The pmin instruction compares two v128 floating point value interpretations and returns a new interpretation with each output lane set to the smaller of the corresponding input lanes. It is defined as b < a ? b : a, meaning that NaN in the first operand propagates to the output but NaN in the second operand does not — unlike min, which propagates NaN from either operand.

(module
  (import "console" "log" (func $log (param f32)))
  (func $main
    ;; load two v128 f32x4s onto the stack
    v128.const f32x4 52.6 101.2 78.0 9.9
    v128.const f32x4 51.9 102.0 78.1 -0.9

    ;; return a f32x4 containing the smallest values from each input lane
    f32x4.pmin
    f32x4.extract_lane 3 ;; Extract a single lane
    call $log ;; log the result
  )
  (start $main)
)

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

Syntax

value_type.pmin

• value_type

  • : The type of value the instruction is being run on. The following types support pmin:

    • f32x4

    • f64x2

  pmin

  • : The pmin instruction. Must always be included after the value_type and a period (.).

Type

[input1, input2] -> [output]

• input1

  • : The first input value.

  input2

  • : The second input value.

  output

  • : The output value.

Binary encoding

InstructionBinary formatExample text => binaryf32x4.pmin0xfd 234:u32f32x4.pmin => 0xfd 0xea 0x01f64x2.pmin0xfd 246:u32f64x2.pmin => 0xfd 0xf6 0x01

Specifications

Browser compatibility

See also

• min

• min_s

• min_u