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pass1scr.mac
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; Copyright 1998-2011 - Mersenne Research, Inc. All rights reserved
; Author: George Woltman
; Email: [email protected]
;
; These macros do the first pass of two-pass FFTs. These macros are
; the same as in pass1.mac except that FFT data is copied to and from
; a scratch area.
;
; ********************************************************
; ********************************************************
; ******************* PASS 1 MACROS ********************
; ********************************************************
; ********************************************************
;;***********************************************************************
;; Pass 1 macros
;;
;; p2cl = number of cache lines in a pass 2 block
;; clm = cache line multiplier (num cache lines processed each iteration)
;;***********************************************************************
;; Perform a 10K-element FFT. This is done in two passes. Pass 1
;; does 6 levels, pass 2 uses common code to perform the last 8 levels.
pass1levels6pfa5 MACRO pass2_macro, p2cl, clmarg
LOCAL b0b, b1b, b2b, b3b, b4b, b5b, c0b, c1b, c2b, c3b, c4b, c5b
LOCAL pass2, copyback, yes_fft, no_fft, more, fftdn, fftdn1
set_FFT_constants clmarg
;; Call FFT code unless the FFT has already been started
clear_timers
cmp DWORD PTR [esi-28][ebx], 0 ;; Test FFT-started flag
jne pass2 ;; Jump is FFT already started
mov norm_ptr1, 0 ;; Set FFT-ing flag
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
copy_7_words
jmp b0b ;; Do the pass 1 fft
;; Do the last 8 FFT levels
;; do 1 pass2_8_levels_real and 19 pass2_8_levels_complex
pass2: start_timer 0
CALLP pass2_macro
end_timer 0
cmp ffttype, 1 ;; We're done if FFTing only
je gw_finish_fft
;; Do the inverse FFT
start_timer 1
fldz ;; Init SUMOUT
fstp SUMOUT
mov edx, norm_biglit_array ;; Addr of the big/little flags array
mov norm_ptr1, edx ;; Save ptr
mov edx, norm_col_mults ;; Addr of the column multipliers
mov norm_ptr2, edx ;; Save ptr
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
;; Do inverse FFT levels 5,6
;; On input the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 1 four_real_four_semireal_unfft macros
;; distance between fft data elements is 1
c0b: start_timer 17
mov ecx, scratch_area ;; Get address of scratch area
c2b: cp_disp four_real_four_semireal_unfft, 8, blkdst, 2*blkdst, 8, clmblkdst, 2*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add dl, 256/2/clm ;; Test inner loop counter
jnc c2b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*blkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*clmblkdst];; Next dest pointer
;; Do 4 four_complex_unfft macros
;; distance between fft data elements is 1
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 4 ;; 4 iterations
c3b: cp_disp four_complex_unfft, 8, blkdst, 2*blkdst, 8, clmblkdst, 2*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add dl, 256/2/clm ;; Test loop counter
jnc c3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*blkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*clmblkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al ;; Test outer loop counter
jnz c3b ;; Iterate if necessary
lea ecx, [esi-5*4*blkdst] ;; Create prefetch pointer
mov esi, scratch_area ;; Restore source pointer
end_timer 17
;; Do inverse FFT levels 4
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 1 eight_reals_unfft_1 macros
;; distance between fft data elements is 4
start_timer 18
c4b: disp eight_reals_unfft_1, clmblkdst, 2*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc c4b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
;; Do 4 four_complex_unfft_1 macros
;; distance between fft data elements is 4
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 2 ;; 2 iterations of 2
c5b: disp four_complex_unfft_1, 2*clmblkdst, 8, 4*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz c5b
lea esi, [esi-2*8*clmblkdst-4*clmblkdst];; Restore source pointer
end_timer 18
;; Do inverse FFT levels 1,2,3
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 5K 1 5K+1
;; 256
;; ...
