42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#include <altivec.h>
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// This follows ppc_simd.h. XLC compilers for POWER7 use vec_xlw4 and
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// vec_xstw4. Some XLC compilers for POWER7 and above use vec_xl and
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// vec_xst. The way to tell the difference is, XLC compilers version
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// 13.0 and earlier use use vec_xlw4 and vec_xstw4 XLC compilers 13.1
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// and later are use vec_xl and vec_xst. The open question is, how to
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// handle early Clang compilers for POWER7. We know the latest Clang
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// compilers support vec_xl and vec_xst. Also see
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// https://www-01.ibm.com/support/docview.wss?uid=swg21683541
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#if defined(__xlc__) && (__xlc__ < 0x0d01)
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# define __early_xlc__ 1
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#endif
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#if defined(__xlC__) && (__xlC__ < 0x0d01)
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# define __early_xlC__ 1
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#endif
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int main(int argc, char* argv[])
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{
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__vector unsigned char x;
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unsigned char res[16];
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#if defined(_ARCH_PWR7) && (defined(__early_xlc__) || defined(__early_xlC__))
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x=vec_xlw4(0, (unsigned char*)argv[0]);
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x=vec_add(x,x);
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vec_xstw4(x, 0, res);
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#elif defined(_ARCH_PWR7) && (defined(__xlc__) || defined(__xlC__) || defined(__clang__))
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x=vec_xl(0, (unsigned char*)argv[0]);
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x=vec_add(x,x);
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vec_xst(x, 0, res);
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#elif defined(_ARCH_PWR7) && defined(__GNUC__)
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x=vec_vsx_ld(0, (unsigned char*)argv[0]);
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x=vec_add(x,x);
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vec_vsx_st(x, 0, res);
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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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