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go/src/runtime/atomic_ppc64x.s

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[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
all: power64 is now ppc64 Fixes #8654. LGTM=austin R=austin CC=golang-codereviews https://golang.org/cl/180600043
2014-12-05 17:13:20 -07:00
// +build ppc64 ppc64le
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
#include "textflag.h"
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
// uint32 runtime·atomicload(uint32 volatile* addr)
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
TEXT ·atomicload(SB),NOSPLIT,$-8-12
[dev.cc] runtime: fix FP reference in atomic_ppc64x.s References to FP must now have a symbol. Change-Id: I3f06b99cc48cbd4ccd6f23f2e4b0830af40f7f3d Reviewed-on: https://go-review.googlesource.com/5281 Reviewed-by: Russ Cox <rsc@golang.org>
2015-02-18 21:02:16 -07:00
MOVD addr+0(FP), R3
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
SYNC
MOVWZ 0(R3), R3
CMPW R3, R3, CR7
BC 4, 30, 1(PC) // bne- cr7,0x4
ISYNC
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
MOVW R3, ret+8(FP)
all: use RET instead of RETURN on ppc64 All of the architectures except ppc64 have only "RET" for the return mnemonic. ppc64 used to have only "RETURN", but commit cf06ea6 introduced RET as a synonym for RETURN to make ppc64 consistent with the other architectures. However, that commit was never followed up to make the code itself consistent by eliminating uses of RETURN. This commit replaces all uses of RETURN in the ppc64 assembly with RET. This was done with sed -i 's/\<RETURN\>/RET/' **/*_ppc64x.s plus one manual change to syscall/asm.s. Change-Id: I3f6c8d2be157df8841d48de988ee43f3e3087995 Reviewed-on: https://go-review.googlesource.com/10672 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2015-06-03 12:59:27 -06:00
RET
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
// uint64 runtime·atomicload64(uint64 volatile* addr)
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
TEXT ·atomicload64(SB),NOSPLIT,$-8-16
[dev.cc] runtime: fix FP reference in atomic_ppc64x.s References to FP must now have a symbol. Change-Id: I3f06b99cc48cbd4ccd6f23f2e4b0830af40f7f3d Reviewed-on: https://go-review.googlesource.com/5281 Reviewed-by: Russ Cox <rsc@golang.org>
2015-02-18 21:02:16 -07:00
MOVD addr+0(FP), R3
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
SYNC
MOVD 0(R3), R3
CMP R3, R3, CR7
BC 4, 30, 1(PC) // bne- cr7,0x4
ISYNC
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
MOVD R3, ret+8(FP)
all: use RET instead of RETURN on ppc64 All of the architectures except ppc64 have only "RET" for the return mnemonic. ppc64 used to have only "RETURN", but commit cf06ea6 introduced RET as a synonym for RETURN to make ppc64 consistent with the other architectures. However, that commit was never followed up to make the code itself consistent by eliminating uses of RETURN. This commit replaces all uses of RETURN in the ppc64 assembly with RET. This was done with sed -i 's/\<RETURN\>/RET/' **/*_ppc64x.s plus one manual change to syscall/asm.s. Change-Id: I3f6c8d2be157df8841d48de988ee43f3e3087995 Reviewed-on: https://go-review.googlesource.com/10672 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2015-06-03 12:59:27 -06:00
RET
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
// void *runtime·atomicloadp(void *volatile *addr)
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
TEXT ·atomicloadp(SB),NOSPLIT,$-8-16
[dev.cc] runtime: fix FP reference in atomic_ppc64x.s References to FP must now have a symbol. Change-Id: I3f06b99cc48cbd4ccd6f23f2e4b0830af40f7f3d Reviewed-on: https://go-review.googlesource.com/5281 Reviewed-by: Russ Cox <rsc@golang.org>
2015-02-18 21:02:16 -07:00
MOVD addr+0(FP), R3
[dev.power64] runtime: manually written parts for linux/power64 and linux/power64le, checkpoint LGTM=rsc R=rsc, iant CC=golang-codereviews https://golang.org/cl/122430043
2014-08-12 17:48:49 -06:00
SYNC
MOVD 0(R3), R3
CMP R3, R3, CR7
BC 4, 30, 1(PC) // bne- cr7,0x4
ISYNC
[dev.power64] runtime: power64 fixes and ports of changes Fix include paths that got moved in the great pkg/ rename. Add missing runtime/arch_* files for power64. Port changes that happened on default since branching to runtime/{asm,atomic,sys_linux}_power64x.s (precise stacks, calling convention change, various new and deleted functions. Port struct renaming and fix some bugs in runtime/defs_linux_power64.h. LGTM=rsc R=rsc, dave CC=golang-codereviews https://golang.org/cl/161450043
2014-10-27 15:27:03 -06:00
MOVD R3, ret+8(FP)
all: use RET instead of RETURN on ppc64 All of the architectures except ppc64 have only "RET" for the return mnemonic. ppc64 used to have only "RETURN", but commit cf06ea6 introduced RET as a synonym for RETURN to make ppc64 consistent with the other architectures. However, that commit was never followed up to make the code itself consistent by eliminating uses of RETURN. This commit replaces all uses of RETURN in the ppc64 assembly with RET. This was done with sed -i 's/\<RETURN\>/RET/' **/*_ppc64x.s plus one manual change to syscall/asm.s. Change-Id: I3f6c8d2be157df8841d48de988ee43f3e3087995 Reviewed-on: https://go-review.googlesource.com/10672 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2015-06-03 12:59:27 -06:00
RET
runtime: ensure GC sees type-safe memory on weak machines Currently its possible for the garbage collector to observe uninitialized memory or stale heap bitmap bits on weakly ordered architectures such as ARM and PPC. On such architectures, the stores that zero newly allocated memory and initialize its heap bitmap may move after a store in user code that makes the allocated object observable by the garbage collector. To fix this, add a "publication barrier" (also known as an "export barrier") before returning from mallocgc. This is a store/store barrier that ensures any write done by user code that makes the returned object observable to the garbage collector will be ordered after the initialization performed by mallocgc. No barrier is necessary on the reading side because of the data dependency between loading the pointer and loading the contents of the object. Fixes one of the issues raised in #9984. Change-Id: Ia3d96ad9c5fc7f4d342f5e05ec0ceae700cd17c8 Reviewed-on: https://go-review.googlesource.com/11083 Reviewed-by: Rick Hudson <rlh@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Minux Ma <minux@golang.org> Reviewed-by: Martin Capitanio <capnm9@gmail.com> Reviewed-by: Russ Cox <rsc@golang.org>
2015-06-15 10:30:23 -06:00
TEXT ·publicationBarrier(SB),NOSPLIT,$-8-0
// LWSYNC is the "export" barrier recommended by Power ISA
// v2.07 book II, appendix B.2.2.2.
// LWSYNC is a load/load, load/store, and store/store barrier.
WORD $0x7c2004ac // LWSYNC
RET
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