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e2192a8fd5
Details: - Fixed a bug in the zen (also used by haswell) dotxf kernels whereby a vzeroupper instruction destoryed part of the intermediate result stored by the vdpps instructions that came right before. (The vzeroupper instrinsic was removed.) - Removed remaining vzeroupper instrinsics from other zen kernels. Previously, the vzeroupper instructions were included because BLIS is typically compiled with -mfpmath=sse. But it was brought to my attention that inserting these vzeroupper instructions is unnecessary for our purposes, since (a) -mfpmath=sse results in VEX-encoded scalar code rather than literal SSE instructions, and (b) compilers already (likely) insert vzeroupper instructions where necessary. Thanks to Devin Matthews for zeroing in on the dotxf bug. - Removed -malign-double from bulldozer make_defs.mk. This alignment was already happening by default since bulldozer is an x86_64 system.