0.8.19.31:

0.8.19.31:
	x86-64 floating point improvements:
        * Optimization: fewer moves on floating point add/sub/mul/div.
          Only use a temporary xmm register if absolutely needed.
	* Optimization: When restoring xmm15 to zero after a c-call,
          use xorpd instead of a temporary register and movq.
        * Replace broken x87 FLOATING-POINT-MODES and SET-FLOATING-POINT-MODES
          with SSE code that uses the mxcsr control register.
        * Fix movd / movq from a xmm register to a gp register.
        * Add new instructions: ldmxcsr, stmxcsr