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 30 namespace 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
