From: lkcl <lkcl@web>
Date: Tue, 8 Dec 2020 19:06:00 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~1464
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=03a47df9f8d16910a3ab6375417d0a800f0d1915;p=libreriscv.git

---

diff --git a/openpower/sv/av_opcodes.mdwn b/openpower/sv/av_opcodes.mdwn
index 1e6539ed9..454daa27a 100644
--- a/openpower/sv/av_opcodes.mdwn
+++ b/openpower/sv/av_opcodes.mdwn
@@ -20,7 +20,14 @@ Thus for example, where OpenPOWER VSX has vpkswss, this would be achieved in SV
 * 2nd op, swizzle-select vec2 "select Y only" from source to dest
   dest.Y = extclamp(src.Y)
 
-Macro-op fusion may be used to detect that these two interleave cleanly.
+Macro-op fusion may be used to detect that these two interleave cleanly, overlapping the vec2.X with vec2.Y to produce a single vec2.XY operation.
+
+## Scalar element operations
+
+* clamping / saturation for signed and unsigned.  best done similar to FP rounding modes, i.e. with an SPR.
+* average-add.  result = (src1 + src2 + 1) >> 1
+* abs-diff: result = (src1 > src2) ? (src1-src2) : (src2-src1)
+* signed min/max
 
 # Video