| 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 |