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Fix feature test programs for early POWER7 machines

pull/748/head
Jeffrey Walton 2018-11-19 18:29:46 -05:00
parent 0df98b049a
commit 0de4556b39
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1 changed files with 27 additions and 3 deletions
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30
TestPrograms/test_ppc_power7.cxx
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@ -1,14 +1,38 @@
#include <altivec.h>
// This follows ppc_simd.h. XLC compilers for POWER7 use vec_xlw4 and vec_xstw4.
// XLC compilers for POWER8 and above use vec_xl and vec_xst. The way to tell
// the difference is, POWER7 XLC compilers are version 12.x and earlier.
// The open question is, how to handle early Clang compilers for POWER7.
// We know the latest Clang compilers support vec_xl and vec_xst.
#if defined(__xlc__) && (__xlc__ < 0x0d00)
# define __old_xlc__ 1
#endif
#if defined(__xlC__) && (__xlC__ < 0x0d00)
# define __old_xlC__ 1
#endif
int main(int argc, char* argv[])
{
#if defined(__xlc__) || defined(__xlC__) || defined(__clang__)
__vector unsigned char x;
unsigned char res[16];
#if defined(__old_xlc__) || defined(__old_xlC__)
x=vec_xlw4(0, (unsigned char*)argv[0]);
x=vec_add(x,x);
vec_xstw4(x, 0, res);
#elif defined(__xlc__) || defined(__xlC__) || defined(__clang__)
x=vec_xl(0, (unsigned char*)argv[0]);
x=vec_add(x,x);
#else
__vector unsigned char x;
vec_xst(x, 0, res);
#elif defined(__GNUC__)
x=vec_vsx_ld(0, (unsigned char*)argv[0]);
x=vec_add(x,x);
vec_vsx_st(x, 0, res);
#else
int XXX[-1];
#endif
return 0;
}