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Update readme #550

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12 changes: 9 additions & 3 deletions README.md
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Expand Up @@ -77,10 +77,16 @@ The x86-64 SSE2 builds will work on all x86-64 machines, but it is the slowest
of the three. The other two require extended CPU instruction set support which
is not universally available, but each step gains ~15% more performance.

For Arm, if binaries are available, we provide:
For Arm we provide, in order of increasing performance:

* `astcenc-sve_256` - uses 256-bit SVE
* `astcenc-sve_128` - uses 128-bit SVE
* `astcenc-neon` - uses NEON

Note: The Arm Scalable Vector Extensions (SVE) allow CPUs to have a variable
vector length. The astcenc implementation is not written in a length-agnostic
style and requires the binary to match the vector length on the host CPU.

## macOS

For macOS devices we provide a single universal binary `astcenc`, which allows
Expand Down Expand Up @@ -235,10 +241,10 @@ or general mobile graphics development or technology please submit them on the

- - -

_Copyright © 2013-2024, Arm Limited and contributors. All rights reserved._
_Copyright © 2013-2025, Arm Limited and contributors. All rights reserved._

[1]: ./Docs/FormatOverview.md
[2]: https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#ASTC
[2]: https://www.khronos.org/registry/DataFormat/specs/1.4/dataformat.1.4.html#ASTC
[3]: https://github.com/ARM-software/astc-encoder/releases
[4]: https://community.arm.com/support-forums/f/graphics-gaming-and-vr-forum/
[5]: https://developer.arm.com/documentation/102162/latest/?lang=en
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