b937be3779
Summary:
Closes https://github.com/facebook/rocksdb/issues/7691
The optimised CRC code for PPC64le which was originally imported in https://github.com/facebook/rocksdb/pull/2353 is not compatible with Clang 11. It looks like the code most likely originated from https://github.com/antonblanchard/crc32-vpmsum.
The code relied on a GCC header file `ppc-asm.h` which is not available in Clang.
To solve this, I have taken the same approach as the the upstream project from which the CRC code came ffc8018efc (diff-ec3e62c56fbcddeb07230f2a4673c1abd7f0f1cc8e48a2aa560056cfc1b25d60) and simply imported a copy of the GCC header file into our code-base which will be used when Clang is the compiler on pcc64le.
**NOTE**: The new file `util/ppc-asm.h` may have licensing implications which I guess need to be approved by RocksDB/Facebook before this is merged
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7713
Reviewed By: jay-zhuang
Differential Revision: D25222645
Pulled By: pdillinger
fbshipit-source-id: e3fec9136f26ce1eb7a027048bcf77a6cb3c769c
391 lines
7.4 KiB
C
391 lines
7.4 KiB
C
/* PowerPC asm definitions for GNU C.
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Copyright (C) 2002-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* Under winnt, 1) gas supports the following as names and 2) in particular
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defining "toc" breaks the FUNC_START macro as ".toc" becomes ".2" */
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#define r0 0
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#define sp 1
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#define toc 2
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#define r3 3
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#define r4 4
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#define r5 5
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#define r6 6
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#define r7 7
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#define r8 8
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#define r9 9
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#define r10 10
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#define r11 11
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#define r12 12
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#define r13 13
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#define r14 14
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#define r15 15
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#define r16 16
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#define r17 17
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#define r18 18
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#define r19 19
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#define r20 20
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#define r21 21
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#define r22 22
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#define r23 23
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#define r24 24
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#define r25 25
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#define r26 26
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#define r27 27
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#define r28 28
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#define r29 29
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#define r30 30
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#define r31 31
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#define cr0 0
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#define cr1 1
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#define cr2 2
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#define cr3 3
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#define cr4 4
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#define cr5 5
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#define cr6 6
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#define cr7 7
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#define f0 0
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#define f1 1
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#define f2 2
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#define f3 3
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#define f4 4
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#define f5 5
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#define f6 6
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#define f7 7
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#define f8 8
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#define f9 9
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#define f10 10
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#define f11 11
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#define f12 12
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#define f13 13
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#define f14 14
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#define f15 15
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#define f16 16
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#define f17 17
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#define f18 18
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#define f19 19
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#define f20 20
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#define f21 21
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#define f22 22
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#define f23 23
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#define f24 24
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#define f25 25
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#define f26 26
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#define f27 27
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#define f28 28
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#define f29 29
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#define f30 30
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#define f31 31
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#ifdef __VSX__
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#define f32 32
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#define f33 33
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#define f34 34
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#define f35 35
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#define f36 36
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#define f37 37
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#define f38 38
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#define f39 39
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#define f40 40
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#define f41 41
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#define f42 42
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#define f43 43
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#define f44 44
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#define f45 45
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#define f46 46
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#define f47 47
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#define f48 48
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#define f49 49
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#define f50 50
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#define f51 51
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#define f52 52
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#define f53 53
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#define f54 54
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#define f55 55
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#define f56 56
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#define f57 57
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#define f58 58
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#define f59 59
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#define f60 60
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#define f61 61
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#define f62 62
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#define f63 63
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#endif
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#ifdef __ALTIVEC__
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#define v0 0
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#define v1 1
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#define v2 2
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#define v3 3
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#define v4 4
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#define v5 5
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#define v6 6
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#define v7 7
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#define v8 8
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#define v9 9
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#define v10 10
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#define v11 11
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#define v12 12
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#define v13 13
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#define v14 14
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#define v15 15
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#define v16 16
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#define v17 17
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#define v18 18
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#define v19 19
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#define v20 20
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#define v21 21
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#define v22 22
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#define v23 23
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#define v24 24
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#define v25 25
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#define v26 26
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#define v27 27
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#define v28 28
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#define v29 29
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#define v30 30
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#define v31 31
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#endif
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#ifdef __VSX__
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#define vs0 0
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#define vs1 1
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#define vs2 2
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#define vs3 3
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#define vs4 4
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#define vs5 5
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#define vs6 6
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#define vs7 7
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#define vs8 8
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#define vs9 9
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#define vs10 10
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#define vs11 11
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#define vs12 12
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#define vs13 13
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#define vs14 14
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#define vs15 15
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#define vs16 16
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#define vs17 17
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#define vs18 18
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#define vs19 19
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#define vs20 20
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#define vs21 21
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#define vs22 22
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#define vs23 23
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#define vs24 24
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#define vs25 25
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#define vs26 26
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#define vs27 27
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#define vs28 28
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#define vs29 29
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#define vs30 30
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#define vs31 31
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#define vs32 32
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#define vs33 33
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#define vs34 34
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#define vs35 35
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#define vs36 36
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#define vs37 37
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#define vs38 38
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#define vs39 39
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#define vs40 40
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#define vs41 41
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#define vs42 42
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#define vs43 43
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#define vs44 44
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#define vs45 45
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#define vs46 46
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#define vs47 47
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#define vs48 48
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#define vs49 49
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#define vs50 50
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#define vs51 51
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#define vs52 52
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#define vs53 53
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#define vs54 54
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#define vs55 55
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#define vs56 56
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#define vs57 57
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#define vs58 58
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#define vs59 59
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#define vs60 60
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#define vs61 61
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#define vs62 62
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#define vs63 63
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#endif
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/*
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* Macros to glue together two tokens.
