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diff --git a/3d_gpu/architecture/dynamic_simd/slice.mdwn b/3d_gpu/architecture/dynamic_simd/slice.mdwn
index 48cb5a42531cb4356b905a0a2f4e421c84a3a93a..c185e6404f148111f5df8ad4b6c6db9cd2c942ce 100644 (file)
--- a/3d_gpu/architecture/dynamic_simd/slice.mdwn
+++ b/3d_gpu/architecture/dynamic_simd/slice.mdwn
@@ -191,15 +191,20 @@ partition points:
     0b01 x x x x  x AaA9A8 x x x x  x A2A1A0
     0b10 x AeAdAc x AaA9A8 x A6A5A4 x A2A1A0
 
-Now let us take a signal, b, of 2-bit, and the same number of
-PartitionPoints,
-and perform an add operation:
+Now let us take a signal, b, of 2-bit lengths,
+and attempt to perform an add operation:
 
+             |    |    |
+    b    B7B6 B5B3 B3B2 B1B0
 
-    elwid |    | |    | |    | |
-    0b00 x x x  x x x  x x x  x B1B0
-    0b01 x x x  x A9A8 x x x  x A1A0
-    0b10 x AdAc x A9A8 x A5A4 x A1A0
+This is not immediately possible (at least not
+obviously so) and consequently b needs expanding
+to the same padding and PartitionPoints:
+  
+    elwid |      | |      | |      | |
+    0b00 x x x x  x x x x  x x x x  x x B1B0
+    0b01 x x x x  x x B5B4 x x x x  x x B1B0
+    0b10 x x B7B6 x x B5B4 x x B3B2 x x B1B0
 
 Illustrating the case where a Sliced (fixed element width) SimdSignal
 is added to one which has variable-length elements that take up the