on gencgc
* optimization: faster bignum subtraction and division on x86 and x86-64
(thanks to Lutz Euler)
+ * optimization: more accurate type-inference for loops that use a
+ floating point index variable or a negative step.
changes in sbcl-0.9.6 relative to sbcl-0.9.5:
* bug fix: add a workaround to SBCL looping infinitely at startup on