• Operand: 0xC1E0000000000000.
• Instruction: fcvt.w.d
• rounded_abs: 0xffffffff80000000 (correct signed integer result for the given input) (verified with Spike)
• rounded_int_res: 0x0000000080000000
• rounded_sign: 1 (straight from the input operand)

What is the purpose of this statement? if this is inverting the obtained answer...
assign rounded_int_res = rounded_sign ? unsigned'(-rounded_abs) : rounded_abs;