head	1.2;
access;
symbols
	netbsd-8-3-RELEASE:1.1.1.1
	netbsd-9-4-RELEASE:1.1.1.1
	netbsd-9-3-RELEASE:1.1.1.1
	netbsd-9-2-RELEASE:1.1.1.1
	netbsd-9-1-RELEASE:1.1.1.1
	netbsd-8-2-RELEASE:1.1.1.1
	netbsd-9-0-RELEASE:1.1.1.1
	netbsd-9-0-RC2:1.1.1.1
	netbsd-9-0-RC1:1.1.1.1
	netbsd-9:1.1.1.1.0.6
	netbsd-9-base:1.1.1.1
	netbsd-8-1-RELEASE:1.1.1.1
	netbsd-8-1-RC1:1.1.1.1
	netbsd-7-2-RELEASE:1.1.1.1.2.2
	netbsd-8-0-RELEASE:1.1.1.1
	netbsd-8-0-RC2:1.1.1.1
	netbsd-8-0-RC1:1.1.1.1
	netbsd-7-1-2-RELEASE:1.1.1.1.2.2
	netbsd-7-1-1-RELEASE:1.1.1.1.2.2
	netbsd-8:1.1.1.1.0.4
	netbsd-8-base:1.1.1.1
	netbsd-7-1:1.1.1.1.2.2.0.4
	netbsd-7-1-RELEASE:1.1.1.1.2.2
	netbsd-7-1-RC2:1.1.1.1.2.2
	netbsd-7-1-RC1:1.1.1.1.2.2
	netbsd-7-0-2-RELEASE:1.1.1.1.2.2
	netbsd-7-0-1-RELEASE:1.1.1.1.2.2
	netbsd-7-0:1.1.1.1.2.2.0.2
	netbsd-7-0-RELEASE:1.1.1.1.2.2
	netbsd-7-0-RC3:1.1.1.1.2.2
	netbsd-7-0-RC2:1.1.1.1.2.2
	netbsd-7-0-RC1:1.1.1.1.2.2
	netbsd-7:1.1.1.1.0.2
	MesaLib-7-11-2:1.1.1.1
	xorg:1.1.1;
locks; strict;
comment	@// @;


1.2
date	2021.07.11.01.13.56;	author mrg;	state dead;
branches;
next	1.1;
commitid	c76nQ9XgeygSuv0D;

1.1
date	2015.01.05.02.40.57;	author mrg;	state Exp;
branches
	1.1.1.1;
next	;
commitid	kCK5W1nEEE3zrM4y;

1.1.1.1
date	2015.01.05.02.40.57;	author mrg;	state Exp;
branches
	1.1.1.1.2.1;
next	;
commitid	kCK5W1nEEE3zrM4y;

1.1.1.1.2.1
date	2015.01.05.02.40.57;	author snj;	state dead;
branches;
next	1.1.1.1.2.2;
commitid	rxZCYAOMk9cXe8cy;

1.1.1.1.2.2
date	2015.03.03.07.44.45;	author snj;	state Exp;
branches;
next	;
commitid	rxZCYAOMk9cXe8cy;


desc
@@


1.2
log
@remove dead mesa7 dist.
@
text
@/*
 * 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_mat_op_to_vec.cpp
 *
 * Breaks matrix operation expressions down to a series of vector operations.
 *
 * Generally this is how we have to codegen matrix operations for a
 * GPU, so this gives us the chance to constant fold operations on a
 * column or row.
 */

#include "ir.h"
#include "ir_expression_flattening.h"
#include "glsl_types.h"

class ir_mat_op_to_vec_visitor : public ir_hierarchical_visitor {
public:
   ir_mat_op_to_vec_visitor()
   {
      this->made_progress = false;
      this->mem_ctx = NULL;
   }

   ir_visitor_status visit_leave(ir_assignment *);

   ir_dereference *get_column(ir_variable *var, int col);
   ir_rvalue *get_element(ir_variable *var, int col, int row);

   void do_mul_mat_mat(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_mat_vec(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_vec_mat(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_mat_scalar(ir_variable *result_var,
			  ir_variable *a_var, ir_variable *b_var);
   void do_equal_mat_mat(ir_variable *result_var, ir_variable *a_var,
			 ir_variable *b_var, bool test_equal);

   void *mem_ctx;
   bool made_progress;
};

static bool
mat_op_to_vec_predicate(ir_instruction *ir)
{
   ir_expression *expr = ir->as_expression();
   unsigned int i;

   if (!expr)
      return false;

   for (i = 0; i < expr->get_num_operands(); i++) {
      if (expr->operands[i]->type->is_matrix())
	 return true;
   }

   return false;
}

bool
do_mat_op_to_vec(exec_list *instructions)
{
   ir_mat_op_to_vec_visitor v;

