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  • Add and Subtract 128 Bit Integers in C(++)

    - by Billy ONeal
    Hello :) I'm writing a compressor for a long stream of 128 bit numbers. I would like to store the numbers as differences -- storing only the difference between the numbers rather than the numbers themselves because I can pack the differences in fewer bytes because they are smaller. However, for compression then I need to subtract these 128 bit values, and for decompression I need to add these values. Maximum integer size for my compiler is 64 bits wide. Anyone have any ideas for doing this efficiently? Billy3

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  • Getting the Leftmost Bit

    - by James
    I have a 5 bit integer that I'm working with. Is there a native function in Objective-C that will let me know which bit is the leftmost? i.e. I have 01001, it would return 8 or the position. Thanks

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  • SWT Windows64 bit

    - by Palani
    I am My application it throws the exception below. Exception in thread "main" java.lang.UnsatisfiedLinkError: Cannot load 32-bit SW T libraries on 64-bit JVM. How to solve this?what is the name of jar file needed?

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  • What advantage to I have if I use 64bit libraries?

    - by RadiantHex
    Hi folks, I see many people go crazy about 64bit libraries, and preferring them in general to the 32bit counter parts. I realise there is a lot of talk that gets lost in translation, and that the 64bit can be often over-valued. The setting is libraries that are called on web application, I'm aware that a new instance of the web app is generated for each hit. Therefore I'm thinking that 64bit is not necessary as the instances in no way surpass 2Gb of RAM usage. Help would be much appreciated! :)

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  • 64bit or 32bit Linux system?

    - by Milan Babuškov
    I have a server that has 4GB of RAM. On it, I have installation of 32bit Slackware Linux 12.1. Of course, it is not using all of 4GB of RAM. I'd soon like to increase the RAM to 8GB, and am looking for a way for the system to use it. The system is used as a database server and is under high load during the day. AFAICT, I have two options: stay with 32bit and rebuild the kernel and lose some performance. Or go with 64bit and reinstall everything. Looking at 64bit versions of Slackware, I could run -current or Slamd64. Now, on to the questions: Should I stay with 32bit or go with 64bit? If I go 64bit, should I use -current or Slamd64? P.S. I hope to get answers from someone actually using any of these configurations in production, not just copy/paste something I could find myself via Google.

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  • Running hardware with only 32bit drivers in 64bit windows

    - by Howard
    Recently we had to upgrade a system to handle added HD IP cameras. This upgrade involved an entirely new computer build with the exception of a rather pricey Geovision DVR (PCI/GV1480 series). Apparently while these cards do support Windows 7, they do not support Windows 7 x64. I'm stuck between a rock and a hard place here trying to figure out how we can remedy this, is there a virtualization solution that will allow devices with driver issues to passthru to the Guest OS? I was thinking XPMode may work for this solution however I am unsure if it runs 32bit or 64bit and if it'll allow driver-issue devices to pass to it. Any help would be greatly appreciated, Best Regards, Howard

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  • List total memusage by 32bit programs and 64bit programs

    - by egon
    How to get the total amount of memory used by 32bit applications and 64bit applications from the command line in Windows. I tried using tasklist /FI "MODULES eq wow64.dll" /FO CSV and then parsing the output and summing. But tasklist just freezes with any command that has something to do with modules (tasklist /m and tasklist /fi "modules eq wow64.dll" freeze). Are there any alternatives? Or some idea why tasklist freezes.

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  • Media Information for Constant and Variable bit rate of Video files

    - by cpx
    What is this Maximum bit rate for a .mp4 format file whose bit rate mode is Constant? Media information displayed for MP4 (Using MediaInfo Tool) ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : No Format settings, ReFrames : 1 frame Codec ID : avc1 Codec ID/Info : Advanced Video Coding Bit rate mode : Constant Bit rate : 1 500 Kbps Maximum bit rate : 3 961 Kbps Display aspect ratio : 4:3 Frame rate mode : Constant Frame rate : 29.970 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.163 In this case where the bit rate mode is set to Variable, is the Bit rate field where the value is displayed as 309 is its average bit rate? Media information displayed for M4V (Using MediaInfo Tool) ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : No Format settings, ReFrames : 1 frame Codec ID : avc1 Codec ID/Info : Advanced Video Coding Bit rate mode : Variable Bit rate : 309 Kbps Display aspect ratio : 16:9 Frame rate mode : Variable Frame rate : 23.976 fps Minimum frame rate : 23.810 fps Maximum frame rate : 24.390 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.229 Writing library : x264 core 120

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  • Windows 7 upgrade licensing

    - by bwerks
    I'm having trouble wading through Microsoft's marketing information. Does anyone know if Windows 7 x86 to Windows 7 x64 is a valid upgrade path? I know you can't actually use the built-in "upgrade" installation path; this is more of a licensing question. Although that may have answered my own question: is this idea even possible? Or do "upgrade" versions of Windows function only when executed from inside the OS, and not when doing fresh installs? Thanks!

