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Instruction Descriptions 4–123
4.10.18 Floating-Point Register to Integer Register Move
Format:
Operation:
CASE:
FTOIS:
Rc<63:32> ← SEXT(Fav<63>)
Rc<31:0> ← Fav<63:62> || Fav <58:29>
FTOIT:
Rc <- Fav
ENDCASE
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
Data in a floating-point register file is moved to an integer register file.
The Fb field must be F31.
The instructions do not interpret bits in the register files; specifically, the instructions do not
trap on non-finite values. Also, the instructions do not access memory.
FTOIS is exactly equivalent to the sequence:
STS
LDL
FTOIT is exactly equivalent to the sequence:
STT
LDQ
Software Note:
FTOIS and FTOIT are no slower than the corresponding store/load sequence and can be
significantly faster.
FTOIx Fa.rq,Rc.wq
!Floating-point Operate format
None
FTOIS Floating-point to Integer Register Move, S_floating
FTOIT Floating-point to Integer Register Move, T_floating
None