724:
In the case of the NOP instruction, the second value in the second byte is the "base" register of a combined base register, displacement register and offset address. If the base register is also 0, the branch is not taken regardless of the value of the displacement register or displacement address.
1780:
to bypass security checks and instead simply return the expected value being checked for. Because most of the instructions in the security check routine will be unused, these would be replaced with NOPs, thus removing the software's security functionality without altering the positioning of
1641:' command is a shell builtin that has similar effect to a "NOP" (a do-nothing operation). It is not technically an NOP, as it changes the special parameter $ ? (exit status of last command) to 0. It may be considered a synonym for the shell builtin 'true', and its exit status is true (0).
720:
In the case of the NOPR instruction, the second value in the second byte is the register to branch on. If register 0 is chosen, no branch occurs regardless of the mask value. Thus, if either of the two values in the second byte is 0, the branch will not happen.
267:, or as a place-holder to be replaced by active instructions later on in program development (or to replace removed instructions when reorganizing would be problematic or time-consuming). In some cases, a NOP can have minor side effects; for example, on the
1405:(note that the last form may be confusing, and as such generates a warning with some compilers or compiler options, as semicolon usually indicates an end of function call instruction when placed after a parenthesis on the end of line).
713:
The NOP ("No-Op") and NOPR ("No-Op
Register") are a subset of the "Branch on Condition" or "Branch on Condition Register" instructions, respectively; both versions have two options for generating a NO-OP.
716:
In the case of both the NOP and NOPR instructions, the first 0 in the second byte is the "mask" value, the condition to test such as equal, not equal, high, low, etc. If the mask is 0, no branch occurs.
1793:, which allows code to execute when the exact value of the instruction pointer is indeterminate (e.g., when a buffer overflow causes a function's return address on the stack to be overwritten).
229:
to execute. In other instruction sets, there is no explicit NOP instruction, but the assembly language mnemonic NOP represents an instruction which acts as a NOP; e.g., on the
1591:. In fact, due to the specification of the language, in a BEGIN / END block, the semicolon is optional before the END statement, thus a semicolon used there is superfluous.
1273:
statement must be used to specify that no action is required. (Thus, if the programmer forgets to write a sequence of statements, the program will fail to compile.)
1731:
Note that unlike the other protocols listed, the IMAP4 NOOP command has a specific purpose—it allows the server to send any pending notifications to the client.
1312:(braces), which does not itself need a following semicolon. Thus in contexts where a statement is grammatically required, some such null statement can be used.
1304:
In some cases, such as the body of a function, a block must be used, but this can be empty. In C, statements cannot be empty—simple statements must end with a
1673:, include a NOP command that a client can issue to request a response from the server without requesting any other actions. Such a command can be used to
784:, meaning: Logically shift register 0 zero bits to the left and store the result in register 0. Writes to register 0 are ignored; it always contains 0.
830:
The * bytes are arbitrary, and can be anything from 0 to the maximum byte (required to be in the range 63-99). MIX uses sign-magnitude representation.
400:
0x66 is the operand-size override prefix. 0x0F 0x1F is a two-byte NOP opcode that takes a ModRM operand upon which no operation is performed; 0x00 is
1432:
statement is used in some contexts such as the last statement in a DO loop, although it can be used anywhere, and does not have any functionality.
1249:
A function or a sequence of programming language statements is a NOP or null statement if it has no effect. Null statements may be required by the
1979:
1611:
1657:
command. It does nothing by itself, but may be used to prevent the immediately preceding command from parsing any subsequent tokens.
1848:
1742:
servers respond to a NOOP command with "OK" or "+OK", some programmers have added quirky responses to the client. For example, the
1315:
The null statement is useless by itself, but it can have a syntactic use in a wider context, e.g., within the context of a loop:
1416:(newline) character, essentially fast-forwarding the current reading location of standard input to the beginning of next line.
152:
1617:
which has no effect when executed and thus serves as a NOP. It is primarily used to ensure correct syntax due to Python's
2210:
2006:
1298:
An empty block (compound statement) is also a NOP, and may be more legible, but will still be ignored by the compiler.
