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 ELK_IR_ALLOCATOR_H 26 #define ELK_IR_ALLOCATOR_H 27 28 #include "util/compiler.h" 29 #include "util/glheader.h" 30 #include "util/macros.h" 31 #include "util/rounding.h" 32 #include "util/u_math.h" 33 34 namespace elk { 35 /** 36 * Simple allocator used to keep track of virtual GRFs. 37 */ 38 class simple_allocator { 39 public: simple_allocator()40 simple_allocator() : 41 sizes(NULL), offsets(NULL), count(0), total_size(0), capacity(0) 42 { 43 } 44 45 simple_allocator(const simple_allocator &) = delete; 46 ~simple_allocator()47 ~simple_allocator() 48 { 49 free(offsets); 50 free(sizes); 51 } 52 53 simple_allocator & operator=(const simple_allocator &) = delete; 54 55 unsigned allocate(unsigned size)56 allocate(unsigned size) 57 { 58 assert(size > 0); 59 if (capacity <= count) { 60 capacity = MAX2(16, capacity * 2); 61 sizes = (unsigned *)realloc(sizes, capacity * sizeof(unsigned)); 62 offsets = (unsigned *)realloc(offsets, capacity * sizeof(unsigned)); 63 } 64 65 sizes[count] = size; 66 offsets[count] = total_size; 67 total_size += size; 68 69 return count++; 70 } 71 72 /** 73 * Array of sizes for each allocation. The allocation unit is up to the 74 * back-end, but it's expected to be one scalar value in the FS back-end 75 * and one vec4 in the VEC4 back-end. 76 */ 77 unsigned *sizes; 78 79 /** 80 * Array of offsets from the start of the VGRF space in allocation 81 * units. 82 */ 83 unsigned *offsets; 84 85 /** Total number of VGRFs allocated. */ 86 unsigned count; 87 88 /** Cumulative size in allocation units. */ 89 unsigned total_size; 90 91 private: 92 unsigned capacity; 93 }; 94 } 95 96 #endif 97