wantInverted: []sparseEntry{{0, 1000}, {5000, 0}},
	}, {
		in: []sparseEntry{{0, 3000}}, size: 5000,
		wantValid:    true,
		wantAligned:  []sparseEntry{{0, 2560}},
		wantInverted: []sparseEntry{{3000, 2000}},
	}, {
		in: []sparseEntry{{3000, 2000}}, size: 5000,
		wantValid:    true,
		wantAligned:  []sparseEntry{{3072, 1928}},
		wantInverted: []sparseEntry{{0, 3000}, {5000, 0}},
	}, {

			// Argsize set below.
		},
	}
	nameAddr.Sym.Func().Text = prog
	prog.To.Val = int32(argSize)
	p.append(prog, "", true)
}

// asmData assembles a DATA pseudo-op.
// DATA masks<>+0x00(SB)/4, $0x00000000
func (p *Parser) asmData(operands [][]lex.Token) {
	if len(operands) != 2 {
		p.errorf("expect two operands for DATA")
		return
	}

	// Operand 0 has the general form foo<>+0x04(SB)/4.
	op := operands[0]