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  • Running Java 32bit and 64bit on same computer

    - by Joris Meys
    I ran into a rather puzzling problem, trying to install Vuze 4.2.0.2 on my Windows 7. I have a Java 6 JDK 64bit, but Vuze complains that it can't find a correct 32bit JRE. Yet, as far as I know it shouldn't matter which Java is installed on the computer. (See also these answers). Now I was wondering : if it makes sense running a 32bit and a 64bit Java on the same machine, Whether that is possible, and if so what I should pay attention to in order to make sure that the correct Java is found. Thank you in advance PS : I have my reasons no to use the latest Vuze, so please don't tell me to update Vuze. I know.

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  • where.exe does not find OpenSSL libs when %ProgramFiles% variable is used in the PATH environment variable

    - by Piotr Dobrogost
    I installed both 32bit and 64bit version of OpenSSL libs on Vista x64. The 32bit version was installed in c:\Program Files (x86)\OpenSSL and the 64bit version was installed in c:\Program Files\OpenSSL. Then I added the entry %ProgramFiles%\OpenSSL to the PATH environment variable. %ProgramFiles%\OpenSSL is expanded to c:\Program Files (x86)\OpenSSL for 32bit programs and it's expanded to c:\Program Files\OpenSSL for 64bit programs. The idea is to have 32bit programs use 32bit version of OpenSSL libs and 64bit programs use 64bit version. I wanted to check if this works by running 32bit cmd.exe and issuing where ssleay32.dll and then by running 64bit cmd.exe and issuing the same. However in both cases I get the error INFO: Could not find files for the given pattern(s). What's wrong? This is a follow up to Different PATH environment variable for 32bit and 64bit Windows - is it possible?

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  • 32bit Application Memory Usage on 64bit Windows 7

    - by Brian
    I have an early 2012 Macbook Pro with and Intel I7 processor and 16 gigs RAM running Windows 7 Professional 64bit via Bootcamp. I work in Geographical Information Systems as a programmer so most of the applications I am running are 32bit Applications, but tend to use a lot of resources (i.e. ArcGIS, SQL Server Express, Visual Studio, etc.). I have been noticing that when I have multiple instances of either the same 32bit application or different 32bit applications and they are all working on hefty processing tasks, I am still only topping out at about 30% memory use. I understand 32bit applications are limited to less than 4gb RAM, but I assumed that one instance could use its own 4gb while another instance could use another 4gb to take full advantage of all the memory I have installed. Can anyone explain how this works and how I can get my applications to take advantage of all my memory via running multiple instances?

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  • Different PATH environment variable for 32bit and 64bit Windows - is it possible?

    - by Piotr Dobrogost
    Is it possible to have whole or part of PATH environment variable specific to the type of running process's image (32bit/64bit)? When I run some app from within 64bit cmd.exe I would like to have it pick the 64bit version of OpenSSL library whereas when I run some app from within 32bit cmd.exe I would like to have it pick the 32bit version of OpenSSL library. FOLLOW UP where.exe does not find OpenSSL libs when %ProgramFiles% variable is used in the PATH environment variable

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  • How to make an extremely old app run on 64bit Windows?

    - by Jerry Dodge
    I have a very old application designed for Windows 3.1. I have been able to use this application on Windows 7, however, that was Windows 7 32bit. Now I have since re-installed Windows to 64bit, and this application does not work, saying it's incompatible. I have tried running the application (and its other side-applications) in Windows '95 mode, but still the same message. How can I run this old app on 64bit Windows? For the record, the application is a game called "Sim Tower"

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  • Why is there no 64-bit Linux Firefox build?

    - by Legooolas
    It seems that I have to build my own 64-bit Firefox for Linux, as Mozilla won't support it until Firefox 4. Why is this? It looks to me as though it works fine, although without some of the speed improvements to the Javascript engine which the 32-bit version gets. (Edit: Yes I could run the 32-bit version but I'm trying to keep my system clear of 32-bit cruft and libraries etc, and all the plug-ins worked fine in 3.0.11 64-bit unofficial builds.) Update : No longer relevant as Mozilla provide 64-bit builds, but they don't show them on the download pages of mozilla.org, just on the ftp site as mentioned in one of the answers below.

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  • How can I upgrade from Windows 8 x32 to x64 fastest & easiest?

    - by parkviewK
    I was upgrading the hardware in a family member's computer and purchased the Windows 8 upgrade for $40 from their website. Not thinking, after I installed it I realized I now have 32bit Windows on this 64bit capable machine. Did some research and it appears that the upgrade assistant just gives you whatever architecture you were uprgading from (windows 7 32bit). Question is, what is my best option here? I have already purchased a key, will this work on x64? I'm considering installing Windows 8 Preview x64 and upgrading from there, but not sure if that will work or if it will make me purchase it again.

