| | Memory instruction | opcode | |
| | ------------------ | ------ | |
| | v128.load | 0x00 | |
| | v128.load8x8_s | 0x01 | |
| | v128.load8x8_u | 0x02 | |
| | v128.load16x4_s | 0x03 | |
| | v128.load16x4_u | 0x04 | |
| | v128.load32x2_s | 0x05 | |
| | v128.load32x2_u | 0x06 | |
| | v128.load8_splat | 0x07 | |
| | v128.load16_splat | 0x08 | |
| | v128.load32_splat | 0x09 | |
| | v128.load64_splat | 0x0a | |
| | v128.store | 0x0b | |
| |
| | Basic operation | opcode | |
| | ----------------| ------ | |
| | v128.const | 0x0c | |
| | i8x16.shuffle | 0x0d | |
| | i8x16.swizzle | 0x0e | |
| |
| | Splat operation | opcode | |
| | --------------- | ------ | |
| | i8x16.splat | 0x0f | |
| | i16x8.splat | 0x10 | |
| | i32x4.splat | 0x11 | |
| | i64x2.splat | 0x12 | |
| | f32x4.splat | 0x13 | |
| | f64x2.splat | 0x14 | |
| |
| | Lane operation | opcode | |
| | -------------------- | ------ | |
| | i8x16.extract_lane_s | 0x15 | |
| | i8x16.extract_lane_u | 0x16 | |
| | i8x16.replace_lane | 0x17 | |
| | i16x8.extract_lane_s | 0x18 | |
| | i16x8.extract_lane_u | 0x19 | |
| | i16x8.replace_lane | 0x1a | |
| | i32x4.extract_lane | 0x1b | |
| | i32x4.replace_lane | 0x1c | |
| | i64x2.extract_lane | 0x1d | |
| | i64x2.replace_lane | 0x1e | |
| | f32x4.extract_lane | 0x1f | |
| | f32x4.replace_lane | 0x20 | |
| | f64x2.extract_lane | 0x21 | |
| | f64x2.replace_lane | 0x22 | |
| |
| | i8x16 Cmp | opcode | i16x8 Cmp | opcode | i32x4 Cmp | opcode | |
| | ---------- | ------ | ---------- | ------ | ---------- | ------ | |
| | i8x16.eq | 0x23 | i16x8.eq | 0x2d | i32x4.eq | 0x37 | |
| | i8x16.ne | 0x24 | i16x8.ne | 0x2e | i32x4.ne | 0x38 | |
| | i8x16.lt_s | 0x25 | i16x8.lt_s | 0x2f | i32x4.lt_s | 0x39 | |
| | i8x16.lt_u | 0x26 | i16x8.lt_u | 0x30 | i32x4.lt_u | 0x3a | |
| | i8x16.gt_s | 0x27 | i16x8.gt_s | 0x31 | i32x4.gt_s | 0x3b | |
| | i8x16.gt_u | 0x28 | i16x8.gt_u | 0x32 | i32x4.gt_u | 0x3c | |
| | i8x16.le_s | 0x29 | i16x8.le_s | 0x33 | i32x4.le_s | 0x3d | |
| | i8x16.le_u | 0x2a | i16x8.le_u | 0x34 | i32x4.le_u | 0x3e | |
| | i8x16.ge_s | 0x2b | i16x8.ge_s | 0x35 | i32x4.ge_s | 0x3f | |
| | i8x16.ge_u | 0x2c | i16x8.ge_u | 0x36 | i32x4.ge_u | 0x40 | |
| |
| | f32x4 Cmp | opcode | f64x2 Cmp | opcode | |
| | --------- | ------ | --------- | ------ | |
| | f32x4.eq | 0x41 | f64x2.eq | 0x47 | |
| | f32x4.ne | 0x42 | f64x2.ne | 0x48 | |
| | f32x4.lt | 0x43 | f64x2.lt | 0x49 | |
| | f32x4.gt | 0x44 | f64x2.gt | 0x4a | |
| | f32x4.le | 0x45 | f64x2.le | 0x4b | |
| | f32x4.ge | 0x46 | f64x2.ge | 0x4c | |
| |
| | v128 Op | opcode | |
| | -------------- | ------ | |
| | v128.not | 0x4d | |
| | v128.and | 0x4e | |
| | v128.andnot | 0x4f | |
