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// Copyright 2017 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 arm64asm
import (
"strings"
)
// GNUSyntax returns the GNU assembler syntax for the instruction, as defined by GNU binutils.
// This form typically matches the syntax defined in the ARM Reference Manual.
func GNUSyntax(inst Inst) string {
switch inst.Op {
case RET:
if r, ok := inst.Args[0].(Reg); ok && r == X30 {
return "ret"
}
case B:
if _, ok := inst.Args[0].(Cond); ok {
return strings.ToLower("b." + inst.Args[0].String() + " " + inst.Args[1].String())
}
case SYSL:
result := strings.ToLower(inst.String())
return strings.Replace(result, "c", "C", -1)
case DCPS1, DCPS2, DCPS3, CLREX:
return strings.ToLower(strings.TrimSpace(inst.String()))
case ISB:
if strings.Contains(inst.String(), "SY") {
result := strings.TrimSuffix(inst.String(), " SY")
return strings.ToLower(result)
}
}
return strings.ToLower(inst.String())
}
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