fneg : negate a float : index : visitInsn()

Description

Removes the top single-precision float from the operand stack, negates it (i.e. inverts its sign), and pushes the negated result back onto the stack.

Note that, in IEEE floating point arithmetic, negation is not quite the same as subtracting from 0. IEEE has two zeros, +0.0 and -0.0. fneg applied to +0.0 is -0.0, whereas (+0.0 minus +0.0) is +0.0.

See also

ineg lneg dneg

Stack

Before	After
value	value
...	...

Bytecode

Type	Description
u1	fneg opcode = 0x76 (118)