| | 1 | /* |
| | 2 | * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | |
| | 29 | /*- |
| | 30 | * Copyright (c) 1990 The Regents of the University of California. |
| | 31 | * All rights reserved. |
| | 32 | * |
| | 33 | * This code is derived from locore.s. |
| | 34 | * |
| | 35 | * Redistribution and use in source and binary forms, with or without |
| | 36 | * modification, are permitted provided that the following conditions |
| | 37 | * are met: |
| | 38 | * 1. Redistributions of source code must retain the above copyright |
| | 39 | * notice, this list of conditions and the following disclaimer. |
| | 40 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 41 | * notice, this list of conditions and the following disclaimer in the |
| | 42 | * documentation and/or other materials provided with the distribution. |
| | 43 | * 3. All advertising materials mentioning features or use of this software |
| | 44 | * must display the following acknowledgement: |
| | 45 | * This product includes software developed by the University of |
| | 46 | * California, Berkeley and its contributors. |
| | 47 | * 4. Neither the name of the University nor the names of its contributors |
| | 48 | * may be used to endorse or promote products derived from this software |
| | 49 | * without specific prior written permission. |
| | 50 | * |
| | 51 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 52 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 53 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 54 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 55 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 56 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 57 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 58 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 59 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 60 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 61 | * SUCH DAMAGE. |
| | 62 | */ |
| | 63 | |
| | 64 | #include <sys/appleapiopts.h> |
| | 65 | #include <machine/cpu_capabilities.h> |
| | 66 | #include <machine/commpage.h> |
| | 67 | #include <machine/asm.h> |
| | 68 | |
| | 69 | /* |
| | 70 | * (ov)bcopy (src,dst,cnt) |
| | 71 | * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800 |
| | 72 | */ |
| | 73 | |
| | 74 | .text |
| | 75 | .align 5, 0x90 |
| | 76 | Lbcopy_scalar: |
| | 77 | pushl %ebp /* set up a frame for backtraces */ |
| | 78 | movl %esp,%ebp |
| | 79 | pushl %esi |
| | 80 | pushl %edi |
| | 81 | movl 8(%ebp),%esi |
| | 82 | movl 12(%ebp),%edi |
| | 83 | jmp 1f |
| | 84 | /* |
| | 85 | ** These need to be 32 bytes from Lbcopy_scalar |
| | 86 | */ |
| | 87 | .align 5, 0x90 |
| | 88 | Lmemcpy_scalar: |
| | 89 | Lmemmove_scalar: |
| | 90 | pushl %ebp /* set up a frame for backtraces */ |
| | 91 | movl %esp,%ebp |
| | 92 | pushl %esi |
| | 93 | pushl %edi |
| | 94 | movl 8(%ebp),%edi |
| | 95 | movl 12(%ebp),%esi |
| | 96 | movl %edi,%eax |
| | 97 | 1: |
| | 98 | movl 16(%ebp),%ecx |
| | 99 | movl %edi,%edx |
| | 100 | subl %esi,%edx |
| | 101 | cmpl %ecx,%edx /* overlapping? */ |
| | 102 | jb 2f |
| | 103 | cld /* nope, copy forwards. */ |
| | 104 | movl %ecx,%edx |
| | 105 | shrl $2,%ecx /* copy by words */ |
| | 106 | rep |
| | 107 | movsl |
| | 108 | movl %edx,%ecx |
| | 109 | andl $3,%ecx /* any bytes left? */ |
| | 110 | rep |
| | 111 | movsb |
| | 112 | popl %edi |
| | 113 | popl %esi |
| | 114 | popl %ebp |
| | 115 | ret |
| | 116 | 2: |
| | 117 | addl %ecx,%edi /* copy backwards. */ |
| | 118 | addl %ecx,%esi |
| | 119 | std |
| | 120 | movl %ecx,%edx |
| | 121 | andl $3,%ecx /* any fractional bytes? */ |
| | 122 | decl %edi |
| | 123 | decl %esi |
| | 124 | rep |
| | 125 | movsb |
| | 126 | movl %edx,%ecx /* copy remainder by words */ |
| | 127 | shrl $2,%ecx |
| | 128 | subl $3,%esi |
| | 129 | subl $3,%edi |
| | 130 | rep |
| | 131 | movsl |
| | 132 | popl %edi |
| | 133 | popl %esi |
| | 134 | popl %ebp |
| | 135 | cld |
| | 136 | ret |
| | 137 | |
| | 138 | COMMPAGE_DESCRIPTOR(bcopy_scalar,_COMM_PAGE_BCOPY,0,kHasSSE2+kHasSupplementalSSE3) |
projects / apple / xnu.git / blame_incremental