From: lkcl <lkcl@web>
Date: Sat, 9 Oct 2021 10:49:46 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~3689
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9ba99cd987fdbda41515c2c538508cf8193e8f1c;p=libreriscv.git

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diff --git a/3d_gpu/architecture/dynamic_simd/shape.mdwn b/3d_gpu/architecture/dynamic_simd/shape.mdwn
new file mode 100644
index 000000000..d59451a0b
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+++ b/3d_gpu/architecture/dynamic_simd/shape.mdwn
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+# SimdShape
+
+A logical extension of the nmigen `ast.Shape` concept, `SimdShape`
+provides sufficient context to both define overrides for individual lengths
+on a per-mask basis as well as sufficient information to "upcast"
+back to a SimdSignal, in exactly the same way that c++ virtual base
+class upcasting works when RTTI (Run Time Type Information) works.