FCVTZU (scalar, fixed-point)
Floating-point Convert to Unsigned fixed-point, rounding toward Zero (vector).
- Is a width specifier, and can be one of the values shown in Usage.
- Is the number of the SIMD and FP destination register.
- Is the number of the first SIMD and FP source register.
- Is the number of fractional bits, in the range 1 to the operand width.
Floating-point Convert to Unsigned fixed-point, rounding toward Zero (vector). This instruction converts a scalar or each element in a vector from floating-point to fixed-point unsigned integer using the Round towards Zero rounding mode, and writes the result to the general-purpose destination register.
A floating-point exception can be generated by this instruction. Depending on the settings in FPCR in the ARMv8-A Architecture Reference Manual, the exception results in either a flag being set in FPSR in the ARMv8-A Architecture Reference Manual, or a synchronous exception being generated. For more information, see Floating-point exception traps in the ARMv8-A Architecture Reference Manual.
Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the Security state and Exception level in which the instruction is executed, an attempt to execute the instruction might be trapped.
The following table shows the valid specifier combinations:
Table 19-5 FCVTZU (Scalar) specifier combinations
|S||1 to 32|
|D||1 to 64|