fcmpg : single-precision float comparison (1 on NaN) : index : visitInsn()

Description

This takes two single-precision floating point numbers off the stack and compares them, using IEEE 754 rules.

If the two numbers are the same, the integer 0 is pushed onto the stack. If value2 is greater than value1, the integer 1 is pushed onto the stack. If value1 is greater than value2, the integer -1 is pushed onto the stack. If either number is NaN, the integer 1 is pushed onto the stack. +0.0 and -0.0 are treated as equal.

Example

fload_1       ; push the float in local variable 1
fconst_0      ; push the float 0 onto the stack
fcmpl         ; compare the two numbers
; The integer result on the stack is:
;     0 if local variable 1 equals 0
;     -1 if local variable 1 is less than 0
;     1 if local variable 1 is greater than 0

Notes

This instruction is identical to fcmpl except for the treatment of NaN.

See also

lcmp fcmpl dcmpl dcmpg

Stack

Before	After
value1	int-result
value2	...
...	...

Bytecode

Type	Description
u1	fcmpg opcode = 0x96 (150)