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runtime: update mkduff legacy comments
Update comments for duffzero and duffcopy which referred to legacy locations: + cmd/?g/cgen.go + cmd/?g/ggen.go Remnants of the old days when we had 5g, 6g etc. Those locations have since moved to: + cmd/compile/internal/<arch>/cgen.go + cmd/compile/internal/<arch>/ggen.go Change-Id: Ie2ea668559d52d42b747260ea69a6d5b3d70e859 Reviewed-on: https://go-review.googlesource.com/29073 Reviewed-by: Russ Cox <rsc@golang.org>
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@ -8,14 +8,14 @@
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// The compiler jumps to computed addresses within
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// the routine to zero chunks of memory.
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// Do not change duffzero without also
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// changing clearfat in cmd/?g/ggen.go.
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// changing the uses in cmd/compile/internal/*/*.go.
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// runtime·duffcopy is a Duff's device for copying memory.
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// The compiler jumps to computed addresses within
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// the routine to copy chunks of memory.
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// Source and destination must not overlap.
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// Do not change duffcopy without also
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// changing blockcopy in cmd/?g/cgen.go.
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// changing the uses in cmd/compile/internal/*/*.go.
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// See the zero* and copy* generators below
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// for architecture-specific comments.
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