1903:
2068:
2055:
2023:
1954:
1936:
1768:
software that checks for serial numbers, specific hardware or software requirements, presence or absence of hardware
1720:
1923:
1000:
Palindromic NOP - that is, an instruction that executes as NOP regardless of whether byte order is interpreted as
1818:
1753:
1802:
1710:
256:
1695:
1607:
1588:
1237:
From a hardware design point of view, unmapped areas of a bus are often designed to return zeroes; since the
213:
include an instruction whose explicit purpose is to not change the state of any of the programmer-accessible
955:
versions of the 65xx family were converted to be NOPs of varying instruction lengths and cycle times in the
1622:
66:
2241:
1250:
35:
1262:
145:
2246:
1598:
may be used as a placeholder to indicate no action, even if placed inside another BEGIN / END block.
109:
1269:
statement serves as a NOP. As the syntax forbids that control statements or functions be empty, the
639:
1992:
252:
1975:
314:
1700:
1690:
814:
2085:
2236:
1904:"Intel 64 and IA-32 Architectures Software Developer's Manual: Instruction Set Reference A-Z"
1879:
1824:
1808:
1725:
876:
138:
39:
17:
1705:
1666:
893:
660:
618:
584:
272:
198:
194:
43:
1544:
1091:. Only available on RISC-V CPUs that support the "C" (compressed instructions) extension.
1004:. Some PA-RISC system instructions are required to be followed by seven palindromic NOPs.
851:
SWYM stands for "Sympathize with your machinery". The * digits can be chosen arbitrarily.
8:
2163:
2075:) indicating that no statement will be executed, even if JavaScript syntax requires one."
1174:
1034:
921:
264:
126:
214:
121:
30:
This article is about the "No
Operation" computer instruction. For Null statement, see
1805:– annotations generally for programmers that are ignored by compilers and interpreters
1241:
behavior is often desirable, it gives a bias to coding it with the all-zeroes opcode.
2019:
1842:
1830:
1765:
1677:
or that the server is responsive. A NOOP command is part of the following protocols (
764:
260:
190:
2044:
Note that NOP is a special case of the SETHI instruction, with imm22 = 0 and rd = 0.
1444:
language does not have a built-in NOP statement. Many implementations are possible:
697:
551:
166:
2132:
88:
1715:
1096:
210:
114:
948:
693:
689:
685:
681:
543:
268:
218:
76:
1625:
requires an indented block with the class logic, which has to be expressed as
2230:
2029:
2015:
1618:
901:
856:
31:
263:, to render void an existing instruction such as a jump, as a target of an
241:
226:
186:
81:
52:
347:
prefix, making the encoding 0x48 0x90. However, 0x90 is interpreted as a
1813:
605:- Add zero to the stack pointer (No operation). The assembly instruction
363:
222:
1587:
As with C, the ; used by itself can be used as a null statement in
1777:
1441:
1001:
952:
473:
469:
420:
245:
2096:
1790:
1773:
1674:
1540:
1504:
Define a custom NOP function, as in the following example (using the
1238:
956:
710:
0x47000000 or 0x470nnnnn or 0x47n0nnnn where "n" is any 4-bit value.
517:, an instruction that bitwise-ORs the always-0 register with itself.
497:
271:
series of processors, the NOP opcode causes a synchronization of the
288:
1836:
1501:
Use a NOP function available in a third-party library —see below;
1425:
1285:, which is just a semi-colon in a context requiring a statement.
1009:
964:
522:
278:
Listed below are the NOP instruction for some CPU architectures:
2178:
According to The TeXbook, 'TeX does nothing' when it encounters
2133:
Advanced Bash-Scripting Guide > Chapter 3. Special
Characters
2109:
1769:
1735:
1685:
1670:
1572:
1556:
1486:
Alternatives, in situations where a function is required, are:
1146:
1054:
789:
744:
448:
298:
71:
27:
Machine instruction that indicates to a computer to do nothing
1747:
1117:
441:
308:
230:
1644:
1993:
The RISC-V Instruction Set Manual, Volume 1: User-Level ISA
1898:
1896:
1894:
1892:
1292:
statements, which has historical and performance reasons.
1216:
925:
835:
444:
351:
in long mode regardless of whether it is preceded by 0x48.
293:
2186:
may tell TeX, 'This is the end of what you've been doing'.
1494:
built-in function, that accepts any arguments and returns
1482:) when the previous methods are not allowed by the syntax.
579:
which is encoded 0xE1A00000 (little-endian architecture).
251:
A NOP is most commonly used for timing purposes, to force
2162:
Bausum, David (2002). "TeX Primitive
Control Sequences".
