SCVTF (vector, fixed-point)

Signed fixed-point convert to floating-point (vector)

This instruction converts each element in a vector from fixed-point to floating-point using the rounding mode that is specified by the FPCR, and writes the result to the SIMD&FP 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.

It has encodings from 2 classes: Scalar and Vector

Scalar
(FEAT_AdvSIMD)

Decode for this encoding

if !IsFeatureImplemented(FEAT_AdvSIMD) then EndOfDecode(Decode_UNDEF); end; if immh IN {'000x'} || (immh IN {'001x'} && !IsFeatureImplemented(FEAT_FP16)) then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let esize : integer{} = if immh IN {'1xxx'} then 64 else if immh IN {'01xx'} then 32 else 16; let datasize : integer{} = esize; let elements : integer = 1; let fracbits : integer = (esize * 2) - UInt(immh::immb); let unsigned : boolean = FALSE;

Vector
(FEAT_AdvSIMD)

Decode for this encoding

if !IsFeatureImplemented(FEAT_AdvSIMD) then EndOfDecode(Decode_UNDEF); end; if immh IN {'000x'} || (immh IN {'001x'} && !IsFeatureImplemented(FEAT_FP16)) then EndOfDecode(Decode_UNDEF); end; if immh[3]::Q == '10' then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let esize : integer{} = if immh IN {'1xxx'} then 64 else if immh IN {'01xx'} then 32 else 16; let datasize : integer{} = 64 << UInt(Q); let elements : integer = datasize DIV esize; let fracbits : integer = (esize * 2) - UInt(immh::immb); let unsigned : boolean = FALSE;