32bit-64bit

问题 Suppose I have unsigned long long x = 0x0123456789ABCDEF . Which of the following is correct? (I can verify only the first one): On a 32-bit little-endian processor, it will appear in memory as 67 45 23 01 EF CD AB 89 . On a 64-bit little-endian processor, it will appear in memory as EF CD AB 89 67 45 23 01 . On a 32-bit big-endian processor, it will appear in memory as 01 23 45 67 89 AB CD EF . On a 64-bit big-endian processor, it will appear in memory as 01 23 45 67 89 AB CD EF . 回答1: The

问题 My Linux Server information is: [root@centos nan]# uname -a Linux centos 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux By default, the gcc will generate the 64-bit executable file, so I use the "-m32" flags to build 32-bit executable file. After running the following command: [root@centos nan]# gcc -m32 -o a a.c /usr/bin/ld: crt1.o: No such file: No such file or directory collect2: ld returned 1 exit status So how to build 32-bit executable file in

问题 Please let me know whether service fabric supports capability similar to WoW64 ? I have a 32 bit .NET application which depends on 32 bit unmanged c++ dlls. Is it possible to run this application in Service Fabric in any way? 回答1: You can host any existing applications in Service Fabric (https://azure.microsoft.com/en-us/documentation/articles/service-fabric-deploy-existing-app/). However if you want to use reliable collections, reliable actors APIs, your application needs to be 64 bit. For

问题 I would like to introduce some assembly code into a c99 codebase. I want to use the UMULL instruction from the ARM CPU to multiply 2 uint32_t and get the result immediately into a uint64_t. Now a uint64_t needs 2 registers, so how do I specify the output and the constraints of the asm block? 回答1: Good question! The following code outputs what you want using GCC -O or higher without resorting to assembler: uint32_t a, b; uint64_t c; ... c = (uint64_t)a * (uint64_t)b; or if you feel you must

问题 I have a c# windows application project. I want to build two .exe files, one is run as 64bit on 64 bit OS (by platform targeting 'Any CPU'), the other is run as 32 bit on 64 bit OS (by platform targeting x86). Currently, I should change my build configuration whenever i need the other configuration, and rename the compiled file to distinguish between 32 and 64. Is there an easier way to manage multiple configurations? 回答1: Create a 32 bit build and 64 bit build. This will allow you to have

问题 Recently I updated the JRE through the update process which chrome (Version 38.0.2125.104 m) offers ("your java is outdated and needs an update" or similar). The result was that my eclipse luna (64 bit) did not execute anymore. Looking closer to the background I detected: the chrome java updater (notabene started from an Oracle site) added C:\ProgramData\Oracle\Java\javapath in front of the env var PATH. This folder contains three symbolic links to the newest java 8 JRE installation in (x86)

问题 Assuming you have a 64 bit capable processor running a 32 bit operating system. Would it be possible to run some 64 bit assembly instructions in a 32 bit program? Can't see why not if you have a 64 bit capable processor, but there are so many stingy technical issues in computing, especially the operating system. NOTE I am not talking about running a 64 bit program on a 32 bit os, just using 64 bit assembly instructions embedded in a 32 bit program. 回答1: The thing you would most need to know

问题 I would like to install my USB device driver [.inf file] using PnPUtil.exe utility on both 32bit and 64bit systems for Windows Vista and Windows 7. I tested on my machine [Windows 7 32bit] and everything was fine because PnpUtil.exe is located in: C:\Windows\System32\PnPUtil.exe . But in 64bit Windows 7 the utility is not in this directory. When I tried installing driver on different Windows 7 - 64bit machine I could found PnPUtil.exe in this location: C:\WIndows\winsxs\amd64_microsoft

问题 I would like to install my USB device driver [.inf file] using PnPUtil.exe utility on both 32bit and 64bit systems for Windows Vista and Windows 7. I tested on my machine [Windows 7 32bit] and everything was fine because PnpUtil.exe is located in: C:\Windows\System32\PnPUtil.exe . But in 64bit Windows 7 the utility is not in this directory. When I tried installing driver on different Windows 7 - 64bit machine I could found PnPUtil.exe in this location: C:\WIndows\winsxs\amd64_microsoft

问题 I would like to install my USB device driver [.inf file] using PnPUtil.exe utility on both 32bit and 64bit systems for Windows Vista and Windows 7. I tested on my machine [Windows 7 32bit] and everything was fine because PnpUtil.exe is located in: C:\Windows\System32\PnPUtil.exe . But in 64bit Windows 7 the utility is not in this directory. When I tried installing driver on different Windows 7 - 64bit machine I could found PnPUtil.exe in this location: C:\WIndows\winsxs\amd64_microsoft