1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_SPARC_COPY_SPARC_HPP 26 #define CPU_SPARC_COPY_SPARC_HPP 27 28 // Inline functions for memory copy and fill. 29 30 static void pd_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) { 31 (void)memmove(to, from, count * HeapWordSize); 32 } 33 34 static void pd_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) { 35 switch (count) { 36 case 8: to[7] = from[7]; 37 case 7: to[6] = from[6]; 38 case 6: to[5] = from[5]; 39 case 5: to[4] = from[4]; 40 case 4: to[3] = from[3]; 41 case 3: to[2] = from[2]; 42 case 2: to[1] = from[1]; 43 case 1: to[0] = from[0]; 44 case 0: break; 45 default: (void)memcpy(to, from, count * HeapWordSize); 46 break; 47 } 48 } 49 50 static void pd_disjoint_words_atomic(const HeapWord* from, HeapWord* to, size_t count) { 51 switch (count) { 52 case 8: to[7] = from[7]; 53 case 7: to[6] = from[6]; 54 case 6: to[5] = from[5]; 55 case 5: to[4] = from[4]; 56 case 4: to[3] = from[3]; 57 case 3: to[2] = from[2]; 58 case 2: to[1] = from[1]; 59 case 1: to[0] = from[0]; 60 case 0: break; 61 default: while (count-- > 0) { 62 *to++ = *from++; 63 } 64 break; 65 } 66 } 67 68 static void pd_aligned_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) { 69 (void)memmove(to, from, count * HeapWordSize); 70 } 71 72 static void pd_aligned_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) { 73 pd_disjoint_words(from, to, count); 74 } 75 76 static void pd_conjoint_bytes(const void* from, void* to, size_t count) { 77 (void)memmove(to, from, count); 78 } 79 80 static void pd_conjoint_bytes_atomic(const void* from, void* to, size_t count) { 81 (void)memmove(to, from, count); 82 } 83 84 static void pd_conjoint_jshorts_atomic(const jshort* from, jshort* to, size_t count) { 85 if (from > to) { 86 while (count-- > 0) { 87 // Copy forwards 88 *to++ = *from++; 89 } 90 } else { 91 from += count - 1; 92 to += count - 1; 93 while (count-- > 0) { 94 // Copy backwards 95 *to-- = *from--; 96 } 97 } 98 } 99 100 static void pd_conjoint_jints_atomic(const jint* from, jint* to, size_t count) { 101 if (from > to) { 102 while (count-- > 0) { 103 // Copy forwards 104 *to++ = *from++; 105 } 106 } else { 107 from += count - 1; 108 to += count - 1; 109 while (count-- > 0) { 110 // Copy backwards 111 *to-- = *from--; 112 } 113 } 114 } 115 116 static void pd_conjoint_jlongs_atomic(const jlong* from, jlong* to, size_t count) { 117 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); 118 pd_conjoint_oops_atomic((const oop*)from, (oop*)to, count); 119 } 120 121 static void pd_conjoint_oops_atomic(const oop* from, oop* to, size_t count) { 122 // Do better than this: inline memmove body NEEDS CLEANUP 123 if (from > to) { 124 while (count-- > 0) { 125 // Copy forwards 126 *to++ = *from++; 127 } 128 } else { 129 from += count - 1; 130 to += count - 1; 131 while (count-- > 0) { 132 // Copy backwards 133 *to-- = *from--; 134 } 135 } 136 } 137 138 static void pd_arrayof_conjoint_bytes(const HeapWord* from, HeapWord* to, size_t count) { 139 pd_conjoint_bytes_atomic(from, to, count); 140 } 141 142 static void pd_arrayof_conjoint_jshorts(const HeapWord* from, HeapWord* to, size_t count) { 143 pd_conjoint_jshorts_atomic((const jshort*)from, (jshort*)to, count); 144 } 145 146 static void pd_arrayof_conjoint_jints(const HeapWord* from, HeapWord* to, size_t count) { 147 pd_conjoint_jints_atomic((const jint*)from, (jint*)to, count); 148 } 149 150 static void pd_arrayof_conjoint_jlongs(const HeapWord* from, HeapWord* to, size_t count) { 151 pd_conjoint_jlongs_atomic((const jlong*)from, (jlong*)to, count); 152 } 153 154 static void pd_arrayof_conjoint_oops(const HeapWord* from, HeapWord* to, size_t count) { 155 pd_conjoint_oops_atomic((const oop*)from, (oop*)to, count); 156 } 157 158 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) { 159 guarantee(mask_bits((uintptr_t)tohw, right_n_bits(LogBytesPerLong)) == 0, 160 "unaligned fill words"); 161 julong* to = (julong*)tohw; 162 julong v = ((julong)value << 32) | value; 163 while (count-- > 0) { 164 *to++ = v; 165 } 166 } 167 168 typedef void (*_zero_Fn)(HeapWord* to, size_t count); 169 170 // Only used for heap objects, so align_object_offset. 171 // All other platforms pd_fill_to_aligned_words simply calls pd_fill_to_words, don't 172 // know why this one is different. 173 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) { 174 assert(MinObjAlignmentInBytes >= BytesPerLong, "need alternate implementation"); 175 176 if (value == 0 && UseBlockZeroing && 177 (count > (size_t)(BlockZeroingLowLimit >> LogHeapWordSize))) { 178 // Call it only when block zeroing is used 179 ((_zero_Fn)StubRoutines::zero_aligned_words())(tohw, count); 180 } else { 181 julong* to = (julong*)tohw; 182 julong v = ((julong)value << 32) | value; 183 // If count is odd, odd will be equal to 1 on 32-bit platform 184 // and be equal to 0 on 64-bit platform. 185 size_t odd = count % (BytesPerLong / HeapWordSize) ; 186 187 size_t aligned_count = align_object_offset(count - odd) / HeapWordsPerLong; 188 julong* end = ((julong*)tohw) + aligned_count - 1; 189 while (to <= end) { 190 DEBUG_ONLY(count -= BytesPerLong / HeapWordSize ;) 191 *to++ = v; 192 } 193 assert(count == odd, "bad bounds on loop filling to aligned words"); 194 if (odd) { 195 *((juint*)to) = value; 196 197 } 198 } 199 } 200 201 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) { 202 (void)memset(to, value, count); 203 } 204 205 static void pd_zero_to_words(HeapWord* tohw, size_t count) { 206 pd_fill_to_words(tohw, count, 0); 207 } 208 209 static void pd_zero_to_bytes(void* to, size_t count) { 210 (void)memset(to, 0, count); 211 } 212 213 #endif // CPU_SPARC_COPY_SPARC_HPP