SGX543

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Instruction set

General Info

It looks like instructions are 8 bytes long. Roughly speaking - first 4 bytes contain opcode and addressing mode. Second 4 bytes contain operands encoding.

Bit encoding used in this reference:

value meaning
0 bit clear
1 bit set
x dont care
? unknown
see reference

Predicates

Not sure about predicates yet, but they are used to mask execution of certain instructions.

Notation is the following: 

<predicate> <instruction>

For example: 

!p0 mad.f32

To reduce amount of examples - they are not listed with predicates.

It is assumed that all predicates are applicable to all instructions in the group unless opposite is indicated.

Operands

Different types of operands exist. They are described in further sections:

Instructions may have up to four operands specified.

In this documentation they will be encoded as: 

<op0> <op1> <op2> <op3>

Operand 0

Destination operand 0 can be encoded in different ways.

Usually the following fields are used to encode it:

  • alt_opt0 - alter opt0. this bit can be combined with opt0 to produce the following modes for op0:
alt_opt0 opt0 value details
1 0 0 sa
1 0 1 {} op0 encodes CNST6. applicable only with swizzles.
1 1 0 index<N> op0 encodes IDX6
1 1 1 index2 mode op0 encodes RIO6.

or selects other modes for encoding op0 if specified in alt_opt0.

or with Register Index Offset RIO6 using index1 mode if specified in opt0.

or with Constant CNST6 if specified in alt_opt0.

or with Index IDX6 if specified in alt_opt0.

or with Register Index Offset RIO6 using index2 mode if specified in alt_opt0.

Operand N

Source operand <N> can be encoded in different ways.

Usually the following fields are used to encode it:

  • alt_opt<N> - alter opt<N>. this bit can be combined with opt<N> to produce the following modes for op<N >:
alt_opt<N> opt<N> value details
1 0 0 index1 mode op<N> encodes RIO6.
1 0 1 {} op<N> encodes CNST6. applicable only with swizzles.
1 1 0 immediate op<N> encodes IMM6.
1 1 1 index2 mode op<N> encodes RIO6.

or selects other modes for encoding op<N> if specified in alt_opt<N>.

or with Register Index Offset RIO6 using index1 mode if specified in alt_opt<N>.

or with CNST6 if specified in alt_opt<N>.

or IMM6 if specified in alt_opt<N>.

or with Register Index Offset RIO6 using index2 mode if specified in alt_opt<N>.

Registers

  • pa - primary attribute register. 32 bit long.
  • sa - secondary attribute register. 32 bit long.
  • o - output register. 32 bit long.
  • r - temporary register. 32 bit long.
  • i - internal register. 128 bit long.

Register Selector RS2

This encoding uses 2 bits to encode register type.

selector is encoded as:

1 0 meaning
0 0 r
0 1 o
1 0 pa
1 1 sa

Note that internal registers are not encoded - they are reserved in Register R6

Register Selector Indexable RSI2

This encoding uses 2 bits to encode register type.

selector is encoded as:

1 0 meaning
0 0 r
0 1 o
1 0 pa
1 1 index<N> mode

When index<N> mode is used - there has to be another field that encodes index expression with Register Index Offset RIO6

The way that index expression is buit: 

<reg>[index1 * 2 + <offset>]

Example: 

r[index1 * 2 + 8]

Register R6

This encoding uses 6 bits to encode register index.

register is encoded as:

5 4 3 2 1 0 index
0 0 0 0 0 0 0
0 0 0 0 0 1 2
... ... ... ... ... ...
1 1 1 0 1 0 116
1 1 1 0 1 1 118
1 1 1 1 0 0 i0 (reserved)
1 1 1 1 0 1 i1 (reserved)
1 1 1 1 1 0 i2 (reserved)
1 1 1 1 1 1 i3 (reserved)

index is calculated as: value * 2

Register expression is built as: 

<reg><index>

Example: 

sa68

Specific type of register can be selected with Register Selector RS2

For destination operand op0 specific type of register can be selected with Register Selector Indexable RSI2

Last 4 values are reserved for internal registers i0, i1, i2, i3

Register RI2

This encoding uses 2 bits to encode internal register.

1 0 value
0 0 i0
0 1 i1
1 0 i2
1 1 i3

Register Index Offset RIO6

5 4 3 2 1 0
rt offset

rt is encoded as Register Selector RS2

offset is calculated as: value * 2

offset is encoded as:

3 2 1 0 offset
0 0 0 0 0
0 0 0 1 2
... ... ... ... ...
1 1 1 0 28
1 1 1 1 30

Immediates

Immediate IMM6

Some operands may act as immediate values which are encoded using 6 bits.

Indexes

Not sure what index<N> expression means.

It can be used in 2 places:

  • Alternative mode for operand 0

Index IDX6

Uses 6 bits to encode index<N> expression.

Index is calculated as value * 2. Max index is 126.

Example: 

 mad.f32 index24, r0, r0, r0

Constants

Constant CNST6

Some operands may act as constant values which are encoded using 6 bits.

Constants are taken from table below.

Constants differ in 32 and 16 bit mode.

Table for 16 bit mode does not have accurate values.

f32 mode:

operand value comment
0x00 0.0
0x01 0.0
0x02 1.0
0x03 1.0
0x04 2.0 2 ^ 1
0x05 8.0 2 ^ 3
0x06 32.0 2 ^ 5
0x07 128.0 2 ^ 7
0x08 512.0 2 ^ 9
0x09 2048.0 2 ^ 11
0x0A 8192.0 2 ^ 13
0x0B 32768.0 2 ^ 15
0x0C 0.5 2 ^ -1
0x0D 0.125 2 ^ -3
0x0E 0.03125 2 ^ -5
0x0F 0.0078125 2 ^ -7
0x10 0.001953125 2 ^ -9
0x11 0.00048828125 2 ^ -11
0x12 0.00012207031 2 ^ -13
0x13 0.000030517578 2 ^ -15
0x14 2.7182817 e
0x15 1.4142135 sqrt(2)
0x16 3.1415927 pi
0x17 0.78539819 pi / 4
0x18 6.2831855 pi * 2
0x19 25.132742 pi * 8
0x1A 0.000015258789 1 / 2 ^ 16
0x1B 0.000015259022 1 / (2 ^ 16 - 1)
0x1C 0.0000015500992 sin(0.5) - taylor 4th term
0x1D 0.00026041668 sin(0.5) - taylor 3rd term
0x1E 0.020833334 sin(0.5) - taylor 2nd term
0x1F 0.5 sin(0.5) - taylor 1st term
0x20 0.0
0x21 0.0
0x22 0.0078268051
0x23 513.0
0x24 2.204392e12
0x25 9.4724031e21
0x26 4.0703468e31
0x27 1.1941302e-7
0x28 2.7789457e-17
0x29 6.4670817e-27
0x2A 1.5050001e-36
0x2B 0.0000016857356
0x2C 0.00032089395
0x2D 0.19556534
0x2E 3281298.0
0x2F 0.0
0x30 0.0
0x31 4.6619181e-10
0x32 0.0
0x33 0.0
0x34 0.0
0x35 0.0
0x36 0.0
0x37 0.0
0x38 -1.#QNB 0xFFFFFFFF
0x39 -1.#QNB 0xFFFFFFFF
0x3A -1.#QNB 0xFFFFFFFF
0x3B -1.#QNB 0xFFFFFFFF
0x3C 1.#QNB 0x7FFF7FFF
0x3D 1.#QNB 0x7FFF7FFF
0x3E 1.#QNB 0x7FFF7FFF
0x3F 1.#QNB 0x7FFF7FFF

f16 mode:

operand value comment
0x00 0.0
0x01 0.0
0x02 0.0
0x03 0.0
0x04 0.0
0x05 0.0
0x06 0.0
0x07 0.0
0x08 0.0
0x09 0.0
0x0A 0.0
0x0B 0.0
0x0C 0.0
0x0D 0.0
0x0E 0.0
0x0F 0.0
0x10 0.0
0x11 0.0
0x12 0.0
0x13 0.0
0x14 -35456.0
0x15 7.5519e-05
0x16 0.00047946
0x17 0.00047946
0x18 0.00047946
0x19 0.00047946
0x1A 0.0
0x1B 7.6294e-06
0x1C 0.00030541
0x1D -0.0001384
0x1E -0.052094
0x1F 0.0
0x20 0.0
0x21 0.0
0x22 1.0
0x23 2.0 2 ^ 1
0x24 32.0 2 ^ 5
0x25 512.0 2 ^ 9
0x26 8192.0 2 ^ 13
0x27 0.5 2 ^ -1
0x28 0.03125 2 ^ -5
0x29 0.0019531 2 ^ -9
0x2A 0.00012207 2 ^ - 13
0x2B 2.7168 e
0x2C 1.4141 sqrt(2)
0x2D 3.1406 pi
0x2E 6.2813 pi * 2
0x2F 0.0
0x30 0.0
0x31 0.020828
0x32 0.0
0x33 0.0
0x34 0.0
0x35 0.0
0x36 0.0
0x37 0.0
0x38 -1.#QNB 0xFFFFFFFF
0x39 -1.#QNB 0xFFFFFFFF
0x3A -1.#QNB 0xFFFFFFFF
0x3B -1.#QNB 0xFFFFFFFF
0x3C 1.#QNB 0x7FFF7FFF
0x3D 1.#QNB 0x7FFF7FFF
0x3E 1.#QNB 0x7FFF7FFF
0x3F 1.#QNB 0x7FFF7FFF

