| 1 | /* Architecture-specific glibc-hwcaps subdirectories. s390x version. |
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| 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <dl-hwcaps.h> |
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| 20 | #include <ldsodefs.h> |
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| 21 | |
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| 22 | const char _dl_hwcaps_subdirs[] = "z16:z15:z14:z13" ; |
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| 23 | enum { subdirs_count = 4 }; /* Number of components in _dl_hwcaps_subdirs. */ |
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| 24 | |
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| 25 | uint32_t |
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| 26 | _dl_hwcaps_subdirs_active (void) |
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| 27 | { |
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| 28 | int active = 0; |
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| 29 | |
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| 30 | /* Test in reverse preference order. */ |
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| 31 | |
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| 32 | /* z13. */ |
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| 33 | if (!(GLRO (dl_hwcap) & HWCAP_S390_VX)) |
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| 34 | return _dl_hwcaps_subdirs_build_bitmask (subdirs: subdirs_count, active); |
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| 35 | ++active; |
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| 36 | |
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| 37 | /* z14. */ |
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| 38 | if (!((GLRO (dl_hwcap) & HWCAP_S390_VXD) |
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| 39 | && (GLRO (dl_hwcap) & HWCAP_S390_VXE) |
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| 40 | && (GLRO (dl_hwcap) & HWCAP_S390_GS))) |
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| 41 | return _dl_hwcaps_subdirs_build_bitmask (subdirs: subdirs_count, active); |
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| 42 | ++active; |
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| 43 | |
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| 44 | /* z15. |
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| 45 | Note: We do not list HWCAP_S390_SORT and HWCAP_S390_DFLT here as, |
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| 46 | according to the Principles of Operation, those may be replaced or removed |
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| 47 | in future. */ |
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| 48 | if (!((GLRO (dl_hwcap) & HWCAP_S390_VXRS_EXT2) |
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| 49 | && (GLRO (dl_hwcap) & HWCAP_S390_VXRS_PDE))) |
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| 50 | return _dl_hwcaps_subdirs_build_bitmask (subdirs: subdirs_count, active); |
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| 51 | ++active; |
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| 52 | |
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| 53 | /* z16. |
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| 54 | Note: We do not list HWCAP_S390_NNPA here as, according to the Principles of |
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| 55 | Operation, those instructions may be replaced or removed in future. */ |
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| 56 | if (!(GLRO (dl_hwcap) & HWCAP_S390_VXRS_PDE2)) |
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| 57 | return _dl_hwcaps_subdirs_build_bitmask (subdirs: subdirs_count, active); |
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| 58 | ++active; |
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| 59 | |
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| 60 | return _dl_hwcaps_subdirs_build_bitmask (subdirs: subdirs_count, active); |
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| 61 | } |
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| 62 | |
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