The Wiert Corner – To save people from browsing Twitter history: @davidheff Yes. Alignment is critical. Even the stack must remain properly aligned. Its all part of the ABI. 27 Oct @davidheff SSE instructions and the xmm0:xmm15 registers. 27 Oct @danny_thorpe That and the fact that MS strongly discourages the use of the FP coproc on 64 bit Windows. 27 Oct @danny_thorpe Extendeds don’t align well, FP ops would dumb them down, sub-optimal codegen, are other reasons to drop them. 27 Oct http://goo.gl/D0Kv. “The x87 register stack is unused. … must be considered volatile across function ...
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