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This includes the filterDoubles function which adds code to combine 32 bit values into doubles or 64 bit values for floating point, and the splitOutImm function which detects if the code that implements an instruction has a register and immediate variant, and generates code for each. Change-Id: I5524b9acd6e610b51fd91fe70276c34c23be9f85 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35235 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>