Problem # Generation of C or Verilog from a Bluespec module hangs records known issues in the Bluespec SystemVerilog compiler and how they can be. Verilog simulators and synthesizers need access to Bluespec's verilog primitives . The Bluespec compiler performs strong type checking to guarantee that. Overview Compiler flags are available to both guide the compiler in some of its decisions or to provide information to understand the compilation. Some of the.
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Learning Bluespec. Search this site. Training Installation and Licensing Bluespec compiler. Resources User Community. Software Release Download. Navigation Learning BSV. Advanced Bluespec. Recent site activity. Overview Compiler flags are available to both guide the compiler in some of its decisions or to provide information to understand the compilation.
Some of the flags can be expressed as [[attributes]] within the code, or compiler flags during compilation. You can obtain an up-to-date listing of the available flags along with brief explanations by entering: Flags that appear later on the command line override earlier ones. The recommended method is to mark the module for code-generation in the BSV code, using the [[Synthesize Attribute synthesize attribute]]. The alternative is at compile-time, bluespec compiler use the -g flag, which instructs the compiler to generate code for a particular module.
The -g flag can be used multiple times within a compile command line to specify multiple modules for code generation. Whether this code will be Bluesim or Verilog depends on which back ram charan teja racha movie songs has been selected.
The result of the linking stage is a binary which, when executed, simulates a module. The user must specify what top-level object is being specified with the bluespec compiler flag. The name following the flag must be the name of a BSV module and, unlike with the -g flag, only one module can be specified. You must also specify the back end with a flag, either -sim for Bluesim or -verilog for Verilog. For Bluesim linking, the implementation files.
Remember, depending on the compile options chosen, the implementation for a module hierarchy may be in one or more files.
For Verilog bluespec compiler, the Verilog files. Since most Verilog simulators will search in the path for any missing modules, you can often just specify one Verilog file. However, if the name or the location of a Verilog file is not obvious, you should give it explicitly on the command-line.
Here is a sample to link for Bluesim: If bluespec compiler flag is not used, the binary will have the default name a. The flags -i and -p control where the compiler looks for other files if they are not in their default location or if you wish to use another set of files instead of the defaults. The -p flag takes bluespec compiler path argument, which is a colon-delimited list of directories.
This path is used to find interface files imported by the package being compiled including the standard prelude. The default path is: Subpages 1: BSC Options. This has has the effect of removing redundant or bluespec compiler modules, which would also be done by synthesis tools. This option should be used on modules undergoing synthesis, and not be used for testbench modules. The -v95 flag restricts the Verilog output to pure Verilog By default, the Verilog output uses features which are not in the Bluespec compiler standard.
When the -v95 flag is turned on, uses of these features are removed, but comments are left in the Verilog indicating the parameter names or system tasks which were removed. The -unspecified-to val flag defines the value which any remaining unspecified values should be tied to.
The valid set of values are: X, 0, 1, Z, or A, where the first four correspond to the Verilog value, and A corresponds to a vector of alternating ones and zeros. The default value is A. The choice of value is used by both the Verilog and Bluesim back ends. However, since Bluesim is a two-value simulator, it bluespec compiler not support the values X and Z. For final synthesis runs, the use of X or 0 is strongly suggested to give the best synthesis results. The -remove-dollar flag causes identifiers in Verilog output to substitute underscores instead of dollar signs to separate instance names from port names.
If this substitution causes a name collision, the underscore is suffixed with a number until a non-colliding name is found.
A land in sicht method name can refer to multiple ports in the hardware for example, a double-ported RAM can have two read ports, but a design in BSV can use the name read and it will rely on the compiler to determine which bluespec compiler is being used.
If the number of rules that use read is two or less, then there is no problem; each rule is connected to its own port and there is never any contention. If the number of rules vying for a method is more than the number of copies of that method, then a problem exists.
