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Last change
on this file since 5285 was 4071, checked in by vboxsync, 17 years ago |
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Biggest check-in ever. New source code headers for all (C) innotek files.
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| 1 | ; $Id: mempcpy.asm 4071 2007-08-07 17:07:59Z vboxsync $
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| 2 | ;; @file
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| 3 | ; innotek Portable Runtime - No-CRT mempcpy - AMD64 & X86.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2006-2007 innotek GmbH
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License as published by the Free Software Foundation,
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| 13 | ; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | ; distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | ; be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 |
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| 17 | %include "iprt/asmdefs.mac"
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| 18 |
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| 19 | BEGINCODE
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| 20 |
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| 21 | ;;
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| 22 | ; @param pvDst gcc: rdi msc: rcx x86:[esp+4]
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| 23 | ; @param pvSrc gcc: rsi msc: rdx x86:[esp+8]
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| 24 | ; @param cb gcc: rdx msc: r8 x86:[esp+0ch]
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| 25 | BEGINPROC RT_NOCRT(mempcpy)
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| 26 | cld ; paranoia
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| 27 |
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| 28 | ; Do the bulk of the work.
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| 29 | %ifdef RT_ARCH_AMD64
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| 30 | %ifdef ASM_CALL64_MSC
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| 31 | mov r10, rdi ; save
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| 32 | mov r11, rsi ; save
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| 33 | mov rdi, rcx
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| 34 | mov rsi, rdx
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| 35 | mov rcx, r8
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| 36 | mov rdx, r8
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| 37 | %else
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| 38 | mov rcx, rdx
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| 39 | %endif
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| 40 | shr rcx, 3
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| 41 | rep movsq
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| 42 | %else
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| 43 | mov eax, edi ; saving edi in eax
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| 44 | push esi
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| 45 |
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| 46 | mov ecx, [esp + 0ch + 4]
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| 47 | mov edi, [esp + 04h + 4]
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| 48 | mov esi, [esp + 08h + 4]
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| 49 | mov edx, ecx
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| 50 | shr ecx, 2
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| 51 | rep movsd
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| 52 | %endif
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| 53 |
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| 54 | ; The remaining bytes.
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| 55 | %ifdef RT_ARCH_AMD64
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| 56 | test dl, 4
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| 57 | jz .dont_move_dword
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| 58 | movsd
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| 59 | %endif
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| 60 | .dont_move_dword:
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| 61 | test dl, 2
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| 62 | jz .dont_move_word
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| 63 | movsw
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| 64 | .dont_move_word:
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| 65 | test dl, 1
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| 66 | jz .dont_move_byte
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| 67 | movsb
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| 68 | .dont_move_byte:
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| 69 |
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| 70 | ; restore & return
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| 71 | %ifdef RT_ARCH_AMD64
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| 72 | mov rax, rdi
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| 73 | %ifdef ASM_CALL64_MSC
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| 74 | mov rsi, r11
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| 75 | mov rdi, r10
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| 76 | %endif
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| 77 | %else
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| 78 | pop esi
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| 79 | xchg eax, edi
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| 80 | %endif
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| 81 | ret
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| 82 | ENDPROC RT_NOCRT(mempcpy)
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| 83 |
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