   /* Pull out any matrix expression to a separate assignment to a
    * temp.  This will make our handling of the breakdown to
    * operations on the matrix's vector components much easier.
    */
   do_expression_flattening(instructions, mat_op_to_vec_predicate);

   visit_list_elements(&v, instructions);

   return v.made_progress;
}

ir_rvalue *
ir_mat_op_to_vec_visitor::get_element(ir_variable *var, int col, int row)
{
   ir_dereference *deref;

   deref = new(mem_ctx) ir_dereference_variable(var);

   if (var->type->is_matrix()) {
      deref = new(mem_ctx) ir_dereference_array(var,
						new(mem_ctx) ir_constant(col));
   } else {
      assert(col == 0);
   }

   return new(mem_ctx) ir_swizzle(deref, row, 0, 0, 0, 1);
}

ir_dereference *
ir_mat_op_to_vec_visitor::get_column(ir_variable *var, int row)
{
   ir_dereference *deref;

   if (!var->type->is_matrix()) {
      deref = new(mem_ctx) ir_dereference_variable(var);
   } else {
      deref = new(mem_ctx) ir_dereference_variable(var);
      deref = new(mem_ctx) ir_dereference_array(deref,
						new(mem_ctx) ir_constant(row));
   }

   return deref;
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_mat(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int b_col, i;
   ir_assignment *assign;
   ir_expression *expr;

   for (b_col = 0; b_col < b_var->type->matrix_columns; b_col++) {
      ir_rvalue *a = get_column(a_var, 0);
      ir_rvalue *b = get_element(b_var, b_col, 0);

      /* first column */
      expr = new(mem_ctx) ir_expression(ir_binop_mul,
					a->type,
					a,
					b);

      /* following columns */
      for (i = 1; i < a_var->type->matrix_columns; i++) {
	 ir_expression *mul_expr;

	 a = get_column(a_var, i);
	 b = get_element(b_var, b_col, i);

	 mul_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					       a->type,
					       a,
					       b);
	 expr = new(mem_ctx) ir_expression(ir_binop_add,
					   a->type,
					   expr,
					   mul_expr);
      }

      ir_rvalue *result = get_column(result_var, b_col);
      assign = new(mem_ctx) ir_assignment(result,
					  expr,
					  NULL);
      base_ir->insert_before(assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_vec(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int i;
   ir_rvalue *a = get_column(a_var, 0);
   ir_rvalue *b = get_element(b_var, 0, 0);
   ir_assignment *assign;
   ir_expression *expr;

   /* first column */
   expr = new(mem_ctx) ir_expression(ir_binop_mul,
				     result_var->type,
				     a,
				     b);

   /* following columns */
   for (i = 1; i < a_var->type->matrix_columns; i++) {
      ir_expression *mul_expr;

      a = get_column(a_var, i);
      b = get_element(b_var, 0, i);

      mul_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					    result_var->type,
					    a,
					    b);
      expr = new(mem_ctx) ir_expression(ir_binop_add,
					result_var->type,
					expr,
					mul_expr);
   }

   ir_rvalue *result = new(mem_ctx) ir_dereference_variable(result_var);
   assign = new(mem_ctx) ir_assignment(result,
				       expr,
				       NULL);
   base_ir->insert_before(assign);
}

void
ir_mat_op_to_vec_visitor::do_mul_vec_mat(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int i;

   for (i = 0; i < b_var->type->matrix_columns; i++) {
      ir_rvalue *a = new(mem_ctx) ir_dereference_variable(a_var);
      ir_rvalue *b = get_column(b_var, i);
      ir_rvalue *result;
      ir_expression *column_expr;
      ir_assignment *column_assign;

      result = new(mem_ctx) ir_dereference_variable(result_var);
      result = new(mem_ctx) ir_swizzle(result, i, 0, 0, 0, 1);

      column_expr = new(mem_ctx) ir_expression(ir_binop_dot,
					       result->type,
					       a,
					       b);

      column_assign = new(mem_ctx) ir_assignment(result,
						 column_expr,
						 NULL);
      base_ir->insert_before(column_assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_scalar(ir_variable *result_var,
					    ir_variable *a_var,
					    ir_variable *b_var)
{
   int i;

