1/* -*- c++ -*- */
2/*
3 * Copyright © 2010-2014 Intel Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#ifndef BRW_IR_ALLOCATOR_H
26#define BRW_IR_ALLOCATOR_H
27
28#include "main/macros.h"
29
30namespace brw {
31   /**
32    * Simple allocator used to keep track of virtual GRFs.
33    */
34   class simple_allocator {
35   public:
36      simple_allocator() :
37         sizes(NULL), offsets(NULL), count(0), total_size(0), capacity(0)
38      {
39      }
40
41      ~simple_allocator()
42      {
43         free(offsets);
44         free(sizes);
45      }
46
47      unsigned
48      allocate(unsigned size)
49      {
50         if (capacity <= count) {
51            capacity = MAX2(16, capacity * 2);
52            sizes = (unsigned *)realloc(sizes, capacity * sizeof(unsigned));
53            offsets = (unsigned *)realloc(offsets, capacity * sizeof(unsigned));
54         }
55
56         sizes[count] = size;
57         offsets[count] = total_size;
58         total_size += size;
59
60         return count++;
61      }
62
63      /**
64       * Array of sizes for each allocation.  The allocation unit is up to the
65       * back-end, but it's expected to be one scalar value in the FS back-end
66       * and one vec4 in the VEC4 back-end.
67       */
68      unsigned *sizes;
69
70      /**
71       * Array of offsets from the start of the VGRF space in allocation
72       * units.
73       */
74      unsigned *offsets;
75
76      /** Total number of VGRFs allocated. */
77      unsigned count;
78
79      /** Cumulative size in allocation units. */
80      unsigned total_size;
81
82   private:
83      unsigned capacity;
84   };
85}
86
87#endif
88