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Topic: Register Transfer Language

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	Register Transfer Language - Wikipedia, the free encyclopedia
		Register Transfer Language (RTL) is an intermediate representation used by the GCC compiler.
		RTL is used to represent the code being generated, in a form closer to assembly language than to the high level languages which GCC compiles.
		RTL is generated from the GCC Abstract Syntax Tree representation, transformed by various passes in the GCC 'middle-end', and then converted to assembly language.
	en.wikipedia.org /wiki/Register_Transfer_Language (297 words)

	Hardware register - Wikipedia, the free encyclopedia
		The hardware register is contained within a certain peripheral unit, and presented to the central processing unit of the computer by means of memory-mapped I/O or port-mapped I/O.
		Hardware registers are addressed in words, but sometimes only use a few bits of the word read in to, or written out to the register.
		Strobe registers are hardware registers which do not store data but are used as a means of triggering an action when they are accessed.
	en.wikipedia.org /wiki/hardware_register (177 words)

	RTL - GNU Compiler Collection (GCC) Internals
		Most of the work of the compiler is done on an intermediate representation called register transfer language.
		In this language, the instructions to be output are described, pretty much one by one, in an algebraic form that describes what the instruction does.
		RTL Classes: Categories of RTL expression objects, and their structure.
	gcc.gnu.org /onlinedocs/gccint/RTL.html (176 words)

	REGISTER - Definition
		There are only a small number of registers (the "register set"), typically 32 in a modern processor though some, e.g.
		Registers are fast; typically, two registers can be read and a third written -- all in a single cycle.
		Register allocation, typically one phase of the back-end, controls the use of registers by a compiled program.
	www.hyperdictionary.com /computing/register (217 words)

	Register Transfer Language (Site not responding. Last check: 2007-10-09)
		RTL is used to represent the code generated in a form closer to assembly than to the high level languages which compiles.
		RTL is generated from the GCC Abstract Syntax Tree representation transformed by various passes in GCC 'middle-end' and then converted to assembly GCC currently uses the RTL form to most of its optimisation work.
		Register Transfer Language (RTL) is also a language used to the operation of instructions within a processor.
	www.freeglossary.com /Register_Transfer_Language (248 words)

	GCC Design Overview and Our Modifications
		RTL is the low level language used to represent program in later stages of compilation.
		Each instruction in RTL form is represented as a nested tree of nodes, where each node has its code specifying the semantics, mode specifying the type the node operates on and arguments.
		RTL semantics is target independent making it possible to write common optimizers for all targets, however the syntax (set of allowed instructions) is target dependent.
	www.ucw.cz /~hubicka/papers/proj/node6.html (977 words)

	Catalog of compilers, interpreters, and other language tools [p2of5]
		language: C package: GNU superoptimizer version: 2.5 parts: exhaustive instruction sequence optimizer author: Torbjorn Granlund with Tom Wood location: ftp superopt-2.5.tar.Z from a GNU archive site description: GSO is a function sequence generator that uses an exhaustive generate-and-test approach to find the shortest instruction sequence for a given function.
		Chuck Shotton updated: 1993/05/14 language: C package: ae (application executive) version: 2 parts: interpreter author: Brian Bliss location: ftp://sp2.csrd.uiuc.edu/pub/CSRD_Software/APPL_EXEC/ description: ae (the "application executive") is a C interpreter library which is compiled with an application; hence, the interpreter exists in the same process and address space.
		language: C package: gc version: 3.4 parts: library author: Hans-J. Boehm , Alan J. Demers location: ftp://parcftp.xerox.com/pub/russell/gc3.4.tar.Z description: This is a garbage colecting storage allocator that is intended to be used as a plug-in replacement for C's malloc.
	www.faqs.org /faqs/compilers/free/part2 (7417 words)

	RTL - the free encyclopedia (Site not responding. Last check: 2007-10-09)
		RTL is an abbreviation used in several contexts.
		(In programming language compilers) is an intermediate representation used in the GNU Compiler Collection.
		Register transfer level design/description of digital integrated circuits, in
	www.encyclopedia-of-knowledge.com /?t=RTL (121 words)

	Docket No. 92116, In re J.W. (Il. S. Ct.)
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	www.state.il.us /court/Opinions/SupremeCourt/2003/February/Opinions/Html/92116.htm (10015 words)

