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alistair23-linux/arch/metag/lib/memmove.S
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

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! SPDX-License-Identifier: GPL-2.0
! Copyright (C) 2008-2012 Imagination Technologies Ltd.
.text
.global _memmove
.type _memmove,function
! D1Ar1 dst
! D0Ar2 src
! D1Ar3 cnt
! D0Re0 dst
_memmove:
CMP D1Ar3, #0
MOV D0Re0, D1Ar1
BZ $LEND2
MSETL [A0StP], D0.5, D0.6, D0.7
MOV D1Ar5, D0Ar2
CMP D1Ar1, D1Ar5
BLT $Lforwards_copy
SUB D0Ar4, D1Ar1, D1Ar3
ADD D0Ar4, D0Ar4, #1
CMP D0Ar2, D0Ar4
BLT $Lforwards_copy
! should copy backwards
MOV D1Re0, D0Ar2
! adjust pointer to the end of mem
ADD D0Ar2, D1Re0, D1Ar3
ADD D1Ar1, D1Ar1, D1Ar3
MOV A1.2, D0Ar2
MOV A0.2, D1Ar1
CMP D1Ar3, #8
BLT $Lbbyte_loop
MOV D0Ar4, D0Ar2
MOV D1Ar5, D1Ar1
! test 8 byte alignment
ANDS D1Ar5, D1Ar5, #7
BNE $Lbdest_unaligned
ANDS D0Ar4, D0Ar4, #7
BNE $Lbsrc_unaligned
LSR D1Ar5, D1Ar3, #3
$Lbaligned_loop:
GETL D0Re0, D1Re0, [--A1.2]
SETL [--A0.2], D0Re0, D1Re0
SUBS D1Ar5, D1Ar5, #1
BNE $Lbaligned_loop
ANDS D1Ar3, D1Ar3, #7
BZ $Lbbyte_loop_exit
$Lbbyte_loop:
GETB D1Re0, [--A1.2]
SETB [--A0.2], D1Re0
SUBS D1Ar3, D1Ar3, #1
BNE $Lbbyte_loop
$Lbbyte_loop_exit:
MOV D0Re0, A0.2
$LEND:
SUB A0.2, A0StP, #24
MGETL D0.5, D0.6, D0.7, [A0.2]
SUB A0StP, A0StP, #24
$LEND2:
MOV PC, D1RtP
$Lbdest_unaligned:
GETB D0Re0, [--A1.2]
SETB [--A0.2], D0Re0
SUBS D1Ar5, D1Ar5, #1
SUB D1Ar3, D1Ar3, #1
BNE $Lbdest_unaligned
CMP D1Ar3, #8
BLT $Lbbyte_loop
$Lbsrc_unaligned:
LSR D1Ar5, D1Ar3, #3
! adjust A1.2
MOV D0Ar4, A1.2
! save original address
MOV D0Ar6, A1.2
ADD D0Ar4, D0Ar4, #7
ANDMB D0Ar4, D0Ar4, #0xfff8
! new address is the 8-byte aligned one above the original
MOV A1.2, D0Ar4
! A0.2 dst 64-bit is aligned
! measure the gap size
SUB D0Ar6, D0Ar4, D0Ar6
MOVS D0Ar4, D0Ar6
! keep this information for the later adjustment
! both aligned
BZ $Lbaligned_loop
! prefetch
GETL D0Re0, D1Re0, [--A1.2]
CMP D0Ar6, #4
BLT $Lbunaligned_1_2_3
! 32-bit aligned
BZ $Lbaligned_4
SUB D0Ar6, D0Ar6, #4
! D1.6 stores the gap size in bits
MULW D1.6, D0Ar6, #8
MOV D0.6, #32
! D0.6 stores the complement of the gap size
SUB D0.6, D0.6, D1.6
$Lbunaligned_5_6_7:
GETL D0.7, D1.7, [--A1.2]
! form 64-bit data in D0Re0, D1Re0
MOV D1Re0, D0Re0
! D1Re0 << gap-size
LSL D1Re0, D1Re0, D1.6
MOV D0Re0, D1.7
! D0Re0 >> complement
LSR D0Re0, D0Re0, D0.6
MOV D1.5, D0Re0
! combine the both
ADD D1Re0, D1Re0, D1.5
MOV D1.5, D1.7
LSL D1.5, D1.5, D1.6
MOV D0Re0, D0.7
LSR D0Re0, D0Re0, D0.6
MOV D0.5, D1.5
ADD D0Re0, D0Re0, D0.5
SETL [--A0.2], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lbunaligned_5_6_7
ANDS D1Ar3, D1Ar3, #7
BZ $Lbbyte_loop_exit
! Adjust A1.2
! A1.2 <- A1.2 +8 - gapsize
ADD A1.2, A1.2, #8
SUB A1.2, A1.2, D0Ar4
B $Lbbyte_loop
$Lbunaligned_1_2_3:
MULW D1.6, D0Ar6, #8
MOV D0.6, #32
SUB D0.6, D0.6, D1.6
$Lbunaligned_1_2_3_loop:
GETL D0.7, D1.7, [--A1.2]
! form 64-bit data in D0Re0, D1Re0
LSL D1Re0, D1Re0, D1.6
! save D0Re0 for later use
MOV D0.5, D0Re0
LSR D0Re0, D0Re0, D0.6
MOV D1.5, D0Re0
ADD D1Re0, D1Re0, D1.5
! orignal data in D0Re0
MOV D1.5, D0.5
