An instance of Operation defines an operation in the instruction set and includes operation ASL pseudocode that is used by one or more instructions.
If an Operation is referred to by more than one instruction, it may contain decode ASL pseudocode, which defines the shared decode for all of those instructions.
| Properties | Type | Description |
|---|---|---|
| _meta | Meta |
Metadata
See
Meta
for more information.
|
| _type |
|
|
| brief◊ | OperationAbstract |
See
definitions.brief in
OperationAbstract
for more information.
|
| decode | Text |
Shared decode. null when no shared decode applies.
See
Text
for more information.
|
| description◊ | OperationAbstract |
See
definitions.description in
OperationAbstract
for more information.
|
| operation◊ | Text |
ASL code describing the operation of one or more instructions.
See
Text
for more information.
|
| title◊ | OperationAbstract |
See
definitions.title in
OperationAbstract
for more information.
|
|
||
|
||
{
"_type": "Instruction.Operation",
"operation": [
[
"bits(datasize) result;",
"bits(datasize) operand1 = X[n, datasize];",
"bits(datasize) operand2 = X[m, datasize];",
"bits(4) nzcv;",
"if sub_op then",
" operand2 = NOT(operand2);",
"(result, nzcv) = AddWithCarry(operand1, operand2, PSTATE.C);",
"if setflags then",
" PSTATE.<N,Z,C,V> = nzcv;",
"X[d, datasize] = result;"
]
],
"decode": [
[
"integer d = UInt(Rd);",
"integer n = UInt(Rn);",
"integer m = UInt(Rm);",
"integer datasize = if sf == '1' then 64 else 32;",
"boolean sub_op = (op == '1');",
"boolean setflags = (S == '1');"
]
],
"description": "Subtract with Carry subtracts a register value and the value of NOT (Carry flag) from a register value, and writes the result to the destination register.",
"brief": "SBC",
"title": "SBC"
}{
"type": "object",
"info": [
[
"An instance of $(~Instruction.Operation) defines an operation in the instruction set and",
"includes operation ASL pseudocode that is used by one or more instructions."
],
[
"If an $(~Instruction.Operation) is referred to by more than one instruction, it may contain",
"decode ASL pseudocode, which defines the shared decode for all of those instructions."
]
],
"properties": {
"_meta": {
"$ref": "../Meta.json",
"info": [
"Metadata"
]
},
"_type": {
"enum": [
"Instruction.Operation"
]
},
"operation": {
"info": [
"ASL code describing the operation of one or more instructions."
],
"$ref": "../Text.json"
},
"decode": {
"info": [
"Shared decode. null when no shared decode applies."
],
"$ref": "../Text.json"
},
"description": {
"$ref": "OperationAbstract.json#/definitions/description"
},
"brief": {
"$ref": "OperationAbstract.json#/definitions/brief"
},
"title": {
"$ref": "OperationAbstract.json#/definitions/title"
}
},
"required": [
"operation",
"brief",
"title",
"description"
],
"additionalProperties": false,
"examples": [
{
"_type": "Instruction.Operation",
"operation": [
[
"bits(datasize) result;",
"bits(datasize) operand1 = X[n, datasize];",
"bits(datasize) operand2 = X[m, datasize];",
"bits(4) nzcv;",
"if sub_op then",
" operand2 = NOT(operand2);",
"(result, nzcv) = AddWithCarry(operand1, operand2, PSTATE.C);",
"if setflags then",
" PSTATE. = nzcv;",
"X[d, datasize] = result;"
]
],
"decode": [
[
"integer d = UInt(Rd);",
"integer n = UInt(Rn);",
"integer m = UInt(Rm);",
"integer datasize = if sf == '1' then 64 else 32;",
"boolean sub_op = (op == '1');",
"boolean setflags = (S == '1');"
]
],
"description": "Subtract with Carry subtracts a register value and the value of NOT (Carry flag) from a register value, and writes the result to the destination register.",
"brief": "SBC",
"title": "SBC"
}
],
"$schema": "http://json-schema.org/draft-04/schema#",
"title": "Instruction.Operation"
}