[Mono-dev] Patch: Stack alignment on x86

[Mark Probst]

Hi,

This patch aligns the stack in managed code on x86 to 16 bytes on all
platforms, not only on Darwin, as done (incompletely) previously.  In
addition the alignment can now be specified by a #define.

The reason for this patch is that floating point code that uses doubles
performs poorly if the stack (and thus the local variables) is not
aligned to at least 8 bytes.

Paolo: Please review.

Mark

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