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
26namespace 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 */
37class operand {
38public:
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 */
57class deref {
58public:
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
74class ir_factory {
75public:
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
83ir_assignment *assign(deref lhs, operand rhs);
84ir_assignment *assign(deref lhs, operand rhs, int writemask);
85
86ir_expression *expr(ir_expression_operation op, operand a);
87ir_expression *expr(ir_expression_operation op, operand a, operand b);
88ir_expression *add(operand a, operand b);
89ir_expression *sub(operand a, operand b);
90ir_expression *mul(operand a, operand b);
91ir_expression *dot(operand a, operand b);
92ir_expression *saturate(operand a);
93
94/**
95 * Swizzle away later components, but preserve the ordering.
96 */
97ir_swizzle *swizzle_for_size(operand a, int components);
98
99ir_swizzle *swizzle_xxxx(operand a);
100ir_swizzle *swizzle_yyyy(operand a);
101ir_swizzle *swizzle_zzzz(operand a);
102ir_swizzle *swizzle_wwww(operand a);
103ir_swizzle *swizzle_x(operand a);
104ir_swizzle *swizzle_y(operand a);
105ir_swizzle *swizzle_z(operand a);
106ir_swizzle *swizzle_w(operand a);
107ir_swizzle *swizzle_xy(operand a);
108ir_swizzle *swizzle_xyz(operand a);
109ir_swizzle *swizzle_xyzw(operand a);
110
111} /* namespace ir_builder */
112