Version 27 (modified by trac, 5 years ago) (diff) |
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## GCN ISA VOP3 instructions

The VOP3 instructions requires two dword to store in program code. By default, these encoding of these instructions gives all features of the VOP3 encoding: all possible modifiers, any source operand combination.

List of fields for the VOP3A/VOP3B encoding (GCN 1.0/1.1):

Bits | Name | Description |
---|---|---|

0-7 | VDST | Vector destination operand |

8-10 | ABS | Absolute modifiers for source operands (VOP3A) |

8-14 | SDST | Scalar destination operand (VOP3B) |

11 | CLAMP | CLAMP modifier (VOP3A) |

15 | CLAMP | CLAMP modifier (VOP3B) |

17-25 | OPCODE | Operation code |

26-31 | ENCODING | Encoding type. Must be 0b110100 |

32-40 | SRC0 | First (scalar or vector) source operand |

41-49 | SRC1 | Second (scalar or vector) source operand |

50-58 | SRC2 | Third (scalar or vector) source operand |

59-60 | OMOD | OMOD modifier. Multiplication modifier |

61-63 | NEG | Negation modifier for source operands |

List of fields for VOP3A/VOP3B encoding (GCN 1.2):

Bits | Name | Description |
---|---|---|

0-7 | VDST | Destination vector operand |

8-10 | ABS | Absolute modifiers for source operands (VOP3A) |

8-14 | SDST | Scalar destination operand (VOP3B) |

15 | CLAMP | CLAMP modifier |

16-25 | OPCODE | Operation code |

26-31 | ENCODING | Encoding type. Must be 0b110100 |

32-40 | SRC0 | First (scalar or vector) source operand |

41-49 | SRC1 | Second (scalar or vector) source operand |

50-58 | SRC2 | Third (scalar or vector) source operand |

59-60 | OMOD | OMOD modifier. Multiplication modifier |

61-63 | NEG | Negation modifier for source operands |

Typical syntax: INSTRUCTION VDST, SRC0, SRC1, SRC2 [MODIFIERS]

Modifiers:

- CLAMP - clamps destination floating point value in range 0.0-1.0
- MUL:2, MUL:4, DIV:2 - OMOD modifiers. Multiply destination floating point value by 2.0, 4.0 or 0.5 respectively. Clamping applied after OMOD modifier.
- -SRC - negate floating point value from source operand. Applied after ABS modifier.
- ABS(SRC), |SRC| - apply absolute value to source operand

NOTE: OMOD modifier doesn't work if output denormals are allowed
(5 bit of MODE register for single precision or 7 bit for double precision).

NOTE: OMOD and CLAMP modifier affects only for instruction that output is
floating point value.

NOTE: ABS and negation is applied to source operand for any instruction.

Negation and absolute value can be combined: `-ABS(V0)`

. Modifiers CLAMP and
OMOD (MUL:2, MUL:4 and DIV:2) can be given in random order.

Limitations for operands:

- only one SGPR can be read by instruction. Multiple occurrences of this same SGPR is allowed
- only one literal constant can be used, and only when a SGPR or M0 is not used in source operands
- only SRC0 can holds LDS_DIRECT

Unaligned pairs of SGPRs are allowed in source operands.

List of the instructions by opcode (GCN 1.0/1.1):

Opcode | Mnemonic (GCN 1.0) | Mnemonic (GCN 1.1) |
---|---|---|

320 (0x140) | V_MAD_LEGACY_F32 | V_MAD_LEGACY_F32 |

321 (0x141) | V_MAD_F32 | V_MAD_F32 |

322 (0x142) | V_MAD_I32_I24 | V_MAD_I32_I24 |

323 (0x143) | V_MAD_U32_U24 | V_MAD_U32_U24 |

324 (0x144) | V_CUBEID_F32 | V_CUBEID_F32 |

325 (0x145) | V_CUBESC_F32 | V_CUBESC_F32 |

326 (0x146) | V_CUBETC_F32 | V_CUBETC_F32 |

327 (0x147) | V_CUBEMA_F32 | V_CUBEMA_F32 |

328 (0x148) | V_BFE_U32 | V_BFE_U32 |

329 (0x149) | V_BFE_I32 | V_BFE_I32 |

330 (0x14a) | V_BFI_B32 | V_BFI_B32 |

331 (0x14b) | V_FMA_F32 | V_FMA_F32 |

332 (0x14c) | V_FMA_F64 | V_FMA_F64 |

333 (0x14d) | V_LERP_U8 | V_LERP_U8 |

334 (0x14e) | V_ALIGNBIT_B32 | V_ALIGNBIT_B32 |

335 (0x14f) | V_ALIGNBYTE_B32 | V_ALIGNBYTE_B32 |

336 (0x150) | V_MULLIT_F32 | V_MULLIT_F32 |

337 (0x151) | V_MIN3_F32 | V_MIN3_F32 |

338 (0x152) | V_MIN3_I32 | V_MIN3_I32 |

339 (0x153) | V_MIN3_U32 | V_MIN3_U32 |

340 (0x154) | V_MAX3_F32 | V_MAX3_F32 |

341 (0x155) | V_MAX3_I32 | V_MAX3_I32 |

342 (0x156) | V_MAX3_U32 | V_MAX3_U32 |

343 (0x157) | V_MED3_F32 | V_MED3_F32 |

344 (0x158) | V_MED3_I32 | V_MED3_I32 |

345 (0x159) | V_MED3_U32 | V_MED3_U32 |

346 (0x15a) | V_SAD_U8 | V_SAD_U8 |

347 (0x15b) | V_SAD_HI_U8 | V_SAD_HI_U8 |

348 (0x15c) | V_SAD_U16 | V_SAD_U16 |

349 (0x15d) | V_SAD_U32 | V_SAD_U32 |

350 (0x15e) | V_CVT_PK_U8_F32 | V_CVT_PK_U8_F32 |

351 (0x15f) | V_DIV_FIXUP_F32 | V_DIV_FIXUP_F32 |

352 (0x160) | V_DIV_FIXUP_F64 | V_DIV_FIXUP_F64 |

353 (0x161) | V_LSHL_B64 | V_LSHL_B64 |

354 (0x162) | V_LSHR_B64 | V_LSHR_B64 |

355 (0x163) | V_ASHR_I64 | V_ASHR_I64 |

356 (0x164) | V_ADD_F64 | V_ADD_F64 |

357 (0x165) | V_MUL_F64 | V_MUL_F64 |

358 (0x166) | V_MIN_F64 | V_MIN_F64 |

359 (0x167) | V_MAX_F64 | V_MAX_F64 |

360 (0x168) | V_LDEXP_F64 | V_LDEXP_F64 |

361 (0x169) | V_MUL_LO_U32 | V_MUL_LO_U32 |

362 (0x16a) | V_MUL_HI_U32 | V_MUL_HI_U32 |

363 (0x16b) | V_MUL_LO_I32 | V_MUL_LO_I32 |

364 (0x16c) | V_MUL_HI_I32 | V_MUL_HI_I32 |

365 (0x16d) | V_DIV_SCALE_F32 (VOP3B) | V_DIV_SCALE_F32 (VOP3B) |

366 (0x16e) | V_DIV_SCALE_F64 (VOP3B) | V_DIV_SCALE_F64 (VOP3B) |

367 (0x16f) | V_DIV_FMAS_F32 | V_DIV_FMAS_F32 |

368 (0x170) | V_DIV_FMAS_F64 | V_DIV_FMAS_F64 |

369 (0x171) | V_MSAD_U8 | V_MSAD_U8 |

370 (0x172) | V_QSAD_U8 | V_QSAD_PK_U16_U8 |

371 (0x173) | V_MQSAD_U8 | V_MQSAD_PK_U16_U8 |

372 (0x174) | V_TRIG_PREOP_F64 | V_TRIG_PREOP_F64 |

373 (0x175) | -- | V_MQSAD_U32_U8 |

374 (0x176) | -- | V_MAD_U64_U32 (VOP3B) |

375 (0x177) | -- | V_MAD_I64_I32 (VOP3B) |

List of the instructions by opcode (GCN 1.2):

