Good reference for x86 assembly instructions [closed]

Answer 1

http://www.felixcloutier.com/x86/

Generated from the Intel® 64 and IA-32 Architectures Software Developer’s Manual, volumes 2A and 2B.

Includes AVX version of SSE instructions.

More info at Github zneak/x86doc.

Answer 2

Here is another: http://ref.x86asm.net/

Answer 3

You might want to have a look at the Intel Architecture Developer's Manuals, especially volume 1 (basic architecture) and volumes 2A and 2B (instruction set reference).