FCVT

Floating-point Convert precision (scalar). This instruction converts the floating-point value in the SIMD&FP source register to the precision for the destination register data type using the rounding mode that is determined by the FPCR and writes the result to the SIMD&FP destination register.

Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.

integer d = UInt(Rd); integer n = UInt(Rn); integer srcsize; integer dstsize; if ftype == opc then UNDEFINED; case ftype of when '00' srcsize = 32; when '01' srcsize = 64; when '10' UNDEFINED; when '11' srcsize = 16; case opc of when '00' dstsize = 32; when '01' dstsize = 64; when '10' UNDEFINED; when '11' dstsize = 16;