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 #pragma once 26 27 #include "util/compiler.h" 28 #include "util/glheader.h" 29 #include "util/macros.h" 30 #include "util/rounding.h" 31 #include "util/u_math.h" 32 33 namespace elk { 34 /** 35 * Simple allocator used to keep track of virtual GRFs. 36 */ 37 class simple_allocator { 38 public: simple_allocator()39 simple_allocator() : 40 sizes(NULL), offsets(NULL), count(0), total_size(0), capacity(0) 41 { 42 } 43 44 simple_allocator(const simple_allocator &) = delete; 45 ~simple_allocator()46 ~simple_allocator() 47 { 48 free(offsets); 49 free(sizes); 50 } 51 52 simple_allocator & operator=(const simple_allocator &) = delete; 53 54 unsigned allocate(unsigned size)55 allocate(unsigned size) 56 { 57 assert(size > 0); 58 if (capacity <= count) { 59 capacity = MAX2(16, capacity * 2); 60 sizes = (unsigned *)realloc(sizes, capacity * sizeof(unsigned)); 61 offsets = (unsigned *)realloc(offsets, capacity * sizeof(unsigned)); 62 } 63 64 sizes[count] = size; 65 offsets[count] = total_size; 66 total_size += size; 67 68 return count++; 69 } 70 71 /** 72 * Array of sizes for each allocation. The allocation unit is up to the 73 * back-end, but it's expected to be one scalar value in the FS back-end 74 * and one vec4 in the VEC4 back-end. 75 */ 76 unsigned *sizes; 77 78 /** 79 * Array of offsets from the start of the VGRF space in allocation 80 * units. 81 */ 82 unsigned *offsets; 83 84 /** Total number of VGRFs allocated. */ 85 unsigned count; 86 87 /** Cumulative size in allocation units. */ 88 unsigned total_size; 89 90 private: 91 unsigned capacity; 92 }; 93 } 94