1739:
1650:
1505:
1195:
739:
0x0700 or 0x070n or 0x07n0 where "n" is any 4-bit value.
477:
366:
and later Intel processors, and all AMD AMD64 processors
311:
2004:
1889:
1849:
X86 instruction listings#Added in P5/P6-class processors
2198:
1308:(semicolon) while compound statements are enclosed in
2152:
zsh manpage (zshbuiltins) > SHELL BUILTIN COMMANDS
2058:. "The execution of a null_statement has no effect."
1632:
240:
A NOP must not access memory, as that could cause a
1959:
1941:
2084:ECMAScript Language Specification – Edition 5.1 –
2228:
204:
1880:"Motorola 68000 Programmer's Reference Manual"
1833:– the functional programming equivalent to NOP
1653:typographical system's macro language has the
1408:The above code continues calling the function
343:requires two bytes, as it would begin with an
1621:; for example the syntax for definition of a
396:0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
146:
2056:Ada Reference Manual — null statements
1970:
1968:
1579:, which returns undefined and does nothing.
2086:Properties of the Function Prototype Object
1776:. This process is accomplished by altering
2203:
225:. It often takes a well-defined number of
153:
139:
2005:Weaver, D. L.; Germond, T., eds. (1994).
1965:
1845:– a command sometimes used instead of NOP
1645:TeX macro language (ConTeXt, LaTeX, etc.)
2143:bash manpage > SHELL BUILTIN COMMANDS
2008:The SPARC Architecture Manual, Version 9
1874:
1872:
1781:everything which follows in the binary.
1660:
2071:. "The empty statement is a semicolon (
1478:expression as a complete statement (an
1281:The simplest NOP statement in C is the
1253:of some languages in certain contexts.
542:, an instruction that asserts that the
412:, and 0x84 0x00 0x00 0x00 0x00 0x00 is
392:0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
14:
2229:
2161:
1547:function that performs no operations.
1464:
1288:Be aware that most C-compiler ignores
1955:"5.6.3. NOP Thumb pseudo-instruction"
1869:
1789:The NOP opcode can be used to form a
1211:Delay is dependent on processor type
1924:Am29050 Microprocessor User's Manual
1784:
1675:ensure the connection is still alive
1276:
1169:Jump never, set nothing, skip never
1937:"4.8.4. NOP ARM pseudo-instruction"
1750:responds to NOOP with the message:
1137:which zeroes the hardwired-to-zero
24:
1190:Clear none of the condition codes
896:and prevents instruction overlap.
388:0x0F 0x1F 0x80 0x00 0x00 0x00 0x00
331:0x90 is the one-byte encoding for
34:. For Do nothing instruction, see
25:
2258:
1633:Shell scripting (bash, zsh, etc.)
1995:, version 2.2, 7 May 2017, p.79.
1157:JUMP, SETA, SETAI, CAI, TRN, TLN
2191:
2155:
2146:
2137:
2126:
2102:
2090:
2078:
2061:
1112:Move AUX to AUX with no rotate
181:(pronounced "no op"; short for
2049:
1998:
1985:
1978:, 1995, pages 2-21 and 7-103.
1947:
1929:
1916:
1803:Comment (computer programming)
409:, 0x80 0x00 0x00 0x00 0x00 is
339:in 32-bit code. In long mode,
13:
1:
2099:from jQuery API documentation
1862:
1764:NOPs are often involved when
1435:
384:0x66 0x0F 0x1F 0x44 0x00 0x00
205:Machine language instructions
2168:. Kluwer Academic Publishers
1619:indentation-sensitive syntax
1594:Also, a block consisting of
1575:library provides a function
1559:library provides a function
1534:
7:
2067:MDN JavaScript reference –
1796:
1759:
1610:programming language has a
1002:little-endian or big-endian
947:consumes two clock cycles.
609:will most likely expand to
575:will most likely expand to
571:. The assembly instruction
280:
201:command that does nothing.
36:Do Nothing (disambiguation)
10:
2263:
1926:, 1991, pages 223 and 257.
1419:
29:
1778:functions and subroutines
1629:when it should be empty.
1601:
1582:
1566:
1550:
1053:
963:
712:
680:
613:which is encoded 0x46C0.
