Mercurial > hg > graal-compiler
annotate src/os_cpu/linux_x86/vm/copy_linux_x86.inline.hpp @ 1603:d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
Summary: Modify assembler code to check for 0 count for all copy routines.
Reviewed-by: never, ysr, jcoomes
| author | kvn |
|---|---|
| date | Thu, 10 Jun 2010 13:04:20 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 | |
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| 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 26 #ifdef AMD64 | |
| 27 (void)memmove(to, from, count * HeapWordSize); | |
| 28 #else | |
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
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29 // Includes a zero-count check. |
| 0 | 30 intx temp; |
| 31 __asm__ volatile(" testl %6,%6 ;" | |
| 32 " jz 7f ;" | |
| 33 " cmpl %4,%5 ;" | |
| 34 " leal -4(%4,%6,4),%3;" | |
| 35 " jbe 1f ;" | |
| 36 " cmpl %7,%5 ;" | |
| 37 " jbe 4f ;" | |
| 38 "1: cmpl $32,%6 ;" | |
| 39 " ja 3f ;" | |
| 40 " subl %4,%1 ;" | |
| 41 "2: movl (%4),%3 ;" | |
| 42 " movl %7,(%5,%4,1) ;" | |
| 43 " addl $4,%0 ;" | |
| 44 " subl $1,%2 ;" | |
| 45 " jnz 2b ;" | |
| 46 " jmp 7f ;" | |
| 47 "3: rep; smovl ;" | |
| 48 " jmp 7f ;" | |
| 49 "4: cmpl $32,%2 ;" | |
| 50 " movl %7,%0 ;" | |
| 51 " leal -4(%5,%6,4),%1;" | |
| 52 " ja 6f ;" | |
| 53 " subl %4,%1 ;" | |
| 54 "5: movl (%4),%3 ;" | |
| 55 " movl %7,(%5,%4,1) ;" | |
| 56 " subl $4,%0 ;" | |
| 57 " subl $1,%2 ;" | |
| 58 " jnz 5b ;" | |
| 59 " jmp 7f ;" | |
| 60 "6: std ;" | |
| 61 " rep; smovl ;" | |
| 62 " cld ;" | |
| 63 "7: nop " | |
| 64 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) | |
| 65 : "0" (from), "1" (to), "2" (count), "3" (temp) | |
| 66 : "memory", "flags"); | |
| 67 #endif // AMD64 | |
| 68 } | |
| 69 | |
| 70 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 71 #ifdef AMD64 | |
| 72 switch (count) { | |
| 73 case 8: to[7] = from[7]; | |
| 74 case 7: to[6] = from[6]; | |
| 75 case 6: to[5] = from[5]; | |
| 76 case 5: to[4] = from[4]; | |
| 77 case 4: to[3] = from[3]; | |
| 78 case 3: to[2] = from[2]; | |
| 79 case 2: to[1] = from[1]; | |
| 80 case 1: to[0] = from[0]; | |
| 81 case 0: break; | |
| 82 default: | |
| 83 (void)memcpy(to, from, count * HeapWordSize); | |
| 84 break; | |
| 85 } | |
| 86 #else | |
|
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1552
diff
changeset
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87 // Includes a zero-count check. |
| 0 | 88 intx temp; |
| 89 __asm__ volatile(" testl %6,%6 ;" | |
| 90 " jz 3f ;" | |
| 91 " cmpl $32,%6 ;" | |
| 92 " ja 2f ;" | |
| 93 " subl %4,%1 ;" | |
| 94 "1: movl (%4),%3 ;" | |
| 95 " movl %7,(%5,%4,1);" | |
| 96 " addl $4,%0 ;" | |
| 97 " subl $1,%2 ;" | |
| 98 " jnz 1b ;" | |
| 99 " jmp 3f ;" | |
| 100 "2: rep; smovl ;" | |
| 101 "3: nop " | |
| 102 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) | |
| 103 : "0" (from), "1" (to), "2" (count), "3" (temp) | |
| 104 : "memory", "cc"); | |
| 105 #endif // AMD64 | |
| 106 } | |
| 107 | |
| 108 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) { | |
| 109 #ifdef AMD64 | |
| 110 switch (count) { | |
| 111 case 8: to[7] = from[7]; | |
