qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-19 16:34:49 -07:00
Code Releases Activity
e7e4a4ffa3
go/src/runtime/memclr_arm.s

88 lines
2.4 KiB
ArmAsm
Raw Normal View History

Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
// Inferno's libkern/memset-arm.s
all: fix obsolete inferno-os links Fixes #16911. Fix obsolete inferno-os links, since code.google.com shutdown. This CL points to the right files by replacing http://code.google.com/p/inferno-os/source/browse with https://bitbucket.org/inferno-os/inferno-os/src/default To implement the change I wrote and ran this script in the root: $ grep -Rn 'http://code.google.com/p/inferno-os/source/browse' * \ | cut -d":" -f1 | while read F;do perl -pi -e \ 's/http:\/\/code.google.com\/p\/inferno-os\/source\/browse/https:\/\/bitbucket.org\/inferno-os\/inferno-os\/src\/default/g' $F;done I excluded any cmd/vendor changes from the commit. Change-Id: Iaaf828ac8f6fc949019fd01832989d00b29b6749 Reviewed-on: https://go-review.googlesource.com/27994 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-08-28 18:04:46 -06:00
// https://bitbucket.org/inferno-os/inferno-os/src/default/libkern/memset-arm.s
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
//
all: single space after period. The tree's pretty inconsistent about single space vs double space after a period in documentation. Make it consistently a single space, per earlier decisions. This means contributors won't be confused by misleading precedence. This CL doesn't use go/doc to parse. It only addresses // comments. It was generated with: $ perl -i -npe 's,^(\s*// .+[a-z]\.) +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.) +([A-Z])') $ go test go/doc -update Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7 Reviewed-on: https://go-review.googlesource.com/20022 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Dave Day <djd@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-01 16:21:55 -07:00
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
// Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
// Portions Copyright 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
runtime: use new #include "textflag.h" I did this just to clean things up, but it will be important when we drop the pkg directory later. LGTM=bradfitz R=r, bradfitz CC=golang-codereviews https://golang.org/cl/132600043
2014-09-04 21:05:18 -06:00
#include "textflag.h"
runtime: convert .s textflags from numbers to symbolic constants. Remove NOPROF/DUPOK from everything. Edits done with a script, except pclinetest.asm which depended on the DUPOK flag on main(). R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/12613044
2013-08-07 13:20:05 -06:00
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
#define TO R8
#define TOE R11
#define N R12
#define TMP R12 /* N and TMP don't overlap */
runtime: avoid r9/r10 during memset Partially fixes issue 3718. R=golang-dev, rsc, minux.ma CC=golang-dev https://golang.org/cl/6300043
2012-06-24 15:59:50 -06:00
runtime, cmd/compile: rename memclr -> memclrNoHeapPointers Since barrier-less memclr is only safe in very narrow circumstances, this commit renames memclr to avoid accidentally calling memclr on typed memory. This can cause subtle, non-deterministic bugs, so it's worth some effort to prevent. In the near term, this will also prevent bugs creeping in from any concurrent CLs that add calls to memclr; if this happens, whichever patch hits master second will fail to compile. This also adds the other new memclr variants to the compiler's builtin.go to minimize the churn on that binary blob. We'll use these in future commits. Updates #17503. Change-Id: I00eead049f5bd35ca107ea525966831f3d1ed9ca Reviewed-on: https://go-review.googlesource.com/31369 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Rick Hudson <rlh@golang.org>
2016-10-17 16:41:56 -06:00
TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-8
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
MOVW ptr+0(FP), TO
MOVW n+4(FP), N
MOVW $0, R0
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
ADD N, TO, TOE /* to end pointer */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
CMP $4, N /* need at least 4 bytes to copy */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BLT _1tail
_4align: /* align on 4 */
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
AND.S $3, TO, TMP
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BEQ _4aligned
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
MOVBU.P R0, 1(TO) /* implicit write back */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
B _4align
_4aligned:
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
SUB $31, TOE, TMP /* do 32-byte chunks if possible */
CMP TMP, TO
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BHS _4tail
runtime: avoid r9/r10 during memset Partially fixes issue 3718. R=golang-dev, rsc, minux.ma CC=golang-dev https://golang.org/cl/6300043
2012-06-24 15:59:50 -06:00
MOVW R0, R1 /* replicate */
MOVW R0, R2
MOVW R0, R3
MOVW R0, R4
MOVW R0, R5
MOVW R0, R6
MOVW R0, R7
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
_f32loop:
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
CMP TMP, TO
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BHS _4tail
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
MOVM.IA.W [R0-R7], (TO)
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
B _f32loop
_4tail:
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
SUB $3, TOE, TMP /* do remaining words if possible */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
_4loop:
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
CMP TMP, TO
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BHS _1tail
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
MOVW.P R0, 4(TO) /* implicit write back */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
B _4loop
_1tail:
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
CMP TO, TOE
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
BEQ _return
[dev.cc] all: edit assembly source for ARM to be more regular Several .s files for ARM had several properties the new assembler will not support. These include: - mentioning SP or PC as a hardware register These are always pseudo-registers except that in some contexts they're not, and it's confusing because the context should not affect which register you mean. Change the references to the hardware registers to be explicit: R13 for SP, R15 for PC. - constant creation using assignment The files say a=b when they could instead say #define a b. There is no reason to have both mechanisms. - R(0) to refer to R0. Some macros use this to a great extent. Again, it's easy just to use a #define to rename a register. Change-Id: I002335ace8e876c5b63c71c2560533eb835346d2 Reviewed-on: https://go-review.googlesource.com/4822 Reviewed-by: Dave Cheney <dave@cheney.net>
2015-02-13 15:21:18 -07:00
MOVBU.P R0, 1(TO) /* implicit write back */
Runtime is now starting up with a dummy c program as target: - morestack and gosave/gogo/gocall support - memclr and memset from inferno - bugfixes in _rt0_arm R=rsc APPROVED=rsc DELTA=304 (174 added, 36 deleted, 94 changed) OCL=30636 CL=30642
2009-06-23 12:54:23 -06:00
B _1tail
_return:
RET
Copy Permalink