Add gops agent

vendor/golang.org/x/arch/ppc64/ppc64asm/inst.go

@@ -0,0 +1,344 @@
+// Copyright 2014 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ppc64asm
+
+import (
+	"bytes"
+	"fmt"
+)
+
+type Inst struct {
+	Op   Op     // Opcode mnemonic
+	Enc  uint32 // Raw encoding bits
+	Len  int    // Length of encoding in bytes.
+	Args Args   // Instruction arguments, in Power ISA manual order.
+}
+
+func (i Inst) String() string {
+	var buf bytes.Buffer
+	buf.WriteString(i.Op.String())
+	for j, arg := range i.Args {
+		if arg == nil {
+			break
+		}
+		if j == 0 {
+			buf.WriteString(" ")
+		} else {
+			buf.WriteString(", ")
+		}
+		buf.WriteString(arg.String())
+	}
+	return buf.String()
+}
+
+// An Op is an instruction operation.
+type Op uint16
+
+func (o Op) String() string {
+	if int(o) >= len(opstr) || opstr[o] == "" {
+		return fmt.Sprintf("Op(%d)", int(o))
+	}
+	return opstr[o]
+}
+
+// An Arg is a single instruction argument, one of these types: Reg, CondReg, SpReg, Imm, PCRel, Label, or Offset.
+type Arg interface {
+	IsArg()
+	String() string
+}
+
+// An Args holds the instruction arguments.
+// If an instruction has fewer than 4 arguments,
+// the final elements in the array are nil.
+type Args [5]Arg
+
+// A Reg is a single register. The zero value means R0, not the absence of a register.
+// It also includes special registers.
+type Reg uint16
+
+const (
+	_ Reg = iota
+	R0
+	R1
+	R2
+	R3
+	R4
+	R5
+	R6
+	R7
+	R8
+	R9
+	R10
+	R11
+	R12
+	R13
+	R14
+	R15
+	R16
+	R17
+	R18
+	R19
+	R20
+	R21
+	R22
+	R23
+	R24
+	R25
+	R26
+	R27
+	R28
+	R29
+	R30
+	R31
+	F0
+	F1
+	F2
+	F3
+	F4
+	F5
+	F6
+	F7
+	F8
+	F9
+	F10
+	F11
+	F12
+	F13
+	F14
+	F15
+	F16
+	F17
+	F18
+	F19
+	F20
+	F21
+	F22
+	F23
+	F24
+	F25
+	F26
+	F27
+	F28
+	F29
+	F30
+	F31
+	V0 // VSX extension, F0 is V0[0:63].
+	V1
+	V2
+	V3
+	V4
+	V5
+	V6
+	V7
+	V8
+	V9
+	V10
+	V11
+	V12
+	V13
+	V14
+	V15
+	V16
+	V17
+	V18
+	V19
+	V20
+	V21
+	V22
+	V23
+	V24
+	V25
+	V26
+	V27
+	V28
+	V29
+	V30
+	V31
+	VS0
+	VS1
+	VS2
+	VS3
+	VS4
+	VS5
+	VS6
+	VS7
+	VS8
+	VS9
+	VS10
+	VS11
+	VS12
+	VS13
+	VS14
+	VS15
+	VS16
+	VS17
+	VS18
+	VS19
+	VS20
+	VS21
+	VS22
+	VS23
+	VS24
+	VS25
+	VS26
+	VS27
+	VS28
+	VS29
+	VS30
+	VS31
+	VS32
+	VS33
+	VS34
+	VS35
+	VS36
+	VS37
+	VS38
+	VS39
+	VS40
+	VS41
+	VS42
+	VS43
+	VS44
+	VS45
+	VS46
+	VS47
+	VS48
+	VS49
+	VS50
+	VS51
+	VS52
+	VS53
+	VS54
+	VS55
+	VS56
+	VS57
+	VS58
+	VS59
+	VS60
+	VS61
+	VS62
+	VS63
+)
+
+func (Reg) IsArg() {}
+func (r Reg) String() string {
+	switch {
+	case R0 <= r && r <= R31:
+		return fmt.Sprintf("r%d", int(r-R0))
+	case F0 <= r && r <= F31:
+		return fmt.Sprintf("f%d", int(r-F0))
+	case V0 <= r && r <= V31:
+		return fmt.Sprintf("v%d", int(r-V0))
+	case VS0 <= r && r <= VS63:
+		return fmt.Sprintf("vs%d", int(r-VS0))
+	default:
+		return fmt.Sprintf("Reg(%d)", int(r))
+	}
+}
+
+// CondReg is a bit or field in the conditon register.
+type CondReg int8
+
+const (
+	_ CondReg = iota
+	// Condition Regster bits
+	Cond0LT
+	Cond0GT
+	Cond0EQ
+	Cond0SO
+	Cond1LT
+	Cond1GT
+	Cond1EQ
+	Cond1SO
+	Cond2LT
+	Cond2GT
+	Cond2EQ
+	Cond2SO
+	Cond3LT
+	Cond3GT
+	Cond3EQ
+	Cond3SO
+	Cond4LT
+	Cond4GT
+	Cond4EQ
+	Cond4SO
+	Cond5LT
+	Cond5GT
+	Cond5EQ
+	Cond5SO
+	Cond6LT
+	Cond6GT
+	Cond6EQ
+	Cond6SO
+	Cond7LT
+	Cond7GT
+	Cond7EQ
+	Cond7SO
+	// Condition Register Fields
+	CR0
+	CR1
+	CR2
+	CR3
+	CR4
+	CR5
+	CR6
+	CR7
+)
+
+func (CondReg) IsArg() {}
+func (c CondReg) String() string {
+	switch {
+	default:
+		return fmt.Sprintf("CondReg(%d)", int(c))
+	case c >= CR0:
+		return fmt.Sprintf("CR%d", int(c-CR0))
+	case c >= Cond0LT && c < CR0:
+		return fmt.Sprintf("Cond%d%s", int((c-Cond0LT)/4), [4]string{"LT", "GT", "EQ", "SO"}[(c-Cond0LT)%4])
+	}
+}
+
+// SpReg is a special register, its meaning depends on Op.
+type SpReg uint16
+
+const (
+	SpRegZero SpReg = 0
+)
+
+func (SpReg) IsArg() {}
+func (s SpReg) String() string {
+	return fmt.Sprintf("SpReg(%d)", int(s))
+}
+
+// PCRel is a PC-relative offset, used only in branch instructions.
+type PCRel int32
+
+func (PCRel) IsArg() {}
+func (r PCRel) String() string {
+	return fmt.Sprintf("PC%+#x", int32(r))
+}
+
+// A Label is a code (text) address, used only in absolute branch instructions.
+type Label uint32
+
+func (Label) IsArg() {}
+func (l Label) String() string {
+	return fmt.Sprintf("%#x", uint32(l))
+}
+
+// Imm represents an immediate number.
+type Imm int32
+
+func (Imm) IsArg() {}
+func (i Imm) String() string {
+	return fmt.Sprintf("%d", int32(i))
+}
+
+// Offset represents a memory offset immediate.
+type Offset int32
+
+func (Offset) IsArg() {}
+func (o Offset) String() string {
+	return fmt.Sprintf("%+d", int32(o))
+}