I am not sure I understand your question correctly, but Fortran uses the KIND mechanism to declare the precise characteristics of floating-point variables and constants. Typically, these are identifying integer numbers for single precision, double precision and quadruple precision. A custom floating-point type would mean an additional KIND number with the relevant runtime support and support from the various intrinsic functions and modules In the directory gcc/fortran I find several source files that use the typedef gfc_real_info and the array of kinds gfc_rel_kinds to deal with floating-point data of various kinds. Would that help? (Caveat: I am a mere beginner, and perhaps not even that, when it comes to the internals of the GCC compiler suite)
Regards, Arjen Op za 23 okt. 2021 om 03:28 schreef Amit Hmath via Fortran < fortran@gcc.gnu.org>: > Hello All, > > I am working on a custom float in RISC-V 32, one can replace keyword > "float" with custom keyword like "fp_custom" at line # 482 > riscv-gcc/gcc/c-family/c-common.c. But in the case of Fortran, can you > please tell which files to modify to replace the "float" keyword? > > And also, in case of c/c++ one can do custom encoding and decoding of > custom floats in gcc/real.c how about in fortran for custom real data type, > which file(s) one has to modify? > > Many Thanks, > -Amit >
