GAS AT&T non-constant expresssion

Does anyone knows how to solve the error I've encountered?

This is the codes I'll have to assemble it into .o


	# 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

	.local b1b, c1b


	## Do a forward FFT only


	.if      type EQ 1

		call    x32_fft

		jmp     xmiddle_1

        .endif


	## Do a squaring


	.if      type EQ 2

		call    x32_fft

		call    xmiddle_2

	##      jmp     x32_finish_unfft

	.endif


	## Do a multiply


	.if      type EQ 3

		call    x32_fft

		call    xmiddle_3

		jmp     x32_finish_unfft

	.endif


	## Do a multiply with pre-FFTed inputs


	.if      type EQ 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


	.if      type EQ 1

	x32_fft: 

	        copy_7_words

		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


	.if      type EQ 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

        .endif

        .endm

    

        fft32

	.end

and this is the error I got when I assembled it.

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

test5.mac:106: Error: non-constant expression in ".if" statement

test5.mac:106: Error: junk at end of line, first unrecognized character is `E'

Anyone knows how to solve this problem?