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This is necessary for math functions taking `long double` arguments to work reliably, as by default, new threads have their x87 precision set to 53 bits. Note the x87 control word can't be set in the TLS callback. It gets overwritten before the thread procedure begins execution. There is NO workaround for the win32 thread model, other than requiring users to call `_fpreset()` themselves. Reference: https://sourceforge.net/p/mingw-w64/mailman/message/37084134/ Signed-off-by: Liu Hao <lh_mouse@126.com> |
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