LSL D1.5, D1.5, D1.6
MOV D0Re0, D1.7
LSR D0Re0, D0Re0, D0.6
MOV D0.5, D1.5
ADD D0Re0, D0Re0, D0.5
SETL [--A0.2], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lbunaligned_1_2_3_loop
ANDS D1Ar3, D1Ar3, #7
BZ $Lbbyte_loop_exit
! Adjust A1.2
ADD A1.2, A1.2, #8
SUB A1.2, A1.2, D0Ar4
B $Lbbyte_loop
$Lbaligned_4:
GETL D0.7, D1.7, [--A1.2]
MOV D1Re0, D0Re0
MOV D0Re0, D1.7
SETL [--A0.2], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lbaligned_4
ANDS D1Ar3, D1Ar3, #7
BZ $Lbbyte_loop_exit
! Adjust A1.2
ADD A1.2, A1.2, #8
SUB A1.2, A1.2, D0Ar4
B $Lbbyte_loop
$Lforwards_copy:
MOV A1.2, D0Ar2
MOV A0.2, D1Ar1
CMP D1Ar3, #8
BLT $Lfbyte_loop
MOV D0Ar4, D0Ar2
MOV D1Ar5, D1Ar1
ANDS D1Ar5, D1Ar5, #7
BNE $Lfdest_unaligned
ANDS D0Ar4, D0Ar4, #7
BNE $Lfsrc_unaligned
LSR D1Ar5, D1Ar3, #3
$Lfaligned_loop:
GETL D0Re0, D1Re0, [A1.2++]
SUBS D1Ar5, D1Ar5, #1
SETL [A0.2++], D0Re0, D1Re0
BNE $Lfaligned_loop
ANDS D1Ar3, D1Ar3, #7
BZ $Lfbyte_loop_exit
$Lfbyte_loop:
GETB D1Re0, [A1.2++]
SETB [A0.2++], D1Re0
SUBS D1Ar3, D1Ar3, #1
BNE $Lfbyte_loop
$Lfbyte_loop_exit:
MOV D0Re0, D1Ar1
B $LEND
$Lfdest_unaligned:
GETB D0Re0, [A1.2++]
ADD D1Ar5, D1Ar5, #1
SUB D1Ar3, D1Ar3, #1
SETB [A0.2++], D0Re0
CMP D1Ar5, #8
BNE $Lfdest_unaligned
CMP D1Ar3, #8
BLT $Lfbyte_loop
$Lfsrc_unaligned:
! adjust A1.2
LSR D1Ar5, D1Ar3, #3
MOV D0Ar4, A1.2
MOV D0Ar6, A1.2
ANDMB D0Ar4, D0Ar4, #0xfff8
MOV A1.2, D0Ar4
! A0.2 dst 64-bit is aligned
SUB D0Ar6, D0Ar6, D0Ar4
! keep the information for the later adjustment
MOVS D0Ar4, D0Ar6
! both aligned
BZ $Lfaligned_loop
! prefetch
GETL D0Re0, D1Re0, [A1.2]
CMP D0Ar6, #4
BLT $Lfunaligned_1_2_3
BZ $Lfaligned_4
SUB D0Ar6, D0Ar6, #4
MULW D0.6, D0Ar6, #8
MOV D1.6, #32
SUB D1.6, D1.6, D0.6
$Lfunaligned_5_6_7:
GETL D0.7, D1.7, [++A1.2]
! form 64-bit data in D0Re0, D1Re0
MOV D0Re0, D1Re0
LSR D0Re0, D0Re0, D0.6
MOV D1Re0, D0.7
LSL D1Re0, D1Re0, D1.6
MOV D0.5, D1Re0
ADD D0Re0, D0Re0, D0.5
MOV D0.5, D0.7
LSR D0.5, D0.5, D0.6
MOV D1Re0, D1.7
LSL D1Re0, D1Re0, D1.6
MOV D1.5, D0.5
ADD D1Re0, D1Re0, D1.5
SETL [A0.2++], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lfunaligned_5_6_7
ANDS D1Ar3, D1Ar3, #7
BZ $Lfbyte_loop_exit
! Adjust A1.2
ADD A1.2, A1.2, D0Ar4
B $Lfbyte_loop
$Lfunaligned_1_2_3:
MULW D0.6, D0Ar6, #8
MOV D1.6, #32
SUB D1.6, D1.6, D0.6
$Lfunaligned_1_2_3_loop:
GETL D0.7, D1.7, [++A1.2]
! form 64-bit data in D0Re0, D1Re0
LSR D0Re0, D0Re0, D0.6
MOV D1.5, D1Re0
LSL D1Re0, D1Re0, D1.6
MOV D0.5, D1Re0
ADD D0Re0, D0Re0, D0.5
MOV D0.5, D1.5
LSR D0.5, D0.5, D0.6
MOV D1Re0, D0.7
LSL D1Re0, D1Re0, D1.6
MOV D1.5, D0.5
ADD D1Re0, D1Re0, D1.5
SETL [A0.2++], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lfunaligned_1_2_3_loop
ANDS D1Ar3, D1Ar3, #7
BZ $Lfbyte_loop_exit
! Adjust A1.2
ADD A1.2, A1.2, D0Ar4
B $Lfbyte_loop
$Lfaligned_4:
GETL D0.7, D1.7, [++A1.2]
MOV D0Re0, D1Re0
MOV D1Re0, D0.7
SETL [A0.2++], D0Re0, D1Re0
MOV D0Re0, D0.7
MOV D1Re0, D1.7
SUBS D1Ar5, D1Ar5, #1
BNE $Lfaligned_4
ANDS D1Ar3, D1Ar3, #7
BZ $Lfbyte_loop_exit
! Adjust A1.2
ADD A1.2, A1.2, D0Ar4
B $Lfbyte_loop
.size _memmove,.-_memmove
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