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ST20C2 Datasheet(PDF) 130 Page - STMicroelectronics |
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ST20C2 Datasheet(HTML) 130 Page - STMicroelectronics |
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130 / 212 page  move2dnonzero ® 130/212 move2dnonzero 2D block copy non-zero bytes Code: 25 FD Description: Copy non-zero valued bytes from a 2D block of memory to another, non-overlapping, area using parameters set up by move2dinit. The copy is performed using the minimum number of word reads and writes. Areg is the number of bytes in each row, Breg is the address of the destination, and Creg is the address of the source. Definition: if ( source and destination overlap) Undefined effect else for y = 0 .. (count − 1) for x = 0 .. (Aregunsigned − 1) if (byte[Creg + (y × srcStride) + x] ≠ 0) byte ′[Breg + (y × dstStride) + x] ← byte[Creg + (y × srcStride) + x] Areg ′← undefined Breg ′← undefined Creg ′← undefined where count = Move2dBlockLength dstStride = Move2dDestStride srcStride = Move2dSourceStride Error signals: none Comments: Secondar y instruction. Instruction is interruptible. See also: move2dinit move2dzero move2dall |
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