本文整理匯總了Golang中cmd/internal/obj.Addr.Reg2方法的典型用法代碼示例。如果您正苦於以下問題：Golang Addr.Reg2方法的具體用法？Golang Addr.Reg2怎麽用？Golang Addr.Reg2使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類cmd/internal/obj.Addr的用法示例。
在下文中一共展示了Addr.Reg2方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: operand
// operand parses a general operand and stores the result in *a.
func (p *Parser) operand(a *obj.Addr) bool {
//fmt.Printf("Operand: %v\n", p.input)
if len(p.input) == 0 {
p.errorf("empty operand: cannot happen")
return false
}
// General address (with a few exceptions) looks like
// $sym±offset(SB)(reg)(index*scale)
// Exceptions are:
//
// R1
// offset
// $offset
// Every piece is optional, so we scan left to right and what
// we discover tells us where we are.
// Prefix: $.
var prefix rune
switch tok := p.peek(); tok {
case '$', '*':
prefix = rune(tok)
p.next()
}
// Symbol: sym±offset(SB)
tok := p.next()
name := tok.String()
if tok.ScanToken == scanner.Ident && !p.atStartOfRegister(name) {
// We have a symbol. Parse $sym±offset(symkind)
p.symbolReference(a, name, prefix)
// fmt.Printf("SYM %s\n", obj.Dconv(&emptyProg, 0, a))
if p.peek() == scanner.EOF {
return true
}
}
// Special register list syntax for arm: [R1,R3-R7]
if tok.ScanToken == '[' {
if prefix != 0 {
p.errorf("illegal use of register list")
}
p.registerList(a)
p.expect(scanner.EOF)
return true
}
// Register: R1
if tok.ScanToken == scanner.Ident && p.atStartOfRegister(name) {
if p.atRegisterShift() {
// ARM shifted register such as R1<<R2 or R1>>2.
a.Type = obj.TYPE_SHIFT
a.Offset = p.registerShift(tok.String(), prefix)
if p.peek() == '(' {
// Can only be a literal register here.
p.next()
tok := p.next()
name := tok.String()
if !p.atStartOfRegister(name) {
p.errorf("expected register; found %s", name)
}
a.Reg, _ = p.registerReference(name)
p.get(')')
}
} else if r1, r2, scale, ok := p.register(tok.String(), prefix); ok {
if scale != 0 {
p.errorf("expected simple register reference")
}
a.Type = obj.TYPE_REG
a.Reg = r1
if r2 != 0 {
// Form is R1:R2. It is on RHS and the second register
// needs to go into the LHS. This is a horrible hack. TODO.
// TODO: If we never see this again, can delete Addr.Reg2.
panic("cannot happen")
a.Reg2 = r2
}
}
// fmt.Printf("REG %s\n", obj.Dconv(&emptyProg, 0, a))
p.expect(scanner.EOF)
return true
}
// Constant.
haveConstant := false
switch tok.ScanToken {
case scanner.Int, scanner.Float, scanner.String, scanner.Char, '+', '-', '~':
haveConstant = true
case '(':
// Could be parenthesized expression or (R).
rname := p.next().String()
p.back()
haveConstant = !p.atStartOfRegister(rname)
if !haveConstant {
p.back() // Put back the '('.
}
}
if haveConstant {
p.back()
if p.have(scanner.Float) {
//.........這裏部分代碼省略.........