load8_lane: Wasm SIMD load instruction

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (memory $memory 1)
  (data (i32.const 0) "\01\02\03\04\05\06\07\08\09\0a\0b\0c\0d\0e\0f\00\01\02\03")
  (func $main
    i32.const 0
    v128.const i8x16 10 4 6 5 8 7 11 3 8 12 9 7 2 31 9 1
    v128.load8_lane 9
    i8x16.extract_lane_s 9
    call $log
  )
  (start $main)
)

WebAssembly.instantiateStreaming(fetch("{%wasm-url%}"), { console });

Syntax

;; Common usage
v128.load8_lane lane_value

;; With optional immediates
v128.load8_lane memidx offset=int align=int lane_value

v128.load8_lane

The v128.load8_lane instruction.

memidx Optional

An integer representing the memory index, in cases where the module uses multiple memories. The default is 0.

offset=int Optional

An integer representing a constant number of bytes to add to the memory address before loading. The default is 0.

align=int Optional

An integer representing a hint to the Wasm engine about what alignment to expect for the final address. The minimum, default, and maximum value is 1.

lane_value

The lane to load a value into.

Type

[memory_address, input] -> [output]

memory_address

An integer representing the memory address to load from.

input

The input v128 type i8x16 value interpretation.

output

The output v128 type i8x16 value interpretation.

Binary encoding

Specifications

Browser compatibility

See also

• SIMD load instructions