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21 lines
530 B
21 lines
530 B
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void add128( uint64_t & rlo, uint64_t & rhi, uint64_t addlo ) {
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#if defined(HAVE_X86_64_ASM)
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__asm__ ("addq %2, %0\n"
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"adcq $0, %1\n"
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#if defined(__clang__)
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// clang cannot work properly with "g" and silently
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// produces hardly-workging code, if "g" is specified;
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: "+r" (rlo), "+r" (rhi)
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: "m" (addlo)
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#else
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: "+g" (rlo), "+g" (rhi)
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: "g" (addlo)
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#endif
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);
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#else
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rlo += addlo;
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rhi += (rlo < addlo);
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#endif
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}
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