Expand documentation of implementation details.

diff --git a/src/lib/nano-pow/shaders/gpu-compute.ts b/src/lib/nano-pow/shaders/gpu-compute.ts
index 0fcf82e829b949e32846fc958354bcb11ac5e0d0..ffe81830a23ad73bf34524c56fd5934628236a5b 100644 (file)
--- a/src/lib/nano-pow/shaders/gpu-compute.ts
+++ b/src/lib/nano-pow/shaders/gpu-compute.ts
@@ -194,7 +194,10 @@ fn main(
        var v31: u32 = 0x5BE0CD19u;
 
        /**
-       * Twelve rounds of G mixing as part of BLAKE2b compression step
+       * Twelve rounds of G mixing as part of BLAKE2b compression step.
+       * Each sigma r index correlates with the reference implementation, but each
+       * sigma i index, and each v index, is doubled due to using two u32 array
+       * elements to represent one uint64_t.
        */
        var o0: u32;
        var o1: u32;