75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#if defined(HAVE_CONFIG_H)
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#include "config/bitcoin-config.h"
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#endif
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#include <cstddef>
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#include <cstdint>
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#if defined(HAVE_SYS_SELECT_H)
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#include <sys/select.h>
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#endif
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// Prior to GLIBC_2.14, memcpy was aliased to memmove.
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extern "C" void* memmove(void* a, const void* b, size_t c);
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extern "C" void* memcpy(void* a, const void* b, size_t c)
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{
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return memmove(a, b, c);
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}
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extern "C" void __chk_fail(void) __attribute__((__noreturn__));
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extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a)
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{
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if (a >= FD_SETSIZE)
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__chk_fail();
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return a / __NFDBITS;
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}
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extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn")));
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#if defined(__i386__) || defined(__arm__)
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extern "C" int64_t __udivmoddi4(uint64_t u, uint64_t v, uint64_t* rp);
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extern "C" int64_t __wrap___divmoddi4(int64_t u, int64_t v, int64_t* rp)
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{
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int32_t c1 = 0, c2 = 0;
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int64_t uu = u, vv = v;
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int64_t w;
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int64_t r;
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if (uu < 0) {
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c1 = ~c1, c2 = ~c2, uu = -uu;
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}
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if (vv < 0) {
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c1 = ~c1, vv = -vv;
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}
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w = __udivmoddi4(uu, vv, (uint64_t*)&r);
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if (c1)
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w = -w;
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if (c2)
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r = -r;
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*rp = r;
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return w;
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}
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#endif
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extern "C" float log2f_old(float x);
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#ifdef __i386__
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__asm(".symver log2f_old,log2f@GLIBC_2.1");
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#elif defined(__amd64__)
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__asm(".symver log2f_old,log2f@GLIBC_2.2.5");
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#elif defined(__arm__)
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__asm(".symver log2f_old,log2f@GLIBC_2.4");
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#elif defined(__aarch64__)
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__asm(".symver log2f_old,log2f@GLIBC_2.17");
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#endif
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extern "C" float __wrap_log2f(float x)
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{
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return log2f_old(x);
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}
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