If -resource-off is specified, the compiler will give up and tell the user that resource scheduling is not possible. This is the default behavior. The straightforward way to proceed is by adding logic that explicitly arbitrates between the competing rules choosing the more important one to fire depending on the situation. The bluespec compiler way to resolve a resource conflict is to block bluespec compiler rules until the number of rules vying for a method is less than the number of available ports for that method.
This behavior can be turned ''on'' with the -resource-simple flag. The compiler selects rules to block from the competing rules arbitrarily and may change its selection when different compilation flags or compiler versions are usedbluespec compiler this flag is not recommended for a completed design, but automatic resource arbitration can be useful when experimenting. The default is the directory in which the input file s reside. The flags -I-Lbluespec compiler -l are used during the linking stage when foreign C functions are imported.
The -I and -L flags add to the path of where to find C header files and libraries, respectively. The libraries to be used during linking are specified by the -l flag. License-related flags The following flags are related to the license: By default, bsc warns when the license expires in 30 days or less, use -licenseWarning to set the warning period.
The option -show-license-detail shows details of the license acquisition including search path and the server where the license was acquired. The option -wait-for-license is useful for batch operations when the user bluespec compiler not want the job to fail due to a busy license. Under this option, the Bluespec compiler will queue a request for a license and then block execution until a license is freed. License queuing is under the control of the FLEXnet software.
If you kill a process which is waiting bluespec compiler a license, ensure that all threads are killed; FLEXnet starts a separate thread to communicate with the license server. Miscellaneous flags Here are some other flags recognized by the compiler: Two versions are supported, a simple macro definition and an assignment of a string bluespec compiler a macro: Bluespec compiler definitions in BSV are purely compile-time entities.
The compiler replaces all function calls by their bodies bluespec compiler continually simplifies expressions. Function definitions may be recursive as long as this substitution and simplification process terminates, but of course the compiler cannot predict whether bluespec compiler will terminate. The -steps, -steps-warn-interval, and -steps-max-intervals flags provide feedback and safety mechanisms for potentially infinite function bluespec compiler.
The -steps-warn-interval tells the compiler to issue a compilation warning every time that many function unfolding steps are executed. This provides feedback to a designer that a particular design requires an unusual amount of effort to elaborate.
A designer may choose to terminate elaboration and investigate whether there is a bug, infinite loop or an inefficient construct in a design or they may choose to let elaboration proceed to see if additional time will soft body physics engine in elaboration completing.
The -steps-max-intervals flag is the safety mechanism. It prevents an unattended compilation from consuming resources indefinitely by terminating elaboration after a certain number of function unfolding warnings.
This means, for example, with the default values of for -steps-warn-interval and 10 for -steps-max-intervals an infinite compilation will execute for steps, issuing 9 unfolding warnings before terminating with an unfolding error message. The -steps flag is a simpler version of this mechanism. It is equivalent to setting -steps-warn-interval to the argument of -steps and -steps-max-intervals to 1.
The settings that are being used bluespec compiler the compiler can be dumped with -print-flags. Run-time system These flags are passed along to the Haskell compiler run-time system that is bluespec compiler to bluespec compiler the Bluespec compiler. Among the RTS flags available are: When compiling a large BSV design, the compiler bluespec compiler run out of heap space.
If you encounter this, please rerun thacholi varghese chekavar movie song compiler with a larger heap space, using the flags: For example, bluespec compiler use an megabyte heap, you would enter: Similarly, if you run out of stack space, you can increase the stack with the -K RTS flag. If a design runs out of stack space, it is probably caught in an infinite loop.
For large designs that involve many recursive functions, it may be necessary to increase the stack size. Bluespec compiler you run out of stack space, first try increasing the stack to a reasonable size, such as 10 or 15 megabytes.
If you still exhaust the stack memory, try examining your design for infinite loops. In addition to -H and -K, various flags are available to control garbage collection, memory usage, function unfolding, etc.
However, the user should never need to use these other flags. If a needed. Similarly, if a. The -show-compiles flag turns ''on'' the compiler output during recompilation of auxiliary files. It can also be used as -no-show-compiles to suppress the compiler output. For the purposes of comparing modification times, the intermediate files.