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Add support for POWER architecture #3

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Add support for POWER architecture #3

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16 changes: 14 additions & 2 deletions src/readTSC.C
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Original file line number Diff line number Diff line change
Expand Up @@ -16,13 +16,25 @@
//
///////////////////////////////////////////////////////////////////////////////

long long readTSC(void)
unsigned long long readTSC(void)
{
union { long long complete; unsigned int part[2]; } ticks;
union { unsigned long long complete; unsigned int part[2]; } ticks;
#ifdef __amd64__
__asm__ ("rdtsc; mov %%eax,%0;mov %%edx,%1"
: "=mr" (ticks.part[0]),
"=mr" (ticks.part[1])
: /* no inputs */
: "eax", "edx");
#elif __powerpc__
unsigned int tmp;
__asm__ ("0:"
"mftbu %[hi32]\n"
"mftb %[lo32]\n"
"mftbu %[tmp]\n"
"cmpw %[tmp],%[hi32]\n"
"bne 0b\n"
: [hi32] "=r"(ticks.part[0]), [lo32] "=r"(ticks.part[1]),
[tmp] "=r"(tmp));
#endif
return ticks.complete;
}