cmd/internal/obj/s390x: fix SYNC instruction encoding
SYNC is supposed to correspond to 'fast-BCR-serialization' which is
encoded as 'bcr 14,0'. In CL 197178 I accidentally modified the
encoding to 'bcr 7,0' which is a no-op. This CL reverses that change.
Fixes #42479.
Change-Id: I9918d93d720f5e12acc3014cde20d2d32cc87ee5
Reviewed-on: https://go-review.googlesource.com/c/go/+/268797
Run-TryBot: Michael Munday <mike.munday@ibm.com>
Trust: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
diff --git a/src/cmd/asm/internal/asm/testdata/s390x.s b/src/cmd/asm/internal/asm/testdata/s390x.s
index 03b84cf..7c5d26b 100644
--- a/src/cmd/asm/internal/asm/testdata/s390x.s
+++ b/src/cmd/asm/internal/asm/testdata/s390x.s
@@ -412,6 +412,8 @@
UNDEF // 00000000
NOPH // 0700
+ SYNC // 07e0
+
// vector add and sub instructions
VAB V3, V4, V4 // e743400000f3
VAH V3, V4, V4 // e743400010f3
diff --git a/src/cmd/internal/obj/s390x/asmz.go b/src/cmd/internal/obj/s390x/asmz.go
index f0f9d5c..0692108 100644
--- a/src/cmd/internal/obj/s390x/asmz.go
+++ b/src/cmd/internal/obj/s390x/asmz.go
@@ -3700,7 +3700,7 @@
}
case 80: // sync
- zRR(op_BCR, uint32(NotEqual), 0, asm)
+ zRR(op_BCR, 14, 0, asm) // fast-BCR-serialization
case 81: // float to fixed and fixed to float moves (no conversion)
switch p.As {
