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ST20C4 Scheda tecnica(PDF) 149 Page - STMicroelectronics

Il numero della parte ST20C4
Spiegazioni elettronici  Instruction Set Reference Manual
PDF  212 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C4 Scheda tecnica(HTML) 149 Page - STMicroelectronics

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roundsn
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®
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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