forked from KolibriOS/kolibrios
a test version with FFT library inside kernel
git-svn-id: svn://kolibrios.org@1626 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Artem Jerdev (art_zh)
parent
2e0a186ba0
commit
8c44a1652a
@ -76,10 +76,10 @@ align 32
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syscall_entry:
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; push ecx
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sti
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xor eax, 3
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and eax, 3
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call dword [servetable3 + eax * 4]
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; pop ecx
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; pop ecx
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sysret
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iglobal
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@ -187,8 +187,8 @@ iglobal
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align 4
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servetable3:
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dd paleholder ; 0
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dd paleholder ; 1
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dd FFT4 ; 0
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dd FFT4 ; 1
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dd paleholder ; 2
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dd sys_end ; last
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@ -244,6 +244,7 @@ include "fs/ext2.inc" ; read / write for ext2 filesystem
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; sound
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include "sound/playnote.inc" ; player Note for Speaker PC
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include "sound/FFT.inc" ; fast Fourier transform routines
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; display
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760
kernel/branches/Kolibri-A/trunk/sound/FFT.inc
Normal file
760
kernel/branches/Kolibri-A/trunk/sound/FFT.inc
Normal file
@ -0,0 +1,760 @@
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; Fast Hartley Transform routine
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; Copyright (C) 1999, 2004, 2010
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; Artem Jerdev artem@jerdev.co.uk
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;
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; free KolibriOS version - not to be ported to other OSes
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; ==========================================================
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Power_of_4 equ 5
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NumPoints equ 1024
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N_2 equ NumPoints / 2
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N_4 equ NumPoints / 4
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;=================================================================
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; global constants
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align 8
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_root dq 1.41421356237309504880169 ; = sqrt(2)
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_root2 dq 0.70710678118654752440084 ; = sqrt(2)/2
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_c1 dq 0.92387953251128675612818 ; = cos(pi/8)
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_s1 dq 0.38268343236508977172846 ; = sin(pi/8)
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_dx dq 0.00613592315154296875 ; pi/512
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;[_CosTable] dd 0 ; N_2 elements
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;[_SinTable] dd 0 ; N_2 elements
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;; ==========================
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align 4
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MakeSinCosTable:
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mov ebx, [_Sines]
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mov ecx, [_Cosins]
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xor eax, eax
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fld [_dx] ; st : dx
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fldz ; st : 0, dx
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.loop:
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fld st0 ; st : x, x, dx
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FSINCOS ; st : cos, sin, x, dx
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fstp qword [ecx+eax*8] ; st : sin, x, dx
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fstp qword [ebx+eax*8] ; st : x, dx
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fadd st0, st1 ; st : x+dx, dx
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inc eax
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cmp eax, N_2
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jne .loop
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fstp st0 ; st : dx
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fstp st0 ; st : <empty>
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ret
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; ================================================================
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align 4
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BitInvert:
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mov esi, [x] ; array of qwords
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xor ecx, ecx ; index term
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.newterm:
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inc ecx
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cmp ecx, NumPoints
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jge .done
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xor eax, eax
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mov edx, ecx
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xor bl, bl
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.do_invert:
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inc bl
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cmp bl, Power_of_4
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jg .switch
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mov bh, dl
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and bh, 3
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shl eax, 2
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or al, bh
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shr edx, 2
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jmp .do_invert
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.switch:
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cmp eax, ecx
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jle .newterm
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fld qword [esi+eax*8]
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fld qword [esi+ecx*8]
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fstp qword [esi+eax*8]
