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ST20CX bảng dữ liệu(PDF) 130 Page - STMicroelectronics

tên linh kiện ST20CX
Giải thích chi tiết về linh kiện  Instruction Set Reference Manual
PDF  212 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST20CX bảng dữ liệu(HTML) 130 Page - STMicroelectronics

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move2dnonzero
®
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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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