Don't optimize by hand (Was Re: Lack of fabsf on Solaris(patch included))

[Kazuyuki Shudo]

Andrew Haley wrote:

> > And we probably don't really implement strict fp
> > semantics anyway
>
> The last time that I ran any tests we were 100% strict fp perfect.
> That's better than the other Java implementation I tried!
>
> Andrew.

Here is a test program.
If the Java runtime is compliant with the strictfp specification,
you will see the following:

  % java StrictfpTest
    shuJIT  for Sun Classic VM/x86  by Kazuyuki Shudo
  1.112808544714844E-308 (0x0008008000000000)
    * 1.0000000000000002 (0x3ff0000000000001)
  default : 1.112808544714844E-308 (0x8008000000000)
  strictfp: 1.1128085447148447E-308 (0x8008000000001)

  2.225073858507201E-308 (0x000fffffffffffff)
    / 0.9999999999999999 (0x3fefffffffffffff)
  default : 2.2250738585072014E-308 (0x10000000000000)
  strictfp: 2.225073858507201E-308 (0xfffffffffffff)

I guess the FP semantics has not been implemented on GCJ yet.

Kazuyuki SHUDO				Happy Hacking!
  Muraoka Laboratory, Waseda University