Opcode | Mnemonic |
---|---|

448 (0x1c0) | V_MAD_LEGACY_F32 |

449 (0x1c1) | V_MAD_F32 |

450 (0x1c2) | V_MAD_I32_I24 |

451 (0x1c3) | V_MAD_U32_U24 |

452 (0x1c4) | V_CUBEID_F32 |

453 (0x1c5) | V_CUBESC_F32 |

454 (0x1c6) | V_CUBETC_F32 |

455 (0x1c7) | V_CUBEMA_F32 |

456 (0x1c8) | V_BFE_U32 |

457 (0x1c9) | V_BFE_I32 |

458 (0x1ca) | V_BFI_B32 |

459 (0x1cb) | V_FMA_F32 |

460 (0x1cc) | V_FMA_F64 |

461 (0x1cd) | V_LERP_U8 |

462 (0x1ce) | V_ALIGNBIT_B32 |

463 (0x1cf) | V_ALIGNBYTE_B32 |

464 (0x1d0) | V_MIN3_F32 |

465 (0x1d1) | V_MIN3_I32 |

466 (0x1d2) | V_MIN3_U32 |

467 (0x1d3) | V_MAX3_F32 |

468 (0x1d4) | V_MAX3_I32 |

469 (0x1d5) | V_MAX3_U32 |

470 (0x1d6) | V_MED3_F32 |

471 (0x1d7) | V_MED3_I32 |

472 (0x1d8) | V_MED3_U32 |

473 (0x1d9) | V_SAD_U8 |

474 (0x1da) | V_SAD_HI_U8 |

475 (0x1db) | V_SAD_U16 |

476 (0x1dc) | V_SAD_U32 |

477 (0x1dd) | V_CVT_PK_U8_F32 |

478 (0x1de) | V_DIV_FIXUP_F32 |

479 (0x1df) | V_DIV_FIXUP_F64 |

480 (0x1e0) | V_DIV_SCALE_F32 (VOP3B) |

481 (0x1e1) | V_DIV_SCALE_F64 (VOP3B) |

482 (0x1e2) | V_DIV_FMAS_F32 |

483 (0x1e3) | V_DIV_FMAS_F64 |

484 (0x1e4) | V_MSAD_U8 |

485 (0x1e5) | V_QSAD_PK_U16_U8 |

486 (0x1e6) | V_MQSAD_PK_U16_U8 |

487 (0x1e7) | V_MQSAD_U32_U8 |

488 (0x1e8) | V_MAD_U64_U32 (VOP3B) |

489 (0x1e9) | V_MAD_I64_I32 (VOP3B) |

490 (0x1ea) | V_MAD_F16 |

491 (0x1eb) | V_MAD_U16 |

492 (0x1ec) | V_MAD_I16 |

493 (0x1ed) | V_PERM_B32 |

494 (0x1ee) | V_FMA_F16 |

495 (0x1ef) | V_DIV_FIXUP_F16 |

496 (0x1f0) | V_CVT_PKACCUM_U8_F32 |

624 (0x270) | V_INTERP_P1_F32 (VINTRP) |

625 (0x271) | V_INTERP_P2_F32 (VINTRP) |

626 (0x272) | V_INTERP_MOV_F32 (VINTRP) |

627 (0x273) | V_INTERP_P1LL_F16 (VINTRP) |

628 (0x274) | V_INTERP_P1LV_F16 (VINTRP) |

629 (0x275) | V_INTERP_P2_F16 (VINTRP) |

640 (0x280) | V_ADD_F64 |

641 (0x281) | V_MUL_F64 |

642 (0x282) | V_MIN_F64 |

643 (0x283) | V_MAX_F64 |

644 (0x284) | V_LDEXP_F64 |

645 (0x285) | V_MUL_LO_U32 |

646 (0x286) | V_MUL_HI_U32 |

647 (0x287) | V_MUL_HI_I32 |

648 (0x288) | V_LDEXP_F32 |

649 (0x289) | V_READLANE_B32 |

650 (0x28a) | V_WRITELANE_B32 |

651 (0x28b) | V_BCNT_U32_B32 |

652 (0x28c) | V_MBCNT_LO_U32_B32 |

653 (0x28d) | V_MBCNT_HI_U32_B32 |

654 (0x28e) | V_MAC_LEGACY_F32 |

655 (0x28f) | V_LSHLREV_B64 |

656 (0x290) | V_LSHRREV_B64 |

657 (0x291) | V_ASHRREV_I64 |

658 (0x292) | V_TRIG_PREOP_F64 |

659 (0x293) | V_BFM_B32 |

660 (0x294) | V_CVT_PKNORM_I16_F32 |

661 (0x295) | V_CVT_PKNORM_U16_F32 |

662 (0x296) | V_CVT_PKRTZ_F16_F32 |

663 (0x297) | V_CVT_PK_U16_U32 |

664 (0x298) | V_CVT_PK_I16_I32 |

### Instruction set

Alphabetically sorted instruction list:

#### V_ADD_F64

Opcode: 356 (0x164) for GCN 1.0/1.1; 640 (0x280) for GCN 1.2

Syntax: V_ADD_F64 VDST(2), SRC0(2), SRC1(2)

Description: Add two double FP value from SRC0 and SRC1 and store result to VDST.

Operation:

`VDST = ASDOUBLE(SRC0) + ASDOUBLE(SRC1)`

#### V_ALIGNBIT_B32

Opcode: 334 (0x14e) for GCN 1.0/1.1; 462 (0x1ce) for GCN 1.2

Syntax: V_ALIGNBIT_B32 VDST, SRC0, SRC1, SRC2

Description: Align bit. Shift right bits in 64-bit stored in SRC1 (low part) and
SRC0 (high part) by SRC2&31 bits, and store low 32-bit of the result in VDST.

Operation:

`VDST = (((UINT64)SRC0)<<32) | SRC1) >> (SRC2&31)`

#### V_ALIGNBYTE_B32

Opcode: 335 (0x14f) for GCN 1.0/1.1; 463 (0x1cf) for GCN 1.2

Syntax: V_ALIGNBYTE_B32 VDST, SRC0, SRC1, SRC2

Description: Align bit. Shift right bits in 64-bit stored in SRC1 (low part) and
SRC0 (high part) by (SRC2&3)*8 bits, and store low 32-bit of the result in VDST.

Operation:

`VDST = (((UINT64)SRC0)<<32) | SRC1) >> ((SRC2&3)*8)`

#### V_ASHR_I64

Opcode: 355 (0x163) for GCN 1.0/1.1

Syntax: V_ASHR_I32 VDST(2), SRC0(2), SRC1

Description: Arithmetic shift right SRC0 by (SRC1&63) bits and store result into VDST.

Operation:

`VDST = (INT64)SRC0 >> (SRC1&63)`

#### V_ASHRREV_I64

Opcode: 657 (0x291) for GCN 1.2

Syntax: V_ASHRREV_I32 VDST(2), SRC0, SRC1(2)

Description: Arithmetic shift right SRC1 by (SRC0&63) bits and store result into VDST.

Operation:

`VDST = (INT64)SRC0 >> (SRC0&63)`

#### V_BCNT_U32_B32

Opcode: 651 (0x28b) for GCN 1.2

Syntax: V_BCNT_U32_B32 VDST, SRC0, SRC1

Description: Count bits in SRC0, adds SRC1, and store result to VDST.

Operation:

`VDST = SRC1 + BITCOUNT(SRC0)`

#### V_BFE_I32

Opcode: 329 (0x149) for GCN 1.0/1.1; 457 (0x1c9) for GCN 1.2

Syntax: V_BFE_I32 VDST, SRC0, SRC1, SRC2

Description: Extracts bits in SRC0 from range (SRC1&31) with length (SRC2&31)
and extend sign from last bit of extracted value, and store result to VDST.

Operation:

```
UINT8 shift = SRC1 & 31
UINT8 length = SRC2 & 31
if (length==0)
VDST = 0
if (shift+length < 32)
VDST = (INT32)(SRC0 << (32 - shift - length)) >> (32 - length)
else
VDST = (INT32)SRC0 >> shift
```

#### V_BFE_U32

Opcode: 328 (0x148) for GCN 1.0/1.1; 456 (0x1c8) for GCN 1.2

Syntax: V_BFE_U32 VDST, SRC0, SRC1, SRC2

Description: Extracts bits in SRC0 from range SRC1&31 with length SRC2&31, and
store result to VDST.

