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fload

retrieve float from local variable

Jasmin Syntax


    fload <varnum>
or
    wide
    fload <varnum>
In the first form, <varnum> is an unsigned integer in the range 0 to 0xFF. In the second (wide) form, <varnum> is an unsigned integer in the range 0 to 0xFFFF.

Stack

Before

After
...
float-value

...


Description

Pushes the float value held in a local variable onto the operand stack. The fload instruction takes a single parameter, <varnum>, an unsigned integer which indicates which local variable to retrieve. The single-word float held in that local variable is retrieved and placed on the stack. <varnum> must be a valid local variable number in the current frame.

Example


fconst_2        ; push 2.0 onto the stack
fstore 1        ; pop 2.0 off of the stack and store in local variable 1
fload 1         ; push the value from local variable 1 (the value 2.0)
                ; back onto the stack
Bytecode

For local variable numbers in the range 0-255, use:

Type

Description
u1
fload opcode = 0x17 (23)
u1
<varnum>
There is also a wide format for this instruction, which supports access to all local variables from 0 to 65535:

Type

Description
u1
wide opcode = 0xC4 (196)
u1
fload opcode = 0x17 (23)
u2
<varnum>
See Also

iload, lload, aload, dload, wide


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Java Virtual Machine, by Jon Meyer and Troy Downing, O'Reilly Associates