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From: Julian S. <js...@ac...> - 2012-09-03 14:27:43
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On Sunday, September 02, 2012, Florian Krohm wrote: > I would like to propose that we make the following changes related to > emulation warnings: > > (1) Issue emulation warnings by default. Currently, we don't do that > (2) Issue a particular warning only once. Currently, we issue it up > to three times. The reason it doesn't show them by default is that it generates a whole bunch of noise on x86(_64). I think that the FXSAVE/FXRSTOR family of instructions (saving and restoring the FPU and SSE state from memory) causes an emwarn each time FXRSTOR is done (not sure any more). And also, for people using the Intel compilers, the Intel runtime library messes with the FPU settings in a way which cause an emwarn at startup each time. Along the lines of "it is asking for a fast-but-inaccurate FP mode (RAZ/DAZ), but I can't do that, so I'm going to remain in the slower-but-accurate mode". J |