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* pointer-set.c (hash1): Don't use libm functions in fallback case.

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From-SVN: r89231
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Richard Henderson 2004-10-18 09:44:50 -07:00 committed by Richard Henderson
parent f072a5c8aa
commit b499264121
2 changed files with 7 additions and 4 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2004-10-18 Richard Henderson <rth@redhat.com>
* pointer-set.c (hash1): Don't use libm functions in fallback case.
2004-10-18 H.J. Lu <hongjiu.lu@intel.com>
PR bootstrap/17684

7
gcc/pointer-set.c
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@ -61,11 +61,10 @@ hash1 (const void *p, unsigned long max, unsigned long logmax)
#elif HOST_BITS_PER_LONG == 64
const unsigned long A = 0x9e3779b97f4a7c16ul;
#else
const double M = (ULONG_MAX + 1.0);
const double B = M / ((sqrt (5) - 1) / 2.0);
const unsigned long A = B - (floor (B / M) * M);
const unsigned long A
= (ULONG_MAX + 1.0L) * 0.6180339887498948482045868343656381177203L;
#endif
const unsigned long shift = sizeof (unsigned long) * CHAR_BIT - logmax;
const unsigned long shift = HOST_BITS_PER_LONG - logmax;
return ((A * (unsigned long) p) >> shift) & (max - 1);
}