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comparison src/os_cpu/linux_x86/vm/linux_x86_32.s @ 1930:2d26b0046e0d

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Merge.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Tue, 30 Nov 2010 14:53:30 +0100
parents d93949c5bdcc
children 0a8e0d4345b3 4fc084dac61e
comparison
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1484:6b7001391c97 1930:2d26b0046e0d
1 # 1 #
2 # Copyright 2004-2007 Sun Microsystems, Inc. All Rights Reserved. 2 # Copyright (c) 2004, 2007, Oracle and/or its affiliates. All rights reserved.
3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 # 4 #
5 # This code is free software; you can redistribute it and/or modify it 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 6 # under the terms of the GNU General Public License version 2 only, as
7 # published by the Free Software Foundation. 7 # published by the Free Software Foundation.
14 # 14 #
15 # You should have received a copy of the GNU General Public License version 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, 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. 17 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 # 18 #
19 # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 19 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 # CA 95054 USA or visit www.sun.com if you need additional information or 20 # or visit www.oracle.com if you need additional information or have any
21 # have any questions. 21 # questions.
22 # 22 #
23 23
24 24
25 # NOTE WELL! The _Copy functions are called directly 25 # NOTE WELL! The _Copy functions are called directly
26 # from server-compiler-generated code via CallLeafNoFP, 26 # from server-compiler-generated code via CallLeafNoFP,
119 addl $4,%esi 119 addl $4,%esi
120 subl $1,%ecx 120 subl $1,%ecx
121 jnz 3b 121 jnz 3b
122 addl %esi,%edi 122 addl %esi,%edi
123 4: movl %eax,%ecx # byte count less prefix 123 4: movl %eax,%ecx # byte count less prefix
124 andl $3,%ecx # suffix byte count 124 5: andl $3,%ecx # suffix byte count
125 jz 7f # no suffix 125 jz 7f # no suffix
126 # copy suffix 126 # copy suffix
127 5: xorl %eax,%eax 127 xorl %eax,%eax
128 6: movb (%esi,%eax,1),%dl 128 6: movb (%esi,%eax,1),%dl
129 movb %dl,(%edi,%eax,1) 129 movb %dl,(%edi,%eax,1)
130 addl $1,%eax 130 addl $1,%eax
131 subl $1,%ecx 131 subl $1,%ecx
132 jnz 6b 132 jnz 6b
157 addl %esi,%edi 157 addl %esi,%edi
158 jmp 4f 158 jmp 4f
159 # copy dwords, aligned or not 159 # copy dwords, aligned or not
160 3: rep; smovl 160 3: rep; smovl
161 4: movl %eax,%ecx # byte count 161 4: movl %eax,%ecx # byte count
162 andl $3,%ecx # suffix byte count 162 5: andl $3,%ecx # suffix byte count
163 jz 7f # no suffix 163 jz 7f # no suffix
164 # copy suffix 164 # copy suffix
165 5: subl %esi,%edi 165 subl %esi,%edi
166 addl $3,%esi 166 addl $3,%esi
167 6: movb (%esi),%dl 167 6: movb (%esi),%dl
168 movb %dl,(%edi,%esi,1) 168 movb %dl,(%edi,%esi,1)
169 subl $1,%esi 169 subl $1,%esi
170 subl $1,%ecx 170 subl $1,%ecx
212 addl %esi,%edi 212 addl %esi,%edi
213 jmp 4f 213 jmp 4f
