The PowerPC 604 RISC Microprocessor - eisber.net

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2.3 Constant PoolEach item in the constant pool begins with a I byte tag:. The table below lists the valid tags and their values.CONSTANT_Fieldref_infoul tag;u2 class index;u2 name_and_type_index;Constant hypeCONSTANT_ClassCONSTANT_FieldrefCONSTANT_MethodrefCONSTANT_InterfaceMethodrefCONSTANT_StringCONSTANT_ IntegerCONSTANT_FloatCONSTANT_LongCONSTANT_DoubleCONSTANT_NameAndTypeCONSTANT_Utf6CONSTANT_UnicodeValue0 (^4••••■tagCONSTANT_Methodref_info (ul tag;u2 class_index;u2 name_and_type_index;CONSTANT_InterfaceMethodref_info (ul tag;u2 class_index;u2 name_and_type_index;the tag will have the value CONSTANT_Fi eldref, CONSTANT_Methodref, orCONSTANT_Inter faceMethodrefEach tag byte is then followed by one or more bytes giving more information about the specific constant.2.3.1 CONSTANT_ClassCONSTANT_Class is used to represent a class or an interlace.tagCONSTANT_Class_info (ul tag:u2 name index;The tag will have the value CONSTANT_Classname_indexconstant_poollname_indexl is a CONSTANT_Ut f 8 giving the string name of the class.Because arrays are objects, the opcodes anewarray and mu 1 t i anewar ray can reference array "classes" viaCONSTANT_Class items in the constant pool. In this case, the name of the class is its signature. For example,the class name forisint ( (H IThe class name forISThread('(Ljava lang Thread;'2.3.2 CONSTANT JFieldref,Methodref,InterfaceMethodref)Fields, methods, and interface methods are represented by similar structures.class. indexconstant_pool (class_index ) will be an entry of type CONSTANTs l ass giving thename of the class or interface containing the field or method.For CONSTANT Fi el dref and CONSTANT_Methodref, the CONSTANT__Class item must bean actual class. For CONSTANT_Inter f aceMethodref, the item must an interface whichpurports to implement the given method.name_and_type_indexconstant_pool name_and_type_index ) will be an entry of typeCONSTANT_NameAndType . This constant pool entry indicates the name and signature of thefield or method.2.3.3 CONSTANT_StringCONSTANT_String is used to represent constant objects of the built-in type String.tagCONSTANT_String_infoul tag;u2 string_index;The tag will have the value CONSTANT_St ring•tring_indexcons tant_pool (str I ng_i ndex ) is a CONSTANT_Ut 18 string giving the value to whichthe String object is initialized.2.3.4 CONSTANT_Integer and CONSTANT_FloatCONSTANT_Integer and CONSTANT. Float represent four byte constants.August 22, 1995 lava Virtual Machine Spedllollon 15 16 JAVA VI/III/II Machine Specitl(alton Aug. ,. 22. I995
ATtagbytesCONSTANT_Integer_infoul tag;u4 bytes;CONSTANT_Float_infoul tag;u4 bytes;The tag will have the value CONSTANT_Integer or CONSTANT_FloatFor integers, the four bytes are the integer value. For floats, they are the IEEE 754 standardrepresentation of the floating point value. These bytes are in network (high byte first) order.2.3.5 CONSTANT_Long and CONSTANT_DoubleCONSTANT_ Long and coNsTANT_Doub1e represent eight-byte constants.CONSTANT_Long_infoul tag;u4 high_bytes;u4 low_bytes;CONSTANT_Double_infoul tag;u4 high_byte:);u4 low_bytes;All eight-byte constants take up two spots in the constant pool. If this is the n il' item in the constant pool, thenthe next item will be numbered n+ 2.tagThe tag will have the value CONSTANT_Long or CONSTANT_Doubl e.high_byt••, low_byt••For CONSTANT_Long, the 64 -bit value is (high...bytes «32) + low_bytes.For CONSTANT_Double, the 64 -bit value, high_.bytes and low_bytes together representthe standard IEEE 754 representation of the double-precision floating point number.2.3.6 CONSTANT_NameAndTypecoNsTANT_NameAndType is used to represent a field or method, without indicating which class it belongs to.tagCONSTANT_NarneAndType_ info I1 tag;u2 name_index;u2 signature_index;The tag will have the value CONSTANT_NameAridType1name_indexconstant_pool I name_ i ndex ) is a CONSTANT_Ut 18 string giving the name of the fieldor method.• ignature_indexconstant_pool l signature_index 1 is a CONSTANT_Ut 18 string giving the signatureof the field or method.2.3.7 CONSTANT_Utf8 and CONSTANT UnicodeCONSTANT_Ut f8 and CONSTANT_Uni code are used to represent constant string values.CONSTANT__Ut f 8 strings are "encoded" so that strings containing only non-null ASCII characters, can berepresented using only one byte per character, but characters of up to 16 bits can be represented.All characters in the range Ox0001 to Ox0071: are represented by a single byte:• - • - • - • - - • - • -1017bits of data- • - • - - • - - - -The null character (0x0000) and characters in the range 0x0080 to Ox0714: are represented by a pair of two bytes4 - • - • - • - • - • - • - • - • • - • - • - 4 - - - • - - •1111101 5 bitst 1 )1101 6 bits• - • - • - - • - - • - - • •- • - - - • - 4 - • - 4 - •Characters in the range 0x0800 to OxFFIT are represented by three bytes:• - • - • - • - • - • - • - • - • • - ♦ - • - - • - • - • - • - • • - • - • - • - • - • - • - • - •1111111014 bits 1 11101 6 bits 1 11101 6 bits 1• -•-.