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fstp qword [esi+ecx*8]
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jmp .newterm
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.done:
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ret
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;=================================================================
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align 4
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step1:
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mov esi, [x]
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mov ebx, esi
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add esi, NumPoints*8
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.loop:
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fld qword[ebx]
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fld qword[ebx+8]
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fld st1
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fsub st0, st1 ; st : t2, f[i+1], f[i]
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fxch st1 ; st : f[i+1], t2, f[i]
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faddp st2, st0 ; st : t2, t1
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fld qword[ebx+16]
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fld qword[ebx+24]
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fld st1 ; st : f[i+2], f[i+3], f[i+2], t2, t1
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fadd st0, st1 ; st : t3, f[i+3], f[i+2], t2, t1
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fxch st2 ; st : f[i+2], f[i+3], t3, t2, t1
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fsub st0, st1 ; st : t4, f[i+3], t3, t2, t1
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fstp st1 ; st : t4, t3, t2, t1
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fld st2 ; st : t2, t4, t3, t2, t1
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fadd st0, st1 ; st : t2+t4, t4, t3, t2, t1
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fstp qword[ebx+16] ; st : t4, t3, t2, t1
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fsubp st2, st0 ; st : t3, t2-t4, t1
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fld st2 ; st : t1, t3, t2-t4, t1
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fadd st0, st1 ; st : t1+t3, t3, t2-t4, t1
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fstp qword[ebx] ; st : t3, t2-t4, t1
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fsubp st2, st0 ; st : t2-t4, t1-t3
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fstp qword[ebx+24] ; st : t1-t3
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fstp qword[ebx+8] ; st : <empty>
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add ebx, 32
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cmp ebx, esi
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jnz .loop
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ret
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;
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;===========================================================================
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step2: ; Step2
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;===========================================================================
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mov eax, [_f]
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mov ebx, eax
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add eax, NumPoints*8
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.loop_i:
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; -- quad subelements +0, +4, +8 and +12 (simpliest operations)
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fld qword[ebx]
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fld qword[ebx+8*4]
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fld st0
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fadd st0, st2 ; st : t1, f_4, f_0
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fxch st1
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fsubp st2, st0 ; st : t1, t2
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fld qword[ebx+8*8]
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fld qword[ebx+8*12]
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fld st0
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fadd st0, st2 ; st : t3, f_12, t1, t2
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fxch st1
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fsubp st2, st0 ; st : t3, t4, t1, t2
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; ------
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fld st2 ; st : t1, t3, t4, t1, t2
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fadd st0, st1
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fstp qword[ebx] ; st : t3, t4, t1, t2
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fsub st0, st2 ; st : t3-t1, t4, t1, t2
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fchs ; st : t1-t3, t4, t1, t2
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fstp qword[ebx+8*4] ; st : t4, t1, t2
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fst st1 ; st : t4, t4, t2
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fadd st0, st2 ; st : t2+t4, t4, t2
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fstp qword[ebx+8*8] ; st : t4, t2
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fsubp st1, st0 ; st : t2-t4
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fstp qword[ebx+8*12] ; st : <empty>
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; -- even subelements +2, +6, +10 and +14 (2 multiplications needed)
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fld qword[ebx+8*2]
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fld qword[ebx+8*6]
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fld [_root]
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fmul st1, st0 ; st : r, t2, t1
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fld qword[ebx+8*10]
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fxch st1 ; st : r, t3, t2, t1
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fmul qword[ebx+8*14] ; st : t4, t3, t2, t1
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; ------
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fld st3 ; st : t1, t4, t3, t2, t1
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fadd st0, st3 ;
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fadd st0, st2 ;
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fst qword[ebx+8*2] ; store f[i+8] = t1+t2+t3
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fsub st0, st3 ;
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fsub st0, st3 ;
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fstp qword[ebx+8*10] ; store f[i+10]= t1-t2+t3
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fld st3 ; st : t1, t4, t3, t2, t1
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fsub st0, st2 ;
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fsub st0, st1 ;
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fst qword[ebx+8*14] ; store f[i+14]= t1-t3-t4
