More Related Contents:
- Why is the loop instruction slow? Couldn’t Intel have implemented it efficiently?
- Micro fusion and addressing modes
- Why doesn’t GCC use partial registers?
- Can x86’s MOV really be “free”? Why can’t I reproduce this at all?
- How exactly do partial registers on Haswell/Skylake perform? Writing AL seems to have a false dependency on RAX, and AH is inconsistent
- Enhanced REP MOVSB for memcpy
- How many CPU cycles are needed for each assembly instruction?
- Adding a redundant assignment speeds up code when compiled without optimization
- Why isn’t movl from memory to memory allowed?
- Understanding the impact of lfence on a loop with two long dependency chains, for increasing lengths
- Why does breaking the “output dependency” of LZCNT matter?
- What is the stack engine in the Sandybridge microarchitecture?
- What is the “FS”/”GS” register intended for?
- What is a Partial Flag Stall?
- Does lock xchg have the same behavior as mfence?
- What setup does REP do?
- Slow jmp-instruction
- 32-byte aligned routine does not fit the uops cache
- Does an x86 CPU reorder instructions?
- What’s the purpose of the rotate instructions (ROL, RCL on x86)?
- Assembly – How to score a CPU instruction by latency and throughput
- Why flush the pipeline for Memory Order Violation caused by other logical processors?
- Why does Intel hide internal RISC core in their processors?
- Assembly ADC (Add with carry) to C++
- Why isn’t the instruction pointer a normal register usable with MOV or ADD?
- What is instruction fusion in contemporary x86 processors?
- x86 32 bit opcodes that differ in x86-x64 or entirely removed
- Is a mov to a segmentation register slower than a mov to a general purpose register?
- How does the CPU know how many bytes it should read for the next instruction, considering instructions have different lengths?
- Is processor can do memory and arithmetic operation at the same time?