Operation:

```
UINT8 shift = SRC1 & 31
UINT8 length = SRC2 & 31
if (length==0)
VDST = 0
if (shift+length < 32)
VDST = SRC0 << (32 - shift - length) >> (32 - length)
else
VDST = SRC0 >> shift
```

#### V_BFI_B32

Opcode: 330 (0x14a) for GCN 1.0/1.1; 458 (0x1ca) for GCN 1.2

Syntax: V_BFI_B32 VDST, SRC0, SRC1, SRC2

Description: Replace bits in SRC2 by bits from SRC1 marked by bits in SRC0, and store result
to VDST.

Operation:

`VDST = (SRC0 & SRC1) | (~SRC0 & SRC2)`

#### V_BFM_B32

Opcode: 659 (0x293) for GCN 1.2

Syntax: V_BFM_B32 VDST, SRC0, SRC1

Description: Make 32-bit bitmask from (SRC1 & 31) bit that have length (SRC0 & 31) and
store it to VDST.

Operation:

`VDST = ((1U << (SRC0&31))-1) << (SRC1&31)`

#### V_CUBEID_F32

Opcode: 324 (0x144) for GCN 1.0/1.1; 452 (0x1c4) for GCN 1.2

Syntax: V_CUBEID_F32 VDST, SRC0, SRC1, SRC2

Description: Cubemap face identification. Determine face by comparing three single FP
values: SRC0 (X), SRC1 (Y), SRC2(Z). Choose highest absolute value and check whether is
negative or positive. Store floating point value of face ID: (DIM*2.0)+(V[DIM]>=0?1:0),
where DIM is number of choosen dimension (X - 0, Y - 1, Z - 2);
V - vector = [SRC0, SRC1, SRC2].

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
FLOAT OUT
if (ABS(SF2) >= ABS(SF1) && ABS(SF2) >= ABS(SF0))
OUT = (SF2 >= 0.0) ? 4 : 5
else if (ABS(SF1) >= ABS(SF0)
OUT = (SF1 >= 0.0) ? 2 : 3
else
OUT = (SF0 >= 0.0) ? 0 : 1
VDST = OUT
```

#### V_CUBEMA_F32

Opcode: 327 (0x147) for GCN 1.0/1.1; 455 (0x1c7) for GCN 1.2

Syntax: V_CUBEMA_F32 VDST, SRC0, SRC1, SRC2

Description: Cubemap Major Axis. Choose highest absolute value from all three FP values
(SRC0, SRC1, SRC2) and multiply choosen FP value by two. Result is stored in VDST.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ABS(SF2) >= ABS(SF1) && ABS(SF2) >= ABS(SF0))
OUT = 2*SF2
else if (ABS(SF1) >= ABS(SF0)
OUT = 2*SF1
else
OUT = 2*SF0
VDST = OUT
```

#### V_CUBESC_F32

Opcode: 325 (0x145) for GCN 1.0/1.1; 453 (0x1c5) for GCN 1.2

Syntax: V_CUBESC_F32 VDST, SRC0, SRC1, SRC2

Description: Cubemap S coordination. Algorithm below.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ABS(SF2) >= ABS(SF1) && ABS(SF2) >= ABS(SF0))
OUT = SIGN((SF2) * SF0
else if (ABS(SF1) >= ABS(SF0)
OUT = SF0
else
OUT = -SIGN((SF0) * SF2
VDST = OUT
```

#### V_CUBETC_F32

Opcode: 326 (0x146) for GCN 1.0/1.1; 454 (0x1c6) for GCN 1.2

Syntax: V_CUBETC_F32 VDST, SRC0, SRC1, SRC2

Description: Cubemap T coordination. Algorithm below.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ABS(SF2) >= ABS(SF1) && ABS(SF2) >= ABS(SF0))
OUT = -SF1
else if (ABS(SF1) >= ABS(SF0)
OUT = SIGN(SF1) * SF2
else
OUT = -SF1
VDST = OUT
```

#### V_CVT_PK_I16_I32

Opcode: 664 (0x298) for GCN 1.2

Syntax: V_CVT_PK_I16_I32 VDST, SRC0, SRC1

Description: Convert signed value from SRC0 and SRC1 to signed 16-bit values with
clamping, and store first value to low 16-bit and second to high 16-bit of the VDST.

Operation:

```
INT16 D0 = MAX(MIN((INT32)SRC0, 0x7fff), -0x8000)
INT16 D1 = MAX(MIN((INT32)SRC1, 0x7fff), -0x8000)
VDST = D0 | (((UINT32)D1) << 16)
```

#### V_CVT_PK_U16_U32

Opcode: 663 (0x297) for GCN 1.2

Syntax: V_CVT_PK_U16_U32 VDST, SRC0, SRC1

Description: Convert unsigned value from SRC0 and SRC1 to unsigned 16-bit values with
clamping, and store first value to low 16-bit and second to high 16-bit of the VDST.

Operation:

```
UINT16 D0 = MIN(SRC0, 0xffff)
UINT16 D1 = MIN(SRC1, 0xffff)
VDST = D0 | (((UINT32)D1) << 16)
```

#### V_CVT_PK_U8_F32

Opcode: 350 (0x15e) for GCN 1.0/1.1; 477 (0x1dd) for GCN 1.2

Syntax: V_CVT_PK_U8_F32 VDST, SRC0, SRC1, SRC2

Description: Convert floating point value from SRC0 to unsigned byte value with
rounding mode from MODE register, and store this byte to (SRC1&3)'th byte with
other bytes of SRC2 of VDST.

Operation:

```
UINT8 shift = ((SRC1&3) * 8)
UINT32 mask = 0xff << shift
FLOAT f = RNDINT(ASFLOAT(SRC0))
UINT8 VAL8 = 0
if (ISNAN(f))
VAL8 = (UINT8)MAX(MIN(f, 255.0), 0.0)
VDST = (SRC2&~mask) | (((UINT32)VAL8) << shift)
```

#### V_CVT_PKACCUM_U8_F32

Opcode: 496 (0x1f0) for GCN 1.2

Syntax: V_CVT_PKACCUM_U8_F32 VDST, SRC0, SRC1

Description: Convert floating point value from SRC0 to unsigned byte value with
rounding mode from MODE register, and store this byte to (SRC1&3)'th byte of VDST.

Operation:

```
UINT8 shift = ((SRC1&3) * 8)
UINT32 mask = 0xff << shift
FLOAT f = RNDINT(ASFLOAT(SRC0))
UINT8 VAL8 = 0
if (ISNAN(f))
VAL8 = (UINT8)MAX(MIN(f, 255.0), 0.0)
VDST = (VDST&~mask) | (((UINT32)VAL8) << shift)
```

#### V_CVT_PKNORM_I16_F32

Opcode: 660 (0x294) for GCN 1.2

Syntax: V_CVT_PKNORM_I16_F32 VDST, SRC0, SRC1

Description: Convert normalized FP value from SRC0 and SRC1 to signed 16-bit integers with
rounding to nearest to even (??), and store first value to low 16-bit and
second to high 16-bit of the VDST.

Operation:

```
INT16 roundNorm(FLOAT S)
{
FLOAT f = RNDNEINT(S*32767)
if (ISNAN(f))
return 0
return (INT16)MAX(MIN(f, 32767.0), -32767.0)
}
VDST = roundNorm(ASFLOAT(SRC0)) | ((UINT32)roundNorm(ASFLOAT(SRC1)) << 16)
```

#### V_CVT_PKNORM_U16_F32

Opcode: 661 (0x295) for GCN 1.2

Syntax: V_CVT_PKNORM_U16_F32 VDST, SRC0, SRC1

Description: Convert normalized FP value from SRC0 and SRC1 to unsigned 16-bit integers with
rounding to nearest to even (??), and store first value to low 16-bit and
second to high 16-bit of the VDST.

