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61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
/* IFUNC resolver function for CPU specific functions.
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32/64 bit S/390 version.
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Copyright (C) 2015-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <unistd.h>
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#include <dl-procinfo.h>
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#define S390_STFLE_BITS_Z10 34 /* General instructions extension */
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#define S390_STFLE_BITS_Z196 45 /* Distinct operands, pop ... */
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#define S390_STFLE_BITS_ARCH13_MIE3 61 /* Miscellaneous-Instruction-Extensions
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Facility 3, e.g. mvcrl. */
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#define S390_IS_ARCH13_MIE3(STFLE_BITS) \
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((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_ARCH13_MIE3))) != 0)
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#define S390_IS_Z196(STFLE_BITS) \
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((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z196))) != 0)
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#define S390_IS_Z10(STFLE_BITS) \
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((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z10))) != 0)
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#define S390_STORE_STFLE(STFLE_BITS) \
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/* We want just 1 double word to be returned. */ \
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register unsigned long reg0 __asm__("0") = 0; \
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\
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__asm__ __volatile__(".machine push" "\n\t" \
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".machine \"z9-109\"" "\n\t" \
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".machinemode \"zarch_nohighgprs\"\n\t" \
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"stfle %0" "\n\t" \
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".machine pop" "\n" \
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: "=QS" (STFLE_BITS), "+d" (reg0) \
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: : "cc");
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#define s390_libc_ifunc_expr_stfle_init() \
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unsigned long long stfle_bits = 0ULL; \
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if (__glibc_likely ((hwcap & HWCAP_S390_STFLE) \
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&& (hwcap & HWCAP_S390_ZARCH) \
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&& (hwcap & HWCAP_S390_HIGH_GPRS))) \
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{ \
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S390_STORE_STFLE (stfle_bits); \
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}
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#define s390_libc_ifunc_expr_init()
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#define s390_libc_ifunc_expr(TYPE_FUNC, FUNC, EXPR) \
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__ifunc (TYPE_FUNC, FUNC, EXPR, unsigned long int hwcap, \
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s390_libc_ifunc_expr_init);
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