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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