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ST20CX bảng dữ liệu(PDF) 149 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) 149 Page - STMicroelectronics

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roundsn
149/212
®
roundsn
round single length floating point number
Code: 26 FD
Description: Round an unpacked result of a floating point oper ation into Areg.
Rounding is performed in round-to-nearest mode, as defined b y IEEE-754. Initially the
post-normalised guardword, fractionword and exponent are in Areg, Breg, and Creg,
as left by the instruction
postnormsn. This instruction is only intended to be used in
the single length rounding code sequence immediately after
postnormsn.
Definition:
Areg
′← rounded and packed fp number
Breg
′← undefined
Creg
′← undefined
Error signals:
none
Comments:
Secondary instruction.
See also:
postnormsn unpacksn



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