;; 5K-256
;; Do 8 five_reals_last_unfft macros
;; distance between fft data elements is 8
start_timer 19
mov al, 4 ;; Load loop counter
c1b: two_five_reals_last_unfft 8, 4*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test loop counter
jnc c1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al ;; Test loop counter
jnz c1b ;; Iterate if necessary
lea esi, [esi-4*clmblkdst] ;; Restore source pointer
end_timer 19
;; Normalize these values
start_timer 20
mov eax, NORMRTN ;; Addr of normalization routine
call eax
sub eax, eax
end_timer 20
;; Have we been given permission to start the FFT on the result?
;; If so, do so now while the data is in the L2 cache.
cmp POSTFFT, 0 ;; Test flag
je short copyback ;; Copy data, skip FFT if flag not set
copy_3_words clm, 1
cmp edx, p2cl/128*65536+(128/clm-4/clm)*256;; Delay fft on 8 sets
jle yes_fft ;; No delay, do FFT now
;; Copy data from the scratch area back to the FFT data area
copyback:
copy_scratch_data_to_fft 20
jmp no_fft ;; Skip forward FFT code
;; Copy data from the FFT data area back to the scratch area
b0b: copy_fft_data_to_scratch 20
;; Do FFT levels 1,2,3
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 5K 1 5K+1
;; 256
;; ...
;; 5K-256
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 8 five_reals_fft macros
;; distance between fft data elements is 8
yes_fft:start_timer 21
mov eax, 4 ;; 4 iterations
b1b: two_five_reals_fft 4*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add dl, 256/2/clm ;; Test loop counter
jnc b1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al ;; Test loop counter
jnz b1b ;; Iterate if necessary
lea esi, [esi-4*clmblkdst] ;; Restore source pointer
end_timer 21
;; Do FFT levels 4
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 1 eight_reals_fft_1 macros
;; distance between fft data elements is 4
start_timer 22
b4b: disp eight_reals_fft_1, clmblkdst, 2*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b4b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
;; Do 4 four_complex_fft_1 macros
;; distance between fft data elements is 4
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 2 ;; 2 iterations of 2
b5b: disp four_complex_fft_1, 2*clmblkdst, 4*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b5b
lea esi, [esi-2*8*clmblkdst-4*clmblkdst];; Restore source pointer
end_timer 22
;; Do FFT levels 5,6
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; Do 1 four_real_four_semireal_fft macros
;; distance between fft data elements is 1
start_timer 23
;; lea ecx, [ecx-1111*blkdst] ;; Create dest ptr from prefetch ptr
b2b: cp_disp four_real_four_semireal_fft, clmblkdst, 2*clmblkdst, 8, blkdst, 2*blkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b2b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*blkdst];; Next dest pointer
;; Do 4 four_complex_fft macros
;; distance between fft data elements is 1
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 4 ;; 4 iterations
b3b: cp_disp four_complex_fft, clmblkdst, 2*clmblkdst, 8, blkdst, 2*blkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*blkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b3b
lea esi, [ecx-5*4*blkdst] ;; Restore source pointer
end_timer 23
;; Work on next 4 sets of 32 values
no_fft: lea esi, [esi+clm*2*dist1] ;; Next source pointer
dec dh ;; Test loop counter
jnz short more ;; Do more FFTs
lea esi, [esi+64] ;; Skip pad every 128 cache lines (4KB)
pfing mov ebp, clm*32 ;; Set prefetch distance
sub edx, 65536 ;; Test loop counter
jz short fftdn ;; Jump if done looping
mov dh, 128/clm ;; Restore cache line counter
more: set_prefetch_gap
cmp norm_ptr1, 0 ;; What was the loop start point?
jne c0b ;; Do inverse-FFT/norm/FFT iteration
jmp b0b ;; Do another FFT-only iteration
fftdn: lea esi, [esi-p2cl*2*dist1-p2cl/128*64];; Restore source pointer
cmp esi, DESTARG ;; If esi was not restored, then we
jne short fftdn1 ;; just finished skipped postfft data
sub ebx, ebx
mov DIST_TO_FFTSRCARG, ebx
cmp norm_ptr1, 0 ;; What was the loop start point?
je pass2 ;; FFT-only, go do pass 2
;; Split the carries into high and low carries (so they do not exceed
;; the desired number of bits per FFT word. Then add the carries back to the
;; FFT data.
start_timer 28
call gw_carries
end_timer 28
;; Have we been given permission to start the FFT on the result?
