shr_s: Wasm SIMD bitwise instruction

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (func $main
    v128.const i32x4 8 16 32 64
    i32.const 3

    i32x4.shr_s
    i32x4.extract_lane 3
    call $log ;; log the result
  )
  (start $main)
)

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

Syntax

value_type.shr_s

value_type

The type of value the instruction is being run on. The following v128 value interpretations support shr_s:

i8x16
i16x8
i32x4
i64x2

shr_s

The shr_s instruction. Must always be included after the value_type and a period (.).

Type

[input, shift_value] -> [output]

input: The input v128 value interpretation.
shift_value: The value that you want to shift the lanes by.
output: The output v128 value interpretation.

Binary encoding

Instruction	Binary format	Example text => binary
`i8x16.shr_s`	`0xfd 108:u32`	`i8x16.shr_s` => `0xfd 0x6c`
`i16x8.shr_s`	`0xfd 140:u32`	`i16x8.shr_s` => `0xfd 0x8c 0x01`
`i32x4.shr_s`	`0xfd 172:u32`	`i32x4.shr_s` => `0xfd 0xac 0x01`
`i64x2.shr_s`	`0xfd 204:u32`	`i64x2.shr_s` => `0xfd 0xcc 0x01`