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;======================================================================== |
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;= = |
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;= Fast Hartley Transform demo for KolibriOS = |
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;= = |
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;= Copyright (C) 2010, Artem Jerdev = |
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;= = |
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;= refer to wiki.kolibtios.org for all details = |
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;= = |
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;======================================================================== |
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use32 |
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org 0x0 |
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db 'MENUET01' ; 8 byte id |
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dd 0x01 ; header version |
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dd START ; start of code |
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dd I_END ; size of image |
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dd 0x100000 ; memory for app |
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dd 0xbfffc ; esp |
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dd 0x0 , 0x0 ; I_Param , I_Icon |
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include '../../macros.inc' |
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dunkaist |
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include '../../debug.inc' |
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art_zh |
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include 'fht4code.asm' |
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art_zh |
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START: ; start of execution |
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call main |
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mov eax,-1 ; close this program |
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int 0x40 |
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;============================================================= |
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;Func: calculates a simple function |
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; ff = (512*2^(-t) * cos (2.5*t)) |
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; uses: eax, ebx |
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;------------ |
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Func: |
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; 9 : { |
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; 10 : double x,t; |
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; 11 : int f; |
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; 12 : |
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; 13 : x = (i < N2) ? i : i - NUM_POINTS; |
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mov eax, [ii] |
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cmp eax, 512 |
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jge .index_negative |
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jmp .index_correct |
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.index_negative: |
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sub eax, 1024 |
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.index_correct: |
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mov [temp], eax |
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; fild [temp] |
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; 14 : t = x / 16.0; |
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; f2xm1 argument (abs) must be less than 1, so |
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mov [t_mod], eax |
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and [t_mod], 0x0F ; x % 16 |
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shr eax, 4 ; x / 16 |
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mov [t_div], eax |
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fild [temp] |
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; 15 : if (t<0) t = -t; |
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fabs |
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exp_ok: |
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; 16 : f = (512*2^(-t) * cos (2.5*t)); |
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fchs |
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f2xm1 |
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fmul [f500] |
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fstp [tv93] |
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fld [f2_5] |
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fmul [tt] |
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fcos |
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fmul [tv93] |
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fstp [tt] |
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mov bx, word[tt+6] |
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shr bx,4 |
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and bx,0x07FF |
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add ax,bx |
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shl ax,4 |
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and word[tt+6], 0x800F |
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or word[tt+6], ax |
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fld [tt] |
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fstp [ff] |
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; 17 : return f; |
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; 18 : } |
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ret |
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;--------------------------------------------------------- |
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; test data filler |
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; |
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; uses eax, ebx, ecx |
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FillData: |
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; 29 : for (i=0; i |
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; here : ecx = i |
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xor ecx, ecx |
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.funcloop: |
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; 30 : { |
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; 31 : ia[i] = Func(i); |
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mov [ii], ecx |
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call Func |
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fld [ff] |
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fstp qword [edx+ecx*8] |
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; 32 : } |
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inc ecx |
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cmp ecx, [_in] ; ecx == N ? |
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jne .funcloop |
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ret |
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;==================================================================== |
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; main |
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;==================================================================== |
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_ia dd 0 |
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_ii dd 0 |
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_ip dd 0 |
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_in dd 0 |
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_it dd 0 |
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;----------------- |
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main: |
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mov eax, 68 |
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mov ebx, 11 |
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int 0x40 |
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fninit |
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mov cl, 2 ; power of 4 |
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mov byte[_ip], cl |
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mov eax, 1 |
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shl eax, cl |
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shl eax, cl |
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mov [_in], eax |
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mov dl, cl |
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call CreateSinCosTable |
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mov [_it], edx |
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mov ecx, [_in] |
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shl ecx, 3 |
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mov ebx, 12 |
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mov eax, 68 |
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int 0x40 |
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mov [_ia], eax |
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mov edx, eax |
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call FillData |
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cpuid |
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rdtsc |
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mov [t_0], eax |
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push [_it] |
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push [_ia] |
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push [_ip] |
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push [_in] |
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call FHT_4 |
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add esp, 16 |
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cpuid |
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rdtsc |
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mov [t_1], eax |
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sub eax, [t_0] |
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debug_print_hex eax |
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print '<- fht time' |
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mov edx, [_it] |
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call DestroySinCosTable |
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mov ecx, [_ia] |
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mov ebx, 13 |
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mov eax, 68 |
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int 0x40 |
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ret |
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; ======================================================== |
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; static data |
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;---------------- |
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align 8 |
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;f18 dq 0x4032000000000000 |
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f256 dq 256.01f |
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f14_2 dq 14.2f |
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f500 dq 0x407f400000000000 |
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f2_5 dq 0x4004000000000000 |
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tt dq ? |
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tv93 dq ? |
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t_div dd ? |
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t_mod dd ? |
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temp dd ? |
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ff dq ? ; return value (int) |
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ii dd ? ; argument (int) = array index |
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t_1 dd ? |
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t_0 dd ? |
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fcontrol dw 0x0037f |
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title db ' Fast Hartley Transform Test - A.Jerdev 2010' |
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I_END: |