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Instruction Descriptions 4–117
4.10.12 Convert IEEE Floating to Integer
Format:
Operation:
Fc ← {conversion of Fbv}
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
The floating operand in register Fb is converted to a two’s-complement number and written to
register Fc. The conversion aligns the operand fraction with the binary point just to the right of
bit zero, rounds as specified, and complements the result if negative. Register Fa must be F31.
See Section 4.7.7 for details of the stored result on integer overflow and inexact result.
CVTTQ Fb.rx,Fc.wq
!Floating-point Operate format
Invalid Operation
Inexact Result
Integer Overflow
CVTTQ Convert T_floating to Quadword
Rounding: Dynamic (/D)
Minus infinity (/M)
Chopped (/C)
Trapping: Exception Completion (/S)
Integer Overflow Enable (/V)
Inexact Enable (/I)