Swizzles

Swizzle notation

There are 2 notations:

  • text notation
  • constant notation

When some of channels have constants - text notation is used 

mul.f32 r0.xyzw, r0.h1xx, r0.xxxx

When all channels have constants - constant notation is used 

mul.f32 r0.xyzw, {0.5, 1, 1, 0.5}, r0.xxxx

When channel is masked in text notation it is marked as - 

mul.f32 r0.-y-w, r0.-x-x, r0.-x-x

When channel is masked in constant notation it is replaced with zero 

mul.f32 r0.-y-w, {0, 1, 0, 0.5}, r0.-x-x

Register Swizzle RSWZ2

This encoding uses 2 bits to encode the swizzle.

Usually combinations are additinally controlled by 1 or more bits called swz_alt_op

This type of swizzling does not allow precise control on each channel as opposed to RSWZ3

Usually there is a predefined table of swizzles.

Swizzle expression is built as: 

<reg><index>.<swizzle>

Example: 

r22.x

Register Swizzle RSWZ3

This encoding uses 3 bits to encode the mask.

channel is encoded as:

2 1 0 text notation constant notation
0 0 0 x x
0 0 1 y y
0 1 0 z z
0 1 1 w w
1 0 0 0 0.0
1 0 1 1 1.0
1 1 0 2 2.0
1 1 1 h 0.5

swizzle expression is built as: 

<reg><index>.<swizzle>

Example: 

r22.x

Modifier and dest data format

At the moment it is not known which of the data format fields is dest and which is source.

This is the reason why term modifier is mixed with term dest data format.

0x00000000 - 0x08000000

Instructions

mad

Encoding

Higher 4 bytes

7 6 5 4 3 2 1 0
opcode1 data_format predicate
0 0 0 0 0
7 6 5 4 3 2 1 0
swz_alt_op1 alt_opt0 abs_op1 alt_opt2 alt_opt3
x x x
7 6 5 4 3 2 1 0
swz_alt_op3 op3_swz swz_alt_op2 swz_mask16 swz_mask32
x x
7 6 5 4 3 2 1 0
swz_en abs_op2 neg_op2 abs_op3 neg_op3 opt1 opt0

Lower 4 bytes

7 6 5 4 3 2 1 0
opt2 opt3 op0
7 6 5 4 3 2 1 0
op0 op2_swz op1_swz op1
7 6 5 4 3 2 1 0
op1 op2
7 6 5 4 3 2 1 0
op2 op3

Notes

  • x bits do not affect instruction or operands. might affect something else?
  • what do index<N> mean. are these registers or something?
  • is there a flag that allows to switch constant table? there is a second table that exists.
  • looks like there is functionality to switch sign of index expression
  • still need Register Swizzle RSWZ2? there are too many modes for swizzling
  • probably can move swizzling to generic section. if other instructions use same encodings.
  • Only first constant for op0 can be controlled. Other channels have some predefined values. This has to be explained.

Fields (instruction)

data_format:

2 value
0 f32
1 f16

predicate:

1 0 value
0 0
0 1 p0
1 0 !p0
1 1 Pn

Fields (operands)

Constants

Specific operand may be used as float constant. This can be achieved with following groups of bits:

  • alt_opt0, opt0, op0
  • alt_opt2, opt2, op2
  • alt_opt3, opt3, op3

Float constants can only be used when swizzling is enabled for particular operand. Consider checking sections Swizzles_f32 and Swizzles_f16.

Constants are taken from tables Constants.

Constants differ between 32 and 16 bit mode.

Constants are same for each operand.

Swizzle masking

Masking is controled by control bits:

  • control bits: swz_en, swz_mask32, swz_mask16

Each channel can be masked with control bits. Combinations of control bits produce the following masking table.

Encoding used in masking table:

value meaning
0 channel not selected
1 channel selected
x channel masked

Masking table 32 bit mode:

swz_mask32 swz_en ch0 ch1
0 0 0 0
0 1 1 0
1 0 x 1
1 1 1 1

Masking table 16 bit mode:

swz_mask16 swz_en ch0 ch1 ch2 ch3
0 0 0 0 0 0
0 1 1 1 0 0
1 0 x x 1 1
1 1 1 1 1 1

Swizzles f32

Swizzles of operand 1, operand 2 and operand 3 can not be precisely controlled and have predefined combinations.

Swizzles are controlled with bits:

  • swizzle fields: op1_swz, op2_swz, op3_swz
  • control bits: swz_alt_op1, swz_alt_op2, swz_alt_op3

Swizzles of operand 0 can not be controlled.

operand 0 operand 1 operand 2 operand 3
value
xy
swz_alt_op1 op1_swz value
0 0 0 xx
0 0 1 yy
0 1 0 zz
0 1 1 ww
1 0 0 xy
1 0 1 yz
1 1 0 xy
1 1 1 zw
swz_alt_op2 op2_swz value
0 0 0 xx
0 0 1 yy
0 1 0 zz
0 1 1 ww
1 0 0 xy
1 0 1 xy
1 1 0 yy
1 1 1 wy
swz_alt_op3 op3_swz value
0 0 0 xx
0 0 1 yy
0 1 0 zz
0 1 1 ww
1 0 0 xy
1 0 1 xz
1 1 0 xx
1 1 1 xy

Swizzles f16

Swizzles of operand 1, operand 2 and operand 3 can not be precisely controlled and have predefined combinations.

Swizzles are controlled with bits:

  • swizzle fields: op1_swz, op2_swz, op3_swz
  • control bits: swz_alt_op1, swz_alt_op2, swz_alt_op3

Swizzles of operand 0 can not be controlled.

operand 0 operand 1 operand 2 operand 3
value
xyzw
swz_alt_op1 op1_swz value
0 0 0 xxxx
0 0 1 yyyy
0 1 0 zzzz
0 1 1 wwww
1 0 0 xyzw
1 0 1 yzxw
1 1 0 xyww
1 1 1 zwxy
swz_alt_op2 op2_swz value
0 0 0 xxxx
0 0 1 yyyy
0 1 0 zzzz
0 1 1 wwww
1 0 0 xyzw
1 0 1 xyyz
1 1 0 yyww
1 1 1 wyzw
swz_alt_op3 op3_swz value
0 0 0 xxxx
0 0 1 yyyy
0 1 0 zzzz
0 1 1 wwww
1 0 0 xyzw
1 0 1 xzww
1 1 0 xxyz
1 1 1 xyzz

Examples

mad.f32 r0, r0, r0, r0
 
mad.f16 r0, r0, r0, r0

0x08000000 - 0x10000000

Instructions

mul.f32, add.f32, frc.f32, dsx.f32, dsy.f32, min.f32, max.f32, dot.f32

Encoding

Higher 4 bytes

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 0 0 1
7 6 5 4 3 2 1 0
op1_swz_c3x alt_opt0 op1_swz_c30 alt_opt1 alt_opt2
x x
7 6 5 4 3 2 1 0
swz_alt_op2 op2_swz swz_mask3 swz_mask2 swz_mask1
x
7 6 5 4 3 2 1 0
swz_en abs_op1 neg_op1 abs_op2 op1_swz_c2x opt0

Lower 4 bytes

7 6 5 4 3 2 1 0
opt1 opt2 op0
7 6 5 4 3 2 1 0
op0 op1_swz_c20 op1_swz_c1 op1_swz_c0
7 6 5 4 3 2 1 0
op1_swz_c0 opcode2 op1
7 6 5 4 3 2 1 0
op1 op2

Notes

  • do predicates apply to all instructions, so that opcode2 is now found?
  • test dot instruction and probably describe separately?
  • Only first constant for op0 can be controlled. Other channels have some predefined values. This has to be explained.

