| | 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` |