   for (i = 0; i < a_var->type->matrix_columns; i++) {
      ir_rvalue *a = get_column(a_var, i);
      ir_rvalue *b = new(mem_ctx) ir_dereference_variable(b_var);
      ir_rvalue *result = get_column(result_var, i);
      ir_expression *column_expr;
      ir_assignment *column_assign;

      column_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					       result->type,
					       a,
					       b);

      column_assign = new(mem_ctx) ir_assignment(result,
						 column_expr,
						 NULL);
      base_ir->insert_before(column_assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_equal_mat_mat(ir_variable *result_var,
					   ir_variable *a_var,
					   ir_variable *b_var,
					   bool test_equal)
{
   /* This essentially implements the following GLSL:
    *
    * bool equal(mat4 a, mat4 b)
    * {
    *   return !any(bvec4(a[0] != b[0],
    *                     a[1] != b[1],
    *                     a[2] != b[2],
    *                     a[3] != b[3]);
    * }
    *
    * bool nequal(mat4 a, mat4 b)
    * {
    *   return any(bvec4(a[0] != b[0],
    *                    a[1] != b[1],
    *                    a[2] != b[2],
    *                    a[3] != b[3]);
    * }
    */
   const unsigned columns = a_var->type->matrix_columns;
   const glsl_type *const bvec_type =
      glsl_type::get_instance(GLSL_TYPE_BOOL, columns, 1);

   ir_variable *const tmp_bvec =
      new(this->mem_ctx) ir_variable(bvec_type, "mat_cmp_bvec",
				     ir_var_temporary);
   this->base_ir->insert_before(tmp_bvec);

   for (unsigned i = 0; i < columns; i++) {
      ir_dereference *const op0 = get_column(a_var, i);
      ir_dereference *const op1 = get_column(b_var, i);

      ir_expression *const cmp =
	 new(this->mem_ctx) ir_expression(ir_binop_any_nequal,
					  glsl_type::bool_type, op0, op1);

      ir_dereference *const lhs =
	 new(this->mem_ctx) ir_dereference_variable(tmp_bvec);

      ir_assignment *const assign =
	 new(this->mem_ctx) ir_assignment(lhs, cmp, NULL, (1U << i));

      this->base_ir->insert_before(assign);
   }

   ir_rvalue *const val =
      new(this->mem_ctx) ir_dereference_variable(tmp_bvec);

   ir_expression *any =
      new(this->mem_ctx) ir_expression(ir_unop_any, glsl_type::bool_type,
				       val, NULL);

   if (test_equal)
      any = new(this->mem_ctx) ir_expression(ir_unop_logic_not,
					     glsl_type::bool_type,
					     any, NULL);

   ir_rvalue *const result =
      new(this->mem_ctx) ir_dereference_variable(result_var);

   ir_assignment *const assign =
	 new(mem_ctx) ir_assignment(result, any, NULL);
   base_ir->insert_before(assign);
}

static bool
has_matrix_operand(const ir_expression *expr, unsigned &columns)
{
   for (unsigned i = 0; i < expr->get_num_operands(); i++) {
      if (expr->operands[i]->type->is_matrix()) {
	 columns = expr->operands[i]->type->matrix_columns;
	 return true;
      }
   }

   return false;
}


ir_visitor_status
ir_mat_op_to_vec_visitor::visit_leave(ir_assignment *orig_assign)
{
   ir_expression *orig_expr = orig_assign->rhs->as_expression();
   unsigned int i, matrix_columns = 1;
   ir_variable *op_var[2];

   if (!orig_expr)
      return visit_continue;

   if (!has_matrix_operand(orig_expr, matrix_columns))
      return visit_continue;

   assert(orig_expr->get_num_operands() <= 2);

   mem_ctx = ralloc_parent(orig_assign);

   ir_dereference_variable *lhs_deref =
      orig_assign->lhs->as_dereference_variable();
   assert(lhs_deref);

   ir_variable *result_var = lhs_deref->var;

   /* Store the expression operands in temps so we can use them
    * multiple times.
    */
   for (i = 0; i < orig_expr->get_num_operands(); i++) {
      ir_assignment *assign;

      op_var[i] = new(mem_ctx) ir_variable(orig_expr->operands[i]->type,
					   "mat_op_to_vec",
					   ir_var_temporary);
      base_ir->insert_before(op_var[i]);

      lhs_deref = new(mem_ctx) ir_dereference_variable(op_var[i]);
      assign = new(mem_ctx) ir_assignment(lhs_deref,
					  orig_expr->operands[i],
					  NULL);
      base_ir->insert_before(assign);
   }

