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lkcl
<lkcl@web>
Sat, 12 Dec 2020 09:46:41 +0000
(09:46 +0000)
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IkiWiki
<ikiwiki.info>
Sat, 12 Dec 2020 09:46:41 +0000
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openpower/sv/svp_rewrite/svp64/discussion.mdwn
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diff --git
a/openpower/sv/svp_rewrite/svp64/discussion.mdwn
b/openpower/sv/svp_rewrite/svp64/discussion.mdwn
index 959bdb740428ae67569085b5f46d8785463de1b2..f72d8174111a28ed5f10f8a5cbca1414874ca4a2 100644
(file)
--- a/
openpower/sv/svp_rewrite/svp64/discussion.mdwn
+++ b/
openpower/sv/svp_rewrite/svp64/discussion.mdwn
@@
-67,7
+67,10
@@
For 2 op (dest/src1/src2) the tag may be 3 bits: total 9 bits. for 3 op (dest/s
Note:
-* saturation is done on the result at the **source** elwidth
+* for saturation the operation is done at the **source** width
+ (this is different from normal elwidth overrides which
+ are done at the **dest** width)
+* saturation is done on the result at the **dest** elwidth
* signed-saturation causes sign-extension from source to dest elwidths **after** saturation
# Notes about rounding, clamp and saturate