;; If so, set loop to FFT the first few cache lines now that the carries
;; have been added in.
cmp POSTFFT, 0 ;; Test flag
je short fftdn1 ;; Skip FFT code if flag not set
mov esi, DESTARG ;; Load FFT data address
mov edx, 65536+4/clm*256 ;; Do 8 previously skipped cache lines
mov norm_ptr1, 0 ;; Set flag so only forward FFT is done
copy_4_words
jmp b0b
;; Now add in the FFT'ed carries, cleanup and return
fftdn1: end_timer 1
jmp gw_finish_mult
ENDM
;; Perform a 12K-element FFT. This is done in two passes. Pass 1
;; does 6 levels, pass 2 uses common code to perform the last 8 levels.
pass1levels6pfa6 MACRO pass2_macro, p2cl, clmarg
LOCAL b0b, b1b, b2b, b3b, b4b, b5b, c0b, c1b, c2b, c3b, c4b, c5b
LOCAL pass2, copyback, yes_fft, no_fft, more, fftdn, fftdn1
set_FFT_constants clmarg
;; Call FFT code unless the FFT has already been started
clear_timers
cmp DWORD PTR [esi-28][ebx], 0 ;; Test FFT-started flag
jne pass2 ;; Jump is FFT already started
mov norm_ptr1, 0 ;; Set FFT-ing flag
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
copy_7_words
jmp b0b ;; Do the pass 1 fft
;; Do the last 8 FFT levels
;; do 1 pass2_8_levels_real and 23 pass2_8_levels_complex
pass2: start_timer 0
CALLP pass2_macro
end_timer 0
cmp ffttype, 1 ;; We're done if FFTing only
je gw_finish_fft
;; Do the inverse FFT
start_timer 1
fldz ;; Init SUMOUT
fstp SUMOUT
mov edx, norm_biglit_array ;; Addr of the big/little flags array
mov norm_ptr1, edx ;; Save ptr
mov edx, norm_col_mults ;; Addr of the column multipliers
mov norm_ptr2, edx ;; Save ptr
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
;; Do inverse FFT levels 5,6
;; On input the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 1 four_real_four_semireal_unfft macros
;; distance between fft data elements is 1
c0b: start_timer 17
mov ecx, scratch_area ;; Get address of scratch area
c2b: cp_disp four_real_four_semireal_unfft, 8, blkdst, 2*blkdst, 8, clmblkdst, 2*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add dl, 256/2/clm ;; Test inner loop counter
jnc c2b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*blkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*clmblkdst];; Next dest pointer
;; Do 5 four_complex_unfft macros
;; distance between fft data elements is 1
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 5 ;; 5 iterations
c3b: cp_disp four_complex_unfft, 8, blkdst, 2*blkdst, 8, clmblkdst, 2*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add dl, 256/2/clm ;; Test loop counter
jnc c3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*blkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*clmblkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al ;; Test outer loop counter
jnz c3b ;; Iterate if necessary
lea ecx, [esi-6*4*blkdst] ;; Create prefetch pointer
mov esi, scratch_area ;; Restore source pointer
end_timer 17
;; Do inverse FFT levels 4
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 2 four_real_four_semireal_unfft_1 macros
;; distance between fft data elements is 4
start_timer 18
mov al, 2 ;; Load loop counter
c4b: disp four_real_four_semireal_unfft_1, 2*clmblkdst, 8, 4*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc c4b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al
jnz c4b
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
;; Do 4 four_complex_unfft_1 macros
;; distance between fft data elements is 4
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 2 ;; 2 iterations of 2
c5b: disp four_complex_unfft_1, 2*clmblkdst, 8, 4*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz c5b
lea esi, [esi-3*8*clmblkdst] ;; Restore source pointer
end_timer 18
;; Do inverse FFT levels 1,2,3
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 6K 1 6K+1
;; 256
;; ...
