SSHR

Signed shift right (immediate)

This instruction reads each vector element in the source SIMD&FP register, right shifts each result by an immediate value, places the final result into a vector, and writes the vector to the destination SIMD&FP register. All the values in this instruction are signed integer values. The results are truncated. For rounded results, see SRSHR.

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[3] != '1' then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let esize : integer{} = 8 << 3; let datasize : integer{} = esize; let elements : integer = 1; let shift : integer = (esize * 2) - UInt(immh::immb); let unsigned : boolean = FALSE; let round : boolean = FALSE;

Vector
(FEAT_AdvSIMD)

Decode for this encoding

if !IsFeatureImplemented(FEAT_AdvSIMD) 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{} = 8 << HighestSetBitNZ(immh); let datasize : integer{} = 64 << UInt(Q); let elements : integer = datasize DIV esize; let shift : integer = (esize * 2) - UInt(immh::immb); let unsigned : boolean = FALSE; let round : boolean = FALSE;