(no commit message)

diff --git a/openpower/sv/int_fp_mv/appendix.mdwn b/openpower/sv/int_fp_mv/appendix.mdwn
index c730ef38ec6595775af015a6f170b033825f780a..38a341ccfd70e4e74aaabfa4e2ceb61e1a37b9df 100644 (file)
--- a/openpower/sv/int_fp_mv/appendix.mdwn
+++ b/openpower/sv/int_fp_mv/appendix.mdwn
@@ -35,6 +35,10 @@ rather than Double width hardcoded to 64 and Single width
 hardcoded to 32.  This allows a full range of conversions
 between FP64, FP32, FP16 and BF16.
 
+Note however that attempts to perform "Single" operations on
+FP16 elwidths will raise an illegal instruction trap: Half
+of FP16 is FP8, which is not defined as a legal IEEE754 format.
+
 # Simple-V SVP64 Saturation
 
 SVP64 also allows for Saturation, such that the result is truncated