Hello. The fromfp/fromfpx variants round to integers with a specified number of bits, to a specified rounding mode. They come with their own complications as Joseph had stated in an initial mail and expected to expand them in AArch64 :
> The fromfp / fromfpx / ufromfp / ufromfpx functions (round to integers > of a specified number of bits, in a specified rounding mode, with > specified handling of inexact results) are a case with some other > complications. Typically I'd expect them to be expanded inline only (for > constant arguments or) for constant values of the number of bits and > rounding mode, if the target machine has an appropriate instruction. A > target hook would need adding for a target to specify the FP_INT_* values > used in libm, since that's an ABI that's defined by libm, not by GCC. > Then you'd need instruction patterns that might only be supported in > certain cases. How can I add a target hook to specify the FP_INT_* values from libm ? Also as this includes rounding to integers, does it involve any RTL related complications that we have encountered in FADD ? Thanks, Tejas