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  • How much faster is a 64bit CPU than 32bit CPU? [closed]

    - by W.N.
    I just need the result in theory. I'm not an expert in computer architecture, just a software developer. Most of my friends think 64bit-CPU is 2 times faster than 32bit-CPU. But I think 64-CPU is 2 ^ 2 = 4 times faster than 32bit-CPU (in theory). Which is the right answer to this question? And, if there were 128bit-CPU, how many times would it faster than a 32bit-CPU? PS: I searched with Google, and found a link that referred to benchmarks that supported my answer. I've seen a benchmark where 64bit was 4x faster but that was with a particular encryption where the extra registers available made the difference

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  • RegLoadAppKey working fine on 32-bit OS, failing on 64-bit OS, even if both processes are 32-bit

    - by James Manning
    I'm using .NET 4 and the new RegistryKey.FromHandle call so I can take the hKey I get from opening a registry file with RegLoadAppKey and operate on it with the existing managed API. I thought at first it was just a matter of a busted DllImport and my call had an invalid type in the params or a missing MarshalAs or whatever, but looking at other registry functions and their DllImport declarations (for instance, on pinvoke.net), I don't see what else to try (I've had hKey returned as both int and IntPtr, both worked on 32-bit OS and fail on 64-bit OS) I've got it down to as simple a repro case as I can - it just tries to create a 'random' subkey then write a value to it. It works fine on my Win7 x86 box and fails on Win7 x64 and 2008 R2 x64, even when it's still a 32-bit process, even run from a 32-bit cmd prompt. EDIT: It also fails in the same way if it's a 64-bit process. on Win7 x86: INFO: Running as Admin in 32-bit process on 32-bit OS Was able to create Microsoft\Windows\CurrentVersion\RunOnceEx\a95b1bbf-7a04-4707-bcca-6aee6afbfab7 and write a value under it on Win7 x64, as 32-bit: INFO: Running as Admin in 32-bit process on 64-bit OS Unhandled Exception: System.UnauthorizedAccessException: Access to the registry key '\Microsoft\Windows\CurrentVersion\RunOnceEx\ce6d5ff6-c3af-47f7-b3dc-c5a1b9a3cd22' is denied. at Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str) at Microsoft.Win32.RegistryKey.CreateSubKeyInternal(String subkey, RegistryKeyPermissionCheck permissionCheck, Object registrySecurityObj, RegistryOptions registryOptions) at Microsoft.Win32.RegistryKey.CreateSubKey(String subkey) at LoadAppKeyAndModify.Program.Main(String[] args) on Win7 x64, as 64-bit: INFO: Running as Admin in 64-bit process on 64-bit OS Unhandled Exception: System.UnauthorizedAccessException: Access to the registry key '\Microsoft\Windows\CurrentVersion\RunOnceEx\43bc857d-7d07-499c-8070-574d6732c130' is denied. at Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str) at Microsoft.Win32.RegistryKey.CreateSubKeyInternal(String subkey, RegistryKeyPermissionCheck permissionCheck, Object registrySecurityObj, RegistryOptions registryOptions) at Microsoft.Win32.RegistryKey.CreateSubKey(String subkey, RegistryKeyPermissionCheck permissionCheck) at LoadAppKeyAndModify.Program.Main(String[] args) source: class Program { static void Main(string[] args) { Console.WriteLine("INFO: Running as {0} in {1}-bit process on {2}-bit OS", new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator) ? "Admin" : "Normal User", Environment.Is64BitProcess ? 64 : 32, Environment.Is64BitOperatingSystem ? 64 : 32); if (args.Length != 1) { throw new ApplicationException("Need 1 argument - path to the software hive file on disk"); } string softwareHiveFile = Path.GetFullPath(args[0]); if (File.Exists(softwareHiveFile) == false) { throw new ApplicationException("Specified file does not exist: " + softwareHiveFile); } // pick a random subkey so it doesn't already exist var keyPathToCreate = "Microsoft\\Windows\\CurrentVersion\\RunOnceEx\\" + Guid.NewGuid(); var hKey = RegistryNativeMethods.RegLoadAppKey(softwareHiveFile); using (var safeRegistryHandle = new SafeRegistryHandle(new IntPtr(hKey), true)) using (var appKey = RegistryKey.FromHandle(safeRegistryHandle)) using (var runOnceExKey = appKey.CreateSubKey(keyPathToCreate)) { runOnceExKey.SetValue("foo", "bar"); Console.WriteLine("Was able to create {0} and write a value under it", keyPathToCreate); } } } internal static class RegistryNativeMethods { [Flags] public enum RegSAM { AllAccess = 0x000f003f } private const int REG_PROCESS_APPKEY = 0x00000001; // approximated from pinvoke.net's RegLoadKey and RegOpenKey // NOTE: changed return from long to int so we could do Win32Exception on it [DllImport("advapi32.dll", SetLastError = true)] private static extern int RegLoadAppKey(String hiveFile, out int hKey, RegSAM samDesired, int options, int reserved); public static int RegLoadAppKey(String hiveFile) { int hKey; int rc = RegLoadAppKey(hiveFile, out hKey, RegSAM.AllAccess, REG_PROCESS_APPKEY, 0); if (rc != 0) { throw new Win32Exception(rc, "Failed during RegLoadAppKey of file " + hiveFile); } return hKey; } }

