SIMD.shiftLeftByScalar

SIMD.js has been taken out of active development in TC39 and removed from Stage 3. It is not being pursued by web browsers for implementation anymore. SIMD operations exposed to the web are under active development within WebAssembly, with operations based on the SIMD.js operations.

The static SIMD.%type%.shiftLeftByScalar() method returns a new instance with the lane values shifted left by a given bit count (a << bits).

Syntax

SIMD.Int8x16.shiftLeftByScalar(a, bits)
SIMD.Int16x8.shiftLeftByScalar(a, bits)
SIMD.Int32x4.shiftLeftByScalar(a, bits)

SIMD.Uint8x16.shiftLeftByScalar(a, bits)
SIMD.Uint16x8.shiftLeftByScalar(a, bits)
SIMD.Uint32x4.shiftLeftByScalar(a, bits)

Parameters

a

An instance of a SIMD type.

bits

Bit count to shift by.

Return value

A new corresponding SIMD data type with the lane values shifted left by a given bit count (a << bits).

Description

The bitwise left shift operation shifts the specified number of bits to the left. Excess bits shifted off to the left are discarded. Zero bits are shifted in from the right.

For example, a bitwise left shift of 5 << 1 results in 1010 which is 10 in decimal.

5  0101
   ----
10 1010

Examples

Bitwise left shift of an Int32x4

var a = SIMD.Int32x4(1, 2, 4, 8);
SIMD.Int32x4.shiftLeftByScalar(a, 1);
// Int32x4[2, 4, 8, 16]

Specifications

Browser compatibility

See also

• SIMD
• Bitwise operators