_before(assign); + assigned++; + } + + assert(assigned == expr->type->vector_elements); + + *rvalue = new(mem_ctx) ir_dereference_variable(temp); + this->progress = true; +} + +bool +lower_quadop_vector(exec_list *instructions, bool dont_lower_swz) +{ + lower_vector_visitor v; + + v.dont_lower_swz = dont_lower_swz; + visit_list_elements(&v, instructions); + + return v.progress; +} |