
Resolve the TODO: on RV32, when constructing the double-precision constant `+0.0` for `s64`, `BuildPairF64Pseudo` can be optimized to use the `fcvt.d.w` instruction to generate the result directly.
Resolve the TODO: on RV32, when constructing the double-precision constant `+0.0` for `s64`, `BuildPairF64Pseudo` can be optimized to use the `fcvt.d.w` instruction to generate the result directly.