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/*
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 * Copyright © 2012 Intel Corporation
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the next
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 * paragraph) shall be included in all copies or substantial portions of the
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 * Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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 * IN THE SOFTWARE.
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 */
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#include "ir.h"
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namespace ir_builder {
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#ifndef WRITEMASK_X
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enum writemask {
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   WRITEMASK_X = 0x1,
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   WRITEMASK_Y = 0x2,
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   WRITEMASK_Z = 0x4,
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   WRITEMASK_W = 0x8,
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};
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#endif
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/**
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 * This little class exists to let the helper expression generators
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 * take either an ir_rvalue * or an ir_variable * to be automatically
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 * dereferenced, while still providing compile-time type checking.
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 *
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 * You don't have to explicitly call the constructor -- C++ will see
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 * that you passed an ir_variable, and silently call the
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 * operand(ir_variable *var) constructor behind your back.
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 */
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class operand {
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public:
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   operand(ir_rvalue *val)
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      : val(val)
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   {
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   }
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   operand(ir_variable *var)
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   {
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      void *mem_ctx = ralloc_parent(var);
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      val = new(mem_ctx) ir_dereference_variable(var);
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   }
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   ir_rvalue *val;
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};
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/** Automatic generator for ir_dereference_variable on assignment LHS.
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 *
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 * \sa operand
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 */
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class deref {
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public:
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   deref(ir_dereference *val)
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      : val(val)
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   {
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   }
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   deref(ir_variable *var)
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   {
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      void *mem_ctx = ralloc_parent(var);
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      val = new(mem_ctx) ir_dereference_variable(var);
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   }
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   ir_dereference *val;
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};
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class ir_factory {
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public:
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   ir_factory()
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      : instructions(NULL),
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        mem_ctx(NULL)
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   {
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      return;
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   }
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   void emit(ir_instruction *ir);
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   ir_variable *make_temp(const glsl_type *type, const char *name);
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   ir_constant*
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   constant(float f)
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   {
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      return new(mem_ctx) ir_constant(f);
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   }
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   ir_constant*
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   constant(int i)
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   {
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      return new(mem_ctx) ir_constant(i);
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   }
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   ir_constant*
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   constant(unsigned u)
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   {
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      return new(mem_ctx) ir_constant(u);
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   }
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   ir_constant*
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   constant(bool b)
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   {
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      return new(mem_ctx) ir_constant(b);
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   }
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   exec_list *instructions;
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   void *mem_ctx;
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};
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ir_assignment *assign(deref lhs, operand rhs);
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ir_assignment *assign(deref lhs, operand rhs, int writemask);
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ir_expression *expr(ir_expression_operation op, operand a);
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ir_expression *expr(ir_expression_operation op, operand a, operand b);
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ir_expression *add(operand a, operand b);
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ir_expression *sub(operand a, operand b);
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ir_expression *mul(operand a, operand b);
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ir_expression *div(operand a, operand b);
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ir_expression *round_even(operand a);
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ir_expression *dot(operand a, operand b);
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ir_expression *clamp(operand a, operand b, operand c);
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ir_expression *saturate(operand a);
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ir_expression *equal(operand a, operand b);
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ir_expression *less(operand a, operand b);
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ir_expression *greater(operand a, operand b);
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ir_expression *lequal(operand a, operand b);
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ir_expression *gequal(operand a, operand b);
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ir_expression *logic_not(operand a);
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ir_expression *logic_and(operand a, operand b);
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ir_expression *logic_or(operand a, operand b);
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ir_expression *bit_not(operand a);
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ir_expression *bit_or(operand a, operand b);
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ir_expression *bit_and(operand a, operand b);
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ir_expression *lshift(operand a, operand b);
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ir_expression *rshift(operand a, operand b);
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ir_expression *f2i(operand a);
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ir_expression *i2f(operand a);
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ir_expression *f2u(operand a);
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ir_expression *u2f(operand a);
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ir_expression *i2u(operand a);
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ir_expression *u2i(operand a);
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/**
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 * Swizzle away later components, but preserve the ordering.
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 */
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ir_swizzle *swizzle_for_size(operand a, unsigned components);
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ir_swizzle *swizzle_xxxx(operand a);
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ir_swizzle *swizzle_yyyy(operand a);
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ir_swizzle *swizzle_zzzz(operand a);
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ir_swizzle *swizzle_wwww(operand a);
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ir_swizzle *swizzle_x(operand a);
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ir_swizzle *swizzle_y(operand a);
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ir_swizzle *swizzle_z(operand a);
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ir_swizzle *swizzle_w(operand a);
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ir_swizzle *swizzle_xy(operand a);
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ir_swizzle *swizzle_xyz(operand a);
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ir_swizzle *swizzle_xyzw(operand a);
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ir_if *if_tree(operand condition,
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               ir_instruction *then_branch);
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ir_if *if_tree(operand condition,
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               ir_instruction *then_branch,
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               ir_instruction *else_branch);
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} /* namespace ir_builder */