SGX543

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:

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

Notation is the following:

For example:

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.

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.

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.

When index mode is used - there has to be another field that encodes index expression with  Register Index Offset Selector RIOS6 

The way that index expression is buit:

Example:

Register R6
This encoding uses 6 bits to encode register index.

Index is calculated as: value * 2

Specific type of register can be selected with Register Selector RS2

For destination operand op0 specific type of register can be selected with Register Indexable RI2 

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

Register Index Offset Selector IOS6
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:

{|
 * - style="vertical-align:top;"


 * }
 * }
 * }
 * }
 * }
 * }

Notes:

x bits do not affect instruction being selected. however might affect addressing mode, operands or something else.

Fields (instruction):

Fields (operands):

Examples:

0x08000000 - 0x10000000
Instructions: mul.f32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x10000000 - 0x18000000
Instructions: mul.f16

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x18000000 - 0x20000000
Instructions: dot.f32, mad.f32

Encoding:

Fields:

Examples:

0x20000000 - 0x28000000
Instructions: dot, mov, rsq, rcp, exp, log

Encoding:

Notes:

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

Fields:

opcode2 (depends on op_sel):

Examples:

0x28000000 - 0x30000000
Instructions: dot, mov, rsq, rcp

Encoding:

Notes:

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

Fields:

opcode2:

Examples:

0x30000000 - 0x38000000
Instructions: rcp, rsq, log, exp

Encoding:

Notes:

should be omitted if  matches.

Fields:

Examples:

0x38000000 - 0x40000000
Instructions: mov, cmov, cmov8

Encoding:

Notes:

is only applicable to  and   since this is conditional move.

Fields:

Examples:

0x40000000 - 0x48000000
Instructions: pack, (mov)

Encoding:

Notes:

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

furthermore instruction mnemonic shall be replaced to

Fields:

Examples:

0x48000000 - 0x50000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0x50000000 - 0x58000000
Instructions: and.u32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x58000000 - 0x60000000
Instructions: xor.u32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x60000000 - 0x68000000
Instructions: shl.u32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x68000000 - 0x70000000
Instructions: shr.u32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x70000000 - 0x78000000
Instructions: rlp.u32

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x78000000 - 0x80000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0x80000000 - 0x88000000
Instructions: add.fx8

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

Fields:

predicate:

Examples:

0x88000000 - 0x90000000
Instructions: add.fx8, sub.fx8

Encoding:

Notes:

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

Fields:

Examples:

0x90000000 - 0x98000000
Instructions: add.fx8, sub.fx8, min.fx8, max.fx8

Encoding:

Notes:

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

Fields:

Examples:

0x98000000 - 0xA0000000
Instructions: mad.u8

Encoding:

Fields:

Examples:

0xA0000000 - 0xA8000000
Instructions: mad

Encoding:

Fields:

Examples:

0xA8000000 - 0xB0000000
Instructions: mad

Encoding:

Fields:

Examples:

0xB0000000 - 0xB8000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0xB8000000 - 0xC0000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0xC0000000 - 0xC8000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0xC8000000 - 0xD0000000
Instructions: mad.u8

Encoding:

Fields:

Examples:

0xD0000000 - 0xD8000000
Instructions: mad

Encoding:

Notes:

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

Fields:

Examples:

0xD8000000 - 0xE0000000
Instructions: this group only contains illegal instructions

Encoding:

{|
 * - style="vertical-align:top;"


 * }
 * }

0xE0000000 - 0xE8000000
Instructions: tex

Encoding:

Fields:

Examples:

0xE8000000 - 0xF0000000
Instructions: lda32, ldl32, ldt32

Encoding:

Notes:

is only applicable when  modifier is specified

Fields:

Examples:

0xF0000000 - 0xF8000000
Instructions: sta32, stl32, stt32

Encoding:

Notes:

is only applicable when  modifier is specified

Fields:

Examples:

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:

Fields:

opcode2:

Examples:

predicate 001
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2:

Examples:

predicate 010
Instructions:

Encoding:

Notes:

predicate does not apply to all instructions

Fields

opcode2

Examples:

predicate 011
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2

Examples:

predicate 100
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2:

Examples:

predicate 101
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2:

Examples:

predicate 110
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2:

Examples:

predicate 111
Instructions:

Encoding

Notes:

predicate does not apply to all instructions

Fields

opcode2:

Examples: