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2025-08-16riscv: fix setjmp assembly when compiling for ilp32f/lp64f.Alex Rønne Petersen-24/+36
per the psABI, floating point register contents beyond the register size of the targeted ABI variant are never call-saved, so no hwcap-conditional logic is needed here and the assembly-time conditions are based purely on ABI variant macros, not the targeted ISA level.
2024-02-29riscv32: add setjmp/longjmp and sigreturnStefan O'Rear-0/+83
Largely copied from riscv64 but required recalculation of offsets.