Fields (instruction)

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 !p0
1 0 1 !p1
1 1 0 !p2
1 1 1 Pn

opcode2:

6 5 4 value
0 0 0 mul.f32
0 0 1 add.f32
0 1 0 frc.f32
0 1 1 dsx.f32
1 0 0 dsy.f32
1 0 1 min.f32
1 1 0 max.f32
1 1 1 dot.f32

Fields (operands)

  • op1_swz_c3x - operand 1 swizzling channel 3 bit 1, 2. encoded as RSWZ3.
  • alt_opt0 - consult Operand 0.
  • op1_swz_c30 - operand 1 swizzling channel 3 bit 0. encoded as RSWZ3.
  • alt_opt1 - consult Operand N.
  • alt_opt2 - consult Operand N.
  • swz_alt_op2 - change op2 swizzle.
  • op2_swz - op2 swizzle encoded with Register Swizzle RSWZ2.
  • swz_mask3 - masks first, second and third channel for swizzles
  • swz_mask2 - masks first and second channel for swizzles
  • swz_mask1 - masks first channel for swizzles
  • swz_en - enables usage of swizzling.
  • abs_op1 - add abs modifier to op1.
  • neg_op1 - negate op1.
  • abs_op2 - add abs modifier to op2.
  • op1_swz_c2x - operand 1 swizzling channel 2 bit 1, 2. encoded as RSWZ3.
  • opt0 - consult Operand 0.
  • opt1 - consult Operand N.
  • opt2 - consult Operand N.
  • op0 - consult Operand 0.
  • op1_swz_c20 - operand 1 swizzling channel 2 bit 0. encoded as RSWZ3.
  • op1_swz_c1 - operand 1 swizzling channel 1. encoded as RSWZ3.
  • op1_swz_c0 - operand 1 swizzling channel 0. encoded as RSWZ3.
  • op1 - consult Operand N.
  • op2 - consult Operand N.

Constants

Specific operand may be used as float constant. This can be achieved with following groups of bits:

  • alt_opt0, opt0, op0
  • alt_opt1, opt1, op1
  • alt_opt2, opt2, op2

Float constants can only be used when swizzling is enabled for particular operand. Consider checking sections Swizzle_masking.

Constants are taken from tables Constants.

Constants correspond to table for 32 bit mode.

Constants are same for each operand.

Swizzle masking

Masking is controled by control bits:

  • control bits: swz_en, swz_mask1, swz_mask2, swz_mask3

Each channel can be masked with control bits. Combinations of control bits produce the following masking table.

dot.f32 instruction has explicit swizzling in operand 1 and operand 2 so masking does not apply to these operands. number of channels is always 3.

Encoding used in masking table:

value meaning
0 channel not selected
1 channel selected
x channel masked

Masking table:

swz_mask3 swz_mask2 swz_mask1 swz_en ch0 ch1 ch2 ch3
0 0 0 0 0 0 0 0
0 0 0 1 1 0 0 0
0 0 1 0 x 1 0 0
0 0 1 1 1 1 0 0
0 1 0 0 x x 1 0
0 1 0 1 1 x 1 0
0 1 1 0 x 1 1 0
0 1 1 1 1 1 1 0
1 0 0 0 x x x 1
1 0 0 1 1 x x 1
1 0 1 0 x 1 x 1
1 0 1 1 1 1 x 1
1 1 0 0 x x 1 1
1 1 0 1 1 x 1 1
1 1 1 0 x 1 1 1
1 1 1 1 1 1 1 1

Swizzles (operand 0)

Swizzles of operand 0 can not be controled and have predefined combinations described below:

value
xyzw

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

Swizzles (operand 1)

Each channel of operand 1 can be precisely controlled with swizzle fields encoded as RSWZ3.

  • op1_swz_c0, op1_swz_c1, op1_swz_c20, op1_swz_c2x, op1_swz_c30, op1_swz_c3x

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

masking does not apply for dot.f32 instruction

Swizzles (operand 2)

Swizzles of operand 2 can not be precisely controlled and have predefined combinations described below and controlled by swizzle fields:

  • op2_swz, swz_alt_op2

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

masking does not apply for dot.f32 instruction

swz_alt_op2 op2_swz value
0 0 0 0 xxxx
0 0 0 1 yyyy
0 0 1 0 zzzz
0 0 1 1 wwww
0 1 0 0 xyzw
0 1 0 1 yzww
0 1 1 0 xyzz
0 1 1 1 xxyz
1 0 0 0 xyxy
1 0 0 1 xywz
1 0 1 0 zxyw
1 0 1 1 zwzw
1 1 0 0 yzxz
1 1 0 1 xxyy
1 1 1 0 xzww
1 1 1 1 xyz1

Examples

mul.f32 r0, r0, r0
add.f32 r0, r0, r0
frc.f32 r0, r0, r0
dsx.f32 r0, r0, r0
dsy.f32 r0, r0, r0
min.f32 r0, r0, r0
max.f32 r0, r0, r0
dot.f32 r0, r0.xxxx, r0.xxxx

0x10000000 - 0x18000000

Instructions

mul.f16, add.f16, frc.f16, dsx.f16, dsy.f16, min.f16, max.f16, dot.f16

Encoding

Higher 4 bytes

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 0 1 0
7 6 5 4 3 2 1 0
op1_swz_c3x alt_opt0 op1_swz_c30 alt_opt1 alt_opt2
x x
7 6 5 4 3 2 1 0
swz_alt_op2 op2_swz swz_mask3 swz_mask2 swz_mask1
x
7 6 5 4 3 2 1 0
swz_en abs_op1 neg_op1 abs_op2 op1_swz_c2x opt0

Lower 4 bytes

7 6 5 4 3 2 1 0
opt1 opt2 op0
7 6 5 4 3 2 1 0
op0 op1_swz_c20 op1_swz_c1 op1_swz_c0
7 6 5 4 3 2 1 0
op1_swz_c0 opcode2 op1
7 6 5 4 3 2 1 0
op1 op2

Notes

  • do predicates apply to all instructions, so that opcode2 is now found?
  • test dot instruction and probably describe separately?
  • Only first constant for op0 can be controlled. Other channels have some predefined values. This has to be explained.

Fields (instruction)

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 !p0
1 0 1 !p1
1 1 0 !p2
1 1 1 Pn

opcode2:

6 5 4 value
0 0 0 mul.f16
0 0 1 add.f16
0 1 0 frc.f16
0 1 1 dsx.f16
1 0 0 dsy.f16
1 0 1 min.f16
1 1 0 max.f16
1 1 1 dot.f16

Fields (operands)

  • op1_swz_c3x - operand 1 swizzling channel 3 bit 1, 2. encoded as RSWZ3.
  • alt_opt0 - consult Operand 0.
  • op1_swz_c30 - operand 1 swizzling channel 3 bit 0. encoded as RSWZ3.
  • alt_opt1 - consult Operand N.
  • alt_opt2 - consult Operand N.
  • swz_alt_op2 - change op2 swizzle.
  • op2_swz - op2 swizzle encoded with Register Swizzle RSWZ2.
  • swz_mask3 - masks first, second and third channel for swizzles
  • swz_mask2 - masks first and second channel for swizzles
  • swz_mask1 - masks first channel for swizzles
  • swz_en - enables usage of swizzling.
  • abs_op1 - add abs modifier to op1.
  • neg_op1 - negate op1.
  • abs_op2 - add abs modifier to op2.
  • op1_swz_c2x - operand 1 swizzling channel 2 bit 1, 2. encoded as RSWZ3.
  • opt0 - consult Operand 0.
  • opt1 - consult Operand N.
  • opt2 - consult Operand N.
  • op0 - consult Operand 0.
  • op1_swz_c20 - operand 1 swizzling channel 2 bit 0. encoded as RSWZ3.
  • op1_swz_c1 - operand 1 swizzling channel 1. encoded as RSWZ3.
  • op1_swz_c0 - operand 1 swizzling channel 0. encoded as RSWZ3.
  • op1 - consult Operand N.
  • op2 - consult Operand N.

