📄 chap.3.assemblylang.ps
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1244(saw:)X7 f2304 3155(......)N1728 3267(1100)N2304(ADD)X2880(D1,D0)X2304 3379(......)N2304 3491(BLE)N2880(1100)X1 f576 3651(which)N842(indicated)X1227(that)X1404(if)X1495(the)X1645(`LE')X1859(condition)X2255(held,)X2477(then)X2675(a)X2750(branch)X3044(was)X3225(to)X3332(occur)X3578(to)X3685(the)X3835(line)X4012(labeled)X576 3763(`1100'.)N912(Later,)X1172(we)X1316(will)X1498(see)X1653(that)X1830(address)X2150(labels)X2407(like)X2584(`1100')X2871(cannot)X3159(be)X3281(selected)X3623(at)X3724(random.)X4073(How-)X576 3875(ever,)N790(if)X873(we)X1009(simply)X1295(think)X1517(of)X1621(them)X1838(as)X1942(symbolic)X2319(labels,)X2592(we)X2728(will)X2902(be)X3017(\256ne)X3185(for)X3321(now.)X3 f576 4099(3.5.)N768(Some)X1016(Notation)X1 f776 4239(When)N1031(writing)X1335(programs)X1724(at)X1820(the)X1964(level)X2178(we)X2316(are,)X2484(it)X2564(is)X2654(necessary)X3054(to)X3155(make)X3390(very)X3587(clear)X3801(what)X4014(base)X4211(of)X576 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f826(.)X874(A)X967(byte)X1157(is)X1245(8-bits)X1488(long,)X1707(a)X1774(word)X1995(is)X2083(16)X2203(bits,)X2390(and)X2553(a)X2620(longword)X3012(is)X3100(32)X3220(bits.)X28 p%%Page: 28 1112 s 0 xH 0 xS 1 f3 f576 400(57:017)N872(CIE)X1 f2329(-)X2385(28)X2505(-)X3 f3717(Lecture)X4062(Notes)X1 f10 s2592 1503 MXY0 518 Dl1036 0 Dl0 -388 Dl2592 1244 MXY1036 0 Dl2592 1892 MXY1036 0 Dl2592 1373 MXY0 -388 Dl1036 0 Dl0 518 Dl2592 1114 MXY1036 0 Dl1555 1373 MXY0 -388 Dl518 0 Dl0 518 Dl1555 1114 MXY518 0 Dl1555 1244 MXY0 0 Dl518 0 Dl1555 1892 MXY518 0 Dl1555 1503 MXY0 518 Dl518 0 Dl0 -388 Dl1555 2929 MXY0 -388 Dl2540 MY2073 0 Dl0 518 Dl3188 MY0 0 Dl0 388 Dl3577 MY-2073 0 Dl0 -518 Dl2669 MY2073 0 Dl1555 2799 MXY2073 0 Dl1555 3447 MXY2073 0 Dl1612 2460 MXY-57 14 Dl1612 2489 MXY-57 -14 Dl2079 0 Dl3577 2489 MXY57 -14 Dl3577 2460 MXY57 14 Dl2649 893 MXY-57 14 Dl2649 921 MXY-57 -14 Dl1043 0 Dl3577 921 MXY57 -14 Dl3577 893 MXY57 14 Dl1619 899 MXY-57 14 Dl1619 928 MXY-57 -14 Dl1561 913 MXY518 0 Dl2022 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3982(Figure)N1770(3.11.)X1986(Three)X2256(Separate)X2643(Views)X2912(of)X3016(Memory.)X1 f576 4142(Figure)N853(3.11\(A\))X1180(shows)X1445(a)X1514(memory)X1861(organization)X2369(of)X2 f2475(n)X1 f2549(bytes.)X2802(A)X2897(byte)X3089(is)X3179(the)X3323(smallest)X3665(addressable)X4141(unit)X576 4254(of)N691(memory,)X1071(therefore,)X1478(the)X1631(addresses)X2034(of)X2149(bytes)X2386(are)X2538(simply)X2834(consecutive)X3323(integers.)X3710(Figure)X3995(3.11\(B\))X576 4366(shows)N842(the)X987(same)X2 f1212(quantity)X1 