   /* OK, time to break down this matrix operation. */
   switch (orig_expr->operation) {
   case ir_unop_neg: {
      const unsigned mask = (1U << result_var->type->vector_elements) - 1;

      /* Apply the operation to each column.*/
      for (i = 0; i < matrix_columns; i++) {
	 ir_rvalue *op0 = get_column(op_var[0], i);
	 ir_dereference *result = get_column(result_var, i);
	 ir_expression *column_expr;
	 ir_assignment *column_assign;

	 column_expr = new(mem_ctx) ir_expression(orig_expr->operation,
						  result->type,
						  op0,
						  NULL);

	 column_assign = new(mem_ctx) ir_assignment(result,
						    column_expr,
						    NULL,
						    mask);
	 assert(column_assign->write_mask != 0);
	 base_ir->insert_before(column_assign);
      }
      break;
   }
   case ir_binop_add:
   case ir_binop_sub:
   case ir_binop_div:
   case ir_binop_mod: {
      const unsigned mask = (1U << result_var->type->vector_elements) - 1;

      /* For most operations, the matrix version is just going
       * column-wise through and applying the operation to each column
       * if available.
       */
      for (i = 0; i < matrix_columns; i++) {
	 ir_rvalue *op0 = get_column(op_var[0], i);
	 ir_rvalue *op1 = get_column(op_var[1], i);
	 ir_dereference *result = get_column(result_var, i);
	 ir_expression *column_expr;
	 ir_assignment *column_assign;

	 column_expr = new(mem_ctx) ir_expression(orig_expr->operation,
						  result->type,
						  op0,
						  op1);

	 column_assign = new(mem_ctx) ir_assignment(result,
						    column_expr,
						    NULL,
						    mask);
	 assert(column_assign->write_mask != 0);
	 base_ir->insert_before(column_assign);
      }
      break;
   }
   case ir_binop_mul:
      if (op_var[0]->type->is_matrix()) {
	 if (op_var[1]->type->is_matrix()) {
	    do_mul_mat_mat(result_var, op_var[0], op_var[1]);
	 } else if (op_var[1]->type->is_vector()) {
	    do_mul_mat_vec(result_var, op_var[0], op_var[1]);
	 } else {
	    assert(op_var[1]->type->is_scalar());
	    do_mul_mat_scalar(result_var, op_var[0], op_var[1]);
	 }
      } else {
	 assert(op_var[1]->type->is_matrix());
	 if (op_var[0]->type->is_vector()) {
	    do_mul_vec_mat(result_var, op_var[0], op_var[1]);
	 } else {
	    assert(op_var[0]->type->is_scalar());
	    do_mul_mat_scalar(result_var, op_var[1], op_var[0]);
	 }
      }
      break;

   case ir_binop_all_equal:
   case ir_binop_any_nequal:
      do_equal_mat_mat(result_var, op_var[1], op_var[0],
		       (orig_expr->operation == ir_binop_all_equal));
      break;

   default:
      printf("FINISHME: Handle matrix operation for %s\n",
	     orig_expr->operator_string());
      abort();
   }
   orig_assign->remove();
   this->made_progress = true;

   return visit_continue;
}
@


1.1
log
@Initial revision
@
text
@@


1.1.1.1
log
@re-import parts of the Mesa 7.11.2 code for the r300 DRI driver (which
is disabled in our Mesa 10.x due to LLVM issues.)
@
text
@@


1.1.1.1.2.1
log
@file lower_mat_op_to_vec.cpp was added on branch netbsd-7 on 2015-03-03 07:44:45 +0000
@
text
@d1 490
@


