Roland Scheidegger
c25ae5d27b
The emulation of these if there's no rounding instruction available is a bit more complicated than what the code did. In particular, doing fp-to-int/int-to-fp will not work if the exponent is large enough (and with NaNs, Infs). Hence such values need to be filtered out and the original value returned in this case (which fortunately should always be exact). This comes at the expense of performance (if your cpu doesn't support rounding instructions). Furthermore, floor/ifloor/ceil/iceil were affected by precision issues for values near negative (for floor) or positive (for ceil) zero, fix that as well (fixing this issue might not actually be slower except for ceil/iceil if the type is not signed which is probably rare - note iceil has no callers left in any case). Also add some new rounding test values in lp_test_arit to actually test for that stuff (which previously would have failed without sse41). This fixes https://bugs.freedesktop.org/show_bug.cgi?id=59701.
File: docs/README.WIN32 Last updated: 23 April 2011 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.