thiết bị xử lí tín hiệu signal processors

... asm The original K&R specification included entry as a keyword; it was reserved for future use The processors that tend to be used to host freestanding environments often have a variety of different ... underscore are used) for macro definitions and typedef names This usage appears to give priority to signaling implementation details to the reader (While there is a prose text convention, at least ... articlelike morphemes, or word order to specify the same information (e.g., the topic coming first to signal new information) Experience shows that inexperienced users of English, whose native language...

Ngày tải lên: 17/10/2013, 19:15

... constants in the source code (see Figure 825.1) The frequency of occurrence of these values (most RISC processors dedicate a single register to permanently hold the value zero) comes about through commonly...

Ngày tải lên: 20/10/2013, 10:15

... belief among developers that processors execute these bitwise instructions faster than the arithmetic instructions The extent to which this belief is true varies between processors (it tends to be ... many processors the instructions performing the arithmetic operations are defined to set a specified bit if the result overflows However, the unit of representation is usually a register (some processors ... multiply/add is the most commonly supported by processors because of the frequency of occurrence of this pair in FFT and matrix operations (these invariably occur in signal processing applications) Other...

Ngày tải lên: 20/10/2013, 10:15

... number of processors not support integer multiply and/or divide instructions in hardware (e.g., early high-performance processors CDC 6x00 and 7x00, Cray; most low-cost processors; RISC processors ... complemented, and processors invariably contain an instruction for performing this operation Complementing the bits in a floating-point value is a very rarely required operation and processors not ... and 0.0, respectively Common Implementations Most processors include a single instruction that performs the negation operation On many RISC processors this instruction is implemented by the assembler...

Ngày tải lên: 24/10/2013, 08:15

... other direction (e.g., INT_MAX+2-2 produces the same result as INT_MAX-2+2) On implementations for processors using a segmented architecture this symmetrical behavior may not occur, for values having ... because of internal details of how pointer arithmetic is handled on segment boundaries On some processors additive operations, on integer or pointer types, saturate In this case the undefined ... equivalent bitwise operators; for instance, x ^ y can be written (x & (~y)) | ((~x) & y) However, most processors contain a bitwise exclusive-OR instruction and thus this operator is included in C Being...

Ngày tải lên: 24/10/2013, 08:15

Ngày tải lên: 26/10/2013, 10:23

... increment of glob could be performed in one access on some processors (those whose having an increment memory instruction), but two accesses on other processors (the majority, which effectively perform ... store instruction and not usually include a special case to handle overlapping storage units Some processors include instructions[985] that can load/store a particular sequence of bits from/to storage ... address) are not always specified, or implemented, in other languages It may be more efficient on some processors, for instance, for members to be aligned differently (given that in many languages unions...

Ngày tải lên: 28/10/2013, 15:15

... of the signal function specify exactly the same type, the first without making use of any typedef names typedef void fv(int), (*pfv)(int); void ( *signal( int, void (*)(int)))(int); fv *signal( int, ... integer types with less rank are aligned on the storage boundaries of their promoted type) For processors that have more relaxed alignment requirements, or where optimisations are possible for ... these requirements are not met, often depends on the characteristics of the processor For those processors that have strict alignment requirements translators usually assign parameters at least...

Ngày tải lên: 28/10/2013, 15:15

... jump 1756 6.8.4.2 The switch statement Translator vendors targeting modern processors face an additional problem Successful processors often contain a range of different implementations, creating ... design processors that will execute programs as quickly as possible Holding the executed instructions in a processor’s cache saves the overhead of fetching them from storage and most processors ... addressed by DSP processors, which often contain such performance vs assembler [989] decrement (and/or increment) branch instructions (the SC140 DSP core includes hardware loop DSP processors counters...