| | v128.or | 0x50 | |
| | v128.xor | 0x51 | |
| | v128.bitselect | 0x52 | |
| | v128.any_true | 0x53 | |
| |
| | Load Lane Op | opcode | |
| | ----------------- | ------ | |
| | v128.load8_lane | 0x54 | |
| | v128.load16_lane | 0x55 | |
| | v128.load32_lane | 0x56 | |
| | v128.load64_lane | 0x57 | |
| | v128.store8_lane | 0x58 | |
| | v128.store16_lane | 0x59 | |
| | v128.store32_lane | 0x5a | |
| | v128.store64_lane | 0x5b | |
| | v128.load32_zero | 0x5c | |
| | v128.load64_zero | 0x5d | |
| |
| | Float conversion | opcode | |
| | ----------------------- | ------ | |
| | f32x4.demote_f64x2_zero | 0x5e | |
| | f64x2.promote_low_f32x4 | 0x5f | |
| |
| | i8x16 Op | opcode | i16x8 Op | opcode | i32x4 Op | opcode | i64x2 Op | opcode | |
| | ----------------------------- | ------ | ------------------------- | ------ | ------------------------- | ------ | ------------------------- | ------ | |
| | i8x16.abs | 0x60 | i16x8.abs | 0x80 | i32x4.abs | 0xa0 | i64x2.abs | 0xc0 | |
| | i8x16.neg | 0x61 | i16x8.neg | 0x81 | i32x4.neg | 0xa1 | i64x2.neg | 0xc1 | |
| | i8x16.popcnt | 0x62 | i16x8.q15mulr_sat_s | 0x82 | | 0xa2 | ------------- | 0xc2 | |
| | i8x16.all_true | 0x63 | i16x8.all_true | 0x83 | i32x4.all_true | 0xa3 | i64x2.all_true | 0xc3 | |
| | i8x16.bitmask | 0x64 | i16x8.bitmask | 0x84 | i32x4.bitmask | 0xa4 | i64x2.bitmask | 0xc4 | |
| | i8x16.narrow_i16x8_s | 0x65 | i16x8.narrow_i32x4_s | 0x85 | ---- narrow ---- | 0xa5 | ------------- | 0xc5 | |
| | i8x16.narrow_i16x8_u | 0x66 | i16x8.narrow_i32x4_u | 0x86 | ---- narrow ---- | 0xa6 | ------------- | 0xc6 | |
| | f32x4.ceil | 0x67 | i16x8.extend_low_i8x16_s | 0x87 | i32x4.extend_low_i16x8_s | 0xa7 | i64x2.extend_low_i32x4_s | 0xc7 | |
| | f32x4.floor | 0x68 | i16x8.extend_high_i8x16_s | 0x88 | i32x4.extend_high_i16x8_s | 0xa8 | i64x2.extend_high_i32x4_s | 0xc8 | |
| | f32x4.trunc | 0x69 | i16x8.extend_low_i8x16_u | 0x89 | i32x4.extend_low_i16x8_u | 0xa9 | i64x2.extend_low_i32x4_u | 0xc9 | |
| | f32x4.nearest | 0x6a | i16x8.extend_high_i8x16_u | 0x8a | i32x4.extend_high_i16x8_u | 0xaa | i64x2.extend_high_i32x4_u | 0xca | |
| | i8x16.shl | 0x6b | i16x8.shl | 0x8b | i32x4.shl | 0xab | i64x2.shl | 0xcb | |
| | i8x16.shr_s | 0x6c | i16x8.shr_s | 0x8c | i32x4.shr_s | 0xac | i64x2.shr_s | 0xcc | |
| | i8x16.shr_u | 0x6d | i16x8.shr_u | 0x8d | i32x4.shr_u | 0xad | i64x2.shr_u | 0xcd | |
| | i8x16.add | 0x6e | i16x8.add | 0x8e | i32x4.add | 0xae | i64x2.add | 0xce | |
| | i8x16.add_sat_s | 0x6f | i16x8.add_sat_s | 0x8f | ---- add_sat ---- | 0xaf | ------------- | 0xcf | |
| | i8x16.add_sat_u | 0x70 | i16x8.add_sat_u | 0x90 | ---- add_sat ---- | 0xb0 | ------------- | 0xd0 | |