| 112 case 7: to[6] = from[6]; | |
| 113 case 6: to[5] = from[5]; | |
| 114 case 5: to[4] = from[4]; | |
| 115 case 4: to[3] = from[3]; | |
| 116 case 3: to[2] = from[2]; | |
| 117 case 2: to[1] = from[1]; | |
| 118 case 1: to[0] = from[0]; | |
| 119 case 0: break; | |
| 120 default: | |
| 121 while (count-- > 0) { | |
| 122 *to++ = *from++; | |
| 123 } | |
| 124 break; | |
| 125 } | |
| 126 #else | |
| 127 // pd_disjoint_words is word-atomic in this implementation. | |
| 128 pd_disjoint_words(from, to, count); | |
| 129 #endif // AMD64 | |
| 130 } | |
| 131 | |
| 132 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
|
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1552
diff
changeset
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133 pd_conjoint_words(from, to, count); |
| 0 | 134 } |
| 135 | |
| 136 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 137 pd_disjoint_words(from, to, count); | |
| 138 } | |
| 139 | |
| 140 static void pd_conjoint_bytes(void* from, void* to, size_t count) { | |
| 141 #ifdef AMD64 | |
| 142 (void)memmove(to, from, count); | |
| 143 #else | |
|
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1552
diff
changeset
|
144 // Includes a zero-count check. |
| 0 | 145 intx temp; |
| 146 __asm__ volatile(" testl %6,%6 ;" | |
| 147 " jz 13f ;" | |
| 148 " cmpl %4,%5 ;" | |
| 149 " leal -1(%4,%6),%3 ;" | |
| 150 " jbe 1f ;" | |
| 151 " cmpl %7,%5 ;" | |
| 152 " jbe 8f ;" | |
| 153 "1: cmpl $3,%6 ;" | |
| 154 " jbe 6f ;" | |
| 155 " movl %6,%3 ;" | |
| 156 " movl $4,%2 ;" | |
| 157 " subl %4,%2 ;" | |
| 158 " andl $3,%2 ;" | |
| 159 " jz 2f ;" | |
| 160 " subl %6,%3 ;" | |
| 161 " rep; smovb ;" | |
| 162 "2: movl %7,%2 ;" | |
| 163 " shrl $2,%2 ;" | |
| 164 " jz 5f ;" | |
| 165 " cmpl $32,%2 ;" | |
| 166 " ja 4f ;" | |
| 167 " subl %4,%1 ;" | |
| 168 "3: movl (%4),%%edx ;" | |
| 169 " movl %%edx,(%5,%4,1);" | |
| 170 " addl $4,%0 ;" | |
| 171 " subl $1,%2 ;" | |
| 172 " jnz 3b ;" | |
| 173 " addl %4,%1 ;" | |
| 174 " jmp 5f ;" | |
| 175 "4: rep; smovl ;" | |
| 176 "5: movl %7,%2 ;" | |
| 177 " andl $3,%2 ;" | |
| 178 " jz 13f ;" | |
| 179 "6: xorl %7,%3 ;" | |
| 180 "7: movb (%4,%7,1),%%dl ;" | |
| 181 " movb %%dl,(%5,%7,1) ;" | |
| 182 " addl $1,%3 ;" | |
| 183 " subl $1,%2 ;" | |
| 184 " jnz 7b ;" | |
| 185 " jmp 13f ;" | |
| 186 "8: std ;" | |
| 187 " cmpl $12,%2 ;" | |
| 188 " ja 9f ;" | |
| 189 " movl %7,%0 ;" | |
| 190 " leal -1(%6,%5),%1 ;" | |
| 191 " jmp 11f ;" | |
| 192 "9: xchgl %3,%2 ;" | |
| 193 " movl %6,%0 ;" | |
| 194 " addl $1,%2 ;" | |
| 195 " leal -1(%7,%5),%1 ;" | |
| 196 " andl $3,%2 ;" | |
| 197 " jz 10f ;" | |
| 198 " subl %6,%3 ;" | |
| 199 " rep; smovb ;" | |
| 200 "10: movl %7,%2 ;" | |
| 201 " subl $3,%0 ;" | |
| 202 " shrl $2,%2 ;" | |
| 203 " subl $3,%1 ;" | |
| 204 " rep; smovl ;" | |
| 205 " andl $3,%3 ;" | |
| 206 " jz 12f ;" | |
| 207 " movl %7,%2 ;" | |
| 208 " addl $3,%0 ;" | |
| 209 " addl $3,%1 ;" | |
| 210 "11: rep; smovb ;" | |
| 211 "12: cld ;" | |
| 212 "13: nop ;" | |
| 213 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) | |
| 214 : "0" (from), "1" (to), "2" (count), "3" (temp) | |
| 215 : "memory", "flags", "%edx"); | |
| 216 #endif // AMD64 | |
