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The SSE4.1 packusdw instruction combines source and destination vectors of signed 32-bit integers into a single vector of unsigned 16-bit integers, with unsigned saturation. When the source and destination are the same register, this means each 32-bit element of that register is used twice as an input, to produce two of the 16-bit output elements, and so if the operation is carried out element-by-element in-place, no matter what the order in which it is applied to the elements, the first element's operation will overwrite some future input. The helper for packssdw avoids this issue by computing the result in a local temporary and copying it to the destination at the end; this patch fixes the packusdw helper to do likewise. This fixes three gcc test failures in my GCC 6-based testing. Backports commit 80e19606215d4df370dfe8fe21c558a129f00f0b from qemu |
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install-cmocka-linux.sh | ||
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msvc.bat | ||
pkgconfig.mk | ||
README.md | ||
uc.c | ||
windows_export.bat |
Unicorn Engine
Unicorn is a lightweight, multi-platform, multi-architecture CPU emulator framework based on QEMU.
Unicorn offers some unparalleled features:
- Multi-architecture: ARM, ARM64 (ARMv8), M68K, MIPS, SPARC, and X86 (16, 32, 64-bit)
- Clean/simple/lightweight/intuitive architecture-neutral API
- Implemented in pure C language, with bindings for Crystal, Clojure, Visual Basic, Perl, Rust, Ruby, Python, Java, .NET, Go, Delphi/Free Pascal and Haskell.
- Native support for Windows & *nix (with Mac OSX, Linux, *BSD & Solaris confirmed)
- High performance via Just-In-Time compilation
- Support for fine-grained instrumentation at various levels
- Thread-safety by design
- Distributed under free software license GPLv2
Further information is available at http://www.unicorn-engine.org
License
This project is released under the GPL license.
Compilation & Docs
See docs/COMPILE.md file for how to compile and install Unicorn.
More documentation is available in docs/README.md.
Contact
Contact us via mailing list, email or twitter for any questions.
Contribute
If you want to contribute, please pick up something from our Github issues.
We also maintain a list of more challenged problems in a TODO list.
CREDITS.TXT records important contributors of our project.