A JIT assembler for x86/x64 architectures supporting advanced instruction sets up to AVX10.2

• Install
• Usage
• Changelog

Xbyak is a C++ header-only library that enables dynamic assembly of x86/x64 instructions using mnemonics.

The pronunciation of Xbyak is /kʌɪbjæk/ (kai-byak).

The name is derived from the Japanese word 開闢 (kaibyaku), which means "the beginning of the world" or "creation".

• Header-only library
• Intel/MASM-like syntax
• Full support for AVX-512, APX, and AVX10.2

Note: Use and_(), or_(), ... instead of and(), or(). If you want to use them, then specify -fno-operator-names option to gcc/clang.

• Xbyak_aarch64 : for AArch64
• Xbyak_riscv : for RISC-V

• Support AVX10.2
• Support xresldtrk/xsusldtrk
• Support RAO-INT for APX
• Support AVX10 detection, AESKLE, WIDE_KL, KEYLOCKER, KEYLOCKER_WIDE
• Support APX except for a few instructions
• Add amx_fp16/avx_vnni_int8/avx_ne_convert/avx-ifma
• Add movdiri, movdir64b, clwb, cldemote
• WAITPKG instructions (tpause, umonitor, umwait) are supported.
• MmapAllocator supports memfd with user-defined strings. see sample/memfd.cpp
• Strictly check address offset disp32 in a signed 32-bit integer. e.g., ptr[(void*)0xffffffff] causes an error.
  • Define XBYAK_OLD_DISP_CHECK if you need an old check, but the option will be remoevd.
• Add jmp(mem, T_FAR), call(mem, T_FAR) retf() for far absolute indirect jump.
• VNNI instructions such as vpdpbusd supports vex encoding.
• (Break backward compatibility) push(byte, imm) (resp. push(word, imm)) forces to cast imm to 8(resp. 16) bit.
• (Windows) #include <winsock2.h> has been removed from xbyak.h, so add it explicitly if you need it.
• Support exception-less mode see. Exception-less mode
• XBYAK_USE_MMAP_ALLOCATOR will be defined on Linux/macOS unless XBYAK_DONT_USE_MMAP_ALLOCATOR is defined.

• Windows (Xp, Vista, 7, 10, 11) (32 / 64 bit)
• Linux (32 / 64 bit)
• macOS (Intel CPU)

Almost C++03 or later compilers for x86/x64 such as Visual Studio, g++, clang++, Intel C++ compiler and g++ on mingw/cygwin.

• Intel 64 and IA-32 Architectures Software Developer Manuals
• Intel Advanced Performance Extensions (Intel APX) Architecture Specification
• Intel Advanced Vector Extensions 10.2 (Intel AVX10.2) Architecture Specification
• Intel Architecture Instruction Set Extensions Programming Reference
• Intel Software Development Emulator

BSD-3-Clause License

GitHub | Website (Japanese) | herumi@nifty.com

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