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fadd st0, st1 ;
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faddp st1, st0 ; st : t1-t3+t4, t3, t2, t1
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fstp qword[ebx+8*6] ; store f[i+6]
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fstp st0 ; st : t2, t1
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fstp st0 ; st : t1
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fstp st0 ; st : <empty>
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; -- odd subelements
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fld qword[ebx+8*9]
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fld qword[ebx+8*11]
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fld st1
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fsub st0, st1
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fxch st1
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faddp st2, st0 ; st : (f[l3]-f[l7]), (f[l3]+f[l7])
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fld [_root2]
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fmul st2, st0
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fmulp st1, st0 ; st : t9, t6
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fld qword[ebx+8*3]
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fld st0
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fadd st0, st2 ; st : t1, f[l5], t9, t6
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fstp [_t1]
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fsub st0, st1
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fstp [_t2]
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fstp [_t9] ; (t9 never used)
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fstp [_t6] ; st : <empty>
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fld [_c1]
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fld [_s1]
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fld qword[ebx+8*5]
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fld qword[ebx+8*7]
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fld st3 ; st: c1, f[l6], f[l2], s1, c1
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fmul st0, st2 ; st: f_2*c, f_6, f_2, s, c
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fld st1 ; st: f_6, f_2*c, f_6, f_2, s, c
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fmul st0, st4 ; st: f_6*s, f_2*c, f_6, f_2, s, c
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faddp st1, st0 ; st: t5, f_6, f_2, s, c
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fstp [_t5] ; st: f_6, f_2, s, c
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fld st3 ; st: c, f_6, f_2, s, c
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fmul st0, st1
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fld st3
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fmul st0, st3 ; st: f_2*s, f_6*c, f_6, f_2, s, c
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fsubp st1, st0 ; st: t8, f_6, f_2, s, c
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fstp [_t8] ; st: f_6, f_2, s, c
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fstp st0 ; st: f_2, s, c
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fstp st0 ; st: s, c
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fld qword[ebx+8*13]
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fld qword[ebx+8*15]
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fld st3 ; st: c1, f[l8], f[l4], s1, c1
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fmul st0, st1
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fld st3
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fmul st0, st3 ; st: f_4*s, f_8*c, f_8, f_4, s, c
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faddp st1, st0 ; st: t7, f_8, f_4, s, c
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fld [_t5] ; st: t5, t7, f_8, f_4, s, c
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fsub st0, st1 ; st: t4, t7, f_8, f_4, s, c
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fstp [_t4]
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fstp [_t7] ; st: f_8, f_4, s, c
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fld st3 ; st: c, f_8, f_4, s, c
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fmul st0, st2
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fld st3
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fmul st0, st2 ; st: f_8*s, f_4*c, f_8, f_4, s, c
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fsubp st1, st0 ; st:-t0, f_8, f_4, s, c
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fchs
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fld [_t8]
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fchs ; st:-t8, t0, f_8, f_4, s, c
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fsub st0, st1 ; st: t3, t0, f_8, f_4, s, c
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fstp [_t3]
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fstp [_t0] ; st: f_8, f_4, s, c
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fstp st0 ; st: f_4, s, c
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fstp st0 ; st: s, c
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fstp st0 ; st: c
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fstp st0 ; st: <empty>
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fld [_t1]
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fld [_t4]
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fld st1
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fsub st0, st1
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fstp qword[ebx+8*11] ; f[l7] = t1-t4
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faddp st1, st0
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fstp qword[ebx+8*3] ; f[l5] = t1+t4
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fld [_t2]
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fld [_t3]
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fld st1
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fsub st0, st1
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fstp qword[ebx+8*15] ; f[l8]
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faddp st1, st0
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fstp qword[ebx+8*7] ; f[l6]
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fld [_t6]
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fld qword[ebx+8]
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fld st1
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fsub st0, st1
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fxch st1
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faddp st2, st0 ; st : t2, t1
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fld [_t8]
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fsub [_t0]
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fld [_t5]
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fadd [_t7] ; st : t4, t3, t2, t1
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fld st3
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fsub st0, st1
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fstp qword[ebx+8*9] ; f[l3] = t1-t4
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fadd st0, st3