307:
1976:PA-RISC 2.0 Architecture
1772:, etc. in the form of a
1511:
1379:
1348:
1317:
380:0x0F 0x1F 0x44 0x00 0x00
1508:arrow function syntax):
1463:the same way as in the
1244:
2110:"Lodash Documentation"
1679:this is a partial list
1563:, which does nothing.
1256:
892:This synchronizes the
38:. For other uses, see
1839:– mainframe tautology
1825:HLT (x86 instruction)
1821:– also pauses the CPU
1809:Computer architecture
1661:NOP protocol commands
1164:25500******* (octal)
1025:(extended opcode for
877:Motorola 68000 family
805:(extended opcode for
698:UNIVAC Series 90
40:NOOP (disambiguation)
2165:TeX Reference Manual
1855:, the official long
1492:Function.prototype()
1480:expression statement
546:is equal to itself.
406:, 0x44 0x00 0x00 is
195:programming language
189:instruction and its
44:NOP (disambiguation)
1991:RISC-V Foundation,
1819:Halt and Catch Fire
1543:framework provides
1412:until it returns a
1035:PIC microcontroller
922:MOS Technology 65xx
690:IBM System/390
686:IBM System/370
682:IBM System/360
376:0x0F 0x1F 0x40 0x00
335:in 16-bit code and
265:execute instruction
127:Execute instruction
2242:Computing acronyms
1667:computer protocols
122:Repeat instruction
1974:Hewlett-Packard,
1843:xyzzy (computing)
1831:Identity function
1785:Security exploits
1756:NOOP to you too!
1465:C and derivatives
1377:or more tersely:
1277:C and derivatives
1235:
1234:
949:Undefined opcodes
540:aseq 0x40,gr1,gr1
284:CPU architecture
261:branch delay slot
199:computer protocol
191:assembly language
163:
162:
16:(Redirected from
2254:
2247:X86 instructions
2221:
2220:
2218:
2217:
2207:
2201:
2195:
2189:
2188:
2185:
2181:
2175:
2173:
2159:
2153:
2150:
2144:
2141:
2135:
2130:
2124:
2123:
2121:
2120:
2106:
2100:
2094:
2088:
2082:
2076:
2074:
2065:
2059:
2053:
2047:
2046:
2041:
2040:
2034:
2028:. Archived from
2013:
2002:
1996:
1989:
1983:
1982:on Jun 21, 2020.
1972:
1963:
1962:
1951:
1945:
1944:
1933:
1927:
1920:
1914:
1913:
1911:
1910:
1900:
1887:
1886:
1884:
1876:
1858:
1854:
1827:– pauses the CPU
1745:
1656:
1640:
1628:
1614:
1597:
1578:
1562:
1530:
1527:
1524:
1521:
1518:
1515:
1497:
1493:
1477:
1473:
1458:
1451:
1431:
1415:
1411:
1401:
1398:
1395:
1392:
1389:
1386:
1383:
1373:
1370:
1367:
1364:
1361:
1358:
1355:
1352:
1342:
1339:
1336:
1333:
1330:
1327:
1324:
1321:
1311:
1307:
1272:
1268:
1223:
1202:
1181:
1158:
1153:
1140:
1136:
1124:
1103:
1090:
1079:
1072:
1061:
1041:
1028:
1016:
991:
983:
971:
946:
933:
908:
883:
863:
842:
821:
808:
796:
783:
771:
751:
733:
704:
676:one clock cycle
667:
647:
626:
612:
608:
604:
592:
578:
574:
570:
569:andeq r0, r0, r0
567:This stands for
558:
541:
529:
516:
504:
484:
456:
427:
414:
411:
408:
405:
402:
359:
350:
346:
342:
338:
334:
322:
281:
253:memory alignment
236:
211:instruction sets
187:machine language
167:computer science
155:
148:
141:
59:General concepts
49:
48:
21:
2262:
2261:
2257:
2256:
2255:
2253:
2252:
2251:
2227:
2226:
2225:
2224:
2215:
2213:
2209:
2208:
2204:
2197:TeX wikibook –
2196:
2192:
2183:
2179:
2171:
2169:
2160:
2156:
2151:
2147:
2142:
2138:
2131:
2127:
2118:
2116:
