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- What does this C code do [Duffs device]? - Stack Overflow
Duff's device In computer science, Duff's device is an optimized implementation of a serial copy that uses a technique widely applied in assembly language for loop unwinding Its discovery is credited to Tom Duff in November of 1983, who at the time was working for Lucasfilm
- Using two values for one switch case statement - Stack Overflow
In my code, the program does something depending on the text entered by the user My code looks like: switch (name) { case text1: { blah break; }
- gcc - Is Duffs device still useful? - Stack Overflow
In the Duff's Device case, the target was a memory-mapped register, and the source was an arbitrary pointer Today, the memory-mapped register would likely have to be tagged as volatile and it's not clear whether the compiler could determine whether the source and destination pointers could ever alias
- c - How does Duffs device work? - Stack Overflow
What Duff's device does is implement this idea, in C, but (as you saw on the Wiki) with serial copies What you're seeing above, with the unwound example, is 10 comparisons compared to 100 in the original - this amounts to a minor, but possibly significant, optimisation
- Does Duffs Device Speed up Java Code? - Stack Overflow
A trick known as Duff's device can be used in C or C++ to unroll the loop, but this is not valid code in the Java programming language: Or, more bluntly (from the same section): Great C hack, Tom, but it's not valid here EDIT: To answer your more (too) general question, usually no You should generally rely on the JIT
- Android ColorFilter - Porter-Duff Modes - Stack Overflow
Note that Porter-Duff modes are only defined to work properly with premultiplied alpha That means that none of the R, G or B components can exceed the alpha value GitHub project for the Android project which shows off all the Porter-Duff modes
- graphics - ANDROID: what is the equivalent blend modes (porter duff . . .
I'm trying to create an effect that I saw in an IOS application where the they used a blend mode of color and one of hue, but I couldn't find those blend modes in the PorterDuff modes enum
- Revising the syntax of Duffs device - Is this legal C C++?
Only last night I encountered the curious Duff's device for the first time I've been doing some reading on it, and I don't think it's that daunting to understand What I am curious about is the strange syntax (from Wikipedia):
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