;; 6K-256
;; Do 8 six_reals_last_unfft macros
;; distance between fft data elements is 8
start_timer 19
mov al, 8 ;; Load loop counter
c1b: disp six_reals_last_unfft, 8, 8*clmblkdst, 16*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test loop counter
jnc c1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al ;; Test loop counter
jnz c1b ;; Iterate if necessary
lea esi, [esi-8*clmblkdst] ;; Restore source pointer
end_timer 19
;; Normalize these values
start_timer 20
mov eax, NORMRTN ;; Addr of normalization routine
call eax
sub eax, eax
end_timer 20
;; Have we been given permission to start the FFT on the result?
;; If so, do so now while the data is in the L2 cache.
cmp POSTFFT, 0 ;; Test flag
je short copyback ;; Copy data, skip FFT if flag not set
copy_3_words clm, 1
cmp edx, p2cl/128*65536+(128/clm-4/clm)*256;; Delay fft on 8 sets
jle yes_fft ;; No delay, do FFT now
;; Copy data from the scratch area back to the FFT data area
copyback:
copy_scratch_data_to_fft 24
jmp no_fft ;; Skip forward FFT code
;; Copy data from the FFT data area back to the scratch area
b0b: copy_fft_data_to_scratch 24
;; Do FFT levels 1,2,3
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 6K 1 6K+1
;; 256
;; ...
;; 6K-256
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 8 six_reals_fft macros
;; distance between fft data elements is 8
yes_fft:start_timer 21
mov eax, 8 ;; 8 iterations
b1b: disp six_reals_fft, 8*clmblkdst, 16*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add dl, 256/2/clm ;; Test loop counter
jnc b1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al ;; Test loop counter
jnz b1b ;; Iterate if necessary
lea esi, [esi-8*clmblkdst] ;; Restore source pointer
end_timer 21
;; Do FFT levels 4
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 2 four_real_four_semireal_fft_1 macros
;; distance between fft data elements is 4
start_timer 22
mov al, 2 ;; Load loop counter
b4b: disp four_real_four_semireal_fft_1, 2*clmblkdst, 4*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b4b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
dec al
jnz b4b
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
;; Do 4 four_complex_fft_1 macros
;; distance between fft data elements is 4
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 2 ;; 2 iterations of 2
b5b: disp four_complex_fft_1, 2*clmblkdst, 4*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b5b
lea esi, [esi-3*8*clmblkdst] ;; Restore source pointer
end_timer 22
;; Do FFT levels 5,6
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; Do 1 four_real_four_semireal_fft macros
;; distance between fft data elements is 1
start_timer 23
; lea ecx, [ecx-1111*blkdst] ;; Create dest ptr from prefetch ptr
b2b: cp_disp four_real_four_semireal_fft, clmblkdst, 2*clmblkdst, 8, blkdst, 2*blkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b2b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*blkdst];; Next dest pointer
;; Do 5 four_complex_fft macros
;; distance between fft data elements is 1
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 5 ;; 5 iterations
b3b: cp_disp four_complex_fft, clmblkdst, 2*clmblkdst, 8, blkdst, 2*blkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*blkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b3b
lea esi, [ecx-6*4*blkdst] ;; Restore source pointer
end_timer 23
;; Work on next 4 sets of 32 values
no_fft: lea esi, [esi+clm*2*dist1] ;; Next source pointer
dec dh ;; Test loop counter
jnz short more ;; Do more FFTs
lea esi, [esi+64] ;; Skip pad every 128 cache lines (4KB)
pfing mov ebp, clm*32 ;; Set prefetch distance
sub edx, 65536 ;; Test loop counter
jz short fftdn ;; Jump if done looping
mov dh, 128/clm ;; Restore cache line counter
more: set_prefetch_gap
cmp norm_ptr1, 0 ;; What was the loop start point?
jne c0b ;; Do inverse-FFT/norm/FFT iteration
jmp b0b ;; Do another FFT-only iteration
fftdn: lea esi, [esi-p2cl*2*dist1-p2cl/128*64];; Restore source pointer
cmp esi, DESTARG ;; If esi was not restored, then we
jne short fftdn1 ;; just finished skipped postfft data
sub ebx, ebx
mov DIST_TO_FFTSRCARG, ebx
cmp norm_ptr1, 0 ;; What was the loop start point?
je pass2 ;; FFT-only, go do pass 2
;; Split the carries into high and low carries (so they do not exceed
;; the desired number of bits per FFT word. Then add the carries back to the
;; FFT data.
start_timer 28
call gw_carries
end_timer 28
;; Have we been given permission to start the FFT on the result?
