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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b24413180f
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>
137 lines
2.7 KiB
ArmAsm
137 lines
2.7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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.global __sdivsi3
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.global __sdivsi3_1
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.global __sdivsi3_2
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.section .text..SHmedia32,"ax"
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.align 2
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/* inputs: r4,r5 */
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/* clobbered: r1,r18,r19,r20,r21,r25,tr0 */
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/* result in r0 */
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__sdivsi3:
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__sdivsi3_1:
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ptb __div_table,tr0
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gettr tr0,r20
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__sdivsi3_2:
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nsb r5, r1
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shlld r5, r1, r25 /* normalize; [-2 ..1, 1..2) in s2.62 */
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shari r25, 58, r21 /* extract 5(6) bit index (s2.4 with hole -1..1) */
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/* bubble */
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ldx.ub r20, r21, r19 /* u0.8 */
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shari r25, 32, r25 /* normalize to s2.30 */
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shlli r21, 1, r21
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muls.l r25, r19, r19 /* s2.38 */
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ldx.w r20, r21, r21 /* s2.14 */
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ptabs r18, tr0
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shari r19, 24, r19 /* truncate to s2.14 */
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sub r21, r19, r19 /* some 11 bit inverse in s1.14 */
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muls.l r19, r19, r21 /* u0.28 */
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sub r63, r1, r1
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addi r1, 92, r1
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muls.l r25, r21, r18 /* s2.58 */
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shlli r19, 45, r19 /* multiply by two and convert to s2.58 */
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/* bubble */
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sub r19, r18, r18
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shari r18, 28, r18 /* some 22 bit inverse in s1.30 */
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muls.l r18, r25, r0 /* s2.60 */
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muls.l r18, r4, r25 /* s32.30 */
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/* bubble */
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shari r0, 16, r19 /* s-16.44 */
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muls.l r19, r18, r19 /* s-16.74 */
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shari r25, 63, r0
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shari r4, 14, r18 /* s19.-14 */
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shari r19, 30, r19 /* s-16.44 */
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muls.l r19, r18, r19 /* s15.30 */
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xor r21, r0, r21 /* You could also use the constant 1 << 27. */
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add r21, r25, r21
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sub r21, r19, r21
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shard r21, r1, r21
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sub r21, r0, r0
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blink tr0, r63
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/* This table has been generated by divtab.c .
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Defects for bias -330:
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Max defect: 6.081536e-07 at -1.000000e+00
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Min defect: 2.849516e-08 at 1.030651e+00
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Max 2nd step defect: 9.606539e-12 at -1.000000e+00
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Min 2nd step defect: 0.000000e+00 at 0.000000e+00
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Defect at 1: 1.238659e-07
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Defect at -2: 1.061708e-07 */
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.balign 2
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.type __div_table,@object
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.size __div_table,128
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/* negative division constants */
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.word -16638
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.word -17135
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.word -17737
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.word -18433
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.word -19103
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.word -19751
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.word -20583
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.word -21383
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.word -22343
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.word -23353
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.word -24407
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.word -25582
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.word -26863
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.word -28382
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.word -29965
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.word -31800
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/* negative division factors */
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.byte 66
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.byte 70
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.byte 75
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.byte 81
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.byte 87
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.byte 93
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.byte 101
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.byte 109
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.byte 119
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.byte 130
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.byte 142
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.byte 156
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.byte 172
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.byte 192
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.byte 214
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.byte 241
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.skip 16
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.global __div_table
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__div_table:
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.skip 16
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/* positive division factors */
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.byte 241
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.byte 214
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.byte 192
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.byte 172
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.byte 156
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.byte 142
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.byte 130
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.byte 119
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.byte 109
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.byte 101
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.byte 93
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.byte 87
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.byte 81
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.byte 75
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.byte 70
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.byte 66
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/* positive division constants */
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.word 31801
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.word 29966
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.word 28383
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.word 26864
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.word 25583
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.word 24408
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.word 23354
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.word 22344
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.word 21384
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.word 20584
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.word 19752
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.word 19104
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.word 18434
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.word 17738
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.word 17136
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.word 16639
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