1.1.1.1.2.2
log
@Pull up following revision(s) (requested by mrg in ticket #559):
	xsrc/external/mit/MesaLib7/dist/include/GL/gl.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/gl_mangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glext.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glfbdev.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glu.h: 1.2
	xsrc/external/mit/MesaLib7/dist/include/GL/glu_mangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glx.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glx_mangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/glxext.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/internal/dri_interface.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/internal/sarea.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/mesa_wgl.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/osmesa.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/vms_x_fix.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/wglext.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GL/wmesa.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES/egl.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES/gl.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES/glext.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES/glplatform.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES2/gl2.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES2/gl2ext.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/GLES2/gl2platform.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/KHR/khrplatform.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/c99/inttypes.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/c99/stdbool.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/c99/stdint.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/i810_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/i915_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/i965_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/pci_id_driver_map.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/r200_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/r300_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/r600_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/include/pci_ids/radeon_pci_ids.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/gallium/auxiliary/util/dbghelp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/gallium/auxiliary/util/u_atomic.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/gallium/auxiliary/util/u_bitmask.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/gallium/auxiliary/util/u_bitmask.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/gallium/auxiliary/util/u_blit.c: 1.1.1.1
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	xsrc/external/mit/MesaLib7/dist/src/mesa/state_tracker/st_texture.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/state_tracker/st_texture.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/descrip.mms: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aaline.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aaline.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aalinetemp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aatriangle.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aatriangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_aatritemp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_accum.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_accum.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_alpha.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_alpha.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_atifragshader.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_atifragshader.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_bitmap.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_blend.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_blend.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_blit.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_clear.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_context.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_context.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_copypix.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_depth.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_depth.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_drawpix.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_feedback.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_feedback.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_fog.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_fog.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_fragprog.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_fragprog.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_lines.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_lines.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_linetemp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_logic.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_logic.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_masking.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_masking.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_points.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_points.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_readpix.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_span.c: 1.2
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_span.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_spantemp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_stencil.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_stencil.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_texcombine.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_texcombine.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_texfilter.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_texfilter.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_texrender.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_triangle.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_triangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_tritemp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_zoom.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/s_zoom.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast/swrast.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/descrip.mms: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_context.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_context.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_triangle.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_triangle.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_tritmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/ss_vb.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/swrast_setup/swrast_setup.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/descrip.mms: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_context.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_context.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_draw.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_pipeline.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_pipeline.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_rasterpos.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_cliptmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_fog.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_light.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_lighttmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_normals.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_points.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_program.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_render.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_rendertmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_texgen.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_texmat.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vb_vertex.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vertex.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vertex.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vertex_generic.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vertex_sse.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vp_build.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/t_vp_build.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl/tnl.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/NOTES.imm: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_capi.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_napi.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_primtmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_tapi.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_vapi.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_vb.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/imm/t_dd_imm_vbtmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_dmatmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_dmatmp2.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_rendertmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_triemit.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_tritmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_unfilled.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_vb.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_vbtmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/tnl_dd/t_dd_vertex.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/descrip.mms: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_attrib.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_attrib_tmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_context.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_context.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec_api.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec_array.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec_draw.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_exec_eval.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_rebase.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_save.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_save.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_save_api.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_save_draw.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_save_loopback.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_split.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_split.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_split_copy.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/vbo/vbo_split_inplace.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86-64/Makefile: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86-64/x86-64.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86-64/x86-64.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86-64/xform4.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow_normal.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow_xform1.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow_xform2.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow_xform3.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/3dnow_xform4.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/Makefile: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/assyntax.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/clip_args.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/common_x86.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/common_x86_asm.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/common_x86_asm.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/common_x86_features.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/gen_matypes.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/mmx.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/mmx_blend.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/mmx_blendtmp.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/norm_args.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/read_rgba_span_x86.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/read_rgba_span_x86.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/rtasm/x86sse.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/rtasm/x86sse.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse_normal.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse_xform1.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse_xform2.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse_xform3.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/sse_xform4.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_cliptest.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_xform.c: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_xform.h: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_xform2.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_xform3.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/x86_xform4.S: 1.1.1.1
	xsrc/external/mit/MesaLib7/dist/src/mesa/x86/xform_args.h: 1.1.1.1
re-import parts of the Mesa 7.11.2 code for the r300 DRI driver (which
is disabled in our Mesa 10.x due to LLVM issues.)
@
text
@a0 490
/*
 * 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_mat_op_to_vec.cpp
 *
 * Breaks matrix operation expressions down to a series of vector operations.
 *
 * Generally this is how we have to codegen matrix operations for a
 * GPU, so this gives us the chance to constant fold operations on a
 * column or row.
 */

