Negates the contents of a floating-point register and places the result into another floating-point register.
The fneg instruction places the negated contents of floating-point register FRB into the target FPR FRT.
The fneg instruction has two syntax forms. Each syntax form has a different effect on Condition Register Field 1.
|Syntax Form||Floating-Point Status and Control Register||Record Bit (Rc)||Condition Register Field 1|
The two syntax forms of the fneg instruction never affect the Floating-Point Status and Control Register. If the syntax form sets the Record (Rc) bit to 1, the instruction affects the Floating-Point Exception (FX), Floating-Point Enabled Exception (FEX), Floating-Point Invalid Operation Exception (VX), and Floating-Point Overflow Exception (OX) bits in Condition Register Field 1.
|FRT||Specifies target floating-point register for operation.|
|FRB||Specifies source floating-point register for operation.|
# Assume FPR 5 contains 0x400C 0000 0000 0000. fneg 6,5 # FPR 6 now contains 0xC00C 0000 0000 0000.
# Assume FPR 4 contains 0xC053 4000 0000 0000. fneg. 6,4 # FPR 6 now contains 0x4053 4000 0000 0000. # CR now contains 0x0000 0000.
Floating-Point Move Instructions.
Interpreting the Contents of a Floating-Point Register.