Constants

Specific operand may be used as float constant. This can be achieved with following groups of bits:

  • alt_opt0, opt0, op0
  • alt_opt1, opt1, op1
  • alt_opt2, opt2, op2

Float constants can only be used when swizzling is enabled for particular operand. Consider checking sections Swizzle_masking.

Constants are taken from tables Constants.

Constants correspond to table for 16 bit mode.

Constants are same for each operand.

Swizzle masking

Masking is controled by control bits:

  • control bits: swz_en, swz_mask1, swz_mask2, swz_mask3

Each channel can be masked with control bits. Combinations of control bits produce the following masking table.

dot.f16 instruction has explicit swizzling in operand 1 and operand 2 so masking does not apply to these operands. number of channels is always 3.

Encoding used in masking table:

value meaning
0 channel not selected
1 channel selected
x channel masked

Masking table:

swz_mask3 swz_mask2 swz_mask1 swz_en ch0 ch1 ch2 ch3
0 0 0 0 0 0 0 0
0 0 0 1 1 0 0 0
0 0 1 0 x 1 0 0
0 0 1 1 1 1 0 0
0 1 0 0 x x 1 0
0 1 0 1 1 x 1 0
0 1 1 0 x 1 1 0
0 1 1 1 1 1 1 0
1 0 0 0 x x x 1
1 0 0 1 1 x x 1
1 0 1 0 x 1 x 1
1 0 1 1 1 1 x 1
1 1 0 0 x x 1 1
1 1 0 1 1 x 1 1
1 1 1 0 x 1 1 1
1 1 1 1 1 1 1 1

Swizzles (operand 0)

Swizzles of operand 0 can not be controled and have predefined combinations described below:

value
xyzw

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

Swizzles (operand 1)

Each channel of operand 1 can be precisely controlled with swizzle fields encoded as RSWZ3.

  • op1_swz_c0, op1_swz_c1, op1_swz_c20, op1_swz_c2x, op1_swz_c30, op1_swz_c3x

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

masking does not apply for dot.f16 instruction

Swizzles (operand 2)

Swizzles of operand 2 can not be precisely controlled and have predefined combinations described below and controlled by swizzle fields:

  • op2_swz, swz_alt_op2

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

masking does not apply for dot.f16 instruction

swz_alt_op2 op2_swz value
0 0 0 0 xxxx
0 0 0 1 yyyy
0 0 1 0 zzzz
0 0 1 1 wwww
0 1 0 0 xyzw
0 1 0 1 yzww
0 1 1 0 xyzz
0 1 1 1 xxyz
1 0 0 0 xyxy
1 0 0 1 xywz
1 0 1 0 zxyw
1 0 1 1 zwzw
1 1 0 0 yzxz
1 1 0 1 xxyy
1 1 1 0 xzww
1 1 1 1 xyz1

Examples

mul.f16 r0, r0, r0
add.f16 r0, r0, r0
frc.f16 r0, r0, r0
dsx.f16 r0, r0, r0
dsy.f16 r0, r0, r0
min.f16 r0, r0, r0
max.f16 r0, r0, r0
dot.f16 r0, r0.xxxx, r0.xxxx

0x18000000 - 0x20000000

Instructions

dot.f32, mad.f32

Encoding (dot.f32)

Higher 4 bytes

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 0 1 1
7 6 5 4 3 2 1 0
opcode2 c3_en alt_opt0 alt_opt1
x x 0 x x
7 6 5 4 3 2 1 0
abs_op2 swz_en_strange1 swz_en_strange0 swz_mask3 swz_mask2 swz_mask1
x x
7 6 5 4 3 2 1 0
swz_en neg_op1 abs_op1 opt0
x x x

Lower 4 bytes

7 6 5 4 3 2 1 0
opt1 op2i op0
7 6 5 4 3 2 1 0
op0 swz_alt_op2 op2_swz op1_swz_c3
7 6 5 4 3 2 1 0
op1_swz_c3 op1_swz_c2 op1_swz_c1 op1_swz_c0
7 6 5 4 3 2 1 0
op1_swz_c0 op1

Encoding (mad.f32)

Higher 4 bytes

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 0 1 1
7 6 5 4 3 2 1 0
swz_alt_op3_2 opcode2 alt_opt0 alt_opt1
x 1 x x x
7 6 5 4 3 2 1 0
abs_op2 op0_strange1 op0_strange0 swz_mask3 swz_mask2 swz_mask1
x
7 6 5 4 3 2 1 0
swz_en neg_op1 abs_op1 neg_op3 abs_op3 swz_alt_op2_2 opt0

Lower 4 bytes

7 6 5 4 3 2 1 0
opt1 op2i op0
7 6 5 4 3 2 1 0
op0 swz_alt_op2_x op2_swz swz_alt_op3_x
7 6 5 4 3 2 1 0
op3_swz op3i swz_alt_op1
x
7 6 5 4 3 2 1 0
op1_swz op1

Notes

  • Only first constant for op0 can be controlled. Other channels have some predefined values. This has to be explained.
  • Any way to use constants for op2?

Fields (instruction)

opcode2:

5 value
0 dot.f32
1 mad.f32

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 !p0
1 0 1 !p1
1 1 0 !p2
1 1 1 Pn

Fields (operands) dot.f32

  • c3_en - enable channel 3 for swizzles for op1 and op2. by default dot.f32 has only 3 channels for op1 and op2.
  • alt_opt0 - consult Operand 0.
  • alt_opt1 - consult Operand N.
  • abs_op2 - add abs modifier to op2.
  • swz_en_strange1 - force overrides swizzle masking with single channel
  • swz_en_strange0 - force overrides swizzle masking with single channel
  • swz_mask3 - masks first, second and third channel for swizzles
  • swz_mask2 - masks first and second channel for swizzles
  • swz_mask1 - masks first channel for swizzles
  • swz_en - enables usage of swizzling.
  • neg_op1 - negate op1.
  • abs_op1 - add abs modifier to op1.
  • opt0 - consult Operand 0.
  • opt1 - consult Operand N.
  • op2i - encoded with RI2
  • op0 - consult Operand 0.
  • swz_alt_op2 - change op2 swizzle.
  • op2_swz - op2 swizzle encoded with Register Swizzle RSWZ2.
  • op1_swz_c3 - operand 1 swizzling channel 3. encoded as RSWZ3.
  • op1_swz_c2 - operand 1 swizzling channel 2. encoded as RSWZ3.
  • op1_swz_c1 - operand 1 swizzling channel 1. encoded as RSWZ3.
  • op1_swz_c0 - operand 1 swizzling channel 0. encoded as RSWZ3.
  • op1 - consult Operand N.

Constants (dot.f32)

Specific operand may be used as float constant. This can be achieved with following groups of bits:

  • alt_opt0, opt0, op0
  • alt_opt1, opt1, op1

Float constants can only be used when swizzling is enabled for particular operand. Consider checking sections Swizzle_masking.

Constants are taken from tables Constants.

Constants correspond to table for 32 bit mode.

Constants are same for each operand.

Swizzle masking (dot.f32)

Masking is controled by control bits:

  • control bits: swz_en, swz_mask1, swz_mask2, swz_mask3

Each channel can be masked with control bits. Combinations of control bits produce the following masking table.

dot.f32 instruction has explicit swizzling in operand 1 and operand 2 so masking does not apply to these operands. number of channels is 3 or 4 depending on c3_en.

Encoding used in masking table:

value meaning
0 channel not selected
1 channel selected
x channel masked

Masking table operand 0:

swz_mask3 swz_mask2 swz_mask1 swz_en ch0 ch1 ch2 ch3
0 0 0 0 0 0 0 0
0 0 0 1 1 0 0 0
0 0 1 0 x 1 0 0
0 0 1 1 1 1 0 0
0 1 0 0 x x 1 0
0 1 0 1 1 x 1 0
0 1 1 0 x 1 1 0
0 1 1 1 1 1 1 0
1 0 0 0 x x x 1
1 0 0 1 1 x x 1
1 0 1 0 x 1 x 1
1 0 1 1 1 1 x 1
1 1 0 0 x x 1 1
1 1 0 1 1 x 1 1
1 1 1 0 x 1 1 1
1 1 1 1 1 1 1 1

Swizzles (operand 0) dot.f32

Swizzles of operand 0 can not be controled and have predefined combinations described below:

value
xyzw

Each channel can be masked with control bits. Masking is described in Swizzle_masking.

  • swz_en, swz_mask1, swz_mask2, swz_mask3

Swizzles (operand 1) dot.f32

Each channel of operand 1 can be precisely controlled with swizzle fields encoded as RSWZ3.

  • op1_swz_c0, op1_swz_c1, op1_swz_c2, op1_swz_c3

Channel 3 can be enabled with bit:

  • c3_en

Swizzles (operand 2) dot.f32

Swizzles of operand 2 can not be precisely controlled and have predefined combinations described below and controlled by swizzle fields:

  • op2_swz, swz_alt_op2

Channel 3 can be enabled with bit:

  • c3_en

3 channels:

swz_alt_op2 op2_swz value
0 0 0 0 xxx
0 0 0 1 yyy
0 0 1 0 zzz
0 0 1 1 www
0 1 0 0 xyz
0 1 0 1 yzw
0 1 1 0 xxy
0 1 1 1 xyx
1 0 0 0 yyx
1 0 0 1 yyz
1 0 1 0 zxy
1 0 1 1 xzy
1 1 0 0 yzx
1 1 0 1 zyx
1 1 1 0 zzy
1 1 1 1 xy1

4 channels:

swz_alt_op2 op2_swz value
0 0 0 0 xxxx
0 0 0 1 yyyy
0 0 1 0 zzzz
0 0 1 1 wwww
0 1 0 0 xyzw
0 1 0 1 yzww
0 1 1 0 xyzz
0 1 1 1 xxyz
1 0 0 0 xyxy
1 0 0 1 xywz
1 0 1 0 zxyw
1 0 1 1 zwzw
1 1 0 0 yzxz
1 1 0 1 xxyy
1 1 1 0 xzww
1 1 1 1 xyz1

Fields (operands) mad.f32

  • swz_alt_op3_2
  • alt_opt0
  • alt_opt1
  • abs_op2
  • op0_strange1
  • op0_strange0
  • swz_mask3
  • swz_mask2
  • swz_mask1
  • swz_en
  • neg_op1
  • abs_op1
  • neg_op3
  • abs_op3
  • swz_alt_op2_2
  • opt0
  • opt1
  • op2i
  • op0
  • swz_alt_op2_x
  • op2_swz
  • swz_alt_op3_x
  • op3_swz
  • op3i
  • swz_alt_op1
  • op1_swz
  • op1

Examples

dot.f32 r0, r0.xxx, i0.xxx

mad.f32 r0, r0, i0, i0

0x20000000 - 0x28000000

Instructions: dot, mov, rsq, rcp, exp, log

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 1 0 0 x
7 6 5 4 3 2 1 0
op_sel data_format
x x x x x x
7 6 5 4 3 2 1 0
opcode2
x 1 x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

Having bit 3 in byte 2 set to 0 produces invalid instruction

Fields:

data_format:

5 value
0 f32
1 f16

predicate:

1 0 value
0 0
0 1 p0
1 0 !p0
1 1 Pn

opcode2 (depends on op_sel):

op_sel 6 5 4 value
0 0 0 0 invalid
0 0 0 1 invalid
0 0 1 0 dot
0 0 1 1 invalid
0 1 0 0 invalid
0 1 0 1 mov
0 1 1 0 rsq
0 1 1 1 rcp
op_sel 6 5 4 value
1 0 0 0 invalid
1 0 0 1 invalid
1 0 1 0 invalid
1 0 1 1 invalid
1 1 0 0 exp
1 1 0 1 log
1 1 1 0 invalid
1 1 1 1 invalid

Examples: 

dot.f32
mov.f32
rsq.f32
rcp.f32
exp.f32
log.f32

dot.f16
mov.f16
rsq.f16
rcp.f16
exp.f16
log.f16

0x28000000 - 0x30000000

Instructions: dot, mov, rsq, rcp

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 1 0 1 x
7 6 5 4 3 2 1 0
data_format
x x x x x x x
7 6 5 4 3 2 1 0
opcode2
x 1 x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

Having bit 3 in byte 2 set to 0 produces invalid instruction

Fields:

data_format:

5 value
0 f32
1 f16

predicate:

1 0 value
0 0
0 1 p0
1 0 !p0
1 1 Pn

opcode2:

6 5 4 value
0 0 0 invalid
0 0 1 invalid
0 1 0 dot
0 1 1 invalid
1 0 0 invalid
1 0 1 mov
1 1 0 rsq
1 1 1 rcp

Examples: 

dot.f32
mov.f32
rsq.f32
rcp.f32

dot.f16
mov.f16
rsq.f16
rcp.f16

0x30000000 - 0x38000000

Instructions: rcp, rsq, log, exp

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 1 1 0
7 6 5 4 3 2 1 0
data_format
x x x x x x
7 6 5 4 3 2 1 0
opcode2 modifier
x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

modifier should be omitted if data_format matches modifier.

Fields:

opcode2:

2 1 value
0 0 rcp
0 1 rsq
1 0 log
1 1 exp

data_format:

6 5 value
0 0 f32
0 1 f16
1 0 fx10
1 1 invalid

modifier:

0 value
0 f32
1 fx10

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

rcp.f32
rsq.f32
log.f32
exp.f32

rcp.f32.fx10
rsq.f32.fx10
log.f32.fx10
exp.f32.fx10

rcp.f16.f32
rsq.f16.f32
log.f16.f32
exp.f16.f32

rcp.f16.fx10
rsq.f16.fx10
log.f16.fx10
exp.f16.fx10

rcp.fx10.f32
rsq.fx10.f32
log.fx10.f32
exp.fx10.f32

rcp.fx10
rsq.fx10
log.fx10
exp.fx10

0x38000000 - 0x40000000

Instructions: mov, cmov, cmov8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 0 1 1 1
7 6 5 4 3 2 1 0
cond
x x x x x x x
7 6 5 4 3 2 1 0
opcode2 data_format
x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

cond is only applicable to cmov and cmov8 since this is conditional move.

Fields:

opcode2:

7 6 value
0 0 mov
0 1 cmov
1 0 cmov8
1 1 invalid

cond:

6 value
0 eqzero
1 ltzero

data_format:

2 1 0 value
0 0 0 i8
0 0 1 i16
0 1 0 i32
0 1 1 fx10
1 0 0 f16
1 0 1 f32
1 1 0 invalid
1 1 1 invalid

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

mov.i8
mov.i16
mov.i32
mov.fx10
mov.f16
mov.f32

cmov.eqzero.i8
cmov.eqzero.i16
cmov.eqzero.i32
cmov.eqzero.fx10
cmov.eqzero.f16
cmov.eqzero.f32

cmov8.eqzero.i8
cmov8.eqzero.i16
cmov8.eqzero.i32
cmov8.eqzero.fx10
cmov8.eqzero.f16
cmov8.eqzero.f32

cmov.ltzero.i8
cmov.ltzero.i16
cmov.ltzero.i32
cmov.ltzero.fx10
cmov.ltzero.f16
cmov.ltzero.f32

cmov8.ltzero.i8
cmov8.ltzero.i16
cmov8.ltzero.i32
cmov8.ltzero.fx10
cmov8.ltzero.f16
cmov8.ltzero.f32

0x40000000 - 0x48000000

Instructions: pack, (mov)

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 0 0 0
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
modifier data_format
x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

when modifier matches data_format it shall be omitted since it has no effect in terms of packing.

furthermore instruction mnemonic shall be replaced to mov

Fields:

data_format:

0 value
0 u8
1 s16

modifier:

3 2 1 value
0 0 0 u8
0 0 1 s8
0 1 0 o8
0 1 1 u16
1 0 0 s16
1 0 1 f16
1 1 0 f32
1 1 1 invalid

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

mov.u8
pack.s16.u8
pack.u8.s8
pack.s16.s8
pack.u8.o8
pack.s16.o8
pack.u8.u16
pack.s16.u16
pack.u8.s16
mov.s16
pack.u8.f16
pack.s16.f16
pack.u8.f32
pack.s16.f32

0x48000000 - 0x50000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
0 1 0 0 1 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0x50000000 - 0x58000000