	Register Transfer Language (RTL)
		RTL is a simple, human-oriented language to specify the operations, register communication and timing of the steps that take place within a CPU to carry out higher level (user programmable) instructions.
		Load a register with certain, common constants (e.g., 0, 1, 2, 4).
		Typically X and Y. All registers may have a 0->Rn operation, however.
	faculty.juniata.edu /rhodes/org/ch6rtl.htm (406 words)

	GCC's Register Transfter Language
		GCC's RTL representation must be generic enough to handle a host of front-ends: C, C++, Java, Fortran, etc. At the same time it cannot be so low-level that it can't be mapped to a particular machine description.
		Furthermore, there are several custom registers: scratch registers that can be used with the understanding that their results will not be used after the execution of the current instruction; the program counter register; and the condition code register.
		The RTL enforces a modicum of low-level type safety by requiring that any change in machine mode between expressions must be represented by an explicit conversion, for instance between fixed and floating point, or between a large integer size and a small one.
	www.cs.berkeley.edu /~billm/cs265/project/rtl.html (962 words)

	The Central Processing Unit (Site not responding. Last check: 2007-10-09)
		When a signal should be transferred to a particular part of the system, the relevant tri-state logic gate is enabled.
		To control the sequence of register transfers, the control unit uses the regular signal from the clock, and a counter so that it can keep track of its position in the sequence.
		The inputs from the micro-operation counter, instruction register and status register are transformed into a set of outputs which are the control signals.
	ncca.bournemouth.ac.uk /CourseInfo/BAVisAn/Year1/CompSys/CPU (778 words)

	GiL - RTL Representation (Site not responding. Last check: 2007-10-09)
		For example, a register may contain a full word but there may be instructions to refer to it as a half word or as a single byte, as well as instructions to refer to it as a floating point number of various precisions.
		Uses of the register outside of an address are not permitted within the same insn as a use in an embedded side effect expression because such insns behave differently on different machines and hence must be treated as ambiguous and disallowed.
		Register notes are of three classes: They may say something about an input to an insn, they may say something about an output of an insn, or they may create a linkage between two insns.
	www.cc.gatech.edu /GiL/refmanuals/gil/gil-full_5.html (9635 words)

	STICH-464 (Site not responding. Last check: 2007-10-09)
		This instruction adds the first register operand to the second register operand, and the second register operand is replaced with the result.
		This instruction is used to transfer one byte from memory or a memory mapped interface into a general purpose register.
		This instruction is used to transfer one word from memory or a memory mapped interface into a general purpose register.
	csg.uwaterloo.ca /~mdmkaastra/cp464/Phase2/STICH-464_Phase2.html (2159 words)

	Register Transfer Language
		Register Transfer Language (RTL) is a concise way of specifying microcode instructions.
		High-level languages are compiled into Assembly language which compiles to Opcodes which evaluates at runtime to Microcode which directly runs hardware circuits.
		Note that this is not standard RTL, and on exams and homeworks you should use a bar.
	www.otal.umd.edu /drweb/cmsc311/rtl.html (786 words)

	Register Transfer Language Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-09)
		Register Transfer Language Encyclopedia Article, Definition, History, Biography
		Looking For register transfer language - Find register transfer language and more at Lycos Search.
		Find register transfer language - Your relevant result is a click away!
	www.artisticnudity.com /encyclopedia/Register_Transfer_Language (495 words)

	Expert About mi:Microoperations
		Register Transfer instructions and MicroOperations for the ADD and SUB instructions for our Simple CPU.
		Register Transfer and Microoperation: Register transfer language, register transfer, bus and memory transfer, arithmatic microoperations, logic microoperations, shift microoperations.
		Data representation; digital logic circuits; instruction formats and addressing modes; register transfer and microoperations; microprogrammed control; RISC architecture; memory organization; pipelined and vector processing; multiprocessors.
	expertsite.biz /dir/mi/microoperations.3.htm (496 words)

	C:\BELLBO~1\COMPSR&E\HTMFILES\00000054.HTM
		In principle, and usually in fact, the language of the lower level is used to describe the components and modes of connections, one level up.
		This is what permits us to talk of ISP as not necessarily determining the exact set of physical registers and transfer paths.
		That is, ISP is the interface language for describing all PMS components in terms of the register-transfer level, not just P. It happens that only one of these PMS components, the processor, carries with it an entire new systems level-the programming level.
	research.microsoft.com /~gbell/Computer_Structures__Readings_and_Examples/00000054.htm (919 words)