Operation:

```
UINT16 roundNorm(FLOAT S)
{
FLOAT f = RNDNEINT(S*65535.0)
if (ISNAN(f))
return 0
return (INT16)MAX(MIN(f, 65535.0), 0.0)
}
VDST = roundNorm(ASFLOAT(SRC0)) | ((UINT32)roundNorm(ASFLOAT(SRC1)) << 16)
```

#### V_CVT_PKRTZ_F16_F32

Opcode: 662 (0x296) for GCN 1.2

Syntax: V_CVT_PKRTZ_F16_F32 VDST, SRC0, SRC1

Description: Convert normalized FP value from SRC0 and SRC1 to half floating points with
rounding to zero, and store first value to low 16-bit and
second to high 16-bit of the VDST.

Operation:

```
UINT16 D0 = ASINT16(CVT_HALF_RTZ(ASFLOAT(SRC0)))
UINT16 D1 = ASINT16(CVT_HALF_RTZ(ASFLOAT(SRC1)))
VDST = D0 | (((UINT32)D1) << 16)
```

#### V_DIV_FIXUP_F16

Opcode: 495 (0x1ef) for GCN 1.2

Syntax: V_DIV_FIXUP_F16 VDST, SRC0, SRC1, SRC2

Description: Handle all exceptions requires for half floating point division.
SRC0 is quotient, SRC1 is denominator, SRC2 is nominator. Correct result stored to VDST.

Operation:

```
HALF SF0 = ASHALF(SRC0)
HALF SF1 = ASHALF(SRC1)
HALF SF2 = ASHALF(SRC2)
if (ISNAN(SF1) && !ISNAN(SF2))
VDST = QUIETNAN(SF1)
else if (ISNAN(SF2))
VDST = QUIETNAN(SF2)
else if (SF1 == 0.0 && SF2 == 0.0)
VDST = NAN_H
else if (ABS(SF1)==INF && ABS(SF2)==INF)
VDST = -NAN_H
else if (SF1 == 0.0)
VDST = INF_H*SIGN(SF1)*SIGN(SF2)
else if (ABS(SF1) == INF)
VDST = SIGN(SF1)*SIGN(SF2) >=0 ? 0.0 : -0.0
else if (ISNAN(SF0))
VDST = SIGN(SF1)*SIGN(SF2)*INF_H
else
VDST = SF0
```

#### V_DIV_FIXUP_F32

Opcode: 351 (0x15f) for GCN 1.0/1.1; 478 (0x1de) for GCN 1.2

Syntax: V_DIV_FIXUP_F32 VDST, SRC0, SRC1, SRC2

Description: Handle all exceptions requires for single floating point division.
SRC0 is quotient, SRC1 is denominator, SRC2 is nominator. Correct result stored to VDST.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ISNAN(SF1) && !ISNAN(SF2))
VDST = QUIETNAN(SF1)
else if (ISNAN(SF2))
VDST = QUIETNAN(SF2)
else if (SF1 == 0.0 && SF2 == 0.0)
VDST = NAN
else if (ABS(SF1)==INF && ABS(SF2)==INF)
VDST = -NAN
else if (SF1 == 0.0)
VDST = INF*SIGN(SF1)*SIGN(SF2)
else if (ABS(SF1) == INF)
VDST = SIGN(SF1)*SIGN(SF2) >=0 ? 0.0 : -0.0
else if (ISNAN(SF0))
VDST = SIGN(SF1)*SIGN(SF2)*INF
else
VDST = SF0
```

#### V_DIV_FIXUP_F64

Opcode: 352 (0x160) for GCN 1.0/1.1; 479 (0x1df) for GCN 1.2

Syntax: V_DIV_FIXUP_F64 VDST(2), SRC0(2), SRC1(2), SRC2(2)

Description: Handle all exceptions requires for double floating point division.
SRC0 is quotient, SRC1 is denominator, SRC2 is nominator. Correct result stored to VDST.

Operation:

```
DOUBLE SF0 = ASDOUBLE(SRC0)
DOUBLE SF1 = ASDOUBLE(SRC1)
DOUBLE SF2 = ASDOUBLE(SRC2)
if (ISNAN(SF1) && !ISNAN(SF2))
VDST = QUIETNAN(SF1)
else if (ISNAN(SF2))
VDST = QUIETNAN(SF2)
else if (SF1 == 0.0 && SF2 == 0.0)
VDST = NAN
else if (ABS(SF1)==INF && ABS(SF2)==INF)
VDST = -NAN
else if (SF1 == 0.0)
VDST = INF*SIGN(SF1)*SIGN(SF2)
else if (ABS(SF1) == INF)
VDST = SIGN(SF1)*SIGN(SF2) >=0 ? 0.0 : -0.0
else if (ISNAN(SF0))
VDST = SIGN(SF1)*SIGN(SF2)*INF
else
VDST = SF0
```

#### V_DIV_FMAS_F32

Opcode: 367 (0x16f) for GCN 1.0/1.1; 482 (0x1e2) for GCN 1.2

Syntax: V_DIV_FMAS_F32 VDST, SRC0, SRC1, SRC2

Description: Special case divide FMA with scale and flags.
SRC0 is quotient, SRC1 is denominator, SRC2 is nominator.
All input values are floating point values. Instruction does fussed multiply and addition,
multiply result by POW(2.0, -64) if absolute value of the SRC2 less than 2.0,
otherwise multiply by POW(2.0, 64); and store result to VDST.

Operation:

```
// SRC0*SRC1+SRC2
VDST = FMA(ASFLOAT(SRC0), ASFLOAT(SRC1), ASFLOAT(SRC2))
if (ABS(ASFLOAT(SRC2)) >= 2.0)
VDST = ASFLOAT(VDST)*POW(2.0,64)
else
VDST = ASFLOAT(VDST)*POW(-2.0,64)
```

#### V_DIV_FMAS_F64

Opcode: 368 (0x170) for GCN 1.0/1.1; 483 (0x1e3) for GCN 1.2

Syntax: V_DIV_FMAS_F64 VDST(2), SRC0(2), SRC1(2), SRC2(2)

Description: Special case divide FMA with scale and flags.
SRC0 is quotient, SRC1 is denominator, SRC2 is nominator.
All input values are double floating point values.
Instruction does fussed multiply and addition,
multiply result by POW(2.0, -128) if absolute value of the SRC2 less than 2.0,
otherwise multiply by POW(2.0, 128); and store result to VDST.

Operation:

```
// SRC0*SRC1+SRC2
VDST = FMA(ASDOUBLE(SRC0), ASDOUBLE(SRC1), ASDOUBLE(SRC2))
if (ABS(ASDOUBLE(SRC2)) >= 2.0)
VDST = ASDOUBLE(VDST)*POW(2.0,128)
else
VDST = ASDOUBLE(VDST)*POW(-2.0,128)
```

#### V_DIV_SCALE_F32

Opcode (VOP3B): 365 (0x16d) for GCN 1.0/1.1; 480 (0x1e0) for GCN 1.2

Syntax: V_DIV_SCALE_F32 VDST, SDST(2), SRC0, SRC1, SRC2

Description: Special case divide preop and flags. SRC0 is quotient, SRC1 is denominator,
SRC2 is nominator. All input values are floating point values. SRC0 must be equal SRC1
or SRC2 (register can be different, only values must be equal). If absolute value of
the input different than SRC0 is greater or equal than T2=POW(2.0, 96+EXP0)
(EXP0 is exponent part (base 2) of SRC0) or this value is NaN,
then instruction multiply SRC0 by POW(2.0, 64),
and store that value to VDST, and set flag in bit for current lane in SDST.
If SRC0 is NaN or infinity then store SRC0 to VDST and set flag.
Otherwise store SRC0 to VDST and clear flag.
Bits for inactive threads in SDST are always zeroed.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
FLOAT S12 = (SRC0!=SRC1) ? SF1 : SF2
SDST = 0
if (ISNAN(SF0) || ABS(SF0) == INF)
{
VDST = SRC0
SDST = (SDST & ~MASK) | MASK
}
else if (ABS(S12) >= ABS(POW(2.0, 96+FREXP_EXP(SF0)-1) || ISNAN(S12))
{
VDST = SF0 * POW2(2.0, 64)
UINT64 MASK = (1ULL<<LANEID)
SDST = (SDST & ~MASK) | MASK
}
else
{
VDST = SRC0
SDST = (SDST & ~MASK)
}
```

#### V_DIV_SCALE_F64

Opcode (VOP3B): 366 (0x16e) for GCN 1.0/1.1; 481 (0x1e1) for GCN 1.2

Syntax: V_DIV_SCALE_F64 VDST(2), SDST(2), SRC0(2), SRC1(2), SRC2(2)

Description: Special case divide preop and flags. SRC0 is quotient, SRC1 is denominator,
SRC2 is nominator. All input values are double floating point values.
SRC0 must be equal SRC1 or SRC2 (register can be different, only values must be equal).
If absolute value of the input different than SRC0 is greater or equal than
T2=POW(2.0, 768+EXP0) (EXP0 is exponent part (base 2) of SRC0) or this value is NaN,
then instruction multiply SRC0 by POW(2.0, 128),
and store that value to VDST, and set flag in bit for current lane in SDST.
If SRC0 is NaN or infinity then store SRC0 to VDST and set flag.
Otherwise store SRC0 to VDST and clear flag.
Bits for inactive threads in SDST are always zeroed.

