msaitoh cf9f94a483 sync with other archs.
Important fixes:

 > ldexp(denormal, exp>1023) would generate the wrong result in all non-overflow
 > cases.  Totally rework this code to fix this bug *and* make it faster.

 > Don't ever return -0.0.
2001-12-10 10:23:03 +00:00
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