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fstp qword[ebx+8] ; f[l1] = t1+t4
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fld st1 ; st : t2, t3, t2, t1
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fsub st0, st1 ; f[l4] = t2-t3
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fstp qword[ebx+8*13] ; st : t3, t2, t1
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faddp st1, st0 ; st : t2+t3, t1
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fstp qword[ebx+8*5] ; f[l2] = t2+t3
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fstp st0 ; st : <empty>
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add ebx, 16*8
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cmp ebx, eax
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jb .loop_i
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ret
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align 8 ; shared local vars
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_t0 dq 0
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_t1 dq 0
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_t2 dq 0
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_t3 dq 0
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_t4 dq 0
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_t5 dq 0
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_t6 dq 0
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_t7 dq 0
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_t8 dq 0
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_t9 dq 0
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;===================================================================
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step3:
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;===================================================================
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; 283 : {
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; 293 : for (l=3; l<=p; l++)
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mov cx, 0x0200
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.newstep:
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inc ch
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cmp ch, Power_of_4
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jg .done
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mov [.step], cx
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; 294 : {
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; 295 : d1 = 1 << (l + l - 3);
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mov cl, ch
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add cl, cl
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sub cl, 3
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mov edx, 1
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shl edx, cl
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mov [.d1], edx
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; 296 : d2 = d1 << 1;
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shl edx, 1
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mov [.d2], edx
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mov eax, edx
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; 297 : d3 = d2 << 1;
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shl edx, 1
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mov [.d3], edx
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; 298 : d4 = d2 + d3;
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add eax, edx
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mov [.d4], eax
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; 299 : d5 = d3 << 1;
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shl edx, 1
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mov [.d5], edx
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shl edx, 3
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mov [.d6], edx ; d6 = d5*8 to simplify index operations
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; 339 : j5 = N / d5; ; moved out of internal loop
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mov cl, Power_of_4
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sub cl, ch
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add cl, cl
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mov edx, 1
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shl edx, cl
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mov [.j5], edx
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; 300 :
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; 301 : for (j=0; j<N; j+=d5)
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mov esi, [_f]
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mov ebx, esi
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add esi, NumPoints*8
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mov [.end_of_array], esi
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.next_j:
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; {
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; t1 = f[j] + f[j+d2];
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mov eax, [.d2]
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fld qword[ebx]
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fld qword[ebx+eax*8]
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fld st1
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fadd st0, st1
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fstp [_t1]
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; t2 = f[j] - f[j+d2];
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fsubp st1, st0
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fstp [_t2]
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; t3 = f[j+d3] + f[j+d4];
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mov edi, [.d3]
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fld qword[ebx+edi*8]
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mov edx, [.d4]
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fld qword[ebx+edx*8]
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fld st1
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fsub st0, st1 ; st : t4, f4, f3
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fxch st1 ; st : f4, t4, f3
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; t4 = f[j+d3] - f[j+d4];
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faddp st2, st0 ; st : t4, t3
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; f[j+d4] = t2 - t4;
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; f[j+d3] = t2 + t4;
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fld [_t2]
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fld st0
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fsub st0, st2 ; st : f4, t2, t4, t3
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fstp qword[ebx+edx*8] ; st : t2, t4, t3
|
||||
fadd st0, st1 ; st : f3, t4, t3
|
||||
fstp qword[ebx+edi*8] ; st : t4, t3
|
||||
|
||||
; f[j+d2] = t1 - t3;
|
||||
; f[j] = t1 + t3;
|
||||
fld [_t1]
|
||||
fst st1
|
||||
fsub st0, st2 ; st : f2, t1, t3
|
||||
fstp qword[ebx+eax*8] ; st : t1, t3
|
||||
fadd st0, st1 ; st : f0, t3
|
||||
fstp qword[ebx] ; st : t3
|
||||
fstp st0
|
||||
|
||||
; jj = j + d1; / ??
