1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

64-bit ARM (AArch64) Support Merged Into LLVM

Compiler

Published on 31 January 2013 10:30 AM EST
Written by Michael Larabel in Compiler
Comment On This Article

GCC has had support for 64-bit ARM, a.k.a. AArch64, going back to last summer for using the open-source compiler with next-generation ARMv8 hardware. Being merged today is finally support for the LLVM compiler infrastructure with an experimental 64-bit ARM/AArch64 back-end target.

Adding fourty-five thousand lines of new code to the LLVM tree is a patch that adds support for ARM's 64-bit architecture to LLVM. This target is currently experimental and not built by default, but requires a compile-time switch for enabling. However, there's already talk amongst developers about enabling 64-bit ARM support by default. This work was merged into mainline LLVM this morning and will thus be found in the LLVM 3.3 release due out in a couple months time.

This initial AArch64 LLVM compiler support covers Assembly for all scalar instructions except for the late addition CRC instructions, code generation features needed for C++0x and C99, compilation support for the small memory model, absolute and position-independent code support, GNU-style TLS, and debugging support.

The 64-bit ARM compiler support, however, has yet to undergo any performance tuning for the greatest compiler performance. With there still being a few months to go until LLVM 3.3 is released, this will likely be achieved before the AArch64 LLVM support is in any released version.

Another limitation is that there isn't any NEON support for the AArch64 experimental target because the developer says there was "an outbreak of batshit insanisty in [ARM's] legal department."

The initial AArch64/ARMv8 instruction set support for LLVM can be found by cloning the LLVM SVN/Git repository where this big patch landed today.

LLVM 3.3 should be a fantastic release since aside from the 64-bit ARM support will also be the AMD Radeon GPU back-end, likely the enabling by default of the new loop vectorizer, and many other features for this open-source compiler infrastructure.

Latest Linux Hardware Reviews
  1. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  2. Overclocking The AMD AM1 Athlon & Sempron APUs
  3. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
  4. Upgraded Kernel & Mesa Yield A Big Boost For Athlon R3 Graphics
Latest Linux Articles
  1. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  2. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
  3. AMD Athlon's R3 Graphics: RadeonSI Gallium3D vs. Catalyst
  4. GCC 4.9 Compiler Optimization Benchmarks For Faster Binaries
Latest Linux News
  1. R600 Gallium3D Disables LLVM Back-End By Default
  2. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  3. Fedora Workstation Is Making Me Quite Excited
  4. Maynard: A Lightweight Wayland Desktop
  5. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  6. KDE 4.13 Is Being Released Today With New Features
  7. Trying Out Radeon R9 290 Graphics On Open-Source
  8. Intel Broadwell GT3 Graphics Have Dual BSD Rings
  9. Early Linux 3.15 Benchmarks Of Intel Core i7 + Radeon
  10. Red Hat Releases Its RHEL 7 Release Candidate
  11. New Features Coming To Xubuntu 14.04 LTS
  12. NVIDIA Officially Releases CUDA 6
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  4. Change installation destination from home directory
  5. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  6. Bye bye BSD, Hello Linux: A Sys Admin's Story
  7. New tool for undervolt/overclock AMD K8L and K10 processors
  8. How to enable opengl 3.3 on r9 270?