	Business Wire: Synopsys Debuts Language-Neutral, Register Tran... @ HighBeam Research (Site not responding. Last check: 2007-10-09)
		Increased capacity is an additional benefit of directly evaluating RTL code; Cyclone uses less than one-tenth the memory of today's RTL event-driven simulators.
		Cyclone accepts an extended range of RTL constructs to leverage the power of cycle-based performance for testbench and memory simulation.
		Note to Editors: Synopsys is a registered trademark of Synopsys Inc. Cyclone is a trademark of Synopsys.
	www.highbeam.com /library/doc0.asp?docid=1G1:18680729&refid=ink_tptd_np (1052 words)

	[No title]
		CS 310 4/26/2004 Handout #56 C. Edmondson-Yurkanan Lecture Notes for RTL and Control given a specific microarchitecture (v 2.0) (for 2 lectures) I.
		Introduction to RTL(register transfer level aka register transfer language) - Overview - RTL describes exactly what happens on a cycle-by-cycle basis - it is essentially the "program" for executing an instruction - in each cycle information is transferred from 1 or more src registers to 1 or more dest.
		- assume that registers are implemented with master slave flip-flops, such that a register can only be read in the first half of the clockcycle, and written in the second half of the clock cycle.) - While a microarchitecture might have parallelism it must avoid resource hazards (ie.
	www.cs.utexas.edu /~chris/cs310/spr2004/hdt/handt56.txt (462 words)

	[No title]
		If the register is spilled to the stack then the constant value should be substituted for it.
		A REG_EQUIV note may also appear on an insn which copies a register parameter to a pseudo-register, if there is a memory address which could be used to hold that pseudo-register throughout the function.
		USE expressions list the registers filled with arguments that are passed to the function.
	www.opensource.apple.com /darwinsource/WWDC2004/gcc-1765/gcc/rtl.h (5481 words)

	Registers from FOLDOC (Site not responding. Last check: 2007-10-09)
		The size and arrangement of a processor's register set is one of the crucial factors in its performance.
		Nearby terms: register assignment « register dancing « registered port « register set » register spilling » Register Transfer Language » regression
		compiler> (By analogy with spilling the contents of an overfull container) When a compiler is generating machine code and there are more live variables than the machine has registers and it has to transfer or "spill" some variables from registers to memory.
	www.bonus.com /contour/compdict/http@@/foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?Registers (105 words)

	Hardware Register Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-09)
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	www.alienartifacts.com /encyclopedia/Hardware_register (346 words)

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	[No title] (Site not responding. Last check: 2007-10-09)
		In this presentation, the register transfer language (RTL) level fault model is defined.
		Based on the model, we present an algorithm for generating tests for detecting functional faults in digital systems.
		The algorithm has important applications in automatic test gpattern generation, redundancy identification, delay and timing analysis, fault coverage at the functional level (for comparing it with the gate level) and RTL testability analysis.
	www.ele.uri.edu /natw99/abs23.txt (64 words)

	STICH-464: Phase 1 (Site not responding. Last check: 2007-10-09)
		This instruction determines the absolute value of the register operand, and replaces the original value with the result.
		This instruction is used to pop a byte off of the stack into a general purpose register.
		This instruction converts the 16-bit value contained in the register into an 8-bit value, and replaces the original value with the result.
	csg.uwaterloo.ca /~mdmkaastra/cp464/Phase1/STICH-464_Phase1.html (1163 words)

	[No title] (Site not responding. Last check: 2007-10-09)
		Topics covered include: Register Transfer Languages, Non-pipelined CPU detailed design both hardwired and micro-programmed, instruction format formats for three architectures Stack, AC-based and general purpose based, assembly programming, memory organization and cache, floating-point arithmetic, and input-output organization.
		Prerequisites of the course (courses) CSCI 2710 and CSCI 3320 (could be taken concurrently) Prerequisites of the course (topics) Knowledge of the principals of digital logic design for both combinational and sequential circuits Knowledge of programming Unusual circumstances of the course None Objectives Study Register Transfer Language (RTL).
		As a result, design problems from Register Transfer Languages are analyzed.
	cs.unomaha.edu /fsyllabi/csci3710.doc (623 words)

	Dictionary.com/register transfer language
		in describing the registers of a computer or digital
		RTL was developed by Chris Fraser and
		RTL is used by the GNU C compiler,
	dictionary.reference.com /search?q=register%20transfer%3Cbr%3E%20language (118 words)

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