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-rw-r--r--docs/dev/bnil-overview.md10
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diff --git a/docs/dev/bnil-overview.md b/docs/dev/bnil-overview.md
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@@ -45,6 +45,16 @@ Note that floating point IL instructions have their own possible size suffixes:
.s -- Single (4 bytes)
.d -- Double (8 bytes)
.t -- Ten (10 bytes)
+.o -- Oword (16 bytes)
+```
+
+Additionally, floating point IL operations are indicated with a prefixed `f`, like:
+
+```
+f* -- Floating-point multiplication
+f/ -- Floating-point division
+f+ -- Floating-point addition
+f- -- Floating-point subtraction
```
### Variable Offsets