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Re: FLOATING-POINT CONSISTENCY, -FFLOAT-STORE, AND X86


On Thu, Dec 17, 1998 at 04:42:40AM -0500, N8TM@aol.com wrote:
>  IAW, how is 64 bit rounding mode going to be faster? For me, it seems this
>  creates a similar situation to the float->integer conversion, i.e. save and
>  restoring the control word with each assignment. >>

> Although I haven't seen anyone specify this, I assume they mean to leave
> 64-bit mode set throughout the program, or at least for the duration of any

This might break any third-party libraries and/or the system libm if it uses
extended precision to implement double-precision operations.

IAW, this functionality must be off by default, similar to -malign-double.

      -----==-                                              |
      ----==-- _                                            |
      ---==---(_)__  __ ____  __       Marc Lehmann       +--
      --==---/ / _ \/ // /\ \/ /       pcg@goof.com       |e|
      -=====/_/_//_/\_,_/ /_/\_\                          --+
    The choice of a GNU generation                        |
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