2108:
2107:
2103:
2095:
2091:
2083:
2079:
2072:
2069:empty statement
2066:
2062:
2054:
2050:
2038:
2036:
2032:
2026:
2011:
2003:
1999:
1990:
1986:
1973:
1966:
1953:
1952:
1948:
1935:
1934:
1930:
1921:
1917:
1908:
1906:
1902:
1901:
1890:
1882:
1878:
1877:
1870:
1865:
1856:
1852:
1799:
1787:
1762:
1757:
1743:
1663:
1654:
1647:
1638:
1635:
1626:
1612:
1604:
1595:
1585:
1576:
1569:
1560:
1553:
1537:
1532:
1531:
1528:
1525:
1522:
1519:
1516:
1513:
1495:
1491:
1475:
1471:
1461:block statement
1456:
1453:empty statement
1449:
1438:
1429:
1422:
1413:
1409:
1403:
1402:
1399:
1396:
1393:
1390:
1387:
1384:
1381:
1375:
1374:
1371:
1368:
1365:
1362:
1359:
1356:
1353:
1350:
1346:alternatively,
1344:
1343:
1340:
1337:
1334:
1331:
1328:
1325:
1322:
1319:
1309:
1305:
1302:
1296:
1279:
1270:
1266:
1259:
1247:
1221:
1200:
1187:000240 (octal)
1179:
1168:
1156:
1155:
1151:
1138:
1134:
1122:
1101:
1097:Signetics 8X300
1088:
1077:
1070:
1059:
1047:0b000000000000
1039:
1026:
1014:
989:
981:
969:
942:
931:
906:
881:
861:
840:
819:
806:
794:
781:
769:
749:
731:
702:
665:
645:
624:
610:
606:
602:
590:
576:
572:
568:
556:
539:
527:
515:BIS r31,r31,r31
514:
502:
482:
454:
425:
413:
410:
407:
404:
403:, 0x40 0x00 is
401:
393:
389:
385:
381:
377:
373:
370:
357:
348:
344:
340:
336:
332:
320:
234:
207:
159:
115:Indirect branch
67:Instruction set
47:
28:
23:
22:
15:
12:
11:
5:
2260:
2250:
2249:
2244:
2239:
2223:
2222:
2202:
2190:
2154:
2145:
2136:
2125:
2101:
2089:
2077:
2060:
2048:
2024:
1997:
1984:
1964:
1946:
1928:
1915:
1888:
1867:
1866:
1864:
1861:
1860:
1859:
1846:
1840:
1834:
1828:
1822:
1816:
1811:
1806:
1798:
1795:
1786:
1783:
1761:
1758:
1752:
1729:
1728:
1723:
1718:
1713:
1708:
1703:
1698:
1693:
1688:
1662:
1659:
1646:
1643:
1634:
1631:
1603:
1600:
1584:
1581:
1568:
1565:
1552:
1549:
1536:
1533:
1512:
1510:
1509:
1502:
1499:
1484:
1483:
1468:
1437:
1434:
1421:
1418:
1380:
1349:
1318:
1300:
1294:
1283:null statement
1278:
1275:
1258:
1255:
1246:
1243:
1233:
1232:
1230:
1227:
1224:
1219:
1213:
1212:
1209:
1206:
1203:
1198:
1192:
1191:
1188:
1185:
1182:
1177:
1171:
1170:
1165:
1162:
1159:
1154:(conventional)
1149:
1143:
1142:
1131:
1128:
1125:
1120:
1114:
1113:
1110:
1107:
1104:
1099:
1093:
1092:
1086:
1083:
1080:
1074:
1073:
1071:ADDI x0, x0, 0
1068:
1065:
1062:
1057:
1051:
1050:
1048:
1045:
1042:
1037:
1031:
1030:
1023:
1020:
1017:
1012:
1006:
1005:
998:
995:
992:
986:
985:
978:
975:
972:
967:
961:
960:
940:
937:
934:
929:
918:
917:
915:
912:
909:
904:
898:
897:
890:
887:
884:
879:
873:
872:
870:
867:
864:
859:
853:
852:
849:
846:
843:
838:
832:
831:
828:
825:
822:
817:
811:
810:
803:
800:
797:
792:
786:
785:
778:
775:
772:
767:
761:
760:
758:
755:
752:
747:
741:
740:
737:
734:
728:
727:
711:
708:
705:
700:
694:z/Architecture
678:
677:
674:
671:
668:
663:
657:
656:
654:
651:
648:
643:
636:
635:
633:
630:
627:
622:
615:
614:
599:
596:
593:
588:
581:
580:
565:
562:
559:
554:
548:
547:
544:stack register
536:
533:
530:
525:
519:
518:
511:
508:
505:
500:
494:
493:
491:
488:
485:
480:
466:
465:
463:
460:
457:
452:
438:
437:
436:Load A from A
434:
431:
428:
423:
417:
416:
398:
372:0x0F 0x1F 0x00
367:
360:
353:
352:
329:
326:
323:
318:
305:
304:
301:
296:
291:
285:
269:Motorola 68000
259:, to occupy a
209:Some computer
206:
203:
197:statement, or
161:
160:
158:
157:
150:
143:
135:
132:
131:
130:
129:
124:
119:
118:
117:
107:
99:
98:
94:
93:
92:
91:
86:
85:
84:
79:
77:Illegal opcode
69:
61:
60:
56:
55:
26:
9:
6:
4:
3:
2:
2259:
2248:
2245:
2243:
2240:
2238:
2235:
2234:
2232:
2212:
2206:
2200:
2194:
2187:
2167:
2166:
2158:
2149:
2140:
2134:
2129:
2115:
2111:
2105:
2098:
2097:jQuery.noop()
2093:
2087:
2081:
2070:
2064:
2057:
2052:
2045:
2035:on 2012-01-18
2031:
2027:
2025:0-13-825001-4
2021:
2017:
2016:Prentice Hall
2010:
2009:
2001:
1994:
1988:
1981:
1977:
1971:
1969:
1960:
1956:
1950:
1942:
1938:
1932:
1925:
1919:
1905:
1899:
1897:
1895:
1893:
1881:
1875:
1873:
1868:
1850:
1847:
1844:
1841:
1838:
1835:
1832:
1829:
1826:
1823:
1820:
1817:
1815:
1812:
1810:
1807:
1804:
1801:
1800:
1794:
1792:
1782:
1779:
1775:
1771:
1767:
1755:
1751:
1749:
1741:
1737:
1732:
1727:
1724:
1722:
1719:
1717:
1714:
1712:
1709:
1707:
1704:
1702:
1699:
1697:
1694:
1692:
1689:
1687:
1684:
1683:
1682:
1680:
1676:
1672:
1668:
1658:
1652:
1642:
1630:
1624:
1620:
1616:
1609:
1599:
1592:
1590:
1580:
1574:
1564:
1561:jQuery.noop()
1558:
1548:
1546:
1542:
1507:
1503:
1500:
1489:
1488:
1487:
1481:
1469:
1466:
1462:
1454:
1447:
1446:
1445:
1443:
1433:
1427:
1417:
1406:
1378:
1347:
1316:
1313:
1299:
1293:
1291:
1286:
1284:
1274:
1264:
1254:
1252:
1242:
1240:
1231:
1228:
1225:
1220:
1218:
1215:
1214:
1210:
1207:
1204:
1199:
1197:
1194:
1193:
1189:
1186:
1183:
1178:
1176:
1173:
1172:
1166:
1163:
1160:
1150:
1148:
1145:
1144:
1132:
1129:
1126:
1121:
1119:
1116:
1115:
1111:
1108:
1105:
1100:
1098:
1095:
1094:
1087:
1084:
1081:
1076:
1075:
1069:
1066:
1063:
1058:
1056:
1052:
1049:
1046:
1043:
1038:
1036:
1033:
1032:
1024:
1021:
1018:
1013:
1011:
1008:
1007:
1003:
999:
996:
993:
988:
987:
979:
976:
973:
968:
966:
962:
958:
954:
950:
945:
941:
938:
935:
930:
927:
923:
920:
919:
916:
913:
910:
905:
903:
902:Motorola 6809
900:
899:
895:
891:
888:
885:
880:
878:
875:
874:
871:
868:
865:
860:
858:
857:Motorola 6800
855:
854:
850:
847:
844:
839:
837:
834:
833:
829:
826:
823:
818:
816:
813:
812:
804:
801:
798:
793:
791:
788:
787:
779:
776:
773:
768:
766:
763:
762:
759:
756:
753:
748:
746:
743:
742:
738:
735:
730:
729:
726:
722:
718:
709:
706:
701:
699:
695:
691:
687:
683:
679:
675:
672:
669:
664:
662:
659:
658:
655:
652:
649:
644:
641:
638:
637:
634:
631:
628:
623:
620:
617:
616:
600:
597:
594:
589:
586:
583:
582:
566:
563:
560:
555:
553:
550:
549:
545:
537:
534:
531:
526:
524:
521:
520:
512:
509:
506:
501:
499:
496:
495:
492:
489:
486:
481:
479:
475:
471:
468:
467:
464:
461:
458:
453:
450:
446:
443:
440:
439:
435:
432:
429:
424:
422:
419:
418:
399:
397:
394:
390:
386:
382:
378:
374:
368:
365:
361:
355:
354:
330:
327:
324:
319:
316:
313:
310:
306:
302:
300:
297:
295:
292:
290:
286:
283:
282:
279:
276:
274:
270:
266:
262:
258:
255:, to prevent
254:
249:
247:
243:
238:
232:
228:
224:
220:
216:
212:
202:
200:
196:
192:
188:
184:
180:
176:
172:
168:
156:
151:
149:
144:
142:
137:
136:
134:
133:
128:
125:
123:
120:
116:
113:
112:
111:
108:
106:
103:
102:
101:
100:
96:
95:
90:
87:
83:
80:
78:
75:
74:
73:
70:
68:
65:
64:
63:
62:
58:
57:
54:
51:
50:
45:
41:
37:
33:
32:Null function
19:
2237:Machine code
2214:. Retrieved
2205:
2193:
2182:. Actually,
2177:
2170:. Retrieved
2164:
2157:
2148:
2139:
2128:
2117:. Retrieved
2113:
2104:
2092:
2080:
2063:
2051:
2043:
2037:. Retrieved
2030:the original
2007:
2000:
1987:
1958:
1949:
1940:
1931:
1918:
1907:. Retrieved
1788:
1763:
1733:
1730:
1678:
1664:
1648:
1636:
1605:
1593:
1586:
1570:
1554:
1545:angular.noop
1538:
1485:
1479:
1460:
1452:
1439:
1423:
1407:
1404:
1397:'\n'
1376:
1366:'\n'
1345:
1335:'\n'
1314:
1303:
1297:
1289:
1287:
1282:
1280:
1260:
1248:
1236:
1135:sethi 0, %g0
1102:MOV AUX, AUX
1089:C.ADDI x0, 0
943:
827:± * * * * 0
807:add r0,r0,r0
723:
719:
715:
632:0xF3AF 8000
395:
391:
387:
383:
379:
375:
371:
341:XCHG RAX,RAX
337:XCHG EAX,EAX
287:Instruction
277:
250:
242:memory fault
239:
235:sethi 0, %g0
227:clock cycles
219:status flags
208:
183:no operation
182:
178:
174:
170:
164:
104:
97:Instructions
82:Opcode table
53:Machine code
1814:Filler text
1734:While most
1133:Stands for
1130:0x01000000
1067:0x00000013
1027:ori r0,r0,0
1022:0x60000000
997:0x34000034
980:Opcode for
977:0x08000240
848:0xFD******
802:0x60000019
782:sll r0,r0,0
780:Stands for
777:0x00000000
653:0xD503201F
601:Opcode for
564:0x00000000
538:Opcode for
535:0x70400101
513:Opcode for
510:0x47FF041F
364:Pentium Pro
356:multi-byte
2231:Categories
2216:2016-06-19
2119:2017-12-15
2114:lodash.com
2039:2014-01-09
1909:2012-03-01
1863:References
1746:daemon of
1726:BitTorrent
1669:, such as
1596:BEGIN END;
1442:JavaScript
1436:JavaScript
1167:Jump never
611:mov r8, r8
603:ADD SP, #0
577:mov r0, r0
474:Intel 8085
470:Intel 8080
421:Intel 8008
333:XCHG AX,AX
246:page fault
193:mnemonic,
1791:NOP slide
1774:NOP slide
1615:statement
1541:AngularJS
1535:AngularJS
1496:undefined
1472:undefined
1467:examples;
1410:getchar()
1239:NOP slide
1141:register
642:(64 bit)
621:(32 bit)
587:(16 bit)
498:DEC Alpha
369:0x66 0x90
215:registers
2211:"ftpd.c"
1980:Archived
1797:See also
1766:cracking
1760:Cracking
1577:_.noop()
1490:Use the
1470:Use the
1448:Use the
1430:CONTINUE
1295: ;
1106:16 bits
1044:12 bits
990:LDI 26,0
982:OR 0,0,0
894:pipeline
362:2–9 for
289:mnemonic
273:pipeline
2172:1 April
1837:IEFBR14
1770:dongles
1474:or the
1455:or the
1426:Fortran
1420:Fortran
1388:getchar
1357:getchar
1326:getchar
1229:0x0000
1161:1 word
1152:JFCL 0,
1109:0x0000
1085:0x0001
1010:PowerPC
965:PA-RISC
951:in the
889:0x4E71
824:1 word
757:0x0009
673:0x0000
640:ARM A64
619:ARM T32
598:0xb000
585:ARM T32
552:ARM A32
523:AMD 29k
451:family
317:family
257:hazards
185:) is a
89:Operand
2184:\relax
2180:\relax
2022:
1736:telnet
1716:finger
1686:telnet
1671:telnet
1655:\relax
1608:Python
1602:Python
1589:Pascal
1583:Pascal
1573:Lodash
1567:Lodash
1557:jQuery
1551:jQuery
1459:empty
1428:, the
1265:, the
1251:syntax
1175:PDP-11
1147:PDP-10
1055:RISC-V
924:(e.g.