Operation:

```
DOUBLE SD0 = ASDOUBLE(SRC0)
DOUBLE SD1 = ASDOUBLE(SRC1)
DOUBLE SD2 = ASDOUBLE(SRC2)
DOUBLE S12 = (SRC0!=SRC1) ? SD1 : SD2
UINT64 MASK = (1ULL<<LANEID)
SDST = 0
if (ISNAN(SD0) || ABS(SD0) == INF)
{
VDST = SRC0
SDST = (SDST & ~MASK) | MASK
}
else if (ABS(S12) >= ABS(POW(2.0, 768+FREXP_EXP(SD0)-1) || ISNAN(S12))
{
VDST = SD0 * POW2(2.0, 128)
SDST = (SDST & ~MASK) | MASK
}
else
{
VDST = SRC0
SDST = (SDST & ~MASK)
}
```

#### V_FMA_F16

Opcode: 494 (0x1ee) for GCN 1.2

Syntax: V_FMA_F16 VDST, SRC0, SRC1, SRC2

Description: Fused multiply addition on half floating point values from
SRC0, SRC1 and SRC2. Result stored in VDST.

Operation:

```
// SRC0*SRC1+SRC2
VDST = FMA(ASHALF(SRC0), ASHALF(SRC1), ASHALF(SRC2))
```

#### V_FMA_F32

Opcode: 331 (0x14b) for GCN 1.0/1.1; 459 (0x1cb) for GCN 1.2

Syntax: V_FMA_F32 VDST, SRC0, SRC1, SRC2

Description: Fused multiply addition on single floating point values from
SRC0, SRC1 and SRC2. Result stored in VDST.

Operation:

```
// SRC0*SRC1+SRC2
VDST = FMA(ASFLOAT(SRC0), ASFLOAT(SRC1), ASFLOAT(SRC2))
```

#### V_FMA_F64

Opcode: 332 (0x14c) for GCN 1.0/1.1; 460 (0x1cc) for GCN 1.2

Syntax: V_FMA_F64 VDST(2), SRC0(2), SRC1(2), SRC2(2)

Description: Fused multiply addition on double floating point values from
SRC0, SRC1 and SRC2. Result stored in VDST.

Operation:

```
// SRC0*SRC1+SRC2
VDST = FMA(ASDOUBLE(SRC0), ASDOUBLE(SRC1), ASDOUBLE(SRC2))
```

#### V_LDEXP_F32

Opcode: 648 (0x288) for GCN 1.2

Syntax: V_LDEXP_F32 VDST, SRC0, SRC1

Description: Do ldexp operation on SRC0 and SRC1 (multiply SRC0 by 2**(SRC1)).
SRC1 is signed integer, SRC0 is floating point value.

Operation:

`VDST = ASFLOAT(SRC0) * POW(2.0, (INT32)SRC1)`

#### V_LDEXP_F64

Opcode: 360 (0x168) for GCN 1.0/1.1; 644 (0x284) for GCN 1.2

Syntax: V_LDEXP_F64 VDST(2), SRC0(2), SRC1

Description: Do ldexp operation on SRC0 and SRC1 (multiply SRC0 by 2**(SRC1)).
SRC1 is signed integer, SRC0 is double floating point value.

Operation:

`VDST = ASDOUBLE(SRC0) * POW(2.0, (INT32)SRC1)`

#### V_LERP_U8

Opcode: 333 (0x14d) for GCN 1.0/1.1; 461 (0x1cd) for GCN 1.2

Syntax: V_LERP_U8 VDST, SRC0, SRC1, SRC2

Description: For each byte of dword, calculate average from SRC0 byte and SRC1 byte with
rounding mode defined in first of the byte SRC2. If rounding bit is set then result for
that byte is rounded, otherwise truncated. All bytes will be stored in VDST.

Operation:

```
for (UINT8 i = 0; i < 4; i++)
{
UINT8 S0 = (SRC0 >> (i*8)) & 0xff
UINT8 S1 = (SRC1 >> (i*8)) & 0xff
UINT8 S2 = (SRC2 >> (i*8)) & 1
VDST = (VDST & ~(255U<<(i*8))) | (((S0+S1+S2) >> 1) << (i*8))
}
```

#### V_LSHL_B64

Opcode: 353 (0x161) for GCN 1.0/1.1

Syntax: V_LSHL_B64 VDST(2), SRC0(2), SRC1

Description: Shift left SRC0 by (SRC1&63) bits and store result into VDST.

Operation:

`VDST = SRC0 << (SRC1&63)`

#### V_LSHLREV_B64

Opcode: 655 (0x28f) for GCN 1.2

Syntax: V_LSHLREV_B64 VDST(2), SRC0, SRC1(2)

Description: Shift left SRC1 by (SRC0&63) bits and store result into VDST.

Operation:

`VDST = SRC1 << (SRC0&63)`

#### V_LSHR_B64

Opcode: 354 (0x162) for GCN 1.0/1.1

Syntax: V_LSHR_B64 VDST(2), SRC0(2), SRC1

Description: Shift right SRC0 by (SRC1&63) bits and store result into VDST.

Operation:

`VDST = SRC0 >> (SRC1&63)`

#### V_LSHRREV_B64

Opcode: 656 (0x290) for GCN 1.2

Syntax: V_LSHRREV_B64 VDST(2), SRC0, SRC1(2)

Description: Shift right SRC1 by (SRC0&63) bits and store result into VDST.

Operation:

`VDST = SRC1 >> (SRC0&63)`

#### V_MAC_LEGACY_F32

Opcode: 654 (0x28e) for GCN 1.2

Syntax: V_MAC_LEGACY_F32 VDST, SRC0, SRC1

Description: Multiply FP value from SRC0 by FP value from SRC1 and add result to VDST.
If one of value is 0.0 then always do not change VDST (do not apply IEEE rules for 0.0*x).

Operation:

```
if (ASFLOAT(SRC0)!=0.0 && ASFLOAT(SRC1)!=0.0)
VDST = ASFLOAT(SRC0) * ASFLOAT(SRC1) + ASFLOAT(VDST)
```

#### V_MAD_F16

Opcode: 490 (0x1ea) for GCN 1.2

Syntax: V_MAD_F16 VDST, SRC0, SRC1, SRC2

Description: Multiply half FP value from SRC0 by half FP value from
SRC1 and add SRC2, and store result to VDST.
It applies OMOD modifier to result and it flush denormals.

Operation:

`VDST = ASHALF(SRC0) * ASHALF(SRC1) + ASHALF(SRC2)`

#### V_MAD_F32

Opcode: 321 (0x141) for GCN 1.0/1.1; 449 (0x1c1) for GCN 1.2

Syntax: V_MAD_F32 VDST, SRC0, SRC1, SRC2

Description: Multiply FP value from SRC0 by FP value from SRC1 and add SRC2, and store
result to VDST. It applies OMOD modifier to result and it flush denormals.

Operation:

`VDST = ASFLOAT(SRC0) * ASFLOAT(SRC1) + ASFLOAT(SRC2)`

#### V_MAD_I16

Opcode: 492 (0x1ec) for GCN 1.2

Syntax: V_MAD_I16 VDST, SRC0, SRC1, SRC2

Description: Multiply 16-bit signed value from SRC0 by 16-bit signed value from
SRC1 and add 16-bit signed value from SRC2, and store 16-bit signed result to VDST.

