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98% of your CPU in just 30 instructions !

You write C, C++, or Rust. You compile every day without reading the objdump output. What if just thirty instructions accounted for 98% of what your processor actually does?

Crystal Clear Machine Language is a guided tour of x86-64 assembly through human analogies. Each instruction is introduced as a trade — and only then unfolded into its technical reality.

• MOV is a logistician — moves bytes, computes nothing.
• ADD is an accountant — sums and marks the margin.
• CMP is a judge — compares without verdict, leaves the verdict to the flags.
• LEA is a surveyor — computes addresses, never reads memory.
• CALL is a diplomat — saves the return address before crossing the border.
• FMA is a calligrapher — fuses multiplication and addition in a single stroke.

• Read x86-64 assembly fluently with the 30 instructions that cover 98% of real-world execution.
• Understand registers, the stack, RFLAGS, addressing modes, and the System V AMD64 ABI.
• See why -O0 and -O2 produce dramatically different assembly — and learn to read both.
• Master pipelines, register renaming, out-of-order execution, branch prediction, and the cache hierarchy.
• Use SIMD safely: MOVAPS, MOVDQA, FMA, and the alignment rules that make or break vectorization.
• Step into Linux syscalls and the optimization method professionals use.

• A1 — Cheat sheets: flag effects, Jcc/CMOVcc/SETcc tables, addressing patterns.
• A2 — Registers and the ABI: caller-saved, callee-saved, the red zone.
• A3 — Addressing modes: RIP-relative, scaled-index, displacement.
• A4 — Mind maps for every instruction family.
• A5 — Workshop solutions to every exercise.
• A6 — Complete C-to-assembly glossary.

Intermediate developers, computer-science students, curious engineers, and self-taught programmers who want a direct, confident relationship with what happens at the heart of their machines. No prior assembly experience required — only a working knowledge of C and curiosity about the CPU.

No exhaustive instruction reference (the Intel SDM is 5,000 pages — this book points to the right page when you need it). No untested claims about performance: every latency and throughput figure is sourced from Agner Fog, Intel/AMD manuals, or uops.info.

Dr Olivier Ami is a physician and long-time computer-systems enthusiast who has followed x86 from the early 16-bit processors to today's x86-64.

Start reading what your machine actually runs.

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