| Instruction                     | LLVM[1]                   | V8[2]              | WAVM[3]            | ChakraCore[4]      | SpiderMonkey[5]    |
| --------------------------------|---------------------------|--------------------|--------------------|--------------------|--------------------|
| `v128.load`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.load8x8_s`                |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load8x8_u`                |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load16x4_s`               |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load16x4_u`               |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load32x2_s`               |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load32x2_u`               |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load8_splat`              |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load16_splat`             |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load32_splat`             |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load64_splat`             |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.store`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.const`                    | `-munimplemented-simd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.shuffle`                 |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.swizzle`                 |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.splat`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.extract_lane_s`          |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.extract_lane_u`          |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.extract_lane_s`          |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.extract_lane_u`          |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.extract_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.extract_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.extract_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.extract_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.replace_lane`            |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.eq`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.ne`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.lt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.lt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.gt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.gt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.le_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.le_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.ge_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.ge_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.eq`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.ne`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.lt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.lt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.gt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.gt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.le_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.le_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.ge_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.ge_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.eq`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.ne`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.lt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.lt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.gt_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.gt_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.le_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.le_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.ge_s`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.ge_u`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.eq`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.ne`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.lt`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.gt`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.le`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.ge`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.eq`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.ne`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.lt`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.gt`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.le`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.ge`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.not`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.and`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.andnot`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.or`                       |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.xor`                      |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `v128.bitselect`                |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.abs`                     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.all_true`                |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.bitmask`                 | `-munimplemented-simd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.narrow_i16x8_s`          |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.narrow_i16x8_u`          |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.shl`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.shr_s`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.shr_u`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.add_sat_s`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.add_sat_u`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.sub_sat_s`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.sub_sat_u`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i8x16.min_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.min_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.max_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.max_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.avgr_u`                  |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.abs`                     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.all_true`                |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.bitmask`                 | `-munimplemented-simd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.narrow_i32x4_s`          |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.narrow_i32x4_u`          |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extend_low_i8x16_s`      |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extend_high_i8x16_s`     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extend_low_i8x16_u`      |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extend_high_i8x16_u`     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.shl`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.shr_s`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.shr_u`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.add_sat_s`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.add_sat_u`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.sub_sat_s`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.sub_sat_u`               |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.mul`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i16x8.min_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.min_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.max_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.max_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.avgr_u`                  |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.q15mulr_sat_s`           |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.abs`                     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.all_true`                |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.bitmask`                 | `-munimplemented-simd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extend_low_i16x8_s`      |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extend_high_i16x8_s`     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extend_low_i16x8_u`      |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extend_high_i16x8_u`     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.shl`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.shr_s`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.shr_u`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.mul`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.min_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.min_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.max_s`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.max_u`                   |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.dot_i16x8_s`             |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.eq`                      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.abs`                     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.all_true`                |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.bitmask`                 |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.shl`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.shr_s`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.shr_u`                   |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i64x2.mul`                     |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extend_low_i32x4_s`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extend_high_i32x4_s`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extend_low_i32x4_u`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extend_high_i32x4_u`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.abs`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.sqrt`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.mul`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.div`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.min`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.max`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.pmin`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.pmax`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.ceil`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.floor`                   |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.trunc`                   |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.nearest`                 |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.abs`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.neg`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.sqrt`                    |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.add`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.sub`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.mul`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.div`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.min`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.max`                     |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f64x2.pmin`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.pmax`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.ceil`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.floor`                   |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.trunc`                   |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.nearest`                 |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.trunc_sat_f32x4_s`       |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `i32x4.trunc_sat_f32x4_u`       |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.convert_i32x4_s`         |               `-msimd128` | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: |
| `f32x4.convert_i32x4_u`         |               `-msimd128` | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load32_zero`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load64_zero`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extmul_low_i8x16_s`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extmul_high_i8x16_s`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extmul_low_i8x16_u`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extmul_high_i8x16_u`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extmul_low_i16x8_s`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extmul_high_i16x8_s`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extmul_low_i16x8_u`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extmul_high_i16x8_u`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extmul_low_i32x4_s`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extmul_high_i32x4_s`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extmul_low_i32x4_u`      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.extmul_high_i32x4_u`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.any_true`                 |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load8_lane`               |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load16_lane`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load32_lane`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.load64_lane`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.store8_lane`              |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.store16_lane`             |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.store32_lane`             |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `v128.store64_lane`             |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.ne`                      |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.convert_low_i32x4_s`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.convert_low_i32x4_u`     |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.trunc_sat_f64x2_s_zero`  |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.trunc_sat_f64x2_u_zero`  |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f32x4.demote_f64x2_zero`       |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `f64x2.promote_low_f32x4`       |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i8x16.popcnt`                  |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extadd_pairwise_i8x16_s` |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i16x8.extadd_pairwise_i8x16_u` |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extadd_pairwise_i16x8_s` |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i32x4.extadd_pairwise_i16x8_u` |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.lt_s`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.gt_s`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.le_s`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |
| `i64x2.ge_s`                    |                           | :heavy_check_mark: |                    |                    | :heavy_check_mark: |

[1] Tip of tree LLVM as of May 20, 2020

[2] V8 9.1.0.

[3] Not known to be updated after latest renumbering. Requires flag `--enable simd`

[4] Only in 1.12.* (development branch). Requires (case-insensitive) flag `-wasmsimd`

[5] Firefox x64/x86 (SSE4.1+ only) from FF89, ARM64 from FF90. Earlier versions control in about:config under `javascript.options.wasm_simd`