|
||||
mov edi, [.d1]
|
||||
shl edi, 3 ; = d1*8
|
||||
mov edx, edi
|
||||
mov eax, edi
|
||||
add eax, eax ; eax = d2*8
|
||||
shl edx, 2 ; = d3*8
|
||||
add edi, ebx ; now [edi] points to f[jj]
|
||||
add edx, edi ; and [edx] points to f[jj+d3]
|
||||
|
||||
; t1 = f[jj];
|
||||
fld qword [edi] ; st : t1
|
||||
; t3 = f[jj+d3];
|
||||
fld qword [edx] ; st : t3, t1
|
||||
|
||||
; t2 = f[jj+d2] * r;
|
||||
fld qword [edi+eax]
|
||||
fld [_root]
|
||||
fmul st1, st0 ; st : r, t2, t3, t1
|
||||
; t4 = f[jj+d4] * r
|
||||
fmul qword [edx+eax] ; st : t4, t2, t3, t1
|
||||
|
||||
; f[jj] = t1 + t2 + t3;
|
||||
fld st3 ; st : t1, t4, t2, t3, t1
|
||||
fadd st0, st3
|
||||
fadd st0, st2
|
||||
fstp qword [edi]
|
||||
|
||||
; f[jj+d2] = t1 - t3 + t4;
|
||||
fld st3
|
||||
fsub st0, st3 ; st : (t1-t3), t4, t2, t3, t1
|
||||
fld st0
|
||||
fadd st0, st2 ; st : f2, (t1-t3), t4, t2, t3, t1
|
||||
fstp qword [edi+eax]
|
||||
; f[jj+d4] = t1 - t3 - t4;
|
||||
fsub st0, st1 ; st : f4, t4, t2, t3, t1
|
||||
fstp qword [edx+eax]
|
||||
|
||||
; f[jj+d3] = t1 - t2 + t3;
|
||||
fstp st0 ; st : t2, t3, t1
|
||||
fsubp st1, st0 ; st : (t3-t2), t1
|
||||
faddp st1, st0 ; st : f3
|
||||
fstp qword [edx]
|
||||
|
||||
; for (k=1; k<d1; k++)
|
||||
xor ecx, ecx ; ecx = k
|
||||
mov [.jj], ecx
|
||||
.next_k:
|
||||
inc ecx
|
||||
cmp ecx, [.d1]
|
||||
jge .done_k
|
||||
; {
|
||||
mov eax, [.d2] ; the sector increment
|
||||
; l1 = j + k;
|
||||
mov edx, ecx
|
||||
mov [.l1], edx ; [ebx+edx*8] --> f[j+k]
|
||||
; l2 = l1 + d2;
|
||||
add edx, eax
|
||||
mov [.l2], edx
|
||||
; l3 = l1 + d3;
|
||||
add edx, eax
|
||||
mov [.l3], edx
|
||||
; l4 = l1 + d4;
|
||||
add edx, eax
|
||||
mov [.l4], edx
|
||||
|
||||
; l5 = j + d2 - k;
|
||||
mov edx, eax
|
||||
sub edx, ecx
|
||||
mov [.l5], edx
|
||||
; l6 = l5 + d2;
|
||||
add edx, eax
|
||||
mov [.l6], edx
|
||||
; l7 = l5 + d3;
|
||||
add edx, eax
|
||||
mov [.l7], edx
|
||||
; l8 = l5 + d4;
|
||||
add edx, eax
|
||||
mov [.l8], edx
|
||||
|
||||
|
||||
; 340 : j5 *= k; // add-substituted multiplication
|
||||
mov eax, [.jj]
|
||||
add eax, [.j5]
|
||||
mov [.jj], eax
|
||||
|
||||
; c1 = C[jj];
|
||||
; s1 = S[jj];
|
||||
mov edi, [_Cosins]
|
||||
fld qword[edi+eax*8]
|
||||
mov esi, [_Sines]
|
||||
fld qword[esi+eax*8] ; st : s1, c1
|
||||
|
||||
; t5 = f[l2] * c1 + f[l6] * s1;
|
||||
; t8 = f[l6] * c1 - f[l2] * s1;
|
||||
mov edx, [.l6]
|
||||
fld qword[ebx+edx*8]
|
||||
mov edx, [.l2]
|
||||
fld st0
|
||||
fmul st0, st2
|
||||
fxch st1
|
||||
fmul st0, st3
|
||||
fld qword[ebx+edx*8] ; st : f[l2], f[l6]*c, f[l6]*s, s, c
|
||||
fmul st4, st0
|
||||
