20.152 SHL (vector)

Shift Left (immediate).

Syntax

SHL Vd.T, Vn.T, #shift

Where:

Vd
Is the name of the SIMD and FP destination register.
T
Is an arrangement specifier, and can be one of the values shown in Usage.
Vn
Is the name of the SIMD and FP source register.
shift
Is the left shift amount, in the range 0 to the element width in bits minus 1, and can be one of the values shown in Usage.

Usage

Shift Left (immediate). This instruction reads each value from a vector, right shifts each result by an immediate value, writes the final result to a vector, and writes the vector to the destination SIMD and FP register.

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.

The following table shows the valid specifier combinations:

Table 20-43 SHL (Vector) specifier combinations

T shift
8B 0 to 7
16B 0 to 7
4H 0 to 15
8H 0 to 15
2S 0 to 31
4S 0 to 31
2D 0 to 63
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