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new a31f7b7988d Documentation/math: explain that KissFFT is a small FFT
library
a31f7b7988d is described below
commit a31f7b7988dcf20f2460611f49fde4de343ba098
Author: Abhishek Mishra <[email protected]>
AuthorDate: Sun Sep 20 13:06:55 2026 +0000
Documentation/math: explain that KissFFT is a small FFT library
Follow-up to apache/nuttx#20194. The KissFFT page only described how
NuttX vendors the package. State that it is a small open-source FFT
implementation used in many embedded projects.
Signed-off-by: Abhishek Mishra <[email protected]>
---
Documentation/applications/math/kissfft/index.rst | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/applications/math/kissfft/index.rst
b/Documentation/applications/math/kissfft/index.rst
index fcae4fd94e6..9ce5554cbb1 100644
--- a/Documentation/applications/math/kissfft/index.rst
+++ b/Documentation/applications/math/kissfft/index.rst
@@ -2,6 +2,11 @@
``kissfft`` KissFFT
===================
+KissFFT is a small open-source Fast Fourier Transform (FFT) library
+("Keep It Simple, Stupid") used in many embedded projects. It provides
+mixed-radix complex FFTs and a real-input helper, with floating-point
+or fixed-point types and a BSD license that is easy to vendor.
+
``apps/math/kissfft`` vendors `KissFFT
<https://github.com/mborgerding/kissfft>`_ (tag ``v130``) and applies
``kissfft.patch``. It compiles ``kiss_fft.c`` and ``tools/kiss_fftr.c``.
