摘要:
A multi-chip system and method are disclosed that utilizes a plurality of graphics pipelines to perform large kernel convolution. Each graphics pipeline includes a standard rendering unit and a video data convolve unit. Each video data convolve unit receives video pixel data from the video output of the standard rendering unit. The video data convolve units are connected in a chain. Each group of one or more video data convolve units in the chain convolves the video pixel data received by the group. The last video data convolve unit in the chain outputs a stream of convolved pixels.
摘要:
A rendering unit positions a supertile so that it intersects a primitive. The rendering unit repeatedly walks over bins of the supertile, applying a layer of texture to the bins of the supertile in each iteration of said repeated walking. The rendering unit advances to the next texture layer after having applied the current texture layer to each candidate bin of the supertile. The results of each texture layer application to the bins may be stored in a texture accumulation buffer. The size of the supertile corresponds to the size of the texture accumulation buffer. After applying a last layer of texture to the bins of the supertile, the supertile may be advanced to a new position. The rendering unit traverses the primitive with the supertile so that the union of areas visited by the supertile covers the primitive.
摘要:
A multi-chip system and method are disclosed for incorporating a primitive assembler in each of one or more geometry chips and one or more rasterization chips. This system may allow per-primitive operations to be performed in the geometry chips, and also allow use of a vertex data interface for sending vertex data to the rasterization chips. The primitive assemblers in the geometry chips may assemble vertices into primitives for clipping tests. The geometry chips may also test an assembled primitive against the projected boundaries of a set of screen space regions, where each region is assigned to one of the rasterization chips. Those primitives residing in more than one region may be sub-divided into two or more new primitives so that each new primitive resides in only one screen space region. The geometry chip may then send the vertex data for each primitive to the corresponding rasterization chip.
摘要:
A graphics system applies multiple layers of texture information to triangles. The graphics system includes a hardware accelerator, a frame buffer and a video output processor. The hardware accelerator receives vertices of a triangle, identifies fragments of a sampling space which intersect the triangle, and applies the multiple layers of texture to the intersecting fragments. The multiple layers of textures may be stored in a texture memory external to the hardware accelerator. The hardware accelerator switches to a next texture layer after applying the textures of a current layer to all the fragments of the triangle. The hardware accelerator includes (or couples to) a texture accumulation buffer which stores color values associated with the triangle fragments between the application of successive texture layers. The frame buffer stores the samples and pixels generated from the samples by filtration. The video output processor transforms the pixels into a video signal.
摘要:
An integrated circuit including logic for testing internal operation of the integrated circuit. The integrated circuit may comprise a plurality of internal functional blocks coupled by a plurality of internal buses. The integrated circuit may also comprise a set of test control input pins and a set of test output pins comprised on the integrated circuit. The integrated circuit may comprise selection logic. The selection logic comprises inputs coupled to various ones of the internal buses, an output coupled to the set of test output pins, and a select input coupled to receive select signals from the set of test control input pins. The selection logic is operable to select internal bus signals from an internal bus based on the select signals from the test control input pins, and the selection logic is configured to output the selected internal bus signals to the set of test output pins. The integrated circuit thus allows multiplexing of different critical internal buses so that the signals on the critical buses may be output for observation via selected test pins on the integrated circuit. The observability logic may be configured to switch slowly relative to the internal busses, and the generation of the observability logic and testing may be automated.
摘要:
A method and a system for stalling large pipelined designs. A computational pipeline may comprise a first module and a second module coupled together. The first module may propagate one or more signals to the second module. A stall-signal may be asserted in order to stall the computational pipeline if the second module is not ready to receive the one or more signals from the first module. The one or more signals propagated from the first module and the asserted stall-signal may be buffered in a stall-buffer. The asserted stall-signal may be propagated to the first module in a next cycle. The first module may be stalled in response to the first module receiving the propagated asserted stall-signal. Next, the asserted stall-signal may be propagated up the computational pipeline.
摘要:
A method and system for synchronizing data streams and transferring control of resources between two processes in a graphics processor is described. The method allows for completion of pending operations of a first process in a manner that ensures the first process may be restarted without loss of data or process sequence. The processing pipeline is allowed to complete normal execution of all process operations required to reach a first process step that may be interrupted. The second process is initiated when the interruption of the first process is verified. Upon completion of the second process, the first process is reactivated at the next process step in sequence.
摘要:
A system and method for reading register contents from a computational pipeline having a plurality of computational units. The system includes a readback bus and a read control unit. The readback bus has a plurality of logic units coupled in a series. Each logic unit couples to a corresponding one of the computational units. The read control unit couples to each of the computational units through a corresponding load line, and is configured to assert a load signal on one of the load lines in response to a register read request. Each of the computational units is configured to transmit a data value from a selected register onto the readback bus in response to detecting an assertion of the load signal on its corresponding load line.
摘要:
An integrated circuit may include several components, one or more interfaces, an interconnect (e.g., a bus), and a controller. The components may each be configured to assert a read request to read data stored externally to the integrated circuit. The interfaces may be configured to output the read request asserted by one of the components and to receive data in response to outputting the request. The interconnect may be coupled to perform one or more data transactions to transmit the data from one of the interfaces to one or more of the components. In response to the read request asserted by one of the components, the controller may inhibit performance of a read transaction initiated by the read request dependent upon a comparison of a total number of outstanding data transactions to a maximum allowable number of outstanding data transactions.
摘要:
A graphics system configured to apply multiple layers of texture information to primitives. The graphics system receives parameters defining a primitive and performs a size test on the primitive. If the size test cannot guarantee that a fragment size of the primitive is less than or equal to a fragment capacity of a texture accumulation buffer, the primitive is divided into subprimitives, and the graphics system applies the multiple layers of texture to fragments which intersect the primitive. The graphics system switches from a current layer to the layer next when it has applied textures corresponding to the current layer to all the fragments intersecting the primitive. The graphics system stores color values associated with the primitive fragments in the texture accumulation buffer between the application of successive texture layers.