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alonamid
2019-09-25 10:20:03 -07:00
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docs/Generators/Hwacha.rst
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@@ -2,7 +2,12 @@ Hwacha
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The Hwacha project is developing a new vector architecture for future computer systems that are constrained in their power and energy consumption.
Inspired by traditional vector machines from the 70s and 80s, and lessons learned from our previous vector-thread architectures Scale and Maven, we are bringing back elegant, performant, and energy-efficient aspects of vector processing to modern data-parallel architectures.
We propose a new vector-fetch architectural paradigm, which focuses on the following aspects for higher performance, better energy efficiency, and lower complexity.
The Hwacha project is inspired by traditional vector machines from the 70s and 80s, and lessons learned from our previous vector-thread architectures such as Scale and Maven
The Hwacha project includes the Hwacha microarchitecture generator, as well as the Hwacha non-standard RISC-V extension. Hwacha does not implement the RISC-V standard vector extension proposal.
For more information, please visit the `Hwacha website <http://hwacha.org/>`__.
For more information on the Hwacha project, please visit the `Hwacha website <http://hwacha.org/>`__.
To add the Hwacha vector unit to an SoC, you should add the ``hwacha.DefaultHwachaConfig`` config mixin to the SoC configurations.
Since Hwacha implements a non-standard RISC-V extension, it requires a unique software toolchain to be able to compile and asseble its vector instructions.
To install the Hwacha toolchain, run the ``./scripts/build-toolchains.sh esp-tools`` command within the root Chipyard directory. This may take a while, and it will install the ``esp-tools-install`` directory within your Chipyard root directory. ``esp-tools`` are a fork of ``riscv-tools`` (formelty a collection of relevant software RISC-V tools) that were enhanced with the additional non-standard vector instructions. However, due to the upstreaming of the equivalent RISC-V toolchains, esp-tools may not be up-to-date with the latest mainline version of the tools included in it.