#include "ir.h"
#include "ir_expression_flattening.h"
#include "glsl_types.h"

class ir_mat_op_to_vec_visitor : public ir_hierarchical_visitor {
public:
   ir_mat_op_to_vec_visitor()
   {
      this->made_progress = false;
      this->mem_ctx = NULL;
   }

   ir_visitor_status visit_leave(ir_assignment *);

   ir_dereference *get_column(ir_variable *var, int col);
   ir_rvalue *get_element(ir_variable *var, int col, int row);

   void do_mul_mat_mat(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_mat_vec(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_vec_mat(ir_variable *result_var,
		       ir_variable *a_var, ir_variable *b_var);
   void do_mul_mat_scalar(ir_variable *result_var,
			  ir_variable *a_var, ir_variable *b_var);
   void do_equal_mat_mat(ir_variable *result_var, ir_variable *a_var,
			 ir_variable *b_var, bool test_equal);

   void *mem_ctx;
   bool made_progress;
};

static bool
mat_op_to_vec_predicate(ir_instruction *ir)
{
   ir_expression *expr = ir->as_expression();
   unsigned int i;

   if (!expr)
      return false;

   for (i = 0; i < expr->get_num_operands(); i++) {
      if (expr->operands[i]->type->is_matrix())
	 return true;
   }

   return false;
}

bool
do_mat_op_to_vec(exec_list *instructions)
{
   ir_mat_op_to_vec_visitor v;

   /* Pull out any matrix expression to a separate assignment to a
    * temp.  This will make our handling of the breakdown to
    * operations on the matrix's vector components much easier.
    */
   do_expression_flattening(instructions, mat_op_to_vec_predicate);

   visit_list_elements(&v, instructions);

   return v.made_progress;
}

ir_rvalue *
ir_mat_op_to_vec_visitor::get_element(ir_variable *var, int col, int row)
{
   ir_dereference *deref;

   deref = new(mem_ctx) ir_dereference_variable(var);

   if (var->type->is_matrix()) {
      deref = new(mem_ctx) ir_dereference_array(var,
						new(mem_ctx) ir_constant(col));
   } else {
      assert(col == 0);
   }

   return new(mem_ctx) ir_swizzle(deref, row, 0, 0, 0, 1);
}

ir_dereference *
ir_mat_op_to_vec_visitor::get_column(ir_variable *var, int row)
{
   ir_dereference *deref;

   if (!var->type->is_matrix()) {
      deref = new(mem_ctx) ir_dereference_variable(var);
   } else {
      deref = new(mem_ctx) ir_dereference_variable(var);
      deref = new(mem_ctx) ir_dereference_array(deref,
						new(mem_ctx) ir_constant(row));
   }

   return deref;
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_mat(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int b_col, i;
   ir_assignment *assign;
   ir_expression *expr;

   for (b_col = 0; b_col < b_var->type->matrix_columns; b_col++) {
      ir_rvalue *a = get_column(a_var, 0);
      ir_rvalue *b = get_element(b_var, b_col, 0);

      /* first column */
      expr = new(mem_ctx) ir_expression(ir_binop_mul,
					a->type,
					a,
					b);

      /* following columns */
      for (i = 1; i < a_var->type->matrix_columns; i++) {
	 ir_expression *mul_expr;

	 a = get_column(a_var, i);
	 b = get_element(b_var, b_col, i);

	 mul_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					       a->type,
					       a,
					       b);
	 expr = new(mem_ctx) ir_expression(ir_binop_add,
					   a->type,
					   expr,
					   mul_expr);
      }

      ir_rvalue *result = get_column(result_var, b_col);
      assign = new(mem_ctx) ir_assignment(result,
					  expr,
					  NULL);
      base_ir->insert_before(assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_vec(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int i;
   ir_rvalue *a = get_column(a_var, 0);
   ir_rvalue *b = get_element(b_var, 0, 0);
   ir_assignment *assign;
   ir_expression *expr;

   /* first column */
   expr = new(mem_ctx) ir_expression(ir_binop_mul,
				     result_var->type,
				     a,
				     b);

   /* following columns */
   for (i = 1; i < a_var->type->matrix_columns; i++) {
      ir_expression *mul_expr;

      a = get_column(a_var, i);
      b = get_element(b_var, 0, i);

      mul_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					    result_var->type,
					    a,
					    b);
      expr = new(mem_ctx) ir_expression(ir_binop_add,
					result_var->type,
					expr,
					mul_expr);
   }

   ir_rvalue *result = new(mem_ctx) ir_dereference_variable(result_var);
   assign = new(mem_ctx) ir_assignment(result,
				       expr,
				       NULL);
   base_ir->insert_before(assign);
}

