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lkcl
<lkcl@web>
Sat, 9 Apr 2022 21:31:13 +0000
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IkiWiki
<ikiwiki.info>
Sat, 9 Apr 2022 21:31:13 +0000
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openpower/sv/svp64/appendix.mdwn
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diff --git
a/openpower/sv/svp64/appendix.mdwn
b/openpower/sv/svp64/appendix.mdwn
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openpower/sv/svp64/appendix.mdwn
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openpower/sv/svp64/appendix.mdwn
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-223,6
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@@
This is equivalent to
`llvm.masked.compressstore.*`
followed by
`llvm.masked.expandload.*`
+with a single instruction.
+
+This extreme power and flexibility comes down to the fact that SVP64
+is not actually a Vector ISA: it is a loop-abstraction-concept that
+is applied *in general* to Scalar operations, just like the x86
+`REP` instruction (if put on steroids).
# Reduce modes