f1556(of)X1664(memory)X2013(as)X2121(\(A\),)X2306(but)X2457(organized)X2865(as)X2973(a)X3044(sequence)X3425(of)X3533(16-bit)X3791(words.)X4077(Since)X576 4478(words)N844(are)X996(each)X1207(two)X1385(bytes)X1622(long,)X1851(the)X2003(total)X2209(number)X2537(of)X2651(words)X2919(is)X3017(half)X3201(that)X3380(of)X3494(the)X3646(number)X3974(of)X4088(bytes)X576 4590(\(i.e.,)N774(n/2)X921(words\).)X1259(Furthermore,)X1788(each)X1989(address)X2301(is)X2389(a)X2456(multiple)X2802(of)X2906(2)X2978(\320)X3099(i.e.)X3242(0,)X3339(2,)X3436(4,)X3533(etc.)X3719(Figure)X3995(3.11\(C\))X576 4702(again)N824(shows)X1102(the)X1259(same)X1496(quantity)X1851(of)X1970(information)X2464(as)X2583(\(A\))X2755(and)X2933(\(B\),)X3123(but)X3284(organized)X3702(as)X3820(32-bit)X4088(long-)X576 4814(words.)N862(Therefore,)X1294(there)X1515(are)X1661(only)X1860(n/4)X2011(longwords,)X2468(and)X2635(each)X2840(has)X2996(an)X3115(address)X3431(which)X3695(is)X3788(a)X3860(multiple)X4211(of)X576 4926(4)N648(\320)X768(0,)X864(4,)X960(8,)X1056(etc.)X29 p%%Page: 29 1212 s 0 xH 0 xS 1 f3 f576 400(57:017)N872(CIE)X1 f2329(-)X2385(29)X2505(-)X3 f3717(Lecture)X4062(Notes)X1 f10 s1396 1762 MXY0 -777 Dl2073 0 Dl3470 MX0 1036 Dl1396 1244 MXY2073 0 Dl1396 2799 MXY2073 0 Dl1454 905 MXY-57 14 Dl1454 934 MXY-57 -14 Dl1396 MX2079 0 Dl3418 934 MXY57 -14 Dl3418 905 MXY57 14 Dl1396 1114 MXY25 0 Dl1448 MX25 0 Dl1501 MX25 0 Dl1553 MX25 0 Dl1606 MX25 0 Dl1659 MX25 0 Dl1711 MX25 0 Dl1763 MX25 0 Dl1816 MX25 0 Dl1868 MX25 0 Dl1921 MX25 0 Dl1974 MX25 0 Dl2026 MX25 0 Dl2079 MX25 0 Dl2131 MX25 0 Dl2183 MX25 0 Dl2236 MX25 0 Dl2289 MX25 0 Dl2341 MX25 0 Dl2394 MX25 0 Dl2446 MX25 0 Dl2498 MX25 0 Dl2551 MX25 0 Dl2604 MX25 0 Dl2656 MX25 0 Dl2709 MX25 0 Dl2761 MX25 0 Dl2814 MX25 0 Dl2866 MX25 0 Dl2918 MX25 0 Dl2971 MX25 0 Dl3024 MX25 0 Dl3076 MX25 0 Dl3129 MX25 0 Dl3181 MX25 0 Dl3233 MX25 0 Dl3286 MX25 0 Dl3339 MX25 0 Dl3391 MX25 0 Dl3444 MX25 0 Dl1396 1373 MXY25 0 Dl1448 MX25 0 Dl1501 MX25 0 Dl1553 MX25 0 Dl1606 MX25 0 Dl1659 MX25 0 Dl1711 MX25 0 Dl1763 MX25 0 Dl1816 MX25 0 Dl1868 MX25 0 Dl1921 MX25 0 Dl1974 MX25 0 Dl2026 MX25 0 Dl2079 MX25 0 Dl2131 MX25 0 Dl2183 MX25 0 Dl2236 MX25 0 Dl2289 MX25 0 Dl2341 MX25 0 Dl2394 MX25 0 Dl2446 MX25 0 Dl2498 MX25 0 Dl2551 MX25 0 Dl2604 MX25 0 Dl2656 MX25 0 Dl2709 MX25 0 Dl2761 MX25 0 Dl2814 MX25 0 Dl2866 MX25 0 Dl2918 MX25 0 Dl2971 MX25 0 Dl3024 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s1351 1889(.)N1415(.)X1479(.)X2375 2027(.)N2439(.)X2503(.)X3411 2157(.)N3475(.)X3539(.)X12 s2316 861(32)N2436(bits)X10 s3508 1143(longword)N3835(0)X3508 1425(longword)N3835(1)X3515 2967(longword)N3842(n/4)X3964(-1)X2860 1075(byte)N3018(1)X1856 1082(byte)N2014(0)X1856 1218(byte)N2014(2)X2854 1212(byte)N3012(3)X1849⌨️ 快捷键说明
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