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# Xbyak ![Badge Version] [![Badge License]][License] [![Badge Build]][Build Status]
*A C++ JIT assembler for `x86 (IA32)` , `x64(AMD64,x86-64)`*
<br>
---
<div align = 'center'>
**⸢ [Install] ⸥**
**⸢ [Usage] ⸥**
**⸢ [Changelog] ⸥**
</div>
---
<br>
## Abstract
Xbyak is a C++ header library that enables dynamically to assemble x86(IA32), x64(AMD64, x86-64) mnemonic.
The pronunciation of Xbyak is `kəi-bja-k`.
It is named from a Japanese word [開闢](https://translate.google.com/?hl=ja&sl=ja&tl=en&text=%E9%96%8B%E9%97%A2&op=translate), which means the beginning of the world.
<br>
## Feature
* header file only
* Intel/MASM like syntax
* fully support AVX-512
**Note**:
Use `and_()`, `or_()`, ... instead of `and()`, `or()`.
If you want to use them, then specify `-fno-operator-names` option to gcc/clang.
<br>
### News
- 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](#exception-less-mode)
- `XBYAK_USE_MMAP_ALLOCATOR` will be defined on Linux/macOS unless `XBYAK_DONT_USE_MMAP_ALLOCATOR` is defined.
<br>
### Supported OS
- **Windows** ( `Xp` , `Vista` , `7` , `10` *32 / 64 bit* )
- **MacOS** ( *Intel* )
- **Linux** ( *32 / 64 bit* )
<br>
### Supported Compilers
Almost C++03 or later compilers for x86/x64 such as Visual Studio, g++, clang++, Intel C++ compiler and g++ on mingw/cygwin.
<br>
## Author
#### 光成滋生 Mitsunari Shigeo
**[Github]** | **[Website]** | [herumi@nifty.com](mailto:herumi@nifty.com)
<!----------------------------------------------------------------------------->
[Badge License]: https://img.shields.io/badge/License-BSD_3--Clause-blue.svg
[Badge Version]: https://img.shields.io/badge/Version_6.04-00B2FF
[Badge Build]: https://github.com/herumi/xbyak/actions/workflows/main.yml/badge.svg
[License]: COPYRIGHT
[Changelog]: Documentation/Changelog.md
[Install]: Documentation/Install.md
[Usage]: Documentation/Usage.md
[Build Status]: https://github.com/herumi/xbyak/actions/workflows/main.yml
[Website]: http://herumi.in.coocan.jp/
[Github]: https://github.com/herumi
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