Intel® 64 and IA-32 Architectures Software Developer Manuals
www.intel.com/content/www/us/en/developer/articles/technical/intel-sdm.html-
Vol 2, ch. 2: Instruction format
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II.2.1.3: ModR/M and SIB bytes
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II.2.1.5: Encoding of ModR/M and SIB bytes
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Tb. 2-2, Tb. 2-3: 32-bit tables
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II.2.2: 64-bit, aka "IA-32E", REX prefix
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Vol 2, ch. 3–6: Specific instruction references
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Vol 2, ch. 3.1: How to interpret instruction tables
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Vol 2, appendix B: Examples of encodings
See also:
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Table overview: http://ref.x86asm.net/coder64-abc.html (https://links.johv.dk/293)