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*/
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#ifdef __STDC__
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#define XGLUE(a,b) a##b
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#else
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#define XGLUE(a,b) a/**/b
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#endif
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#define GLUE(a,b) XGLUE(a,b)
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/*
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* Macros to begin and end a function written in assembler. If -mcall-aixdesc
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* or -mcall-nt, create a function descriptor with the given name, and create
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* the real function with one or two leading periods respectively.
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*/
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#if defined(__powerpc64__) && _CALL_ELF == 2
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/* Defining "toc" above breaks @toc in assembler code. */
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#undef toc
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#define FUNC_NAME(name) GLUE(__USER_LABEL_PREFIX__,name)
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#ifdef __PCREL__
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#define JUMP_TARGET(name) GLUE(FUNC_NAME(name),@notoc)
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#define FUNC_START(name) \
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.type FUNC_NAME(name),@function; \
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.globl FUNC_NAME(name); \
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FUNC_NAME(name): \
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.localentry FUNC_NAME(name),1
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#else
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#define JUMP_TARGET(name) FUNC_NAME(name)
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#define FUNC_START(name) \
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.type FUNC_NAME(name),@function; \
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.globl FUNC_NAME(name); \
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FUNC_NAME(name): \
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0: addis 2,12,(.TOC.-0b)@ha; \
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addi 2,2,(.TOC.-0b)@l; \
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.localentry FUNC_NAME(name),.-FUNC_NAME(name)
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#endif /* !__PCREL__ */
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#define HIDDEN_FUNC(name) \
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FUNC_START(name) \
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.hidden FUNC_NAME(name);
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#define FUNC_END(name) \
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.size FUNC_NAME(name),.-FUNC_NAME(name)
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#elif defined (__powerpc64__)
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#define FUNC_NAME(name) GLUE(.,name)
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#define JUMP_TARGET(name) FUNC_NAME(name)
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#define FUNC_START(name) \
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.section ".opd","aw"; \
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name: \
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.quad GLUE(.,name); \
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.quad .TOC.@tocbase; \
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.quad 0; \
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.previous; \
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.type GLUE(.,name),@function; \
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.globl name; \
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.globl GLUE(.,name); \
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GLUE(.,name):
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#define HIDDEN_FUNC(name) \
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FUNC_START(name) \
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.hidden name; \
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.hidden GLUE(.,name);
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#define FUNC_END(name) \
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GLUE(.L,name): \
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.size GLUE(.,name),GLUE(.L,name)-GLUE(.,name)
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#elif defined(_CALL_AIXDESC)
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#ifdef _RELOCATABLE
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#define DESC_SECTION ".got2"
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#else
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#define DESC_SECTION ".got1"
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#endif
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#define FUNC_NAME(name) GLUE(.,name)
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#define JUMP_TARGET(name) FUNC_NAME(name)
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#define FUNC_START(name) \
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.section DESC_SECTION,"aw"; \
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name: \
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.long GLUE(.,name); \
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.long _GLOBAL_OFFSET_TABLE_; \
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.long 0; \
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.previous; \
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.type GLUE(.,name),@function; \
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.globl name; \
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.globl GLUE(.,name); \
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GLUE(.,name):
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#define HIDDEN_FUNC(name) \
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FUNC_START(name) \
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.hidden name; \
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.hidden GLUE(.,name);
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#define FUNC_END(name) \
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GLUE(.L,name): \
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.size GLUE(.,name),GLUE(.L,name)-GLUE(.,name)
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#else
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#define FUNC_NAME(name) GLUE(__USER_LABEL_PREFIX__,name)
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#if defined __PIC__ || defined __pic__
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#define JUMP_TARGET(name) FUNC_NAME(name@plt)
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#else
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#define JUMP_TARGET(name) FUNC_NAME(name)
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#endif
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#define FUNC_START(name) \
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.type FUNC_NAME(name),@function; \
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.globl FUNC_NAME(name); \
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FUNC_NAME(name):
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#define HIDDEN_FUNC(name) \
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FUNC_START(name) \
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.hidden FUNC_NAME(name);
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#define FUNC_END(name) \
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GLUE(.L,name): \
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.size FUNC_NAME(name),GLUE(.L,name)-FUNC_NAME(name)
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#endif
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#ifdef IN_GCC
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/* For HAVE_GAS_CFI_DIRECTIVE. */
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#include "auto-host.h"
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#ifdef HAVE_GAS_CFI_DIRECTIVE
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# define CFI_STARTPROC .cfi_startproc
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# define CFI_ENDPROC .cfi_endproc
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# define CFI_OFFSET(reg, off) .cfi_offset reg, off
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# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg
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# define CFI_RESTORE(reg) .cfi_restore reg
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#else
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# define CFI_STARTPROC
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# define CFI_ENDPROC
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# define CFI_OFFSET(reg, off)
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# define CFI_DEF_CFA_REGISTER(reg)
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# define CFI_RESTORE(reg)
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#endif
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#endif
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#if defined __linux__ && !defined __powerpc64__
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.section .note.GNU-stack
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.previous
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#endif
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