runtime: generate dummy duffcopy
Although duffcopy is not used on PPC64, duff_ppc64x.s and
mkduff.go don't match. Make it so.
Fixes #38188.
Change-Id: Ic6c08e335795ea407880efd449f4229696af7744
Reviewed-on: https://go-review.googlesource.com/c/go/+/226719
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/runtime/duff_ppc64x.s b/src/runtime/duff_ppc64x.s
index 0c62d0a..d6b89ba 100644
--- a/src/runtime/duff_ppc64x.s
+++ b/src/runtime/duff_ppc64x.s
@@ -137,7 +137,5 @@
MOVDU R0, 8(R3)
RET
-// TODO: Implement runtime·duffcopy.
-TEXT runtime·duffcopy(SB),NOSPLIT|NOFRAME,$0-0
- MOVD R0, 0(R0)
- RET
+TEXT runtime·duffcopy(SB), NOSPLIT|NOFRAME, $0-0
+ UNDEF
diff --git a/src/runtime/mkduff.go b/src/runtime/mkduff.go
index 6ac5e7d..6c7a4cf 100644
--- a/src/runtime/mkduff.go
+++ b/src/runtime/mkduff.go
@@ -194,7 +194,9 @@
}
func copyPPC64x(w io.Writer) {
- fmt.Fprintln(w, "// TODO: Implement runtime·duffcopy.")
+ // duffcopy is not used on PPC64.
+ fmt.Fprintln(w, "TEXT runtime·duffcopy(SB), NOSPLIT|NOFRAME, $0-0")
+ fmt.Fprintln(w, "\tUNDEF")
}
func tagsMIPS64x(w io.Writer) {
