summaryrefslogtreecommitdiffstats
path: root/ir_to_mesa.h
blob: ee776bd55fe5e603fdee0474b05de5d5ff3a1a0d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
/*
 * 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.
 */

#include "ir.h"
extern "C" {
#include "shader/prog_instruction.h"
};

/**
 * \file ir_to_mesa.h
 *
 * Translates the IR to Mesa IR if possible.
 */

/**
 * This struct is a corresponding struct to Mesa prog_src_register, with
 * wider fields.
 */
typedef struct ir_to_mesa_src_reg {
   int file; /**< PROGRAM_* from Mesa */
   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
   int swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
} ir_to_mesa_src_reg;

typedef struct ir_to_mesa_dst_reg {
   int file; /**< PROGRAM_* from Mesa */
   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
   int writemask; /**< Bitfield of WRITEMASK_[XYZW] */
} ir_to_mesa_dst_reg;

extern ir_to_mesa_src_reg ir_to_mesa_undef;

class ir_to_mesa_instruction : public exec_node {
public:
   enum prog_opcode op;
   ir_to_mesa_dst_reg dst_reg;
   ir_to_mesa_src_reg src_reg[3];
   /** Pointer to the ir source this tree came from for debugging */
   ir_instruction *ir;
};

struct mbtree {
   struct mbtree *left;
   struct mbtree *right;
   void *state;
   uint16_t op;
   class ir_to_mesa_visitor *v;

   /** Pointer to the ir source this tree came from for debugging */
   ir_instruction *ir;

   ir_to_mesa_dst_reg dst_reg;

   /**
    * This is the representation of this tree node's results as a
    * source register for its consumer.
    */
   ir_to_mesa_src_reg src_reg;
};

void do_ir_to_mesa(exec_list *instructions);

class temp_entry : public exec_node {
public:
   temp_entry(ir_variable *var, int file, int index)
      : file(file), index(index), var(var)
   {
      /* empty */
   }

   int file;
   int index;
   ir_variable *var; /* variable that maps to this, if any */
};

class ir_to_mesa_visitor : public ir_visitor {
public:
   ir_to_mesa_visitor();

   int next_temp;
   int next_constant;

   void get_temp(struct mbtree *tree, int size);

   void get_temp_for_var(ir_variable *var, struct mbtree *tree);

   struct mbtree *create_tree(int op,
			      ir_instruction *ir,
			      struct mbtree *left,
			      struct mbtree *right);

   /**
    * \name Visit methods
    *
    * As typical for the visitor pattern, there must be one \c visit method for
    * each concrete subclass of \c ir_instruction.  Virtual base classes within
    * the hierarchy should not have \c visit methods.
    */
   /*@{*/
   virtual void visit(ir_variable *);
   virtual void visit(ir_loop *);
   virtual void visit(ir_loop_jump *);
   virtual void visit(ir_function_signature *);
   virtual void visit(ir_function *);
   virtual void visit(ir_expression *);
   virtual void visit(ir_swizzle *);
   virtual void visit(ir_dereference_variable *);
   virtual void visit(ir_dereference_array *);
   virtual void visit(ir_dereference_record *);
   virtual void visit(ir_assignment *);
   virtual void visit(ir_constant *);
   virtual void visit(ir_call *);
   virtual void visit(ir_return *);
   virtual void visit(ir_texture *);
   virtual void visit(ir_if *);
   /*@}*/

   struct mbtree *result;

   /** List of temp_entry */
   exec_list variable_storage;

   /** List of ir_to_mesa_instruction */
   exec_list instructions;
};

ir_to_mesa_instruction *
ir_to_mesa_emit_op1(struct mbtree *tree, enum prog_opcode op);

ir_to_mesa_instruction *
ir_to_mesa_emit_op1_full(struct mbtree *tree, enum prog_opcode op,
			 ir_to_mesa_dst_reg dst,
			 ir_to_mesa_src_reg src0);

ir_to_mesa_instruction *
ir_to_mesa_emit_op2(struct mbtree *tree, enum prog_opcode op);

ir_to_mesa_instruction *
ir_to_mesa_emit_op2_full(struct mbtree *tree, enum prog_opcode op,
			 ir_to_mesa_dst_reg dst,
			 ir_to_mesa_src_reg src0,
			 ir_to_mesa_src_reg src1);

ir_to_mesa_instruction *
ir_to_mesa_emit_op3(struct mbtree *tree, enum prog_opcode op,
		    ir_to_mesa_dst_reg dst,
		    ir_to_mesa_src_reg src0,
		    ir_to_mesa_src_reg src1,
		    ir_to_mesa_src_reg src2);

void
ir_to_mesa_emit_scalar_op1(struct mbtree *tree, enum prog_opcode op,
			   ir_to_mesa_dst_reg dst,
			   ir_to_mesa_src_reg src0);

inline ir_to_mesa_dst_reg
ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg reg)
{
   ir_to_mesa_dst_reg dst_reg;

   dst_reg.file = reg.file;
   dst_reg.index = reg.index;
   dst_reg.writemask = WRITEMASK_XYZW;

   return dst_reg;
}