| | i8x16.sub | 0x71 | i16x8.sub | 0x91 | i32x4.sub | 0xb1 | i64x2.sub | 0xd1 | |
| | i8x16.sub_sat_s | 0x72 | i16x8.sub_sat_s | 0x92 | ---- sub_sat ---- | 0xb2 | ------------- | 0xd2 | |
| | i8x16.sub_sat_u | 0x73 | i16x8.sub_sat_u | 0x93 | ---- sub_sat ---- | 0xb3 | ------------- | 0xd3 | |
| | f64x2.ceil | 0x74 | f64x2.nearest | 0x94 | ------------- | 0xb4 | ------------- | 0xd4 | |
| | f64x2.floor | 0x75 | i16x8.mul | 0x95 | i32x4.mul | 0xb5 | i64x2.mul | 0xd5 | |
| | i8x16.min_s | 0x76 | i16x8.min_s | 0x96 | i32x4.min_s | 0xb6 | i64x2.eq | 0xd6 | |
| | i8x16.min_u | 0x77 | i16x8.min_u | 0x97 | i32x4.min_u | 0xb7 | i64x2.ne | 0xd7 | |
| | i8x16.max_s | 0x78 | i16x8.max_s | 0x98 | i32x4.max_s | 0xb8 | i64x2.lt_s | 0xd8 | |
| | i8x16.max_u | 0x79 | i16x8.max_u | 0x99 | i32x4.max_u | 0xb9 | i64x2.gt_s | 0xd9 | |
| | f64x2.trunc | 0x7a | | 0x9a | i32x4.dot_i16x8_s | 0xba | i64x2.le_s | 0xda | |
| | i8x16.avgr_u | 0x7b | i16x8.avgr_u | 0x9b | ---- avgr_u ---- | 0xbb | i64x2.ge_s | 0xdb | |
| | i16x8.extadd_pairwise_i8x16_s | 0x7c | i16x8.extmul_low_i8x16_s | 0x9c | i32x4.extmul_low_i16x8_s | 0xbc | i64x2.extmul_low_i32x4_s | 0xdc | |
| | i16x8.extadd_pairwise_i8x16_u | 0x7d | i16x8.extmul_high_i8x16_s | 0x9d | i32x4.extmul_high_i16x8_s | 0xbd | i64x2.extmul_high_i32x4_s | 0xdd | |
| | i32x4.extadd_pairwise_i16x8_s | 0x7e | i16x8.extmul_low_i8x16_u | 0x9e | i32x4.extmul_low_i16x8_u | 0xbe | i64x2.extmul_low_i32x4_u | 0xde | |
| | i32x4.extadd_pairwise_i16x8_u | 0x7f | i16x8.extmul_high_i8x16_u | 0x9f | i32x4.extmul_high_i16x8_u | 0xbf | i64x2.extmul_high_i32x4_u | 0xdf | |
| |
| | f32x4 Op | opcode | f64x2 Op | opcode | |
| | --------------- | ------ | --------------- | ------ | |
| | f32x4.abs | 0xe0 | f64x2.abs | 0xec | |
| | f32x4.neg | 0xe1 | f64x2.neg | 0xed | |
| | ---- round ---- | 0xe2 | ---- round ---- | 0xee | |
| | f32x4.sqrt | 0xe3 | f64x2.sqrt | 0xef | |
| | f32x4.add | 0xe4 | f64x2.add | 0xf0 | |
| | f32x4.sub | 0xe5 | f64x2.sub | 0xf1 | |
| | f32x4.mul | 0xe6 | f64x2.mul | 0xf2 | |
| | f32x4.div | 0xe7 | f64x2.div | 0xf3 | |
| | f32x4.min | 0xe8 | f64x2.min | 0xf4 | |
| | f32x4.max | 0xe9 | f64x2.max | 0xf5 | |
| | f32x4.pmin | 0xea | f64x2.pmin | 0xf6 | |
| | f32x4.pmax | 0xeb | f64x2.pmax | 0xf7 | |
| |
| | Conversion Op | opcode | |
| | ---------------------------- | ------ | |
| | i32x4.trunc_sat_f32x4_s | 0xf8 | |
| | i32x4.trunc_sat_f32x4_u | 0xf9 | |
| | f32x4.convert_i32x4_s | 0xfa | |
| | f32x4.convert_i32x4_u | 0xfb | |
| | i32x4.trunc_sat_f64x2_s_zero | 0xfc | |
| | i32x4.trunc_sat_f64x2_u_zero | 0xfd | |
| | f64x2.convert_low_i32x4_s | 0xfe | |
| | f64x2.convert_low_i32x4_u | 0xff | |
