Burst memory reads are not supported by the RV770; however, the 710, 730, 740, and 790 do support it. Chips after R770 support burst reads and memory-read instructions. This allows up to 16 consecutive locations to be read into up to 16 consecutive GPRs. This adds a new field BURST_CNT to MEM_RD_DWORD0.
For each iteration of the burst, the DST_GPR is incremented by 1 and the ARRAY_BASE is incremented by 1. The SRC_GPR is not affected.
ATI Radeon HD 4890 supports burst memory reads
Posted on Sunday, March 29 2009 @ 20:06 CEST by Thomas De Maesschalck