1 | ; $Id: ASMAtomicUoAndU64.asm 56290 2015-06-09 14:01:31Z vboxsync $
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2 | ;; @file
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3 | ; IPRT - ASMAtomicUoAndU64().
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4 | ;
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5 |
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6 | ;
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7 | ; Copyright (C) 2013-2015 Oracle Corporation
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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 (GPL) as published by the Free Software
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13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | ;
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17 | ; The contents of this file may alternatively be used under the terms
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18 | ; of the Common Development and Distribution License Version 1.0
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19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | ; VirtualBox OSE distribution, in which case the provisions of the
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21 | ; CDDL are applicable instead of those of the GPL.
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22 | ;
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23 | ; You may elect to license modified versions of this file under the
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24 | ; terms and conditions of either the GPL or the CDDL or both.
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25 | ;
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26 |
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27 | ;*******************************************************************************
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28 | ;* Header Files *
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29 | ;*******************************************************************************
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30 | %include "iprt/asmdefs.mac"
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31 |
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32 | BEGINCODE
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33 |
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34 | ;;
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35 | ; Atomically AND an unsigned 64-bit value, unordered.
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36 | ;
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37 | ; @param pu64 x86:ebp+8 gcc:rdi msc:rcx
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38 | ; @param u64Or x86:ebp+c gcc:rsi msc:rdx
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39 | ;
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40 | ; @returns void
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41 | ;
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42 | BEGINPROC_EXPORTED ASMAtomicUoAndU64
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43 | %ifdef RT_ARCH_AMD64
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44 | %ifdef ASM_CALL64_MSC
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45 | and [rcx], rdx
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46 | %else
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47 | and [rdi], rsi
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48 | %endif
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49 | %elifdef RT_ARCH_X86
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50 | push ebp
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51 | mov ebp, esp
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52 | push ebx
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53 | push edi
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54 |
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55 | mov edi, [ebp + 08h]
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56 | mov ebx, [ebp + 0ch]
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57 | mov ecx, [ebp + 0ch + 4]
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58 | mov eax, ebx
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59 | mov edx, ecx
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60 | .try_again:
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61 | cmpxchg8b [edi]
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62 | jz .done
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63 | mov ebx, eax
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64 | and ebx, [ebp + 0ch]
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65 | mov ecx, edx
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66 | and ecx, [ebp + 0ch + 4]
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67 | jmp .try_again
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68 |
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69 | .done:
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70 | pop edi
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71 | pop ebx
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72 | leave
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73 | %endif
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74 | ret
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75 | ENDPROC ASMAtomicUoAndU64
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76 |
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