摘要:
A method and program for designing an electronic circuit, especially a clock tree and a sub-clock tree, within a set of sinks with given target arrival time windows, preferably on an integrated circuit. The clock tree and the sub-clock tree are preferably connected through one or multiple fixed circuits which must not be altered, cloned or removed. Several alternative implementations of the at least one logic structure are built and for each of the several alternative implementations data is stored. A set of configurations is built, each configuration comprising a combination of the one or several alternative implementations and each configuration satisfying the target arrival time windows at the complete set of sinks. A configuration is selected according to an evaluation of the data, preferably latency data, for constructing the configuration. No manual interaction is needed and a configuration with minimum latencies is provided.
摘要:
A design structure for designing an electronic circuit, especially a clock tree and a sub-clock tree, within a set of sinks with given target arrival time windows, preferably on an integrated circuit designed by an IC design house or other circuit design provider. The clock tree and the sub-clock tree are preferably connected through one or multiple fixed circuits which must not be altered, cloned or removed. Several alternative implementations of the at least one logic structure are built and for each of the several alternative implementations data is stored. A set of configurations is built, each configuration comprising a combination of the one or several alternative implementations and each configuration satisfying the target arrival time windows at the complete set of sinks. A configuration is selected according to an evaluation of the data, preferably latency data, for constructing the configuration. No manual interaction is needed and a configuration with minimum latencies is provided.
摘要:
A method and program for designing an electronic circuit, especially a clock tree and a sub-clock tree, within a set of sinks with given target arrival time windows, preferably on an integrated circuit. The clock tree and the sub-clock tree are preferably connected through one or multiple fixed circuits which must not be altered, cloned or removed. Several alternative implementations of the at least one logic structure are built and for each of the several alternative implementations data is stored. A set of configurations is built, each configuration comprising a combination of the one or several alternative implementations and each configuration satisfying the target arrival time windows at the complete set of sinks. A configuration is selected according to an evaluation of the data, preferably latency data, for constructing the configuration. No manual interaction is needed and a configuration with minimum latencies is provided.
摘要:
A design structure for designing an electronic circuit, especially a clock tree and a sub-clock tree, within a set of sinks with given target arrival time windows, preferably on an integrated circuit designed by an IC design house or other circuit design provider. The clock tree and the sub-clock tree are preferably connected through one or multiple fixed circuits which must not be altered, cloned or removed. Several alternative implementations of the at least one logic structure are built and for each of the several alternative implementations data is stored. A set of configurations is built, each configuration comprising a combination of the one or several alternative implementations and each configuration satisfying the target arrival time windows at the complete set of sinks. A configuration is selected according to an evaluation of the data, preferably latency data, for constructing the configuration. No manual interaction is needed and a configuration with minimum latencies is provided.
摘要:
First and second sets of numbers are received in an input range, which is separated into sub ranges. A first sub range is processed by initializing bits of a memory to a first logical state and by changing the initial state of each of the bits corresponding to a received number of the first set that is within the first sub range. Each number received in the second set is compared to a bit in the memory to identify a set of received numbers that are in the first sub range and that are in both the first set and the second set. The comparing is responsive to detecting a change of initial state of any bit in the memory during the processing of the first sub range. The processing and comparing is repeated for remaining sub ranges to identify received numbers that are in both the sets.
摘要:
The present invention relates to a method and respective system for operating a DRAM main memory. One buffer line is provided for multiple pages. When writing data to the buffer it is decided which to which buffer-line the data is written to based on its destination main memory address. A tuple consisting of lower memory address and data is stored. Data entered into the buffer-line will be sorted by page in case the line is flushed to the main memory. Sorting the buffer entries results in less page openings and closings, since the data is re-arranged by memory address and therefore in logical order. By using one line for multiple pages only a fraction of memory of a common set-associative cache is needed, thus decreasing the amount of overhead significantly.
摘要:
The present invention relates to a method and respective system for operating a DRAM main memory. One buffer line is provided for multiple pages. When writing data to the buffer it is decided which to which buffer-line the data is written to based on its destination main memory address. A tuple consisting of lower memory address and data is stored. Data entered into the buffer-line will be sorted by page in case the line is flushed to the main memory. Sorting the buffer entries results in less page openings and closings, since the data is re-arranged by memory address and therefore in logical order. By using one line for multiple pages only a fraction of memory of a common set-associative cache is needed, thus decreasing the amount of overhead significantly.