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Shall I use register class variables in modern C programs?


By : Vasiliy Korobatoff
Date : September 17 2020, 01:00 AM
around this issue There is no benefit to using register. Modern compilers substantially ignore it — they can handle register allocation better than you can. The only thing it prevents is taking the address of the variable, which is not a significant benefit.
None of my own code uses register any more. The code I work on loses register when I get to work on a file — but it takes time to get through 17,000+ files (and I only change a file when I have an external reason to change it — but it can be a flimsy reason).
code :


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Win8: How do programs like OblyTile and Modern Tile Maker assign tiles to non-Metro app shorcuts?


By : K. Doyle
Date : March 29 2020, 07:55 AM
wish helps you There are a few things going on here:
1) You can view the source code for OblyApp by downloading ILSpy: http://ilspy.net/
code :
On Error Resume Next
Set objShell = CreateObject("Wscript.Shell")
Set objFSO = CreateObject("Scripting.FileSystemObject")
strApp = "<path to executable>"

arrPath = Split(strApp, "\")

For i = 0 to Ubound(arrPath) - 1
    strAppPath = strAppPath & arrPath(i) & "\"
Next 

objShell.CurrentDirectory = strAppPath
objShell.Run """<path to executable>""" & ""
If Err.Number <> 0 Then
  If InStr(1, strApp, "/") > 0 then
  Else
      If InStr(1, strApp, "www.") > 0 then
      Else
          If InStr(1, strApp, "shell:") > 0 then
          Else
              If objFSO.folderExists(strApp) Then
              Else
                  If objFSO.FileExists(strApp) Then
                  Else
                      MsgBox strApp & " not found", 16, "OblyTile"
                  End If
              End If
          End If
      End If
  End If
Err.Clear
End If

OpenGL Separable shader programs and pipline performance on modern hardware


By : user4310377
Date : March 29 2020, 07:55 AM
may help you . It is funny you should mention D3D11 hardware by name.
If you talk about D3D, you should know it has always worked this way. Shader programs are not immutable objects with every stage linked together in D3D like they are in OpenGL. D3D uses semantics and other goodies to let you swap out the shader attached to each stage whenever you want. The hardware has always worked the way D3D does and OpenGL just exposes this better now.

Do every modern implementations of malloc introduce UB in programs?


By : ItzZ'Më RöNy Ðä Emír
Date : March 29 2020, 07:55 AM
To fix the issue you can do
The funny part is that every modern malloc implementation out there will happily reuse allocations that have been previously freed. Does that mean that they all introduce UB into C programs?
code :
T *ptr = malloc( sizeof *ptr * N );
...
free( ptr );
ptr = malloc( sizeof *ptr * N );

How many EAX register do modern processor have?


By : user4780368
Date : March 29 2020, 07:55 AM
wish helps you These are logical register names. You are right in assuming each running thread has a single RAX value valid at any given point in the program (by the way - with hyperthreading this means two per core), but in fact modern HW doesn't hold a single value but multiple ones.
A modern out of order CPU will attempt to perform instructions based on source readiness, so for the next program for e.g.:

In C Programming Language , where(i.e. in which register of the microprocessor) are the register storage class variables


By : maxdiable
Date : March 29 2020, 07:55 AM
it fixes the issue register is an suggestion to the compiler that it might want to place the specified variable in a register.
It is not a command that it must put it in a register.
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