37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// The problem we have here is, it appears only GCC 7.0 and above
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// support Power9 builtins. Clang 7.0 has support for some (all?)
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// assembly instructions but we don't see builtin support. We can't
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// determine the state of XLC. Searching IBM's website for
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// terms like 'darn' 'random number' is returning irrelevant hits.
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// Searching with Google from the outside returns 0 hits.
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//
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// The support disconnect means we may report Power9 as unavailable
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// and support DARN at the same time. We get into that state because
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// we use inline asm to detect DARN availablity in the compiler.
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// Also see cpu.cpp and the two query functions; and ppc_power9.cpp
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// and the two probe functions.
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#include <altivec.h>
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int main(int argc, char* argv[])
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{
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#if 0
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const unsigned char b = (unsigned char)argc;
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const unsigned int r = (0xf << 24) | (0x3 << 16) | (0xf << 8) | (0x3 << 0);
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#if defined(__clang__)
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bool x = __builtin_altivec_byte_in_range(b, r);
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#elif defined(__GNUC__)
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bool x = __builtin_byte_in_range(b, r);
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#else
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int XXX[-1];
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#endif
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#endif
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#if defined(__GNUC__) || defined(__IBM_GCC_ASM)
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unsigned int y = __builtin_darn_32();
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#else
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int XXX[-1];
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#endif
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return 0;
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}
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