Mercurial > hg > graal-jvmci-8
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 |
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date | Thu, 10 Jun 2010 13:04:20 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. |
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12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
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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 |
c18cbe5936b8
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
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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
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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 | |
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
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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 } |