Operation:

`VDST = (INT16)((INT16)SRC0*(INT16)SRC1 + (INT16)SRC2)`

#### V_MAD_I32_I24

Opcode: 322 (0x142) for GCN 1.0/1.1; 450 (0x1c2) for GCN 1.2

Syntax: V_MAD_I32_I24 VDST, SRC0, SRC1, SRC2

Description: Multiply 24-bit signed integer value from SRC0 by 24-bit signed value from
SRC1, add SRC2 to this product, and and store result to VDST.

Operation:

```
INT32 V0 = (INT32)((SRC0&0x7fffff) | (SSRC0&0x800000 ? 0xff800000 : 0))
INT32 V1 = (INT32)((SRC1&0x7fffff) | (SSRC1&0x800000 ? 0xff800000 : 0))
VDST = V0 * V1 + SRC2
```

#### V_MAD_I64_I32

Opcode (VOP3B): 375 (0x177) for GCN 1.1; 489 (0x1e9) for GCN 1.2

Syntax: V_MAD_I64_I32 VDST(2), SDST(2), SRC0, SRC1, SRC2(2)

Description: Multiply 32-bit signed integer value from SRC0 by 32-bit signed value
from SRC1 and add 64-bit unsigned value to this result, and store final result into
VDST and store some value of bits to SDST (unknown behavior).

Operation:

```
INT64 PROD = (INT64)SRC0*(INT32)SRC1
VDST = SRC2 + PROD
SDST = 0
UINT64 mask = (1ULL<<LANEID)
//SDST = (SDST&~mask) | ((?????) ? mask : 0)
```

#### V_MAD_LEGACY_F32

Opcode: 320 (0x140) for GCN 1.0/1.1; 448 (0x1c0) for GCN 1.2

Syntax: V_MAD_LEGACY_F32 VDST, SRC0, SRC1, SRC2

Description: Multiply FP value from SRC0 by FP value from SRC1 and add result to SRC2, and
store result to VDST. If one of value is 0.0 then always store SRC2 to VDST
(do not apply IEEE rules for 0.0*x). It applies OMOD modifier to result and it flush
denormals.

Operation:

```
if (ASFLOAT(SRC0)!=0.0 && ASFLOAT(SRC1)!=0.0)
VDST = ASFLOAT(SRC0) * ASFLOAT(SRC1) + ASFLOAT(SRC2)
```

#### V_MAD_U16

Opcode: 491 (0x1eb) for GCN 1.2

Syntax: V_MAD_U16 VDST, SRC0, SRC1, SRC2

Description: Multiply 16-bit unsigned value from SRC0 by 16-bit unsigned value from
SRC1 and add 16-bit unsigned value from SRC2, and store 16-bit unsigned result to VDST.

Operation:

`VDST = ((UINT16)SRC0*(UINT16)SRC1 + (UINT16)SRC2) & 0xffff`

#### V_MAD_U32_U24

Opcode: 323 (0x143) for GCN 1.0/1.1; 451 (0x1c3) for GCN 1.2

Syntax: V_MAD_U32_U24 VDST, SRC0, SRC1, SRC2

Description: Multiply 24-bit unsigned integer value from SRC0 by 24-bit unsigned value
from SRC1, add SRC2 to this product and store result to VDST.

Operation:

`VDST = (UINT32)(SRC0&0xffffff) * (UINT32)(SRC1&0xffffff) + SRC2`

#### V_MAD_U64_U32

Opcode (VOP3B): 374 (0x176) for GCN 1.1; 488 (0x1e8) for GCN 1.2

Syntax: V_MAD_U64_U32 VDST(2), SDST(2), SRC0, SRC1, SRC2(2)

Description: Multiply 32-bit unsigned integer value from SRC0 by 32-bit unsigned value
from SRC1 and add 64-bit unsigned value to this result, and store final result into
VDST and store carry bits to SDST.

Operation:

```
UINT64 PROD = (UINT64)SRC0*SRC1
VDST = SRC2 + PROD
SDST = 0
UINT64 mask = (1ULL<<LANEID)
SDST = (SDST&~mask) | ((VDST < PROD) ? mask : 0)
```

#### V_MAX_F64

Opcode: 359 (0x167) for GCN 1.0/1.1; 643 (0x283) for GCN 1.2

Syntax: V_MAX_F64 VDST(2), SRC0(2), SRC1(2)

Description: Choose largest double FP value from SRC0 and SRC1, and store result to VDST.

Operation:

`VDST = MAX((ASDOUBLE(SRC0), ASDOUBLE(SRC1))`

#### V_MAX3_F32

Opcode: 340 (0x154) for GCN 1.0/1.1; 467 (0x1d3) for GCN 1.2

Syntax: V_MAX3_F32 VDST, SRC0, SRC1, SRC2

Description: Choose largest value from FP values SRC0, SRC1, SRC2, and store it to VDST.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ISNAN(SF0))
VDST = MAX(SF1, SF2)
else if (ISNAN(SF1))
VDST = MAX(SF0, SF2)
else if (ISNAN(SF2))
VDST = MAX(SF0, SF1)
else if (SF2 > SF0 && SF2 > SF1)
VDST = SF2
else
VDST = MAX(SF1, SF0)
```

#### V_MAX3_I32

Opcode: 341 (0x155) for GCN 1.0/1.1; 468 (0x1d4) for GCN 1.2

Syntax: V_MAX3_I32 VDST, SRC0, SRC1, SRC2

Description: Choose largest value from signed integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
if ((INT32)SRC2 > (INT32)SRC0 && (INT32)SRC2 > (INT32)SRC1)
VDST = SRC2
else
VDST = MAX((INT32)SRC1, (INT32)SRC0)
```

#### V_MAX3_U32

Opcode: 342 (0x156) for GCN 1.0/1.1; 469 (0x1d5) for GCN 1.2

Syntax: V_MAX3_U32 VDST, SRC0, SRC1, SRC2

Description: Choose largest value from unsigned integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
if (SRC2 > SRC0 && SRC2 > SRC1)
VDST = SRC2
else
VDST = MAX(SRC1, SRC0)
```

#### V_MBCNT_HI_U32_B32

Opcode: 653 (0x28d) for GCN 1.2

Syntax: V_MBCNT_HI_U32_B32 VDST, SRC0, SRC1

Description: Make mask for all lanes ending at current lane,
get from that mask higher 32-bits, use it to mask SSRC0,
count bits in that value, and store result to VDST.

Operation:

```
UINT32 MASK = ((1ULL << (LANEID-32)) - 1ULL) & SRC0
VDST = SRC1 + BITCOUNT(MASK)
```

#### V_MBCNT_LO_U32_B32

Opcode: 652 (0x28c) for GCN 1.2

Syntax: V_MBCNT_LO_U32_B32 VDST, SRC0, SRC1

Description: Make mask for all lanes ending at current lane,
get from that mask lower 32-bits, use it to mask SSRC0,
count bits in that value, and store result to VDST.

Operation:

```
UINT32 MASK = ((1ULL << LANEID) - 1ULL) & SRC0
VDST = SRC1 + BITCOUNT(MASK)
```

#### V_MED3_F32

Opcode: 343 (0x157) for GCN 1.0/1.1; 470 (0x1d6) for GCN 1.2

Syntax: V_MED3_F32 VDST, SRC0, SRC1, SRC2

Description: Choose medium value from FP values SRC0, SRC1, SRC2, and store it to VDST.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ISNAN(SF0))
VDST = MIN(SF1, SF2)
else if (ISNAN(SF1))
VDST = MIN(SF0, SF2)
else if (ISNAN(SF2))
VDST = MIN(SF0, SF1)
else if ((SF2 > SF1 && SF2 < SF0) || (SF2 < SF1 && SF2 > SF0))
VDST = SF2
else if ((SF1 > SF2 && SF1 < SF0) || (SF1 < SF2 && SF1 > SF0))
VDST = SF1
else
VDST = SF0
```

