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regs.go
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regs.go
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/*
* Copyright 2022 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package hir
import (
`fmt`
)
type Register interface {
fmt.Stringer
Z() bool
A() uint8
}
type (
GenericRegister uint8
PointerRegister uint8
)
const (
ArgMask = 0x7f
ArgGeneric = 0x00
ArgPointer = 0x80
)
const (
R0 GenericRegister = iota
R1
R2
R3
R4
Rz
)
const (
P0 PointerRegister = iota
P1
P2
P3
P4
P5
Pn
)
var GenericRegisters = map[GenericRegister]string {
R0: "r0",
R1: "r1",
R2: "r2",
R3: "r3",
R4: "r4",
Rz: "z",
}
var PointerRegisters = map[PointerRegister]string {
P0: "p0",
P1: "p1",
P2: "p2",
P3: "p3",
P4: "p4",
P5: "p5",
Pn: "nil",
}
func (self GenericRegister) Z() bool { return self == Rz }
func (self PointerRegister) Z() bool { return self == Pn }
func (self GenericRegister) A() uint8 { return uint8(self) | ArgGeneric }
func (self PointerRegister) A() uint8 { return uint8(self) | ArgPointer }
func (self GenericRegister) String() string {
if v := GenericRegisters[self]; v == "" {
panic(fmt.Sprintf("invalid generic register: 0x%02x", uint8(self)))
} else {
return v
}
}
func (self PointerRegister) String() string {
if v := PointerRegisters[self]; v == "" {
panic(fmt.Sprintf("invalid pointer register: 0x%02x", uint8(self)))
} else {
return v
}
}