;; If so, set loop to FFT the first few cache lines now that the carries
;; have been added in.
cmp POSTFFT, 0 ;; Test flag
je short fftdn1 ;; Skip FFT code if flag not set
mov esi, DESTARG ;; Load FFT data address
mov edx, 65536+4/clm*256 ;; Do 8 previously skipped cache lines
mov norm_ptr1, 0 ;; Set flag so only forward FFT is done
copy_4_words
jmp b0b
;; Now add in the FFT'ed carries, cleanup and return
fftdn1: end_timer 1
jmp gw_finish_mult
ENDM
;; Perform a 12K-element all-complex FFT. This is done in two passes. Pass 1
;; does 6 levels, pass 2 uses common code to perform the last 8 levels.
pass1levels6complex3 MACRO pass2_macro, p2cl, clmarg
LOCAL b0b, b1b, b3b, b5b, c0b, c1b, c3b, c5b
LOCAL pass2, copyback, yes_fft, no_fft, more, fftdn, fftdn1
set_FFT_constants clmarg
;; Call FFT code unless the FFT has already been started
clear_timers
cmp DWORD PTR [esi-28][ebx], 0 ;; Test FFT-started flag
jne pass2 ;; Jump is FFT already started
mov norm_ptr1, 0 ;; Set FFT-ing flag
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
copy_7_words
jmp b0b ;; Do the pass 1 fft
;; Do the last 8 FFT levels
;; do 24 pass2_8_levels_complex
pass2: start_timer 0
CALLP pass2_macro
end_timer 0
cmp ffttype, 1 ;; We're done if FFTing only
je gw_finish_fft
;; Do the inverse FFT
start_timer 1
fldz ;; Init SUMOUT
fstp SUMOUT
mov edx, norm_biglit_array ;; Addr of the big/little flags array
mov norm_ptr1, edx ;; Save ptr
mov edx, norm_col_mults ;; Addr of the column multipliers
mov norm_ptr2, edx ;; Save ptr
mov edx, p2cl/128*65536+128/clm*256;; Load loop counter
pfing mov ebp, clm*32 ;; Set prefetch distance
;; Do inverse FFT levels 5,6
;; On input the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 8 four_complex_unfft macros
;; distance between fft data elements is 1
c0b: start_timer 17
mov ecx, scratch_area ;; Get address of scratch area
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 6 ;; 6 iterations
c3b: cp_disp four_complex_unfft, 8, blkdst, 2*blkdst, 8, clmblkdst, 2*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add dl, 256/2/clm ;; Test loop counter
jnc c3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*blkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*clmblkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al ;; Test outer loop counter
jnz c3b ;; Iterate if necessary
lea ecx, [esi-6*4*blkdst] ;; Create prefetch pointer
mov esi, scratch_area ;; Restore source pointer
end_timer 17
;; Do inverse FFT levels 4
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 6 four_complex_unfft_1 macros
;; distance between fft data elements is 4
start_timer 18
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 3 ;; 3 iterations of 2
c5b: disp four_complex_unfft_1, 2*clmblkdst, 8, 4*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc c5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz c5b
lea esi, [esi-3*8*clmblkdst] ;; Restore source pointer
end_timer 18
;; Do inverse FFT levels 1,2,3
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 6K 1 6K+1
;; 256
;; ...
;; 6K-256
;; Do 8 three_complex_last_unfft macros
;; distance between fft data elements is 8
start_timer 19
mov edi, plus1_premults ;; Address of premultiplier table
mov al, 8 ;; Load loop counter
c1b: three_complex_last_unfft 8, 8*clmblkdst, 16*clmblkdst
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test loop counter
jnc c1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
lea edi, [edi+48] ;; Next premultiplier pointer
dec al ;; Test loop counter
jnz c1b ;; Iterate if necessary
lea esi, [esi-8*clmblkdst] ;; Restore source pointer
end_timer 19
;; Normalize these values
start_timer 20
mov eax, NORMRTN ;; Addr of normalization routine
call eax
sub eax, eax
end_timer 20
;; Have we been given permission to start the FFT on the result?