#### V_MED3_I32

Opcode: 344 (0x158) for GCN 1.0/1.1; 471 (0x1d7) for GCN 1.2

Syntax: V_MED3_I32 VDST, SRC0, SRC1, SRC2

Description: Choose medium value from signed integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
INT32 S0 = (INT32)SRC0
INT32 S1 = (INT32)SRC1
INT32 S2 = (INT32)SRC2
if ((S2 > S1 && S2 < S0) || (S2 < S1 && S2 > S0))
VDST = S2
else if ((S1 > S2 && S1 < S0) || (S1 < S2 && S1 > S0))
VDST = S1
else
VDST = S0
```

#### V_MED3_U32

Opcode: 345 (0x159) for GCN 1.0/1.1; 472 (0x1d8) for GCN 1.2

Syntax: V_MED3_U32 VDST, SRC0, SRC1, SRC2

Description: Choose medium value from unsigned integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
if ((SRC2 > SRC1 && SRC2 < SRC0) || (SRC2 < SRC1 && SRC2 > SRC0))
VDST = SRC2
else if ((SRC1 > SRC2 && SRC1 < SRC0) || (SRC1 < SRC2 && SRC1 > SRC0))
VDST = SRC1
else
VDST = SRC0
```

#### V_MIN_F64

Opcode: 358 (0x166) for GCN 1.0/1.1; 642 (0x282) for GCN 1.2

Syntax: V_MIN_F64 VDST(2), SRC0(2), SRC1(2)

Description: Choose smallest double FP value from SRC0 and SRC1, and store result to VDST.

Operation:

`VDST = MIN((ASDOUBLE(SRC0), ASDOUBLE(SRC1))`

#### V_MIN3_F32

Opcode: 337 (0x151) for GCN 1.0/1.1; 464 (0x1d0) for GCN 1.2

Syntax: V_MIN3_F32 VDST, SRC0, SRC1, SRC2

Description: Choose smallest value from FP values SRC0, SRC1, SRC2, and store it to VDST.

Operation:

```
FLOAT SF0 = ASFLOAT(SRC0)
FLOAT SF1 = ASFLOAT(SRC1)
FLOAT SF2 = ASFLOAT(SRC2)
if (ISNAN(SF0))
VDST = MIN(SF1, SF2)
else if (ISNAN(SF1))
VDST = MIN(SF0, SF2)
else if (ISNAN(SF2))
VDST = MIN(SF0, SF1)
else if (SF2 < SF0 && SF2 < SF1)
VDST = SF2
else
VDST = MIN(SF1, SF0)
```

#### V_MIN3_I32

Opcode: 338 (0x152) for GCN 1.0/1.1; 465 (0x1d1) for GCN 1.2

Syntax: V_MIN3_I32 VDST, SRC0, SRC1, SRC2

Description: Choose smallest value from signed integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
if ((INT32)SRC2 < (INT32)SRC0 && (INT32)SRC2 < (INT32)SRC1)
VDST = SRC2
else
VDST = MIN((INT32)SRC1, (INT32)SRC0)
```

#### V_MIN3_U32

Opcode: 339 (0x153) for GCN 1.0/1.1; 466 (0x1d2) for GCN 1.2

Syntax: V_MIN3_U32 VDST, SRC0, SRC1, SRC2

Description: Choose smallest value from unsigned integer values SRC0, SRC1, SRC2,
and store it to VDST.

Operation:

```
if (SRC2 < SRC0 && SRC2 < SRC1)
VDST = SRC2
else
VDST = MIN(SRC1, SRC0)
```

#### V_MQSAD_U32_U8

Opcode: 373 (0x175) for GCN 1.1; 487 (0x1e7) for GCN 1.2

Syntax: V_MQSAD_U32_U8 VDST(4), SRC0(2), SRC1, SRC2(4)

Description: Compute four masked sum of absolute differences with accumulation.
Any that operation get first argument from four bytes begins from N and ends to N+3
(where N is number of operation), second argument is SRC1, and third argument is
N'th 32-bit dword from SRC2.

Operation:

```
void MSADU8(UINT32 S0, UINT32 S1, UINT32 S2)
{
UINT64 OUT = S2;
for (UINT8 i = 0; i < 4; i++)
if ((S1 >> (i*8)) & 0xff) != 0)
OUT += ABS(((S0 >> (i*8)) & 0xff) - ((S1 >> (i*8)) & 0xff))
return (UINT32)MIN(OUT,0xffffffff);
}
VDST = (MSADU8((UINT32)SRC0, SRC1, SRC2)
VDST |= (MSADU8((UINT32)(SRC0>>8), SRC1, SRC2>>32)<<32
VDST |= (MSADU8((UINT32)(SRC0>>16), SRC1, SRC2>>64)<<64
VDST |= (MSADU8((UINT32)(SRC0>>24), SRC1, SRC2>>96)<<96
```

#### V_MQSAD_U8, V_MQSAD_PK_U16_U8

Opcode: 371 (0x173) for GCN 1.0/1.1; 486 (0x1e6) for GCN 1.2

Syntax (GCN 1.0): V_MQSAD_U8 VDST(2), SRC0(2), SRC1, SRC2(2)

Syntax (GCN 1.1/1.2): V_MQSAD_PK_U16_U8 VDST(2), SRC0(2), SRC1, SRC2(2)

Description: Compute four masked sum of absolute differences with accumulation.
Any that operation get first argument from four bytes begins from N and ends to N+3
(where N is number of operation), second argument is SRC1, and third argument is
N'th 16-bit dword from SRC2.

Operation:

```
void MSADU8(UINT32 S0, UINT32 S1, UINT32 S2)
{
UINT32 OUT = S2;
for (UINT8 i = 0; i < 4; i++)
if ((S1 >> (i*8)) & 0xff) != 0)
OUT += ABS(((S0 >> (i*8)) & 0xff) - ((S1 >> (i*8)) & 0xff))
return OUT;
}
VDST = (MSADU8((UINT32)SRC0, SRC1, SRC2 & 0xffff)
VDST |= (MSADU8((UINT32)(SRC0>>8), SRC1, (SRC2>>16) & 0xffff)<<16
VDST |= (MSADU8((UINT32)(SRC0>>16), SRC1, (SRC2>>32) & 0xffff)<<32
VDST |= (MSADU8((UINT32)(SRC0>>24), SRC1, (SRC2>>48) & 0xffff)<<48
```

#### V_MSAD_U8

Opcode: 369 (0x171) for GCN 1.0/1.1; 484 (0x1e4) for GCN 1.2

Syntax: V_MSAD_U8 VDST, SRC0, SRC1, SRC2

Description: Calculate sum of absolute differences in SRC0 and SRC1 for bytes that have
non-zero value in SRC1; add SRC2 to result, and store result to VDST.

Operation:

```
VDST = SRC2
for (UINT8 i = 0; i < 4; i++)
if ((SRC1 >> (i*8)) & 0xff) != 0)
VDST += ABS(((SRC0 >> (i*8)) & 0xff) - ((SRC1 >> (i*8)) & 0xff))
```

#### V_MUL_F64

Opcode: 357 (0x165) for GCN 1.0/1.1; 641 (0x281) for GCN 1.2

Syntax: V_MUL_F64 VDST(2), SRC0(2), SRC1(2)

Description: Multiply two double FP values from SRC0 and SRC1 and store result to VDST.

Operation:

`VDST = ASDOUBLE(SRC0) * ASDOUBLE(SRC1)`

#### V_MUL_HI_I32

Opcode: 364 (0x16c) for GCN 1.0/1.1; 647 (0x287) for GCN 1.2

Syntax: V_MUL_HI_I32 VDST, SRC0, SRC1

Description: Multiply 32-bit signed value SRC0 and SRC1, and store higher part of
the result to VDST.

Operation:

`VDST = ((INT64)SRC0 * (INT32)SRC1) >> 32`

#### V_MUL_HI_U32

Opcode: 362 (0x16a) for GCN 1.0/1.1; 646 (0x286) for GCN 1.2

Syntax: V_MUL_HI_U32 VDST, SRC0, SRC1

Description: Multiply 32-bit unsigned value SRC0 and SRC1, and store higher part of
the result to VDST.

Operation:

`VDST = ((UINT64)SRC0 * SRC1) >> 32`

#### V_MUL_LO_I32

Opcode: 363 (0x16b) for GCN 1.0/1.1
Syntax: V_MUL_LO_I32 VDST, SRC0, SRC1

Description: Multiply 32-bit signed value SRC0 and SRC1, and store lower part of
the result to VDST.

Operation:

`VDST = (INT32)SRC0 * (INT32)SRC1`

#### V_MUL_LO_U32

Opcode: 361 (0x169) for GCN 1.0/1.1; 645 (0x285) for GCN 1.2

Syntax: V_MUL_LO_U32 VDST, SRC0, SRC1

Description: Multiply 32-bit unsigned value SRC0 and SRC1, and store lower part of
the result to VDST.

Operation:

`VDST = SRC0 * SRC1`

#### V_MULLIT_F32

Opcode: 336 (0x150) for GCN 1.0/1.1

Syntax: V_MULLIT_F32 VDST, SRC0, SRC1, SRC2

Description: Multiply FP value SRC0 and FP value SRC1, and store it to VDST if FP value in
SRC2 is greater than zero, otherwise, store -MAX_FLOAT to VDST.
If one of value is 0.0 and previous condition is satisfied then always store
0.0 to VDST (do not apply IEEE rules for 0.0*x).

Operation:

```
VDST = -MAX_FLOAT
if (ASFLOAT(SRC2) > 0.0 && !ISNAN(ASFLOAT(SRC2)))
{
VDST = 0.0
if (ASFLOAT(SRC0)!=0.0 && ASFLOAT(SRC1)!=0.0)
VDST = ASFLOAT(SRC0) * ASFLOAT(SRC1)
}
```

#### V_PERM_B32

Opcode: 493 (0x1ed) for GCN 1.2

Syntax: V_PERM_B32 VDST, SRC0, SRC1, SRC2

Description: Permute bytes. Choose for every byte in dword, specified value. Bytes in
SRC2 dword selects value for result dword. Value 0-7 choose byte of this index of quadword
(64-bit value) built from SRC0 (higher bits) and SRC1 (lower bits). Value from 8-11
choose 0xff*BIT, where BIT is last bit from 2*N+1 from 64-bit value (SRC0,SRC1).
Value 12 choose zero. Value equal or greater than 13 choose 0xff.

Operation:

```
VDST = 0
UINT64 qword = (((UINT64)SRC0)<<32) | SRC1
for (int i = 0; i < 4; i++)
{
BYTE choice = (SRC2 >> (8*i)) & 0xff
BYTE result
if (choice >= 13)
result = 0xff
else if (choice == 12)
result = 0
else if (choice >= 8)
result = 0xff * qword>>((choice-8)*16 + 15)
else
result = (qword >> (choice*8)) & 0xff
VDST |= (result << (i*8))
}
```

#### V_QSAD_U8, V_QSAD_PK_U16_U8

Opcode: 370 (0x172) for GCN 1.0/1.1; 485 (0x1e5) for GCN 1.2

Syntax (GCN 1.0): V_QSAD_U8 VDST(2), SRC0(2), SRC1, SRC2(2)

Syntax (GCN 1.1/1.2): V_QSAD_PK_U16_U8 VDST(2), SRC0(2), SRC1, SRC2(2)

Description: Compute four sum of absolute differences with accumulation. Any that operation
get first argument from four bytes begins from N and ends to N+3 (where N is number of
operation), second argument is SRC1, and third argument is N'th 16-bit dword from SRC2.

Operation:

```
void SADU8(UINT32 S0, UINT32 S1, UINT32 S2)
{
UINT32 OUT = S2;
for (UINT8 i = 0; i < 4; i++)
OUT += ABS(((S0 >> (i*8)) & 0xff) - ((S1 >> (i*8)) & 0xff))
return OUT;
}
VDST = (SADU8((UINT32)SRC0, SRC1, SRC2 & 0xffff)
VDST |= (SADU8((UINT32)(SRC0>>8), SRC1, (SRC2>>16) & 0xffff)<<16
VDST |= (SADU8((UINT32)(SRC0>>16), SRC1, (SRC2>>32) & 0xffff)<<32
VDST |= (SADU8((UINT32)(SRC0>>24), SRC1, (SRC2>>48) & 0xffff)<<48
```

#### V_READLANE_B32

Opcode: 649 (0x289) for GCN 1.2

Syntax: V_READLANE_B32 SDST, VSRC0, SSRC1

Description: Copy one VSRC0 lane value to one SDST. Lane (thread id) choosen from SSRC1&63.
SSRC1 can be SGPR or M0. Ignores EXEC mask.

Operation:

`SDST = VSRC0[SSRC1 & 63]`

#### V_SAD_HI_U8

Opcode: 347 (0x15b) for GCN 1.0/1.1; 474 (0x1da) for GCN 1.2

Syntax: V_SAD_HI_U8 VDST, SRC0, SRC1, SRC2

Description: Calculate sum of absolute differences for all four bytes in SRC0 and SRC1,
shift result to high 16-bits, add SRC2 to result, and store result to VDST.

Operation:

```
VDST = SRC2
for (UINT8 i = 0; i < 4; i++)
VDST += (ABS(((SRC0 >> (i*8)) & 0xff) - ((SRC1 >> (i*8)) & 0xff)))<<16
```

#### V_SAD_U16

Opcode: 348 (0x15c) for GCN 1.0/1.1; 475 (0x1db) for GCN 1.2

Syntax: V_SAD_U16 VDST, SRC0, SRC1, SRC2

Description: Calculate sum of absolute differences for two 16-bit words in SRC0 and SRC1,
add SRC2 to result, and store result to VDST.

Operation:

```
VDST = SRC2
VDST += ABS((SRC0 & 0xffff) - (SRC1 & 0xffff))
VDST += ABS((SRC0 >> 16) - (SRC1 >> 16))
```

#### V_SAD_U32

Opcode: 349 (0x15d) for GCN 1.0/1.1; 476 (0x1dc) for GCN 1.2

Syntax: V_SAD_U32 VDST, SRC0, SRC1, SRC2

Description: Calculate sum of absolute difference for SRC0 and SRC1, add
SRC2 to result, and store result to VDST.

Operation:

`VDST = SRC2 + ABS(SRC0 - SRC1)`

#### V_SAD_U8

Opcode: 346 (0x15a) for GCN 1.0/1.1; 473 (0x1d9) for GCN 1.2

Syntax: V_SAD_U8 VDST, SRC0, SRC1, SRC2

Description: Calculate sum of absolute differences for all four bytes in SRC0 and SRC1, add
SRC2 to result, and store result to VDST.

Operation:

```
VDST = SRC2
for (UINT8 i = 0; i < 4; i++)
VDST += ABS(((SRC0 >> (i*8)) & 0xff) - ((SRC1 >> (i*8)) & 0xff))
```

#### V_TRIG_PREOP_F64

Opcode: 372 (0x174) for GCN 1.0/1.1; 658 (0x292) for GCN 1.2

Syntax: V_TRIG_PREOP_F64 VDST(2), SRC0(2), SRC1

Description: D.d = Look Up 2/PI (S0.d) with segment select S1.u[4:0].
Save choosen 53 bits of 2/PI in double floating point value in VDST. Second argument
is initial segment. First argument is shift of the value (in power form).
Bit are numbered from MSB to LSB, begins from value 1.0. Choosen bits begins from:
53*SEGMENT + (FREXP_EXP(SRC0)-1)-(53*SEGMENT if SRC0>=POW(2.0, 53*SEGMENT),
otherwise 53*SEGMENT.

Operation:

```
ASDOUBLE SD0 = ASDOUBLE(SRC0)
BIT = (SRC1&31) * 53
if (SD0 >= POW(2.0, 53)
{
if (ABS(SD0) != INF) && !ISNAN(SD0))
BIT += (FREXP_EXP(SD0)-1) - BIT
else
BIT += 1024 - BIT
}
VDST = (DOUBLE)(TWOPERPI[BIT:BIT+52]) * POW(2.0, -BIT-53)
```

#### V_WRITELANE_B32

Opcode: 650 (0x28a) for GCN 1.2

Syntax: V_WRITELANE_B32 VDST, VSRC0, SSRC1

Description: Copy SGPR to one lane of VDST. Lane choosen (thread id) from SSRC1&63.
SSRC1 can be SGPR or M0. Ignores EXEC mask.

Operation:

`VDST[SSRC1 & 63] = SSRC0`