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  • Can a 10-bit monitor connection preserve all tones in 8-bit sRGB gradients on a wide-gamut monitor?

    - by hjb981
    This question is about color management and the use of a higher color depth, 10 bits per channel (30 bits in total, resulting in 1.07 billion colors, or 1024 shades of gray, sometimes referred to as "deep color") compared to the standard of 8 bits per channel (24 bits in total, 16.7 million colors, 256 shades of gray, sometimes referred to as "true color"). Do not confuse with "32 bit color", which usually refers to standard 8 bit color with an extra channel ("alpha channel") for transparency (used to achieve effects like semi-transparent windows etc). The following can be assumed to be in place: 1: A wide-gamut monitor that supports 10-bit input. Further, it can be assumed that the monitor has been calibrated to its native gamut and that an ICC color profile has been created. 2: A graphics card that supports 10-bit output (and is connected to the monitor via DisplayPort). 3: Drivers for the graphics card that support 10-bit output. If applications that support 10-bit output and color profiles would be used, I would expect them to display images that were saved using different color spaces correctly. For example, both an sRGB and an adobeRGB image should be displayed correctly. If an sRGB image was saved using 8 bits per channel (almost always the case), then the 10-bit signal path would ensure that no tonal gradients were lost in the conversion from the sRGB of the image to the native color space of the monitor. For example: If the image contains a pixel that is pure red in 8 bits (255,0,0), the corresponding value in 10 bits would be (1023,0,0). However, since the monitor has a larger color space than sRGB, sending the signal (1023,0,0) to the monitor would result in a red that was too saturated. Therefore, according to the ICC color profile, the signal would be transformed into a different value with less red saturation, for example (987,0,0). Since there are still plenty of levels left between 0 and 987, all 256 values (0-255) for red in the sRGB color space of the file could be uniquely mapped to color-corrected 10-bit values in the monitor's native color space. However, if the conversion was done in 8 bits, (255,0,0) would be translated to (246,0,0), and there would now only be 247 available levels for the red channel instead of 256, degrading the displayed image quality. My question is: how does this work on Ubuntu? Let's say that I use Firefox (which is color-aware and uses ICC color profiles). Would I get 10-bit processing, thus preserving all levels of an 8-bit picture? What is the situation like for other applications, especially photo applications like Shotwell, Rawtherapee, Darktable, RawStudio, Photivo etc? Does Ubuntu differ from other operating systems (Linux and others) on this point?

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  • How does Photoshop (Or drawing programs) blit?

    - by user146780
    I'm getting ready to make a drawing application in Windows. I'm just wondering, do drawing programs have a memory bitmap which they lock, then set each pixel, then blit? I don't understand how Photoshop can move entire layers without lag or flicker without using hardware acceleration. Also in a program like Expression Design, I could have 200 shapes and move them around all at once with no lag. I'm really wondering how this can be done without GPU help. I don't think super efficient algorithms could justify that? Thanks

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  • 32 bit dll importing in 64 bit .Net application

    - by scatterbraiin
    hello i'm having a problem, i try to solve it since yesterday but no luck. i have 32 bit delphi dll which i want to import in .NET Win Application. this application has to be built on ANY CPU mode. of course, there's BadImageFormatException coming, which means that in x64 application can't be loaded x86 dll.. i googled around and find solution, it said i have to do wrapper, but it wasn't clear for me. can anybody tell how to solve this problem, is there any possible way i can import 32bit Delphi dll in program builted Any CPU or x64 mode(maybe another solution).

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  • Xcode & 64 bit & 32 bit Question

    - by I00I
    Hello All, I have a 32bit iMac that I am writing an iPhone app in Xcode with, and I was wondering if I saved my project to a flash drive and dropped it on my MacBookPro which is 64 bit and continued to code the iPhone project on my laptop in Xcode would this cause a problem? I don't see how it would since the target is not for either of those computers, but I thought I would ask since I would like to work on the project when I am not always around my iMac. Are there any gottcha's with doing this that I should look out for? Thanks, I00I

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