Level Epsilon Architecture Support Reference Manual

More documents

Recommendations

Info

Data Structure and Text Virtual Segments An unpaged virtual segment is a single actual segment; it cannot exceed 2**20-1 words in length. An IndexedCharDD can designate only the first 2**16 words of an unpaged segment. A paged virtual segment is represented by several actual segments: a page table and one or more pages. The page table contains an untouched or original DD for each page. Any unindexed DD for the segment has a special tag designated "paged" and refers to the page table. Any indexed DD for the segment designates an element of a particular page. The page DDs (the original DDs in the page table) are not marked paged, but the IndexedDDs designating elements in pages have a special tag. All pages are 2**13 words long, except the last page in a virtual segment, which must be shorter. If a paged virtual segment has a length equal to an integer multiple of 2**13, the processor requires that the page table have an additional last page with length equal to zero. The ASD for each page contains a reference to the original DD for that page; this reference is an IndexedSingleDD whose ASD_ref designates the page table and whose index is the page index. This back link from page to page table is essential for automatic page switching operations. In summary, a paged virtual segment is a two-layer structure; the DD for the whole segment specifies the page table, which contains a DD for each page. An unused page has an untouched DD; for each touched page, the DD refers to the defining ASD. MaxLen defines the maximum length of a paged virtual segment. This integer value varies by each processor type as follows: Processor Type Maximum Paged Virtual Segment Length Libra 680/780/880 (2**13) * (2**20 - 1) - 1 Libra 4000 (2**27) - 1 Libra 4100 (2**32) - 1 Libra 4200/6200 (2**13) * (2**20 - 1) - 1 MaxInx defines the largest integer value allowed for character indexing and iteration counts associated with pointer operations. MaxInx is defined as MaxLen * 12. 3–10 6878 7530–007
Virtual Index Data Structure and Text Any word or character in a virtual segment can be specified by an integer called its virtual index. The virtual index of the element is the zero-relative ordinal of that element when the entire segment is considered as an array of elements of that size. An equivalent operational definition of virtual index is as an integer that can generate an IndexedDD designating the element when the integer is applied by the Index operator to an unindexed DD that designates the virtual segment and has the appropriate element_size. This definition of virtual index can be extended to double precision elements only for elements with even word alignment within the segment. Because double precision elements can occur with odd alignment, it is more useful to define the virtual index of a double item as the virtual index of its first word. The virtual index of an IndexedDD is stored in as many as three components: 1. The page index (pX), for a paged segment, designates the page; it is an index into the page table. The pX value is implicit, because the IndexedDD is a copy of page[pX] of the page table. The ASD referenced by the IndexedDD contains a reference to the page descriptor; the reference is an IndexedSingleDD with pX in its index field. For an unpaged segment, pX is defined to be zero. 2. The word index (wX) designates the referenced word within the actual segment; wX is in the index field of an IndexedWordDD or in the word_index field of an IndexedCharDD. 3. The character index (cX) designates the referenced character within the word; cX is in the char_index field of an IndexedCharDD. The virtual index (vX) for an IndexedDD is computed from these three values, according to the element_size of the IndexedDD: single or double: vX = pX*2**13 + wX 4 bit: vX = (pX*2**13 + wX)*12 + cX 8 bit: vX = (pX*2**13 + wX)*6 + cX 6878 7530–007 3–11
Page 1 and 2: ClearPath Enterprise Servers Level
Page 3 and 4: Contents Section 1. Introduction Pu
Page 5 and 6: Contents Numeric-Interpretation Ope
Page 7 and 8: Contents 6878 7530-007 vii
Page 9 and 10: Section 1 Introduction Purpose Scop
Page 11 and 12: Section 2 Process Model This sectio
Page 13 and 14: Process Model Arrays of 4-bit chara
Page 15 and 16: Linkages and Addressing Environment
Page 17 and 18: Protection Process Model The term p
