bit-manipulation

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How to set the 513th bit of a char[1024] in C?

I was recently asked in an in开发者_StackOverflow社区terview how to set the 513th bit of a char[1024] in C, but I\'m unsure how to approach the problem. I saw How do you set, clear, and toggle a singl[详细]

2023-04-13 00:38 分类：问答
determine power of number

i knowthat if number is power of two,then it must satisfy (x&(x-1))=0; for example let\'s take x=16 or 10000 x-16=10000-1=01111 and (x&(x-1))=0;for another non power number 7 for example, 7=01[详细]

2023-04-13 00:11 分类：问答
First assembly program error "too many references for mov"

In the following assembly code I am trying to implement a multiplication method using bitwise shifts etc but I am getting two errors over and over, \"too many memory references for \'mov\'\" as well a[详细]

2023-04-12 21:47 分类：问答
Performance gains from fast multiplication with bit shifting

I have been reading a lot of articles lately about programming practice, design and so forth and was curious about the real performance gains from implementing multiplication as bit shifting.[详细]

2023-04-12 15:04 分类：问答
Translate and explain some C++ bit operations to C#

Can you help me with the translation to c# of this 3rd part API method: I also didnt understand everything that is happening at the bit operations..[详细]

2023-04-12 10:37 分类：问答
Is it possible to rewrite modulo (2^n - 1) using bitwise and restricted operators

For unsigned int x, is it possible to calculate x % 255 (or 2^n - 1 in general) using only the following开发者_JAVA百科 operators (plus no loop, branch or function call)?[详细]

2023-04-12 02:12 分类：问答
Convert an Int to an array of Ints indicating positions of bits in C [closed]

Closed. This question needs details or clarity. It is not currently accepting answers. 开发者_Python百科[详细]

2023-04-11 23:04 分类：问答
Why does this function not work for negative numbers?

I an using the following function to calculat开发者_JS百科e the set bits in an integer, and it works for positive numbers, but not for negative numbers. Can anyone explain why?[详细]

2023-04-11 16:18 分类：问答
How to obtain the next Power Of Two of a given number? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: bit twiddling: find next power of two[详细]

2023-04-11 15:35 分类：问答
DWord operations in Ruby

I\'m looking for ways of converting an array of byte values in DWord using Ruby. For example: [255,1,255,2] -> 11111111 00000001 11111111 000000010[详细]

2023-04-11 07:36 分类：问答