| 217 } | |
| 218 | |
| 219 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) { | |
| 220 pd_conjoint_bytes(from, to, count); | |
| 221 } | |
| 222 | |
| 223 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { | |
| 224 _Copy_conjoint_jshorts_atomic(from, to, count); | |
| 225 } | |
| 226 | |
| 227 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) { | |
| 228 #ifdef AMD64 | |
| 229 _Copy_conjoint_jints_atomic(from, to, count); | |
| 230 #else | |
| 231 assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size"); | |
| 232 // pd_conjoint_words is word-atomic in this implementation. | |
| 233 pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count); | |
| 234 #endif // AMD64 | |
| 235 } | |
| 236 | |
| 237 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { | |
| 238 #ifdef AMD64 | |
| 239 _Copy_conjoint_jlongs_atomic(from, to, count); | |
| 240 #else | |
| 241 // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't. | |
| 242 if (from > to) { | |
| 243 while (count-- > 0) { | |
| 244 __asm__ volatile("fildll (%0); fistpll (%1)" | |
| 245 : | |
| 246 : "r" (from), "r" (to) | |
| 247 : "memory" ); | |
| 248 ++from; | |
| 249 ++to; | |
| 250 } | |
| 251 } else { | |
| 252 while (count-- > 0) { | |
| 253 __asm__ volatile("fildll (%0,%2,8); fistpll (%1,%2,8)" | |
| 254 : | |
| 255 : "r" (from), "r" (to), "r" (count) | |
| 256 : "memory" ); | |
| 257 } | |
| 258 } | |
| 259 #endif // AMD64 | |
| 260 } | |
| 261 | |
| 262 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) { | |
| 263 #ifdef AMD64 | |
| 264 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); | |
| 265 _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); | |
| 266 #else | |
| 267 assert(HeapWordSize == BytesPerOop, "heapwords and oops must be the same size"); | |
| 268 // pd_conjoint_words is word-atomic in this implementation. | |
| 269 pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count); | |
| 270 #endif // AMD64 | |
| 271 } | |
| 272 | |
| 273 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) { | |
| 274 _Copy_arrayof_conjoint_bytes(from, to, count); | |
| 275 } | |
| 276 | |
| 277 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) { | |
| 278 _Copy_arrayof_conjoint_jshorts(from, to, count); | |
| 279 } | |
| 280 | |
| 281 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) { | |
| 282 #ifdef AMD64 | |
| 283 _Copy_arrayof_conjoint_jints(from, to, count); | |
| 284 #else | |
| 285 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count); | |
| 286 #endif // AMD64 | |
| 287 } | |
| 288 | |
| 289 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) { | |
| 290 #ifdef AMD64 | |
| 291 _Copy_arrayof_conjoint_jlongs(from, to, count); | |
| 292 #else | |
| 293 pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); | |
| 294 #endif // AMD64 | |
| 295 } | |
| 296 | |
| 297 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) { | |
| 298 #ifdef AMD64 | |
| 299 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); | |
| 300 _Copy_arrayof_conjoint_jlongs(from, to, count); | |
| 301 #else | |
| 302 pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); | |
| 303 #endif // AMD64 | |
| 304 } |