void
ir_mat_op_to_vec_visitor::do_mul_vec_mat(ir_variable *result_var,
					 ir_variable *a_var,
					 ir_variable *b_var)
{
   int i;

   for (i = 0; i < b_var->type->matrix_columns; i++) {
      ir_rvalue *a = new(mem_ctx) ir_dereference_variable(a_var);
      ir_rvalue *b = get_column(b_var, i);
      ir_rvalue *result;
      ir_expression *column_expr;
      ir_assignment *column_assign;

      result = new(mem_ctx) ir_dereference_variable(result_var);
      result = new(mem_ctx) ir_swizzle(result, i, 0, 0, 0, 1);

      column_expr = new(mem_ctx) ir_expression(ir_binop_dot,
					       result->type,
					       a,
					       b);

      column_assign = new(mem_ctx) ir_assignment(result,
						 column_expr,
						 NULL);
      base_ir->insert_before(column_assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_mul_mat_scalar(ir_variable *result_var,
					    ir_variable *a_var,
					    ir_variable *b_var)
{
   int i;

   for (i = 0; i < a_var->type->matrix_columns; i++) {
      ir_rvalue *a = get_column(a_var, i);
      ir_rvalue *b = new(mem_ctx) ir_dereference_variable(b_var);
      ir_rvalue *result = get_column(result_var, i);
      ir_expression *column_expr;
      ir_assignment *column_assign;

      column_expr = new(mem_ctx) ir_expression(ir_binop_mul,
					       result->type,
					       a,
					       b);

      column_assign = new(mem_ctx) ir_assignment(result,
						 column_expr,
						 NULL);
      base_ir->insert_before(column_assign);
   }
}

void
ir_mat_op_to_vec_visitor::do_equal_mat_mat(ir_variable *result_var,
					   ir_variable *a_var,
					   ir_variable *b_var,
					   bool test_equal)
{
   /* This essentially implements the following GLSL:
    *
    * bool equal(mat4 a, mat4 b)
    * {
    *   return !any(bvec4(a[0] != b[0],
    *                     a[1] != b[1],
    *                     a[2] != b[2],
    *                     a[3] != b[3]);
    * }
    *
    * bool nequal(mat4 a, mat4 b)
    * {
    *   return any(bvec4(a[0] != b[0],
    *                    a[1] != b[1],
    *                    a[2] != b[2],
    *                    a[3] != b[3]);
    * }
    */
   const unsigned columns = a_var->type->matrix_columns;
   const glsl_type *const bvec_type =
      glsl_type::get_instance(GLSL_TYPE_BOOL, columns, 1);

   ir_variable *const tmp_bvec =
      new(this->mem_ctx) ir_variable(bvec_type, "mat_cmp_bvec",
				     ir_var_temporary);
   this->base_ir->insert_before(tmp_bvec);

   for (unsigned i = 0; i < columns; i++) {
      ir_dereference *const op0 = get_column(a_var, i);
      ir_dereference *const op1 = get_column(b_var, i);

      ir_expression *const cmp =
	 new(this->mem_ctx) ir_expression(ir_binop_any_nequal,
					  glsl_type::bool_type, op0, op1);

      ir_dereference *const lhs =
	 new(this->mem_ctx) ir_dereference_variable(tmp_bvec);

      ir_assignment *const assign =
	 new(this->mem_ctx) ir_assignment(lhs, cmp, NULL, (1U << i));

      this->base_ir->insert_before(assign);
   }

   ir_rvalue *const val =
      new(this->mem_ctx) ir_dereference_variable(tmp_bvec);

   ir_expression *any =
      new(this->mem_ctx) ir_expression(ir_unop_any, glsl_type::bool_type,
				       val, NULL);

   if (test_equal)
      any = new(this->mem_ctx) ir_expression(ir_unop_logic_not,
					     glsl_type::bool_type,
					     any, NULL);

   ir_rvalue *const result =
      new(this->mem_ctx) ir_dereference_variable(result_var);

   ir_assignment *const assign =
	 new(mem_ctx) ir_assignment(result, any, NULL);
   base_ir->insert_before(assign);
}

static bool
has_matrix_operand(const ir_expression *expr, unsigned &columns)
{
   for (unsigned i = 0; i < expr->get_num_operands(); i++) {
      if (expr->operands[i]->type->is_matrix()) {
	 columns = expr->operands[i]->type->matrix_columns;
	 return true;
      }
   }

   return false;
}


ir_visitor_status
ir_mat_op_to_vec_visitor::visit_leave(ir_assignment *orig_assign)
{
   ir_expression *orig_expr = orig_assign->rhs->as_expression();
   unsigned int i, matrix_columns = 1;
   ir_variable *op_var[2];

   if (!orig_expr)
      return visit_continue;

   if (!has_matrix_operand(orig_expr, matrix_columns))
      return visit_continue;

   assert(orig_expr->get_num_operands() <= 2);

   mem_ctx = ralloc_parent(orig_assign);

   ir_dereference_variable *lhs_deref =
      orig_assign->lhs->as_dereference_variable();
   assert(lhs_deref);

   ir_variable *result_var = lhs_deref->var;

