Top "X86" questions

x86 is an architecture derived from the Intel 8086 CPU.

What does the MOVZBL instruction do in IA-32 AT&T syntax?

What exactly does this instruction do? movzbl 0x01(%eax,%ecx), %eax

assembly x86 att zero-extension
Change target CPU settings in Visual Studio 2010 Express

I wish to change the target CPU settings from "Any CPU" to "x86" in Visual Studio 2010. I read on another …

visual-studio visual-studio-2010 x86 anycpu
Weird MSC 8.0 error: "The value of ESP was not properly saved across a function call..."

We recently attempted to break apart some of our Visual Studio projects into libraries, and everything seemed to compile and …

c++ visual-c++ x86 stack calling-convention
Assembly JLE jmp instruction example

How do you use the jump family of instructions? This is what they've got: JL label "It" jumps if it …

assembly x86 mnemonics
What is the purpose of CS and IP registers in Intel 8086 assembly?

So, as the question states, what is the purpose of CS and IP registers in intel's 8086 I found this explanation: …

x86 intel x86-16
fastest way to negate a number

I was thinking this morning here, what would be the fastest way to reverse a number of positive to negative …

c++ visual-c++ x86 micro-optimization visual-c++-2012
Header files for x86 SIMD intrinsics

Which header files provide the intrinsics for the different x86 SIMD instruction set extensions (MMX, SSE, AVX, ...)? It seems impossible …

x86 header-files sse simd intrinsics
What causes page faults?

According to Wikipedia: A page fault is a trap to the software raised by the hardware when a program accesses …

windows x86 paging x86-64
/usr/bin/ld: skipping incompatible foo.so when searching for foo

I am using Ubuntu 13.10 64bit and I am getting the following errors while compiling the python wrappers of vlfeat library. …

linux gcc x86 32bit-64bit vlfeat
How to get the CPU cycle count in x86_64 from C++?

I saw this post on SO which contains C code to get the latest CPU Cycle count: CPU Cycle count …

c++ c performance x86 rdtsc