790:MIPS-X
745:SuperH
449:MCS-51
303:Notes
299:Opcode
223:memory
110:Branch
72:Opcode
2199:relax
2033:(PDF)
2012:(PDF)
1922:AMD,
1883:(PDF)
1748:MINIX
1721:IMAP4
1665:Many
1637:The '
1623:class
1526:=>
1514:const
1382:while
1351:while
1320:while
1208:0x01
1118:SPARC
1078:C.NOP
957:65C02
939:0xEA
914:0x12
869:0x01
490:0x00
462:0x00
442:Intel
433:0xC0
345:REX.W
328:0x90
309:Intel
294:Bytes
231:SPARC
221:, or
177:, or
175:no-op
18:No-op
2174:2020
2020:ISBN
1853:NOPL
1744:ftpd
1711:NNTP
1706:POP3
1696:SMTP
1649:The
1627:pass
1613:pass
1606:The
1571:The
1555:The
1539:The
1517:noop
1476:null
1440:The
1290:null
1271:null
1267:null
1245:Code
1217:WD16
953:NMOS
926:6502
841:SWYM
836:MMIX
765:MIPS
732:NOPR
445:8051
179:NOOP
169:, a
42:and
1857:NOP
1754:200
1740:FTP
1738:or
1701:X11
1691:FTP
1681:):
1651:TeX
1529:{};
1506:ES6
1424:In
1301:{}
1263:Ada
1261:In
1257:Ada
1222:NOP
1201:NOP
1196:VAX
1180:NOP
1139:%g0
1123:NOP
1060:NOP
1040:NOP
1015:NOP
970:NOP
944:NOP
932:NOP
907:NOP
882:NOP
862:NOP
820:NOP
815:MIX
795:NOP
770:NOP
750:NOP
703:NOP
666:NOP
661:AVR
646:NOP
625:NOP
607:nop
591:NOP
573:nop
557:NOP
528:NOP
503:NOP
483:NOP
478:Z80
455:NOP
426:LAA
358:NOP
349:NOP
321:NOP
315:CPU
312:x86
248:.
244:or
171:NOP
165:In
105:NOP
2233::
2176:.
2112:.
2042:.
2018:.
2014:.
1967:^
1957:.
1939:.
1891:^
1871:^
1851:-
1523:()
1457:{}
1414:\n
1400:);
1394:!=
1391:()
1363:!=
1360:()
1341:{}
1332:!=
1329:()
1310:{}
1226:2
1205:1
1184:2
1127:4
1082:2
1064:4
1029:)
1019:4
994:4
984:.
974:4
959:.
936:1
928:)
911:1
886:2
866:1
845:4
809:)
799:4
774:4
754:2
736:2
707:4
696:,
692:,
688:,
684:,
670:2
650:4
629:4
595:2
561:4
532:4
507:4
487:1
476:,
472:,
459:1
447:/
430:1
415:.
325:1
275:.
237:.
233:,
217:,
173:,
2219:.
2122:.
2073:;
1961:.
1943:.
1912:.
1885:.
1639::
1520:=
1498:;
1450:;
1385:(
1372:;
1369:)
1354:(
1338:)
1323:(
1306:;
154:e
147:t
140:v
46:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.