prog := &obj.Prog{
		Ctxt: p.ctxt,
		As:   obj.APCDATA,
		Pos:  p.pos(),
		From: key,
		To:   value,
	}
	p.append(prog, "", true)
}

// asmPCAlign assembles a PCALIGN pseudo-op.
// PCALIGN $16
func (p *Parser) asmPCAlign(operands [][]lex.Token) {
	if len(operands) != 1 {
		p.errorf("expect one operand for PCALIGN")
		return
	}

	// Operand 0 must be an immediate constant.