Instructions: and.u32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 0 1 0
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

and.u32

0x58000000 - 0x60000000

Instructions: xor.u32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 0 1 1
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

xor.u32

0x60000000 - 0x68000000

Instructions: shl.u32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 1 0 0
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

shl.u32

0x68000000 - 0x70000000

Instructions: shr.u32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 1 0 1 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

shr.u32

0x70000000 - 0x78000000

Instructions: rlp.u32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
0 1 1 1 0 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

rlp.u32

0x78000000 - 0x80000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
0 1 1 1 1 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0x80000000 - 0x88000000

Instructions: add.fx8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 0 0 0 x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

add.fx8

0x88000000 - 0x90000000

Instructions: add.fx8, sub.fx8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 0 0 1 x
7 6 5 4 3 2 1 0
opcode2
x x x x x x
7 6 5 4 3 2 1 0
x x x x 0 0 x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

Having bits 2, 3 in byte 2 set to 1 produces invalid instruction

Fields:

opcode2:

5 4 value
0 0 add.fx8
0 1 sub.fx8
1 0 invalid
1 1 invalid

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

add.fx8

sub.fx8

0x90000000 - 0x98000000

Instructions: add.fx8, sub.fx8, min.fx8, max.fx8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 0 1 0 x
7 6 5 4 3 2 1 0
opcode2
x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x 0
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

Having bit 0 in byte 2 set to 1 produces invalid instruction

Fields:

opcode2:

5 4 value
0 0 add.fx8
0 1 sub.fx8
1 0 min.fx8
1 1 max.fx8

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

add.fx8

sub.fx8

min.fx8

max.fx8

0x98000000 - 0xA0000000

Instructions: mad.u8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 0 1 1 x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
modifier
x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

modifier:

3 value
0
1 sat

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

mad.u8
mad.sat.u8

0xA0000000 - 0xA8000000

Instructions: mad

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 1 0 0 x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
data_format modifier
x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

data_format:

3 value
0 u16
1 i16

modifier:

2 value
0
1 sat

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

mad.u16
mad.u16.sat
mad.i16
mad.i16.sat

0xA8000000 - 0xB0000000

Instructions: mad

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 0 1 0 1 x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
data_format modifier
x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

data_format:

3 value
0 u32
1 i32

modifier:

2 value
0
1 sat

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

mad.u32
mad.u32.sat
mad.i32
mad.i32.sat

0xB0000000 - 0xB8000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
1 0 1 1 0 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0xB8000000 - 0xC0000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
1 0 1 1 1 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0xC0000000 - 0xC8000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
1 1 0 0 0 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0xC8000000 - 0xD0000000

Instructions: mad.u8

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 0 0 1 x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
modifier
x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

modifier:

3 value
0
1 sat

predicate:

2 1 value
0 0
0 1 p0
1 0 p1
1 1 !p0

Examples: 

mad.u8
mad.sat.u8

0xD0000000 - 0xD8000000

Instructions: mad

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 0 1 0
7 6 5 4 3 2 1 0
modifier
x x 0 x x x x
7 6 5 4 3 2 1 0
data_format
x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

Having bit 5 in byte 1 set to 1 produces invalid instruction

Fields:

modifier:

4 value
0 s0
1 s1

data_format:

1 value
0 u32
1 i32

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

mad.u32.s0
mad.i32.s0

mad.u32.s1
mad.i32.s1

0xD8000000 - 0xE0000000

Instructions: this group only contains illegal instructions

Encoding:

7 6 5 4 3 2 1 0
opcode1
1 1 0 1 1 x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
x x x x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

0xE0000000 - 0xE8000000

Instructions: tex

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 1 0 0 0 0 0
7 6 5 4 3 2 1 0
modifier
x x x x x x x
7 6 5 4 3 2 1 0
data_format dim func
x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

dim:

3 2 value
0 0 1D
0 1 2D
1 0 Cube
1 1 invalid

func:

1 0 value
0 0
0 1 Bias
1 0 Replace
1 1 Grad

modifier:

3 value
0
1 minp

data_format:

7 6 value
0 0
0 1 invalid
1 0 f16
1 1 f32

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

tex1D
tex1D.f16
tex1D.f32
tex1D.minp
tex1D.minp.f16
tex1D.minp.f32

tex1DBias
tex1DBias.f16
tex1DBias.f32
tex1DBias.minp
tex1DBias.minp.f16
tex1DBias.minp.f32

tex1DReplace
tex1DReplace.f16
tex1DReplace.f32
tex1DReplace.minp
tex1DReplace.minp.f16
tex1DReplace.minp.f32

tex1DGrad
tex1DGrad.f16
tex1DGrad.f32
tex1DGrad.minp
tex1DGrad.minp.f16
tex1DGrad.minp.f32

tex2D
tex2D.f16
tex2D.f32
tex2D.minp
tex2D.minp.f16
tex2D.minp.f32

tex2DBias
tex2DBias.f16
tex2DBias.f32
tex2DBias.minp
tex2DBias.minp.f16
tex2DBias.minp.f32

tex2DReplace
tex2DReplace.f16
tex2DReplace.f32
tex2DReplace.minp
tex2DReplace.minp.f16
tex2DReplace.minp.f32

tex2DGrad
tex2DGrad.f16
tex2DGrad.f32
tex2DGrad.minp
tex2DGrad.minp.f16
tex2DGrad.minp.f32

texCube
texCube.f16
texCube.f32
texCube.minp
texCube.minp.f16
texCube.minp.f32

texCubeBias
texCubeBias.f16
texCubeBias.f32
texCubeBias.minp
texCubeBias.minp.f16
texCubeBias.minp.f32

texCubeReplace
texCubeReplace.f16
texCubeReplace.f32
texCubeReplace.minp
texCubeReplace.minp.f16
texCubeReplace.minp.f32

texCubeGrad
texCubeGrad.f16
texCubeGrad.f32
texCubeGrad.minp
texCubeGrad.minp.f16
texCubeGrad.minp.f32

0xE8000000 - 0xF0000000

Instructions: lda32, ldl32, ldt32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 1 0 1
7 6 5 4 3 2 1 0
modifier
x x x x x x x
7 6 5 4 3 2 1 0
index opcode2
x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

index is only applicable when fetch modifier is specified

Fields:

modifier:

5 value
0 fetch
1

index:

7 6 5 4 value
0 0 0 0 1
0 0 0 1 2
0 0 1 0 3
0 0 1 1 4
0 1 0 0 5
0 1 0 1 6
0 1 1 0 7
0 1 1 1 8
1 0 0 0 9
1 0 0 1 10
1 0 1 0 11
1 0 1 1 12
1 1 0 0 13
1 1 0 1 14
1 1 1 0 15
1 1 1 1 16

opcode2:

3 2 value
0 0 lda32
0 1 ldl32
1 0 ldt32
1 1 invalid

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

lda32
ldl32
ldt32

lda32.fetch1
lda32.fetch2
lda32.fetch3
lda32.fetch4
lda32.fetch5
lda32.fetch6
lda32.fetch7
lda32.fetch8
lda32.fetch9
lda32.fetch10
lda32.fetch11
lda32.fetch12
lda32.fetch13
lda32.fetch14
lda32.fetch15
lda32.fetch16

ldl32.fetch1
ldl32.fetch2
ldl32.fetch3
ldl32.fetch4
ldl32.fetch5
ldl32.fetch6
ldl32.fetch7
ldl32.fetch8
ldl32.fetch9
ldl32.fetch10
ldl32.fetch11
ldl32.fetch12
ldl32.fetch13
ldl32.fetch14
ldl32.fetch15
ldl32.fetch16

ldt32.fetch1
ldt32.fetch2
ldt32.fetch3
ldt32.fetch4
ldt32.fetch5
ldt32.fetch6
ldt32.fetch7
ldt32.fetch8
ldt32.fetch9
ldt32.fetch10
ldt32.fetch11
ldt32.fetch12
ldt32.fetch13
ldt32.fetch14
ldt32.fetch15
ldt32.fetch16

0xF0000000 - 0xF8000000

Instructions: sta32, stl32, stt32

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 1 1 0
7 6 5 4 3 2 1 0
modifier
x x x x x x x
7 6 5 4 3 2 1 0
index opcode2
x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Notes:

index is only applicable when fetch modifier is specified

Fields:

modifier:

5 value
0 fetch
1

index:

7 6 5 4 value
0 0 0 0 1
0 0 0 1 2
0 0 1 0 3
0 0 1 1 4
0 1 0 0 5
0 1 0 1 6
0 1 1 0 7
0 1 1 1 8
1 0 0 0 9
1 0 0 1 10
1 0 1 0 11
1 0 1 1 12
1 1 0 0 13
1 1 0 1 14
1 1 1 0 15
1 1 1 1 16

opcode2:

3 2 value
0 0 sta32
0 1 stl32
1 0 stt32
1 1 invalid

predicate:

2 1 0 value
0 0 0
0 0 1 p0
0 1 0 p1
0 1 1 p2
1 0 0 p3
1 0 1 !p0
1 1 0 !p1
1 1 1 Pn

Examples: 

sta32
stl32
stt32

sta32.fetch1
sta32.fetch2
sta32.fetch3
sta32.fetch4
sta32.fetch5
sta32.fetch6
sta32.fetch7
sta32.fetch8
sta32.fetch9
sta32.fetch10
sta32.fetch11
sta32.fetch12
sta32.fetch13
sta32.fetch14
sta32.fetch15
sta32.fetch16

stl32.fetch1
stl32.fetch2
stl32.fetch3
stl32.fetch4
stl32.fetch5
stl32.fetch6
stl32.fetch7
stl32.fetch8
stl32.fetch9
stl32.fetch10
stl32.fetch11
stl32.fetch12
stl32.fetch13
stl32.fetch14
stl32.fetch15
stl32.fetch16

stt32.fetch1
stt32.fetch2
stt32.fetch3
stt32.fetch4
stt32.fetch5
stt32.fetch6
stt32.fetch7
stt32.fetch8
stt32.fetch9
stt32.fetch10
stt32.fetch11
stt32.fetch12
stt32.fetch13
stt32.fetch14
stt32.fetch15
stt32.fetch16

0xF8000000 - 0xFF000000

Notes:

this instruction group is much more complex than others so description is given in form of "glued" truth tables instead of independent truth tables.

predicate 000

Instructions:

Encoding:

7 6 5 4 3 2 1 0
opcode1 predicate
1 1 1 1 1 0 0 0
7 6 5 4 3 2 1 0
modifier1 opcode2
x x x x
7 6 5 4 3 2 1 0
opcode4 modifier2 opcode3
x x x x x
7 6 5 4 3 2 1 0
? ? ? ? ? ? ? ?

Fields:

opcode2:

predicate modifier1 opcode3 opcode4 modifier2 5 4 3 value
0 0 0 0 0 x 0 0 0 0 ba
0 0 0 0 1 x 0 0 0 0 mov
0 0 0 0 0 x 1 0 0 0 ba.savelink
0 0 0 0 1 x 1 0 0 0 mov
0 0 0 0 0 x x 0 0 1 mov.f32
0 0 0 0 1 x x 0 0 1 mov
0 0 0 0 x x x 0 1 x mov.f32
0 0 0 0 x x x 1 0 x mov.f32
0 0 0 0 x 0 x 1 1 x pcoeff
0 0 0 0 x 1 x 1 1 x ptoff
predicate modifier1 opcode4 5 4 3 value
0 0 0 1 x 0 0 x invalid
0 0 0 1 x 0 1 x invalid
0 0 0 1 x 1 0 x mov.f32
0 0 0 1 0 1 1 x pcoeff
0 0 0 1 1 1 1 x ptoff

Examples: 



predicate 001


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
0
0
1









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





sub_pred





x
x
x
x
x


x





modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2:













predicate
modifier1
opcode3
modifier2
sub_pred
5
4
3
value




0
0
1
0
0
0
x
x
0
0
0
p0 ba




0
0
1
0
1
0
x
x
0
0
0
p0 mov




0
0
1
0
0
1
x
x
0
0
0
p0 ba.savelink




0
0
1
0
1
1
x
x
0
0
0
p0 mov




0
0
1
0
0
x
x
x
0
0
1
mov.f32




0
0
1
0
1
x
x
x
0
0
1
p0 mov




0
0
1
0
x
x
x
x
0
1
x
mov.f32




0
0
1
0
x
x
x
x
1
0
x
mov.f32




0
0
1
0
x
x
0
0
1
1
x
kill




0
0
1
0
x
x
0
1
1
1
x
!p0 kill




0
0
1
0
x
x
1
0
1
1
x
!p1 kill




0
0
1
0
x
x
1
1
1
1
x
p0 kill









predicate
modifier1
sub_pred
5
4
3
value




0
0
1
1
x
x
0
0
x
invalid




0
0
1
1
x
x
0
1
x
invalid




0
0
1
1
x
x
1
0
x
mov.f32




0
0
1
1
0
0
1
1
x
kill




0
0
1
1
0
1
1
1
x
!p0 kill




0
0
1
1
1
0
1
1
x
!p1 kill




0
0
1
1
1
1
1
1
x
p0 kill





Examples:





predicate 010


Instructions: 

Encoding:













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
0
1
0









7
6
5
4
3
2
1
0




modifier1
opcode2
opcode4











x
x




modifier1
opcode2










x
x
x









7
6
5
4
3
2
1
0





opcode5
opcode6




x
x
x










modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2













predicate
modifier1
opcode3
modifier2
5
4
3
value




0
1
0
0
0
0
0
0
0
0
p1 ba




0
1
0
0
0
1
0
0
0
0
p1 mov




0
1
0
0
0
0
1
0
0
0
p1 ba.savelink




0
1
0
0
0
1
1
0
0
0
p1 mov




0
1
0
0
0
0
x
0
0
1
mov.f32




0
1
0
0
0
1
x
0
0
1
p1	mov




0
1
0
0
0
x
x
0
1
x
mov.f32




0
1
0
0
0
x
x
1
0
x
mov.f32




0
1
0
0
0
x
x
1
1
x
invalid











predicate
modifier1
opcode4
opcode5
opcode6
5
4
3
value




0
1
0
0
1
0
x
x
x
x
x
0
0
x
mov.f32




0
1
0
0
1
1
0
x
0
0
x
0
0
x
mov.f32




0
1
0
0
1
1
0
x
0
1
0
0
0
x
mov.f32




0
1
0
0
1
1
0
x
0
1
1
0
0
x
invalid




0
1
0
0
1
1
0
x
1
0
x
0
0
x
invalid




0
1
0
0
1
1
0
x
1
1
0
0
0
x
invalid




0
1
0
0
1
1
0
x
1
1
1
0
0
x
mov.f32




0
1
0
0
1
1
1
0
0
0
x
0
0
x
mov.f32




0
1
0
0
1
1
1
0
0
1
0
0
0
x
mov.f32




0
1
0
0
1
1
1
0
0
1
1
0
0
x
invalid




0
1
0
0
1
1
1
0
1
0
x
0
0
x
invalid




0
1
0
0
1
1
1
0
1
1
0
0
0
x
invalid




0
1
0
0
1
1
1
0
1
1
1
0
0
x
mov.f32




0
1
0
0
1
1
1
1
x
x
x
0
0
x
invalid




0
1
0
0
1
x
x
x
x
x
x
0
1
x
invalid




0
1
0
0
1
x
x
x
x
x
x
1
0
x
mov.f32




0
1
0
0
1
x
x
x
x
x
x
1
1
x
invalid

















predicate
modifier1
opcode3
modifier2
5
4
3
value




0
1
0
1
0
0
0
0
0
0
p1 ba




0
1
0
1
0
1
0
0
0
0
p1 mov




0
1
0
1
0
0
1
0
0
0
p1 ba.savelink




0
1
0
1
0
1
1
0
0
0
p1 mov




0
1
0
1
0
0
x
0
0
1
mov.f32




0
1
0
1
0
1
x
0
0
1
p1	mov




0
1
0
1
0
x
x
0
1
x
mov.f32




0
1
0
1
0
x
x
1
0
x
mov.f32




0
1
0
1
0
x
x
1
1
x
invalid











predicate
modifier1
5
4
3
value




0
1
0
1
1
0
0
x
mov.f32




0
1
0
1
1
0
1
x
invalid




0
1
0
1
1
1
0
x
mov.f32




0
1
0
1
1
1
1
x
invalid







Examples:





predicate 011


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
0
1
1









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





sub_pred





x
x
x
x
x


x




opcode4
opcode5

modifier2
opcode3








x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2













predicate
modifier1
opcode3
modifier2
opcode4
opcode5
sub_pred
5
4
3
value




0
1
1
0
0
0
x
x
x
x
x
x
0
0
0
p2 ba




0
1
1
0
1
0
x
x
x
x
x
x
0
0
0
p2 mov




0
1
1
0
0
1
x
x
x
x
x
x
0
0
0
p2 ba.savelink




0
1
1
0
1
1
x
x
x
x
x
x
0
0
0
p2 mov




0
1
1
0
0
x
x
x
x
x
x
x
0
0
1
mov.f32




0
1
1
0
1
x
x
x
x
x
x
x
0
0
1
p2 mov




0
1
1
0
x
x
x
x
x
x
x
x
0
1
x
mov.f32




0
1
1
0
x
x
0
0
0
x
x
x
1
0
x
mov.f32




0
1
1
0
x
x
0
0
1
x
x
x
1
0
x
mov.f32




0
1
1
0
x
x
0
1
0
x
x
x
1
0
x
mov.f32




0
1
1
0
x
x
0
1
1
0
x
x
1
0
x
mov.f32




0
1
1
0
x
x
0
1
1
1
x
x
1
0
x
invalid




0
1
1
0
x
x
1
0
0
x
x
x
1
0
x
mov.f32




0
1
1
0
x
x
1
0
1
x
x
x
1
0
x
mov.f32




0
1
1
0
x
x
1
1
0
x
x
x
1
0
x
invalid




0
1
1
0
x
x
1
1
1
x
x
x
1
0
x
invalid




0
1
1
0
x
x
x
x
x
x
0
0
1
1
x
depthf




0
1
1
0
x
x
x
x
x
x
0
1
1
1
x
p0 depthf




0
1
1
0
x
x
x
x
x
x
1
0
1
1
x
p1 depthf




0
1
1
0
x
x
x
x
x
x
1
1
1
1
x
!p0 depthf











predicate
modifier1
opcode4
opcode5
sub_pred
5
4
3
value




0
1
1
1
x
x
x
x
x
x
0
0
x
invalid




0
1
1
1
x
x
x
x
x
x
0
1
x
invalid




0
1
1
1
0
0
0
x
x
x
1
0
x
mov.f32




0
1
1
1
0
0
1
x
x
x
1
0
x
mov.f32




0
1
1
1
0
1
0
x
x
x
1
0
x
mov.f32




0
1
1
1
0
1
1
0
x
x
1
0
x
mov.f32




0
1
1
1
0
1
1
1
x
x
1
0
x
invalid




0
1
1
1
1
0
0
x
x
x
1
0
x
mov.f32




0
1
1
1
1
0
1
x
x
x
1
0
x
mov.f32




0
1
1
1
1
1
0
x
x
x
1
0
x
invalid




0
1
1
1
1
1
1
x
x
x
1
0
x
invalid




0
1
1
1
x
x
x
x
0
0
1
1
x
depthf




0
1
1
1
x
x
x
x
0
1
1
1
x
p0 depthf




0
1
1
1
x
x
x
x
1
0
1
1
x
p1 depthf




0
1
1
1
x
x
x
x
1
1
1
1
x
!p0 depthf







Examples:





predicate 100


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
1
0
0









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





sub_pred





x
x
x
x



x





modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2:













predicate
modifier1
opcode3
modifier2
sub_pred
5
4
3
value




1
0
0
0
0
0
x
x
x
0
0
0
p3 ba




1
0
0
0
1
0
x
x
x
0
0
0
p3 mov




1
0
0
0
0
1
x
x
x
0
0
0
p3 ba.savelink




1
0
0
0
1
1
x
x
x
0
0
0
p3 mov




1
0
0
0
0
x
x
x
x
0
0
1
mov.f32




1
0
0
0
1
x
x
x
x
0
0
1
p3 mov




1
0
0
0
x
x
x
x
x
0
1
x
mov.f32




1
0
0
0
x
x
0
0
0
1
0
x
mov.u32




1
0
0
0
x
x
0
0
1
1
0
x
p0 mov.u32




1
0
0
0
x
x
0
1
0
1
0
x
p1 mov.u32




1
0
0
0
x
x
0
1
1
1
0
x
p2 mov.u32




1
0
0
0
x
x
1
0
0
1
0
x
p3 mov.u32




1
0
0
0
x
x
1
0
1
1
0
x
!p0 mov.u32




1
0
0
0
x
x
1
1
0
1
0
x
!p1 mov.u32




1
0
0
0
x
x
1
1
1
1
0
x
Pn mov.u32




1
0
0
0
x
x
x
x
x
1
1
x
invalid











predicate
modifier1
sub_pred
5
4
3
value




1
0
0
1
x
x
x
0
0
x
invalid




1
0
0
1
x
x
x
0
1
x
invalid




1
0
0
1
0
0
0
1
0
x
mov.u32




1
0
0
1
0
0
1
1
0
x
p0 mov.u32




1
0
0
1
0
1
0
1
0
x
p1 mov.u32




1
0
0
1
0
1
1
1
0
x
p2 mov.u32




1
0
0
1
1
0
0
1
0
x
p3 mov.u32




1
0
0
1
1
0
1
1
0
x
!p0 mov.u32




1
0
0
1
1
1
0
1
0
x
!p1 mov.u32




1
0
0
1
1
1
1
1
0
x
Pn mov.u32




1
0
0
1
x
x
x
1
1
x
invalid







Examples:





predicate 101


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
1
0
1









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2:













predicate
modifier1
opcode3
modifier2
5
4
3
value




1
0
1
0
0
0
0
0
0
!p0 ba




1
0
1
0
1
0
0
0
0
!p0 mov




1
0
1
0
0
1
0
0
0
!p0 ba.savelink




1
0
1
0
1
1
0
0
0
!p0 mov




1
0
1
0
0
x
0
0
1
mov.f32




1
0
1
0
1
x
0
0
1
!p0 mov




1
0
1
0
x
x
0
1
x
mov.f32




1
0
1
0
x
x
1
0
x
mov.f32




1
0
1
0
x
x
1
1
x
invalid











predicate
modifier1
5
4
3
value




1
0
1
1
0
0
x
invalid




1
0
1
1
0
1
x
invalid




1
0
1
1
1
0
x
mov.f32




1
0
1
1
1
1
x
invalid







Examples:





predicate 110


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
1
1
0









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2:













predicate
modifier1
opcode3
modifier2
5
4
3
value




1
1
0
0
0
0
0
0
0
!p1 ba




1
1
0
0
1
0
0
0
0
!p1 mov




1
1
0
0
0
1
0
0
0
!p1 ba.savelink




1
1
0
0
1
1
0
0
0
!p1 mov




1
1
0
0
0
x
0
0
1
mov.f32




1
1
0
0
1
x
0
0
1
!p1 mov




1
1
0
0
x
x
0
1
x
invalid




1
1
0
0
x
x
1
0
x
mov.f32




1
1
0
0
x
x
1
1
x
invalid











predicate
modifier1
5
4
3
value




1
1
0
1
0
0
x
invalid




1
1
0
1
0
1
x
invalid




1
1
0
1
1
0
x
mov.f32




1
1
0
1
1
1
x
invalid







Examples:





predicate 111


Instructions: 

Encoding













7
6
5
4
3
2
1
0




opcode1
predicate




1
1
1
1
1
1
1
1









7
6
5
4
3
2
1
0





modifier1
opcode2





x




x
x
x









7
6
5
4
3
2
1
0





modifier2
opcode3




x
x
x
x
x
x











7
6
5
4
3
2
1
0
















?
?
?
?
?
?
?
?





Notes:

predicate does not apply to all instructions

Fields

opcode2:













predicate
modifier1
opcode3
modifier2
5
4
3
value




1
1
1
0
0
0
0
0
0
Pn ba




1
1
1
0
1
0
0
0
0
Pn mov




1
1
1
0
0
1
0
0
0
Pn ba.savelink




1
1
1
0
1
1
0
0
0
Pn mov




1
1
1
0
0
x
0
0
1
mov.f32




1
1
1
0
1
x
0
0
1
Pn mov




1
1
1
0
x
x
0
1
x
invalid




1
1
1
0
x
x
1
0
x
mov.f32




1
1
1
0
x
x
1
1
x
invalid











predicate
modifier1
5
4
3
value




1
1
1
1
0
0
x
invalid




1
1
1
1
0
1
x
invalid




1
1
1
1
1
0
x
mov.f32




1
1
1
1
1
1
x
invalid







Examples:











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