Enable micro-optimization of fast-unary-ftruncate and
double-float-bits for x86/sse2. This gives x86 the same micro-optimizations that were available for sparc and ppc. o code/kernel.lisp: o Enable fast double-float-bits using the vop instead of calling double-float-high-bits/double-float-low-bits. o compiler/float-tran.lisp: o Make fast-unary-ftruncate known to compiler and enable optimizer for it. o Make double-float-bits known to compiler o compiler/x86/float-sse2.lisp: o Implement fast-unary-ftruncate for singles and doubles. o Implement double-float-bits.