bit

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Getting different results in PHP and JS when bit shifting

I\'m getting some odd results where 2 identical functions (one in PHP and one in javascript) are returning different results.[详细]

2023-02-10 04:41 分类：问答
Representing a very large array of bits in little memory

I would like to represent a structure containing 250 M s开发者_开发技巧tates(1 bit each) somehow into as less memory as possible (100 k maximum). The operations on it are set/get. I cold not say that[详细]

2023-02-09 23:43 分类：问答
What is negation (not) of a bit vector in VHDL

What does it mean to do a negation of a bit vector in VHDL? For example if I have 10100111 which is a bit vector called temp and I do something like temp := no开发者_运维知识库t temp what will my outp[详细]

2023-02-08 10:38 分类：问答
Why do I only get 8 digits back? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari[详细]

2023-02-08 01:13 分类：问答
Generic Bit Macros

I\'m looking for generic bit macros (e.g. extracting or setting multiple bits), so that I don\'t have to reinvent them. On NetBSD I found at least 开发者_运维知识库__BIT and __BITS in <sys/cdefs.h&[详细]

2023-02-07 07:24 分类：问答
How to find all "1" bits in a unsigned char bitmapRep[8192]?

Given a unsigned char bitmapRep[8192], how to efficiently find out all \"开发者_运维百科1\" bits\' positions? Thanks.What do you mean by \"find\"?[详细]

2023-02-07 05:55 分类：问答
Swap every pair of bits in byte

This was a question asked by an NVIDIA representative at a career fair: Write small, efficient code to swap every pair of bits inside a byte; for example, 10 11 01 10 should become 01 11 10 01.[详细]

2023-02-06 18:45 分类：问答
How do I Quickly Compare Variable-Length Bit Strings in C++?

I\'m performing comparisons of objects based on the binary presence or absence of a set of features. These features can be represented by a bit string, such as this:[详细]

2023-02-06 15:38 分类：问答
How many Bits were used?

Assume a simple machine uses4 bits to represent it instruction set. How many different instruction can this machine have? How many instruction could it have if eight bit are used? How many if 16 bits[详细]

2023-02-06 02:29 分类：问答
NX bit emulation

Could someone explain to me how the NX bit can be emulated on pla开发者_运维百科tforms such as 32-bit x86 where the hardware doesn\'t provide it? I would be greatful for an explanation of the basics o[详细]

2023-02-05 09:05 分类：问答