Page 19 and 20: Addressing Process Model The only a
Page 21 and 22: Stack and Display Registers Process
Page 23 and 24: Section 3 Data Structure and Text M
Page 25 and 26: Data Structure and Text The terms s
Page 27 and 28: Tag-4 Word and Tag-6 Word Data Stru
Page 29 and 30: Absolute Store Reference Word (ASRW
Page 31: Data Structure and Text The followi
Page 35 and 36: Environment Links Data Structure an
Page 37 and 38: Data Structure and Text User progra
Page 39 and 40: Entered ENVW (Tag = 3) env_link RCW
Page 41 and 42: Tag Values Data Structure and Text
Page 43 and 44: Section 4 Interrupts This section g
Page 45 and 46: ROI Interrupts ROI is an interrupt
Page 47 and 48: Restart Configuration Libra 6xx and
Page 49 and 50: Arithmetic Interrupts Interrupts Se
Page 51 and 52: Interrupts 2. If the result can be
Page 53 and 54: Block Exit CVI ROI Repeat EXIT ODI
Page 55 and 56: The following actions are required
Page 57 and 58: Interrupts When Stack Overflow chec
Page 59 and 60: Interrupts • Reindex checks:Index
Page 61 and 62: Interrupts To cause the operation t
Page 63 and 64: Scratch Pad Errors (Libra 6xx and 7
Page 65 and 66: Hardware Error - Lost CVI ROI Abort
Page 67 and 68: Invalid Address - Lost CVI ROI Abor
Page 69 and 70: Interrupts An Interval Timer is set
Page 71 and 72: Interrupts If the IRR indicates oth
Page 73 and 74: 44 (02C) Interval Timer 45 (02D) Em
Page 75 and 76: Section 5 Operator Set This section
Page 77 and 78: Interrupts and Resumption Operator
Page 79 and 80: Operator Set Some operators, not ot
Page 81 and 82: Operator Set Final stack items are
Page 83 and 84:
Operator Set For p=13, d=0, q=2, e=
Page 85 and 86:
Rounding Function R Operator Set A
Page 87 and 88:
Magnitude Round-to-Integer Function
Page 89 and 90:
Truncation Function T Operator Set
Page 91 and 92:
Normalization Function N Operator S
Page 93 and 94:
Numeric-Interpretation Operators Op
Page 95 and 96:
MULX Operator Set MULX requires tw
Page 97 and 98:
AMIN and AMAX Operator Set AMIN an
Page 99 and 100:
Operator Set If RaI(x) equals TooBi
Page 101 and 102:
Binary-to-Decimal Conversion Operat
Page 103 and 104:
CVS2 Operator Set The input argume
Page 105 and 106:
any(bit-vector) Top-of-stack t
Page 107 and 108:
Top-of-stack TOS: opnd TOS
Page 109 and 110:
LOG2 Operator Set LOG2 requires on
Page 111 and 112:
ISOL Operator Set ISOL creates a s
Page 113 and 114:
DFTR Operator Set DFTR sets a fiel
Page 115 and 116:
Reference Generation and Evaluation
Page 117 and 118:
PCW Evaluation Operator Set In the
Page 119 and 120:
LNMC Operator Set LNMC is equivale
Page 121 and 122:
Operator Set Valid representations
Page 123 and 124:
MPCW Operator Set MPCW is a litera
Page 125 and 126:
Operator Set If the argument is an
Page 127 and 128:
Operator Set For most clients, aFOP
Page 129 and 130:
The delta portion of the address co
Page 131 and 132:
EVAL Operator Set The purpose of E
Page 133 and 134:
Operator Set If the Initial Referen
Page 135 and 136:
Operator Set STON deletes the Initi
Page 137 and 138:
Operator Set ref: SIRW, IDD, AS
Page 139 and 140:
Processor State Operators Operator
Page 141 and 142:
DBUN A branch destination argument
Page 143 and 144:
Operator Set TOS TOS:
Page 145 and 146:
Procedure Exit Operators Operator S
Page 147 and 148:
Assertion Operators Operator Set Th
Page 149 and 150:
RSDN Operator Set RSDN requires th
Page 151 and 152:
Data Array Operators Operator Set O
Page 153 and 154:
BMS Operator Set BMS is a variatio
Page 155 and 156:
Operator Set For word-transfer oper
Page 157 and 158:
Operator Set D
Page 159 and 160:
TUNU len: opnd(integer) Top
Page 161 and 162:
Transfer Operators Operator Set Cha
Page 163 and 164:
The following operators terminate w
Page 165 and 166:
Operator Set WordIndex and BitIndex
Page 167 and 168:
Character Translate Operator Operat
Page 169 and 170:
Operator Set There are three groups
Page 171 and 172:
Unpack-Unsigned Operators Operator
Page 173 and 174:
Operator Set If the source digit se
Page 175 and 176:
Operator Set The edit table must be
Page 177 and 178:
EXSU Operator Set len: opnd(int
Page 179 and 180:
Character Insert Operators Operator
Page 181 and 182:
MVNU Operator Set For an EBCDIC so
Page 183 and 184:
Operator Set With an IndexedWordDD,
Page 185 and 186:
Vector Assignment Operators Operato
Page 187 and 188:
S stride_B stride_A
Page 189 and 190:
Reduction Operators Linear Sum Thes