Ngày tải lên: 07/11/2013, 09:15

... processing, while skipping, is to enable partially written source code to be skipped and to allow preprocessors to optimize their performance in this special case, speeding up the rate at which the ... specification given elsewhere tokens in directive not expanded unless Common Implementations Some preprocessors used to perform this kind of replacement (some past entries in the Obfuscated C contest[642] ... elsewhere Other Languages Some languages use def rather than define Common Implementations Some preprocessors have a maximum limit on the number of characters that can occur in a replacement list...

Ngày tải lên: 07/11/2013, 09:15

Ngày tải lên: 10/12/2013, 02:15

Ngày tải lên: 22/12/2013, 12:15

... ca cỏc bờn c nh nc qui nh chi tit v hu nh khụng ph thuc vo hiu qu sn xut 30 kinh doanh Chớnh vỡ lí ny nờn ngi lao ng luụn li vo cp trờn, quan h lao ng xớ nghip gia giỏm c v ngi lao ng cú hi ho ... cú ngha l khụng cú quan h lao ng v nhng yu t khỏc lm nờn ni dung ca quan h lao ng Chớnh vỡ nhng lí trờn , nờn vic lm v chng tht nghip luụn c ILO quan tõm Ngay li núi u iu l ca ILO ó xỏc nh mt...

Ngày tải lên: 24/12/2013, 11:09

... measured in billions of processors per year (see Figure 0.4) • Digital Signal Processors (DSP) As the name suggests, these processors are designed for manipulating digital signals— for instance, ... would invalidate this source Common Implementations processors 17 bit Discussion of how implementations handle the above sentence For instance, only processors with 17 bit integers can implement this ... until recently new processors were not introduced sufficiently often to make it cost effective to remove the human compiler written from the process The cost of creating new processors, with special...

Ngày tải lên: 26/01/2014, 07:20

... synaptic operations to propagate the signal So the number of synaptic operations per high-level, functional operation is likely to be high Silicon-based processors can contain millions of transistors ... (brain-imaging technology has not yet reached the stage where we can deduce functionality by watching the signals travelling along neurons) Eyes are the primary information-gathering sensors for reading ... Computational power of the brain One commonly used method of measuring the performance of silicon-based processors is to quote the number of instructions (measured in millions) they can execute in a second...

Ngày tải lên: 26/01/2014, 07:20

... precomputed expression might raise a signal (such as division by zero)?” Fortunately for optimizers, the answer is “Yes,” because any evaluation that raises a computational signal has fallen into an undefined ... The optimal choice can depend on the processor instruction format (RISC processors with fixed-length instructions, or DSP processors using very wide instruction words) and whether decompression ... there was no explicit specification saying otherwise) translation of the rest of the source code and signal successful translation on completion C++ , and renders the program ill-formed 16.5 It...

Ngày tải lên: 26/01/2014, 07:20

... isprint function (7.4.1.8), the fputc function (7.19.7.3) 269 5.2.3 Signals and interrupts Commentary 270 signal Rationale Signals are difficult to specify in a system-independent way The C89 ... strictly conforming program can in a signal handler is to assign a value to a volatile static variable which can be written uninterruptedly and promptly return A second signal for the same handler could ... and signals are to be handled After over 30 years floating point exception handling has finally been specified in the Fortran Standard.[660] A few languages include functionality for handling signals...

Ngày tải lên: 26/01/2014, 07:20

... handling of values that almost cancel, than of an application meaningful value On overflow some processors saturate to the maximum representable value, while others return infinity Testing whether...

Ngày tải lên: 26/01/2014, 07:20

... specifier syntax vendor may supply implementations for a range of processors and chose to support the keyword _ _int_32 On some processors this keyword is an alternative representation for the ... There are so few processors that have a sequence of bits in the value representation that does not represent a value, it is not possible to determine any common behaviors Some processors check ... IGNCR, IGNPAR, INLCR, INPCK, ISTRIP, IXOFF, IXON, PARMRK }; { /* /* /* /* /* /* /* /* /* /* /* Signal interrupt on break */ Map CR to NL on input */ ignore break condition */ Ignore CR */ Ignore...

Ngày tải lên: 26/01/2014, 07:20