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New posts in x86-64
Fastest way to set highest order bit of rax register to lowest order bit in rdx register
Oct 23, 2025
assembly
optimization
bit-manipulation
x86-64
micro-optimization
Is resb 2 equivalent to resw 1?
Oct 22, 2025
assembly
x86-64
nasm
First use of AVX 256-bit vectors slows down 128-bit vector and AVX scalar ops
Oct 23, 2025
assembly
x86-64
sse
simd
avx
Questions about APIC interrupt
Oct 23, 2025
assembly
operating-system
x86-64
apic
Why Assembly x86_64 syscall parameters are not in alphabetical order like i386
Oct 22, 2025
assembly
x86
x86-64
cpu-registers
calling-convention
Speeding up a bit test operation by using assembly
Oct 23, 2025
c++
performance
assembly
x86-64
compiler-optimization
NASM should I pop function argument after calling a function?
Oct 22, 2025
assembly
x86-64
nasm
callstack
calling-convention
How does one opcode byte decode to different instructions depending on the "register/opcode" field? What is that? [duplicate]
Oct 21, 2025
assembly
x86-64
disassembly
machine-code
Assembly call to printf - different behavior on WSL and standalone Ubuntu 18.04 64bit
Oct 21, 2025
assembly
printf
x86-64
windows-subsystem-for-linux
What happens when you execute an instruction that your CPU does not support?
Oct 20, 2025
linux
x86-64
avx
Why do i get `** stack smashing detected **` error?
Oct 21, 2025
c++
assembly
x86-64
What does fs:0x30 provide in Linux?
Oct 19, 2025
assembly
x86-64
reverse-engineering
glibc
thread-local-storage
What is the "sub $16, %rsp" instruction being used for?
Oct 21, 2025
assembly
gcc
x86-64
calling-convention
Why can't we move directly 1 byte from stack's frame to register?
Oct 21, 2025
gcc
assembly
x86-64
calling-convention
function-parameter
Why does this simple assembly program work in AT&T syntax but not Intel syntax?
Oct 20, 2025
linux
gcc
assembly
clang
x86-64
Missing instruction `_mm_crc32_u64` when installing clickhouse-cityhash on OSX 10.14.5
Oct 20, 2025
python
c++
x86-64
intrinsics
clickhouse
Memory argument of VMOVDQU partially out of allocated range
Oct 19, 2025
assembly
x86-64
simd
access-violation
avx
Are there performance advantages of 32 bit apps over 64 bit ones, on x86-64?
Oct 20, 2025
performance
x86
x86-64
32bit-64bit
Returning a struct in SystemV ABI
Oct 18, 2025
c
assembly
x86-64
calling-convention
abi
Is there any way to save registers before jumping into function?
Oct 20, 2025
c
assembly
visual-c++
x86-64
calling-convention
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