   /* Store the expression operands in temps so we can use them
    * multiple times.
    */
   for (i = 0; i < orig_expr->get_num_operands(); i++) {
      ir_assignment *assign;

      op_var[i] = new(mem_ctx) ir_variable(orig_expr->operands[i]->type,
					   "mat_op_to_vec",
					   ir_var_temporary);
      base_ir->insert_before(op_var[i]);

      lhs_deref = new(mem_ctx) ir_dereference_variable(op_var[i]);
      assign = new(mem_ctx) ir_assignment(lhs_deref,
					  orig_expr->operands[i],
					  NULL);
      base_ir->insert_before(assign);
   }

   /* OK, time to break down this matrix operation. */
   switch (orig_expr->operation) {
   case ir_unop_neg: {
      const unsigned mask = (1U << result_var->type->vector_elements) - 1;

      /* Apply the operation to each column.*/
      for (i = 0; i < matrix_columns; i++) {
	 ir_rvalue *op0 = get_column(op_var[0], i);
	 ir_dereference *result = get_column(result_var, i);
	 ir_expression *column_expr;
	 ir_assignment *column_assign;

	 column_expr = new(mem_ctx) ir_expression(orig_expr->operation,
						  result->type,
						  op0,
						  NULL);

	 column_assign = new(mem_ctx) ir_assignment(result,
						    column_expr,
						    NULL,
						    mask);
	 assert(column_assign->write_mask != 0);
	 base_ir->insert_before(column_assign);
      }
      break;
   }
   case ir_binop_add:
   case ir_binop_sub:
   case ir_binop_div:
   case ir_binop_mod: {
      const unsigned mask = (1U << result_var->type->vector_elements) - 1;

      /* For most operations, the matrix version is just going
       * column-wise through and applying the operation to each column
       * if available.
       */
      for (i = 0; i < matrix_columns; i++) {
	 ir_rvalue *op0 = get_column(op_var[0], i);
	 ir_rvalue *op1 = get_column(op_var[1], i);
	 ir_dereference *result = get_column(result_var, i);
	 ir_expression *column_expr;
	 ir_assignment *column_assign;

	 column_expr = new(mem_ctx) ir_expression(orig_expr->operation,
						  result->type,
						  op0,
						  op1);

	 column_assign = new(mem_ctx) ir_assignment(result,
						    column_expr,
						    NULL,
						    mask);
	 assert(column_assign->write_mask != 0);
	 base_ir->insert_before(column_assign);
      }
      break;
   }
   case ir_binop_mul:
      if (op_var[0]->type->is_matrix()) {
	 if (op_var[1]->type->is_matrix()) {
	    do_mul_mat_mat(result_var, op_var[0], op_var[1]);
	 } else if (op_var[1]->type->is_vector()) {
	    do_mul_mat_vec(result_var, op_var[0], op_var[1]);
	 } else {
	    assert(op_var[1]->type->is_scalar());
	    do_mul_mat_scalar(result_var, op_var[0], op_var[1]);
	 }
      } else {
	 assert(op_var[1]->type->is_matrix());
	 if (op_var[0]->type->is_vector()) {
	    do_mul_vec_mat(result_var, op_var[0], op_var[1]);
	 } else {
	    assert(op_var[0]->type->is_scalar());
	    do_mul_mat_scalar(result_var, op_var[1], op_var[0]);
	 }
      }
      break;

   case ir_binop_all_equal:
   case ir_binop_any_nequal:
      do_equal_mat_mat(result_var, op_var[1], op_var[0],
		       (orig_expr->operation == ir_binop_all_equal));
      break;

   default:
      printf("FINISHME: Handle matrix operation for %s\n",
	     orig_expr->operator_string());
      abort();
   }
   orig_assign->remove();
   this->made_progress = true;

   return visit_continue;
}
@


