asmjit, a C++ library that generates machine code.
fasm, the flat assembler.
AVX512: ternary functions evaluation, by Wojciech Muła.
Portable ternary logic procedures, how to emulate specific cases of vpternlog with other instructions, by Wojciech Muła.
GCC's assembler syntax, introduction by Félix Cloutier.
GCC Extended Asm, the official documentation.
asmgrid table by asmjit.
Intel Intrinsics Guide for C and C++.
uops.info table of latency and throughput.
x86 instruction reference by Félix Cloutier.
X86 Opcode and Instruction Reference by MazeGen.