VHDL Programming

only be declared in processes and were therefore local to the process. In VHDL93 variables are now able to be declared in packag ...

Shift Operators VHDL87 did not contain operators to allow shifting or rotating. Most of these functions were built by VHDL stand ...

ROL — rotate left q <= a ROL b; qequals arotated left by bbits. Instead of filling the right bbits with a value, the bbits th ...

ARCHITECTURE behave OF test IS BEGIN --- END ARCHITECTURE behave; PACKAGE mypack IS --- END PACKAGE mypack; PACKAGE BODY mypack ...

Unaffected In VHDL87 it was sometimes difficult to describe exactly the behavior required with a concurrent signal assignment st ...

built into the language and therefore in VHDL93 it can be used and over- loaded. The example here shows a use of the XNORoperato ...

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Index 469 a'HIGH(n), 154– 156 a'LEFT(n), 154– 156 a'LENGTH, 441 a'LOW(n), 154– 156 a'RANGE(n), 170– 171 a'REVERSE_RANGE(n), 170– ...

(^470) Index Composite type, 86– 96 Composite type resolution, 128– 130 Concurrent assignment problem, 67 – 69 Concurrent functi ...

Index Driver creation, 27 'DRIVING_VALUE, 450– 451 EDA Tool Settings Dialog box, 374, 376 8-bit lookahead adder, 249 8-bit rippl ...

(^472) Index IF statement, 47– 48 IICE, 400 IICE configuration dialog box, 407 'IMAGE, 451 Impure function, 460 IN, 133 Incomple ...

Index Port maps, 181– 183 'POS, 151– 154 Post layout timing simulation, 286 Postponed process, 459– 460 'PRED, 151– 154 Predefin ...

(^474) Index Sequential statements (Cont.): EXIT statement, 54– 56 IF statement, 47– 48 LOOP statements, 50– 54 NEXT statement, ...

Index T'VAL, 151– 154 Technology libraries, 241– 243 Terminology (definitions), 2– 3 Testbench block diagram, 331 Testbenches, 3 ...

(^476) Index VHDL93 updates (Cont.): REPORT statement, 461 rotate operators, 464 shared variables, 461– 462 shift operators, 463 ...

About the Author Douglas L. Perry is Founder and VP of Customer Solutions at Bridges2Silicon a new startup HDL hardware debuggin ...

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