fmulp st3, st0 ; st : f[l6]*c, f[l6]*s, f[l2]*s, f[l2]*c
|
||||
fsub st0, st2 ; st : t8, f[l6]*s, f[l2]*s, f[l2]*c
|
||||
fstp [_t8]
|
||||
faddp st2, st0 ; st : f[l2]*s, t5
|
||||
fstp st0 ; st : t5
|
||||
fstp [_t5] ; st : <empty>
|
||||
|
||||
; c2 = C[2*jj];
|
||||
; s2 = S[2*jj];
|
||||
shl eax, 1
|
||||
fld qword[edi+eax*8]
|
||||
fld qword[esi+eax*8] ; st : s2, c2
|
||||
|
||||
; t6 = f[l3] * c2 + f[l7] * s2;
|
||||
; t9 = f[l7] * c2 - f[l3] * s2;
|
||||
mov edx, [.l7]
|
||||
fld qword[ebx+edx*8]
|
||||
mov edx, [.l3]
|
||||
fld st0
|
||||
fmul st0, st2
|
||||
fxch st1
|
||||
fmul st0, st3
|
||||
fld qword[ebx+edx*8] ; st : f[l3], f[l7]*c, f[l7]*s, s, c
|
||||
fmul st4, st0
|
||||
fmulp st3, st0 ; st : f[l7]*c, f[l7]*s, f[l3]*s, f[l3]*c
|
||||
fsub st0, st2 ; st : t9, f[l7]*s, f[l3]*s, f[l3]*c
|
||||
fstp [_t9]
|
||||
faddp st2, st0 ; st : f[l2]*s, t6
|
||||
fstp st0 ; st : t6
|
||||
fstp [_t6] ; st : <empty>
|
||||
|
||||
; c3 = C[3*jj];
|
||||
; s3 = S[3*jj];
|
||||
add eax, [.jj]
|
||||
fld qword[edi+eax*8]
|
||||
fld qword[esi+eax*8] ; st : s3, c3
|
||||
|
||||
; t7 = f[l4] * c3 + f[l8] * s3;
|
||||
; t0 = f[l8] * c3 - f[l4] * s3;
|
||||
mov edx, [.l8]
|
||||
fld qword[ebx+edx*8]
|
||||
mov edx, [.l4]
|
||||
fld st0
|
||||
fmul st0, st2
|
||||
fxch st1
|
||||
fmul st0, st3
|
||||
fld qword[ebx+edx*8] ; st : f[l4], f[l8]*c, f[l8]*s, s, c
|
||||
fmul st4, st0
|
||||
fmulp st3, st0 ; st : f[l8]*c, f[l8]*s, f[l4]*s, f[l4]*c
|
||||
fsub st0, st2 ; st : t9, f[l8]*s, f[l4]*s, f[l4]*c
|
||||
fstp [_t0]
|
||||
faddp st2, st0 ; st : f[l2]*s, t7
|
||||
fstp st0 ; st : t7
|
||||
fstp [_t7] ; st : <empty>
|
||||
|
||||
; t1 = f[l5] - t9;
|
||||
; t2 = f[l5] + t9;
|
||||
mov eax, [.l5]
|
||||
fld qword [ebx+eax*8]
|
||||
fld [_t9]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp [_t2]
|
||||
fsubp st1, st0
|
||||
fstp [_t1]
|
||||
|
||||
; t3 = - t8 - t0;
|
||||
fld [_t8]
|
||||
fadd [_t0]
|
||||
fchs
|
||||
fstp [_t3]
|
||||
; t4 = t5 - t7;
|
||||
fld [_t5]
|
||||
fsub [_t7]
|
||||
fstp [_t4]
|
||||
|
||||
; f[l5] = t1 + t4;
|
||||
fld [_t1]
|
||||
fld [_t4]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp qword [ebx+eax*8]
|
||||
; f[l7] = t1 - t4;
|
||||
mov eax, [.l7]
|
||||
fsubp st1, st0
|
||||
fstp qword [ebx+eax*8]
|
||||
|
||||
; f[l6] = t2 + t3;
|
||||
mov eax, [.l6]
|
||||
fld [_t2]
|
||||
fld [_t3]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp qword [ebx+eax*8]
|
||||
; f[l8] = t2 - t3;
|
||||
mov eax, [.l8]
|
||||
fsubp st1, st0
|
||||
fstp qword [ebx+eax*8]
|
||||
|
||||
; t1 = f[l1] + t6;
|
||||
mov eax, [.l1]
|
||||
fld qword [ebx+eax*8]
|
||||
