[llvm] [APFloat][NFCI] Move x87DoubleExtended next to the other native IEEE types (PR #223193)

[Eric Ross via llvm-commits]

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@@ -289,10 +292,7 @@ class APFloatBase {
   LLVM_ABI static const fltSemantics semFloat6E3M2FN;
   LLVM_ABI static const fltSemantics semFloat6E2M3FN;
   LLVM_ABI static const fltSemantics semFloat4E2M1FN;
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ZERICO2005 wrote:

The order of the GPU floating point types is not very consistent in `APFloat`. Here `semFloat4E2M1FN` is the last type, while `S_Float8E5M3FNU` is the last `enum`. Might be good to apply a consistent ordering in the future.


https://github.com/llvm/llvm-project/pull/223193