-.-.-.-.-. - • -+-.- s-+-•-.-• -+ -.-.-.-.-. -• -There are two differences between this format and the "standard" UTF-8 format. First, the null byte (0x00) isencoded in two-byte format rather than one-byte, so that our strings never have embedded nulls. Second, onlythe one-byte, two-byte, and three-byte formats are used. We do not recognize the longer formats.t aglengthbytesCONSTANT_Utfe_info (ul tag;u2 length;ul bytes I length);CONSTANT_Unicode_infoul tag;u2 length;u2 bytes ( length' ;The tag will have the value CONSTANT_Ut 18 or CONSTANT_Uni code.The number of bytes in the string. These strings are not null terminated.The actual bytes of the string.Auguso 22, 1995 lava Virtual Machine Specification 17 le lava V11111111 Machine Sivo(Kntton Aug... 12 1541
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The PowerPC 604 RISC Microprocessor
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Rename valid I Reg num Result Resul
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updated by speculatively executed m
Page 7 and 8: PowerPC 604Reservation stationRA (0
Page 9 and 10: Data addressInstruction address•M
Page 11 and 12: Threaded Codethreaded = aufgefadelt
Page 13 and 14: token threaded codeindirect token t
Page 15 and 16: Kosten auf dem MIPS 83000indirect t
Page 17 and 18: CTIL'Start / Restart' 14ZIP Funktio
Page 19 and 20: SystemparameierStackbefehleKarmen a
Page 21 and 22: KontrollstrukturenBEGIN ... END Sch
Page 23 and 24: Stack Framelocal stacklocalsparamet
Page 25 and 26: 122 The P-code Machine [Ch.Thus the
Page 27 and 28: 68Pascal Implementation: Compiler a
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Page 35 and 36: Tables of Lexical Analysis123456frw
Page 37 and 38: JVIII ■ 111t14 /1.11111ySIS ai Y
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Page 41 and 42: 8 Pascal Implementation: Compiler a
Page 43 and 44: 12 Pascal implementation: Compiler
Page 45 and 46: 16Pascal Implementation: Compiler a
Page 47 and 48: 30 Pascal inipletnentatIon: Compile
Page 49 and 50: 34 Pascal implementation: Complier
Page 51 and 52: if) 1993, 1994, 1995 Sim Microsyste
Page 53 and 54: 0-PrefaceThis document describes ve
Page 55 and 56: method calls into actual method cal
Page 57: auper_el arsThis field is an index
Page 61 and 62: 2.6.1 SourceFileThe "SourceFile" at
Page 63 and 64: local ..verieble_table_lengthThis f
Page 65 and 66: 1dc2wPush long or double from const
Page 67 and 68: I 3.4Storing Stack Values into Loca
Page 69 and 70: anewarrayAllocate new array of refe
Page 71 and 72: PastoreStore into single float arra
Page 73 and 74: laddLong integer addfSubSingle floa
Page 75 and 76: dreminegInegInegdnegDouble float re
Page 77 and 78: IliLong integer to integerSyntax:L
Page 79 and 80: ifleBranch if less than or equal to
Page 81 and 82: dcmpgDouble float compare (1 on NaN
Page 83 and 84: 3.13 Table JumpingtableswitchAccess
Page 85 and 86: the matched method is found. The me
Page 87 and 88: Appendix A: An OptimizationA.2 Push
Page 89 and 90: cpgetfield2_quickFetch held from ob
Page 91 and 92: checkcast_quickMake sure object is
Page 93 and 94: Efficient JavaVM Just-in-Time Compi
Page 95 and 96: The second pass of the compiler tra
Page 97 and 98: chain length 1 2 3 4 5 6 7 8 9 >9oc
Page 99 and 100: sieve JavaLex javac espresso i Toba
Page 101 and 102: Technical Overview of the Common La
Page 103 and 104: In contrast to the JVM where all st
Page 105 and 106: The ldind t instruction expects an
Page 107 and 108: It should be obvious that having va
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9 Interaction between value and ref
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2. CLI Partition II: Metadata. http
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Anforderungen an den Zwischencode
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DieRoboterprogrammiersprache• kei
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Implementierung des Interpreters•
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Printed by andi from a0.complang.tu
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power but retain the disciplined vi
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I- be reached from the present curs
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the editor will be invoked asking t
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immediately that 'I' has type integ
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--y-PASC7,1,.The useof a formal lan
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Implementation Techniques for Prolo
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x(X) a(A)a(C) b(C), c(C)b(s(0))c(s(
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Unification in general consists of
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for the classification of temporary
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copy stack1trailenvironment stack1t
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process reduction attempt are elimi
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