;; If so, do so now while the data is in the L2 cache.
cmp POSTFFT, 0 ;; Test flag
je short copyback ;; Copy data, skip FFT if flag not set
copy_3_words clm, 1
cmp edx, p2cl/128*65536+(128/clm-4/clm)*256;; Delay fft on 8 sets
jle yes_fft ;; No delay, do FFT now
;; Copy data from the scratch area back to the FFT data area
copyback:
copy_scratch_data_to_fft 24
jmp no_fft ;; Skip forward FFT code
;; Copy data from the FFT data area back to the scratch area
b0b: copy_fft_data_to_scratch 24
;; Do FFT levels 1,2,3
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 6K 1 6K+1
;; 256
;; ...
;; 6K-256
;; On output the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; Do 8 three_complex_fft_premult macros
;; distance between fft data elements is 8
yes_fft:start_timer 21
mov edi, plus1_premults ;; Address of premultiplier table
mov eax, 8 ;; 8 iterations
b1b: three_complex_fft_premult 8*clmblkdst, 16*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add dl, 256/2/clm ;; Test loop counter
jnc b1b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
lea edi, [edi+48] ;; Next premultiplier pointer
dec al ;; Test loop counter
jnz b1b ;; Iterate if necessary
lea esi, [esi-8*clmblkdst] ;; Restore source pointer
end_timer 21
;; Do FFT levels 4
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 2K 1 2K+1
;; 256 ...
;; ...
;; 4K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; Do 6 four_complex_fft_1 macros
;; distance between fft data elements is 4
start_timer 22
mov edi, sincos2 ;; Load sin/cos pointer
mov eax, 3 ;; 3 iterations of 2
b5b: disp four_complex_fft_1, 2*clmblkdst, 4*clmblkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+clmblkdst];; Next source pointer
add ah, 256/2 ;; Test middle loop counter
jnc b5b ;; Iterate if necessary
lea esi, [esi-2*clmblkdst+8*clmblkdst];; Next source pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b5b
lea esi, [esi-3*8*clmblkdst] ;; Restore source pointer
end_timer 22
;; Do FFT levels 5,6
;;
;; On input the 32-byte cache lines hold these data values:
;; 0 1K 1 1K+1
;; 256 ...
;; ...
;; 2K ...
;; ...
;; On output the 32-byte cache lines hold these data values:
;; 0 256 1 257
;; 512 ...
;; ...
;; Do 6 four_complex_fft macros
;; distance between fft data elements is 1
start_timer 23
; lea ecx, [ecx-1111*blkdst] ;; Create dest ptr from prefetch ptr
mov edi, sincos1 ;; Load sin/cos pointer
mov al, 6 ;; 6 iterations
b3b: cp_disp four_complex_fft, clmblkdst, 2*clmblkdst, 8, blkdst, 2*blkdst, 8
lea esi, [esi+dist1] ;; Next source pointer
lea ecx, [ecx+dist1] ;; Next dest pointer
add al, 256/2/clm ;; Test inner loop counter
jnc b3b ;; Iterate if necessary
lea esi, [esi-clm*2*dist1+4*clmblkdst];; Next source pointer
lea ecx, [ecx-clm*2*dist1+4*blkdst];; Next dest pointer
lea edi, [edi+SCD] ;; Next sine/cosine pointer
dec al
jnz b3b
lea esi, [ecx-6*4*blkdst] ;; Restore source pointer
end_timer 23
;; Work on next 4 sets of 32 values
no_fft: lea esi, [esi+clm*2*dist1] ;; Next source pointer
dec dh ;; Test loop counter
jnz short more ;; Do more FFTs
lea esi, [esi+64] ;; Skip pad every 128 cache lines (4KB)
pfing mov ebp, clm*32 ;; Set prefetch distance
sub edx, 65536 ;; Test loop counter