Calling macro in GAS AT&T syntax

[syn_stanzer]

May I knw the way of calling macro in GAS AT&T syntax?
This is my codes, I wanted to call the macro itself to clarify the accuracy of the codes. Thanks


# Copyright 1998-2004 - Just For Fun Software, Inc., all rights reserved
# Author: George Woltman
# Email: woltman@alum.mit.edu
#

# ************************************************** ******
# ************************************************** ******
# ******************** FFT MACROS **********************
# ************************************************** ******
# ************************************************** ******

## Perform a 32-element FFT.

.macro fft32 type
.local b1b, c1b

## Do a forward FFT only

.ifc type, 1
call x32_fft
jmp xmiddle_1
.endif

## Do a squaring

.ifc type, 2
call x32_fft
call xmiddle_2
## jmp x32_finish_unfft
.endif

## Do a multiply

.ifc type, 3
call x32_fft
call xmiddle_3
jmp x32_finish_unfft
.endif

## Do a multiply with pre-FFTed inputs

.ifc type, 4
call xmiddle_4
jmp x32_finish_unfft
.endif

## Do FFT levels 1,2,3
## Values 0-31 is real data.
##
## On input the 32-byte cache lines hold these data values:
## 0 16 1 17
## 2 ...
## ... ...
## 14 ...
## On output the 32-byte cache lines hold these data values:
## 0 4 1 5
## 2 ...
## 8 ...
## ...

## Do 4 eight_reals_first_fft macros
## distance between fft data elements is 4

.ifc type, 1
x32_fft:
copy_7_words ## macro
subl %eax,%eax
b1b: disp eight_reals_first_fft, 4*dist1, 8*dist1, 8
leal dist1(%esi),%esi ## Next source pointer
addb $256/4, %al ## Test loop counter
jnc b1b ## Iterate if necessary
leal esi-4*dist1,%esi ## Restore source pointer

## End common FFT code

ret
.endif

## Do inverse FFT levels 1,2,3
## On input the 32-byte cache lines hold these data values:
## 0 4 1 5
## 2 ...
## 8 ...
## ...
## On output the 32-byte cache lines hold these data values:
## 0 16 1 17
## 2 ...
## ... ...
## 14 ...

## Do 4 eight_reals_last_unfft macros
## distance between fft data elements is 4

.ifc type, 2
x32_finish_unfft:
c1b: disp eight_reals_last_unfft, 8, 4*dist1, 8*dist1
leal dist1(%esi),%esi ## Next source pointer
addb $256/4, %al ## Test loop counter
jnc c1b ## Iterate if necessary
leal esi-4*dist1,%esi ## Restore source pointer

fft_3_ret ## macro
.endif
.endm

fft32 2 ## call the macro itself, fft32

.end