FCVTZS (scalar, fixed-point)

Floating-point convert to signed fixed-point, rounding toward zero (scalar)

This instruction converts the floating-point value in the SIMD&FP source register to a 32-bit or 64-bit fixed-point signed integer using the Round towards Zero rounding mode, and writes the result to the general-purpose destination register.

This instruction can generate a floating-point exception. Depending on the settings in FPCR, the exception results in either a flag being set in FPSR or a synchronous exception being generated. For more information, see Floating-point exceptions and exception traps.

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.

Decode for all variants of this encoding

if !IsFeatureImplemented(FEAT_FP) then EndOfDecode(Decode_UNDEF); end; if ftype == '10' then EndOfDecode(Decode_UNDEF); end; if ftype == '11' && !IsFeatureImplemented(FEAT_FP16) then EndOfDecode(Decode_UNDEF); end; if sf == '0' && scale[5] == '0' then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let intsize : integer{} = 32 << UInt(sf); let decode_fltsize : integer{} = 8 << UInt(ftype XOR '10'); let fracbits : integer = 64 - UInt(scale); let rounding : FPRounding = FPRounding_ZERO; let unsigned : boolean = FALSE;