src/glsl/ir_builder.h

   1 /*
   2  * Copyright © 2012 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "ir.h"
  25
  26 namespace ir_builder {
  27
  28 /**
  29  * This little class exists to let the helper expression generators
  30  * take either an ir_rvalue * or an ir_variable * to be automatically
  31  * dereferenced, while still providing compile-time type checking.
  32  *
  33  * You don't have to explicitly call the constructor -- C++ will see
  34  * that you passed an ir_variable, and silently call the
  35  * operand(ir_variable *var) constructor behind your back.
  36  */
  37 class operand {
  38 public:
  39    operand(ir_rvalue *val)
  40       : val(val)
  41    {
  42    }
  43
  44    operand(ir_variable *var)
  45    {
  46       void *mem_ctx = ralloc_parent(var);
  47       val = new(mem_ctx) ir_dereference_variable(var);
  48    }
  49
  50    ir_rvalue *val;
  51 };
  52
  53 /** Automatic generator for ir_dereference_variable on assignment LHS.
  54  *
  55  * \sa operand
  56  */
  57 class deref {
  58 public:
  59    deref(ir_dereference *val)
  60       : val(val)
  61    {
  62    }
  63
  64    deref(ir_variable *var)
  65    {
  66       void *mem_ctx = ralloc_parent(var);
  67       val = new(mem_ctx) ir_dereference_variable(var);
  68    }
  69
  70
  71    ir_dereference *val;
  72 };
  73
  74 class ir_factory {
  75 public:
  76    void emit(ir_instruction *ir);
  77    ir_variable *make_temp(const glsl_type *type, const char *name);
  78
  79    exec_list *instructions;
  80    void *mem_ctx;
  81 };
  82
  83 ir_assignment *assign(deref lhs, operand rhs);
  84 ir_assignment *assign(deref lhs, operand rhs, int writemask);
  85
  86 ir_expression *expr(ir_expression_operation op, operand a);
  87 ir_expression *expr(ir_expression_operation op, operand a, operand b);
  88 ir_expression *add(operand a, operand b);
  89 ir_expression *sub(operand a, operand b);
  90 ir_expression *mul(operand a, operand b);
  91 ir_expression *dot(operand a, operand b);
  92 ir_expression *saturate(operand a);
  93
  94 ir_swizzle *swizzle_xxxx(operand a);
  95 ir_swizzle *swizzle_yyyy(operand a);
  96 ir_swizzle *swizzle_zzzz(operand a);
  97 ir_swizzle *swizzle_wwww(operand a);
  98 ir_swizzle *swizzle_x(operand a);
  99 ir_swizzle *swizzle_y(operand a);
 100 ir_swizzle *swizzle_z(operand a);
 101 ir_swizzle *swizzle_w(operand a);
 102 ir_swizzle *swizzle_xy(operand a);
 103 ir_swizzle *swizzle_xyz(operand a);
 104 ir_swizzle *swizzle_xyzw(operand a);
 105
 106 } /* namespace ir_builder */