fld [_t6]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp [_t1]
|
||||
; t2 = f[l1] - t6;
|
||||
fsubp st1, st0
|
||||
fstp [_t2]
|
||||
|
||||
; t3 = t8 - t0;
|
||||
fld [_t8]
|
||||
fsub [_t0]
|
||||
fstp [_t3]
|
||||
; t4 = t5 + t7;
|
||||
fld [_t5]
|
||||
fadd [_t7]
|
||||
fstp [_t4]
|
||||
|
||||
; f[l1] = t1 + t4;
|
||||
mov eax, [.l1]
|
||||
fld [_t1]
|
||||
fld [_t4]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp qword [ebx+eax*8]
|
||||
; f[l3] = t1 - t4;
|
||||
mov eax, [.l3]
|
||||
fsubp st1, st0
|
||||
fstp qword [ebx+eax*8]
|
||||
|
||||
; f[l2] = t2 + t3;
|
||||
mov eax, [.l2]
|
||||
fld [_t2]
|
||||
fld [_t3]
|
||||
fld st0
|
||||
fadd st0, st2
|
||||
fstp qword [ebx+eax*8]
|
||||
; f[l4] = t2 - t3;
|
||||
mov eax, [.l4]
|
||||
fsubp st1, st0
|
||||
fstp qword [ebx+eax*8]
|
||||
|
||||
; 374 : }
|
||||
jmp .next_k
|
||||
|
||||
.done_k:
|
||||
; 375 : }
|
||||
add ebx, [.d6] ; d6 = d5*8
|
||||
cmp ebx, [.end_of_array]
|
||||
jb .next_j
|
||||
|
||||
; 376 : }
|
||||
mov cx, [.step]
|
||||
jmp .newstep
|
||||
.done:
|
||||
|
||||
; 377 : }
|
||||
ret
|
||||
|
||||
align 4
|
||||
.l1 dd 0
|
||||
.l2 dd 0
|
||||
.l3 dd 0
|
||||
.l4 dd 0
|
||||
.l5 dd 0
|
||||
.l6 dd 0
|
||||
.l7 dd 0
|
||||
.l8 dd 0
|
||||
.l9 dd 0
|
||||
.l0 dd 0
|
||||
.d1 dd 0
|
||||
.d2 dd 0
|
||||
.d3 dd 0
|
||||
.d4 dd 0
|
||||
.d5 dd 0
|
||||
.d6 dd 0
|
||||
.j5 dd 0
|
||||
.jj dd 0
|
||||
.end_of_array dd 0
|
||||
.step dw 0
|
||||
|
||||
align 8
|
||||
|
||||
;=========== Step3 ends here ===========
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
; =================================================================
|
||||
; syscall entry
|
||||
;
|
||||
_f dd ?
|
||||
_N dd 1024 ; number of points
|
||||
|
||||
_a dd ? ; initial data array
|
||||
x dd 0 ; tranformed (float) data array
|
||||
_Cosins dd 0
|
||||
_Sines dd 0
|
||||
|
||||
FFT4:
|
||||
or al, al
|
||||
jnz .trans
|
||||
mov cl, Power_of_4
|
||||
mov eax, 1
|
||||
shl eax, cl
|
||||
shl eax, cl
|
||||
mov [_N], eax
|
||||
shl eax, 2 ; size of Sine table in bytes
|
||||
add eax, ebx
|
||||
mov [_Sines], ebx
|
||||
mov [_Cosins], eax
|
||||
cpuid
|
||||
rdtsc
|
||||
mov [.time], eax
|
||||
call MakeSinCosTable
|
||||
cpuid
|
||||
rdtsc
|
||||
sub eax, [.time]
|
||||
ret
|
||||
.trans:
|
||||
mov [x], ebx
|
||||
mov [_f], ebx
|
||||
cli ;-----
|
||||
cpuid
|
||||
rdtsc
|
||||
mov [.time], eax
|
||||
call BitInvert
|
||||
call step1
|
||||
call step2
|
||||
call step3
|
||||
cpuid
|
||||
rdtsc
|
||||
sti ;----
|
||||
sub eax, [.time]
|
||||
ret
|
||||
|
||||
.time dd 0
|
||||
Loading…
Reference in New Issue
Block a user