harold

http://haroldbot.nl

My other site: bitmath.blogsplot.com

First holder of a silver bit-manipulation badge.

Always check the asm. Especially if you use System.Numerics.Vectors, it does unexpectedly crazy things all the time.

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Why does breaking the "output dependency" of LZCNT matter?

performance assembly x86 cpu-architecture micro-optimization asked Jan 27, 2014 at 19:45

stackoverflow.com

34 votes

Why are AND instructions generated?

c# .net assembly asked Mar 28, 2012 at 10:31

stackoverflow.com

28 votes

Minimum exact cover of grid with squares; extra cuts

algorithm linear-programming integer-programming asked Jun 13, 2015 at 12:24

stackoverflow.com

26 votes

Why does double.Parse ignore the sign of zero?

c# asked Jun 25, 2011 at 16:11

stackoverflow.com

14 votes

Is there a penalty when base+offset is in a different page than the base?

performance assembly x86 micro-optimization asked Sep 16, 2018 at 6:01

stackoverflow.com

9 votes

Weird result from unchecked(), possible compiler bug?

c# casting unchecked asked Jul 30, 2011 at 14:03

stackoverflow.com

8 votes

Can a shift using the CL register result in a partial register stall?

performance assembly x86 bit-shift asked Oct 27, 2012 at 20:00

stackoverflow.com

7 votes

Minimal addition-chain exponentiation

algorithm np-complete exponentiation asked Sep 7, 2011 at 8:15

stackoverflow.com

6 votes

4×4 cofactor in SSE

c++ performance matrix simd sse asked Aug 6, 2019 at 14:00

codereview.stackexchange.com

5 votes

Algorithm to compute join in zero suppressed binary decision diagram

algorithm binary-decision-diagram asked Aug 30, 2011 at 11:17

stackoverflow.com

Top Answers

165

Why does this random value have a 25/75 distribution instead of 50/50?

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124

Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?

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What is amortized analysis of algorithms?

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How do I check if a zero is positive or negative?

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Java storing two ints in a long

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Difference between JA and JG in assembly

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Floating Point XOR

codegolf.stackexchange.com

Find the lowest set bit

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XOR multiplication

codegolf.stackexchange.com

Set the leading zero bits in any size integer C++

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How is if-statement and bitwise operations same in this example?

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How is conditional jump implemented in the CPU?

cs.stackexchange.com

Given a 32 bit number, what is an efficient way to scale each byte by a certain factor?

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How slow (how many cycles) is calculating a square root?

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Loading military units into ships optimally, using backtracking

codereview.stackexchange.com

How to write and executable Windows .exe manually (machine code with Hex editor)?

stackoverflow.com

Bitwise endian swap for various types

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Branchless K-means (or other optimizations)

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What does (number & -number) mean in bit programming?

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n is negative, positive or zero? return 1, 2, or 4

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How to efficiently count the highest power of 2 that is less than or equal to a given number?

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Radix2 Fast Fourier Transform implemented in C++

codereview.stackexchange.com

How to construct XOR gate using only 4 NAND gate?

cs.stackexchange.com

Should I use i32 or i64 on 64bit machine?

stackoverflow.com

Why HashMap insert new Node on index (n - 1) & hash?

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Bitwise - How can I check if a binary number contains another?

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Shift masked bits to the lsb

stackoverflow.com

Reliable information about x86 string instruction performance?

stackoverflow.com

Naïve RSA decryption in Python

codereview.stackexchange.com

Why is IL.Emit method adding additional nop instructions?

stackoverflow.com