cmd/compile: intrinsic for math/bits.Reverse on ARM64
I don't know that it exists for any other architectures.
Update #18616
Change-Id: Idfe5dee251764d32787915889ec0be4bebc5be24
Reviewed-on: https://go-review.googlesource.com/38323
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go
index b4c2a01..a5ac628 100644
--- a/src/cmd/compile/internal/ssa/gen/genericOps.go
+++ b/src/cmd/compile/internal/ssa/gen/genericOps.go
@@ -244,6 +244,11 @@
{name: "Bswap32", argLength: 1}, // Swap bytes
{name: "Bswap64", argLength: 1}, // Swap bytes
+ {name: "BitRev8", argLength: 1}, // Reverse the bits in arg[0]
+ {name: "BitRev16", argLength: 1}, // Reverse the bits in arg[0]
+ {name: "BitRev32", argLength: 1}, // Reverse the bits in arg[0]
+ {name: "BitRev64", argLength: 1}, // Reverse the bits in arg[0]
+
{name: "Sqrt", argLength: 1}, // sqrt(arg0), float64 only
// Data movement, max argument length for Phi is indefinite so just pick