Page 191 and 192:
Z stride_B stride_A
Page 193 and 194:
Operator Set The purpose of the SUM
Page 195 and 196:
Miscellaneous Operators NOOP No ac
Page 197 and 198:
Section 6 Restricted Operators The
Page 199 and 200:
Restricted Operators WASD overwrite
Page 201 and 202:
REXI The restricted operator REXI
Page 203 and 204:
WATI Restricted Operators The rest
Page 205 and 206:
IDLE Restricted Operators The rest
Page 207 and 208:
Restricted Platform Operators Restr
Page 209 and 210:
Restricted Operators When software
Page 211 and 212:
Restricted Operators WEMW (Libra 6
Page 213 and 214:
Local ID Register (LID) [read only,
Page 215 and 216:
Restricted Operators Both Server Co
Page 217 and 218:
Register Name Register ID Read/Writ
Page 219 and 220:
6. Adds the last saved TOD counter
Page 221 and 222:
Run Timer Restricted Operators The
Page 223 and 224:
WIPS State Identifier High NCB Memo
Page 225 and 226:
SASP Restricted Operators SASP ins
Page 227 and 228:
Appendix A Alphabetical Operator Co
Page 229 and 230:
Mnemonic Operator Name Hex Operator
Page 231 and 232:
Mnemonic Operator Name Hex Operator
Page 233 and 234:
Mnemonic Operator Name Hex NTGD Int
Page 235 and 236:
Mnemonic Operator Name Hex SE8C Set
Page 237 and 238:
Mnemonic Operator Name Hex SUM Summ
Page 239 and 240:
Mnemonic Operator Name Hex USNU Unp
Page 241 and 242:
Appendix B Boolean Accumulator X-Re
Page 243 and 244:
TFFF, OFFF, and EXTF FLTF saved in
Page 245 and 246:
Appendix C Operator Encoding The pr
Page 247 and 248:
Primary encodings are 00-3F are VAL
Page 249 and 250:
Variant encodings 00-2F are undefin
Page 251 and 252:
Appendix D Data Type Formats Throug
Page 253 and 254:
Double Precision, numeric interpret
Page 255 and 256:
tag 8 Data Type Formats segment_typ
Page 257 and 258:
Untouched DD Data Type Formats
Page 259 and 260:
IndexedCharDD (Indexed Character Da
Page 261 and 262:
Stuffed Indirect Reference Word (SI
Page 263 and 264:
action_valid [12: 1] Action_status
Page 265 and 266:
Tag-4 Word and Tag-6 Word Data Type
Page 267 and 268:
Return Control Word (RCW) Data Type
Page 269 and 270:
Absolute Store Reference Word (ASRW
Page 271 and 272:
Appendix E Processor Features Opera
Page 273 and 274:
Appendix F Operator and Common Acti
Page 275 and 276:
aACCE Operator and Common Action R
Page 277 and 278:
Operator and Common Action Referenc
Page 279 and 280:
aEVCH Operator and Common Action R
Page 281 and 282:
aPOAV Operator and Common Action R
Page 283 and 284:
aPRCW Operator and Common Action R
Page 285 and 286:
Clients: CHEK: validate vector_A:I1
Page 287 and 288:
BRFL Operator and Common Action Re
Page 289 and 290:
CPVN Operator and Common Action Re
Page 291 and 292:
DLET Operator and Common Action Re
Page 293 and 294:
EXSD p D2 also represents EXSU See
Page 295 and 296:
ICLD Operator and Common Action Re
Page 297 and 298:
Operator and Common Action Referenc
Page 299 and 300:
MPWL p F6 also represents MPWP See
Page 301 and 302:
NTTD v 9586 Int Overflow: TId(x) =
Page 303 and 304:
POLY v 95C7 See aAPIX: current vec
Page 305 and 306:
RSQR v 9550 Inv Arg/Par: x (TOS) n
Page 307 and 308:
SESW v 95A2 also represents SEDW O
Page 309 and 310:
SNGT p CC See aAPIX: IDD argument
Page 311 and 312:
SUBT p 81 Operator and Common Acti
Page 313 and 314:
TLED Operator and Common Action Re
Page 315 and 316:
UPLD Operator and Common Action Re
Page 317 and 318:
VPS v 95EB See aAPIX: current vect
Page 319 and 320:
VUV v 95EA See aAPIX: current vect
Page 321 and 322:
Appendix G Interupt Reference This
Page 323 and 324:
Bounds Error CVI 18 (12) ODI aAPIX:
Page 325 and 326:
Invalid Address - Here CVI 15 (0F)
Page 327 and 328:
or TOS is operand and TOS2 in {SIRW
Page 329 and 330:
Non-maskable External CVI 27 (1B) S
Page 331 and 332:
Undefined Operator CVI 23 (17) ODI
Page 333 and 334:
Vector Arithmetic Exception OVI 2 O
Page 335 and 336:
Index A aACCE , 5-70, F-3 aAPIX , 5
Page 337 and 338:
TGTD, 5-87 TGTU, 5-87 TLED, 5-87 TL
Page 339 and 340:
CPVN, 5-111 CPVS, 5-112 VMV, 5-112
Page 341 and 342:
ICLD, 5-98 ICRD, 5-98 ICUD, 5-98 IN
Page 343 and 344:
NOWR , 5-51, A-6, F-28 NTGD , 5-26,
Page 345 and 346:
Program Word Index (PWI), 2-11 Prog
Page 347 and 348:
SEXT , 6-30, A-9, F-35 SFDC , 5-104
Page 349 and 350:
TUND , 5-84, A-12, F-41 TUNU , 5-85
Page 352:
© 2012 Unisys Corporation. All rig
show all

Level Epsilon Architecture Support Reference Manual

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?