All about GPR and APX PUSH POP
Evolution of GPR (General-Purpose Register) 16-bit Processors and Segmentation (1978) The IA-32 architecture family was preceded by 16-bit processors, the 80...
Posts by Year
2023
All about APX conditional ISA
Motivation Somtimes branch mispredictions are a major performance limiter in workloads. The bottleneck is data-dependent conditional branches and hard to mit...
All about APX JMPABS
Why do we need JMPABS? JMPABS, which, as the name already suggests, allows jumping to a 64-bit absolute address. Before APX, X86 has 32-bit displacement limi...
All about APX relocation
REX2 Intel® APX introduces a new 2-byte REX2 prefix in order to support 32 general-purpose registers (GPRs).
Reflections on life, marriage and love
What is marriage? Marriage does not solve anything, and problems that existed before marriage will persist after marriage. Marriage is just a contract, mainl...
X86 relocation
What’s relocation Relocations are entries in binaries that are left to be filled later – at link time by the toolchain linker or at runtime by the dynamic li...
2021
X86 Instruction Format
Learn by yourself Intel Software Developer’s Manual The most authoritative and official reference manual Volume 2 out of 4 volumes: Instr...
2019
A Tour To C++ Attribute
内容概要 什么是attribute C++11到C++17的常用attribute介绍 为名空间和枚举型添加attribute C++17新特性：忽略未知的attribute 使用using指令避免名空间的重复书写 Bjarne Stroustrup对attribute的使用建议
A Tour To LLVM IR
内容概要 什么是LLVM IR?如何得到IR? LLVM编译的流程，IR文件之间的链接简介 C++ name mangling的用途，“extern C”作用的极简介绍 IR文件的布局 IR中函数定义的结构，什么是BB，什么是CFG IR是一个强类型语言，如何用工具检查IR的合法性 ...