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Instruction Descriptions 4–105
4.10.1 Copy Sign
Format:
Operation:
CASE
CPYS: Fc ← Fav<63> || Fbv<62:0>
CPYSN: Fc ← NOT(Fav<63>) || Fbv<62:0>
CPYSE: Fc ← Fav<63:52> || Fbv<51:0>
ENDCASE
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
For CPYS and CPYSN, the sign bit of Fa is fetched (and complemented in the case of CPYSN)
and concatenated with the exponent and fraction bits from Fb; the result is stored in Fc.
For CPYSE, the sign and exponent bits from Fa are fetched and concatenated with the fraction
bits from Fb; the result is stored in Fc.
No checking of the operands is performed.
Notes:
• Register moves can be performed using CPYS Fx,Fx,Fy. Floating-point absolute value
can be done using CPYS F31,Fx,Fy. Floating-point negation can be done using
CPYSN Fx,Fx,Fy. Floating values can be scaled to a known range by using CPYSE.
CPYSy Fa.rq,Fb.rq,Fc.wq
!Floating-point Operate format
None
CPYS Copy Sign
CPYSE Copy Sign and Exponent
CPYSN Copy Sign Negate
None