214 # copy aligned dwords 214 # copy aligned dwords
215 3: rep; smovl 215 3: rep; smovl
216 4: movl %eax,%ecx 216 4: movl %eax,%ecx
217 andl $3,%ecx 217 5: andl $3,%ecx
218 jz 7f 218 jz 7f
219 # copy suffix 219 # copy suffix
220 5: xorl %eax,%eax 220 xorl %eax,%eax
221 6: movb (%esi,%eax,1),%dl 221 6: movb (%esi,%eax,1),%dl
222 movb %dl,(%edi,%eax,1) 222 movb %dl,(%edi,%eax,1)
223 addl $1,%eax 223 addl $1,%eax
224 subl $1,%ecx 224 subl $1,%ecx
225 jnz 6b 225 jnz 6b
248 subl $4,%esi 248 subl $4,%esi
249 subl $1,%ecx 249 subl $1,%ecx
250 jnz 3b 250 jnz 3b
251 addl %esi,%edi 251 addl %esi,%edi
252 4: movl %eax,%ecx 252 4: movl %eax,%ecx
253 andl $3,%ecx 253 5: andl $3,%ecx
254 jz 7f 254 jz 7f
255 5: subl %esi,%edi 255 subl %esi,%edi
256 addl $3,%esi 256 addl $3,%esi
257 6: movb (%esi),%dl 257 6: movb (%esi),%dl
258 movb %dl,(%edi,%esi,1) 258 movb %dl,(%edi,%esi,1)
259 subl $1,%esi 259 subl $1,%esi
260 subl $1,%ecx 260 subl $1,%ecx
285 # align source address at dword address boundary 285 # align source address at dword address boundary
286 movl %esi,%eax # original from 286 movl %esi,%eax # original from
287 andl $3,%eax # either 0 or 2 287 andl $3,%eax # either 0 or 2
288 jz 1f # no prefix 288 jz 1f # no prefix
289 # copy prefix 289 # copy prefix
290 subl $1,%ecx
291 jl 5f # zero count
290 movw (%esi),%dx 292 movw (%esi),%dx
291 movw %dx,(%edi) 293 movw %dx,(%edi)
292 addl %eax,%esi # %eax == 2 294 addl %eax,%esi # %eax == 2
293 addl %eax,%edi 295 addl %eax,%edi
294 subl $1,%ecx
295 1: movl %ecx,%eax # word count less prefix 296 1: movl %ecx,%eax # word count less prefix
296 sarl %ecx # dword count 297 sarl %ecx # dword count
297 jz 4f # no dwords to move 298 jz 4f # no dwords to move
298 cmpl $32,%ecx 299 cmpl $32,%ecx
299 jbe 2f # <= 32 dwords 300 jbe 2f # <= 32 dwords
452 popl %edi 453 popl %edi
453 popl %esi 454 popl %esi
454 ret 455 ret
455 .=.+10 456 .=.+10
456 2: subl %esi,%edi 457 2: subl %esi,%edi
458 jmp 4f
457 .p2align 4,,15 459 .p2align 4,,15
458 3: movl (%esi),%edx 460 3: movl (%esi),%edx
459 movl %edx,(%edi,%esi,1) 461 movl %edx,(%edi,%esi,1)
460 addl $4,%esi 462 addl $4,%esi
461 subl $1,%ecx 463 4: subl $1,%ecx
462 jnz 3b 464 jge 3b
463 popl %edi 465 popl %edi
464 popl %esi 466 popl %esi
465 ret 467 ret
466 ci_CopyLeft: 468 ci_CopyLeft:
467 std 469 std
468 leal -4(%edi,%ecx,4),%edi # to + count*4 - 4 470 leal -4(%edi,%ecx,4),%edi # to + count*4 - 4
469 cmpl $32,%ecx 471 cmpl $32,%ecx
470 ja 3f # > 32 dwords 472 ja 4f # > 32 dwords
471 subl %eax,%edi # eax == from + count*4 - 4 473 subl %eax,%edi # eax == from + count*4 - 4
474 jmp 3f
472 .p2align 4,,15 475 .p2align 4,,15
473 2: movl (%eax),%edx 476 2: movl (%eax),%edx
474 movl %edx,(%edi,%eax,1) 477 movl %edx,(%edi,%eax,1)
475 subl $4,%eax 478 subl $4,%eax
476 subl $1,%ecx 479 3: subl $1,%ecx
477 jnz 2b 480 jge 2b
478 cld 481 cld
479 popl %edi 482 popl %edi
480 popl %esi 483 popl %esi
481 ret 484 ret
482 3: movl %eax,%esi # from + count*4 - 4 485 4: movl %eax,%esi # from + count*4 - 4
483 rep; smovl 486 rep; smovl
484 cld 487 cld
485 popl %edi 488 popl %edi
486 popl %esi 489 popl %esi
487 ret 490 ret