SQSHLU

Signed saturating shift left unsigned (immediate)

This instruction reads each signed integer value in the vector of the source SIMD&FP register, shifts each value by an immediate value, saturates the shifted result to an unsigned integer value, places the result in a vector, and writes the vector to the destination SIMD&FP register. The results are truncated. For rounded results, see UQRSHL.

If saturation occurs, the cumulative saturation bit FPSR.QC is set.

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); if immh == '0000' then EndOfDecode(Decode_UNDEF); constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer esize = 8 << HighestSetBitNZ(immh); constant integer datasize = esize; constant integer elements = 1; constant integer shift = UInt(immh:immb) - esize; constant boolean src_unsigned = FALSE; constant boolean dst_unsigned = TRUE;

Vector
(FEAT_AdvSIMD)

Decode for this encoding

if !IsFeatureImplemented(FEAT_AdvSIMD) then EndOfDecode(Decode_UNDEF); if immh == '0000' then SEE(asimdimm); if immh<3>:Q == '10' then EndOfDecode(Decode_UNDEF); constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer esize = 8 << HighestSetBitNZ(immh); constant integer datasize = 64 << UInt(Q); constant integer elements = datasize DIV esize; constant integer shift = UInt(immh:immb) - esize; constant boolean src_unsigned = FALSE; constant boolean dst_unsigned = TRUE;