Do not mess with FPU rounding control on Linux.
It significantly affects at least the software lighting calculations. This was SVN commit r3103.
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@ -165,10 +165,16 @@ void cpu_init()
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// note: passing a flag *disables* that exception.
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_control87(_EM_INVALID|_EM_DENORMAL|_EM_OVERFLOW|_EM_UNDERFLOW|_EM_INEXACT, _MCW_EM);
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#if OS_WIN
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// On Windows:
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// round toward zero (truncate). this is what ANSI C calls for;
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// if we set it to this (default is round to nearest), the compiler can
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// generate FISTP (much faster) instead of _ftol2 with the same results.
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//
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// Don't do this anywhere else unless the implications have been fully
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// investigated.
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_control87(_RC_CHOP, _MCW_RC);
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#endif
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// If possible, hook up capability-sensitive assembler routines
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ia32_hook_capabilities();
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