forked from acco/chti23
233 lines
No EOL
5.7 KiB
ArmAsm
233 lines
No EOL
5.7 KiB
ArmAsm
PRESERVE8
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THUMB
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export DFTReel
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export DFTImage
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export DFTTotale
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import LeSignal
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; ====================== zone de réservation de données, ======================================
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;Section RAM (read only) :
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area mesdata,data,readonly
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;Section RAM (read write):
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area maram,data,readwrite
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; ===============================================================================================
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;Section ROM code (read only) :
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area moncode,code,readonly
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; écrire le code ici
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DFTReel proc
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push {lr}
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mov r2, #0
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mov r3, #0
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;;Pour i allant de 0 à M-1 (ici, M = 64)
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SommeForReel
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;; Rsom += Signal[i] * TabCos[k*i]
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ldrsh r4, [r0,r3,lsl #1]
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mul r5, r1, r3
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and r5, #63
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ldr r6, =TabCos
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ldrsh r5, [r6,r5,lsl #1]
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mla r2, r4, r5, r2
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add r3, #1
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cmp r3, #64
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bne SommeForReel
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;;Fin Pour
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mov r0, r2
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pop {pc}
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endp
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;;// Renvoie Rsom, Isom (format 5.27) ou Rsom^2 + Isom^2 (format 10.54)
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;; DFT Partie imaginaire
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DFTImage proc
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push {lr}
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mov r2, #0
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mov r3, #0
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;;Pour i allant de 0 à M-1 (ici, M = 64)
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SommeForImage
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;; Rsom += Signal[i] * TabCos[k*i]
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ldrsh r4, [r0,r3,lsl #1]
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mul r5, r1, r3
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and r5, #63
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ldr r6, =TabSin
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ldrsh r5, [r6,r5,lsl #1]
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mla r2, r4, r5, r2
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add r3, #1
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cmp r3, #64
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bne SommeForImage
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;;Fin Pour
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mov r0, r2
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pop {pc}
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endp
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DFTTotale proc
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push {lr}
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mov r7, r0 ;;On sauvegarde les arguments de la fonction dans r7 et r8
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mov r8, r1
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bl DFTReel
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mov r3, r7
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mov r7, r0 ;;On sauvegarde la valeur de retour de DFTReel
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mov r0, r3
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mov r3, r8
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mov r8, r1
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mov r1, r3
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bl DFTImage
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smull r1, r0, r0, r0
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smlal r1, r0, r7, r7
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pop {pc}
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endp
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;Section ROM code (read only) :
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AREA Trigo, DATA, READONLY
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; codage fractionnaire 1.15
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TabCos
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DCW 32767 ; 0 0x7fff 0.99997
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DCW 32610 ; 1 0x7f62 0.99518
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DCW 32138 ; 2 0x7d8a 0.98077
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DCW 31357 ; 3 0x7a7d 0.95694
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DCW 30274 ; 4 0x7642 0.92389
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DCW 28899 ; 5 0x70e3 0.88193
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DCW 27246 ; 6 0x6a6e 0.83148
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DCW 25330 ; 7 0x62f2 0.77301
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DCW 23170 ; 8 0x5a82 0.70709
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DCW 20788 ; 9 0x5134 0.63440
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DCW 18205 ; 10 0x471d 0.55557
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DCW 15447 ; 11 0x3c57 0.47141
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DCW 12540 ; 12 0x30fc 0.38269
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DCW 9512 ; 13 0x2528 0.29028
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DCW 6393 ; 14 0x18f9 0.19510
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DCW 3212 ; 15 0x0c8c 0.09802
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DCW 0 ; 16 0x0000 0.00000
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DCW -3212 ; 17 0xf374 -0.09802
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DCW -6393 ; 18 0xe707 -0.19510
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DCW -9512 ; 19 0xdad8 -0.29028
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DCW -12540 ; 20 0xcf04 -0.38269
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DCW -15447 ; 21 0xc3a9 -0.47141
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DCW -18205 ; 22 0xb8e3 -0.55557
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DCW -20788 ; 23 0xaecc -0.63440
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DCW -23170 ; 24 0xa57e -0.70709
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DCW -25330 ; 25 0x9d0e -0.77301
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DCW -27246 ; 26 0x9592 -0.83148
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DCW -28899 ; 27 0x8f1d -0.88193
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DCW -30274 ; 28 0x89be -0.92389
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DCW -31357 ; 29 0x8583 -0.95694
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DCW -32138 ; 30 0x8276 -0.98077
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DCW -32610 ; 31 0x809e -0.99518
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DCW -32768 ; 32 0x8000 -1.00000
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DCW -32610 ; 33 0x809e -0.99518
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DCW -32138 ; 34 0x8276 -0.98077
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DCW -31357 ; 35 0x8583 -0.95694
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DCW -30274 ; 36 0x89be -0.92389
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DCW -28899 ; 37 0x8f1d -0.88193
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DCW -27246 ; 38 0x9592 -0.83148
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DCW -25330 ; 39 0x9d0e -0.77301
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DCW -23170 ; 40 0xa57e -0.70709
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DCW -20788 ; 41 0xaecc -0.63440
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DCW -18205 ; 42 0xb8e3 -0.55557
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DCW -15447 ; 43 0xc3a9 -0.47141
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DCW -12540 ; 44 0xcf04 -0.38269
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DCW -9512 ; 45 0xdad8 -0.29028
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DCW -6393 ; 46 0xe707 -0.19510
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DCW -3212 ; 47 0xf374 -0.09802
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DCW 0 ; 48 0x0000 0.00000
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DCW 3212 ; 49 0x0c8c 0.09802
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DCW 6393 ; 50 0x18f9 0.19510
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DCW 9512 ; 51 0x2528 0.29028
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DCW 12540 ; 52 0x30fc 0.38269
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DCW 15447 ; 53 0x3c57 0.47141
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DCW 18205 ; 54 0x471d 0.55557
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DCW 20788 ; 55 0x5134 0.63440
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DCW 23170 ; 56 0x5a82 0.70709
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DCW 25330 ; 57 0x62f2 0.77301
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DCW 27246 ; 58 0x6a6e 0.83148
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DCW 28899 ; 59 0x70e3 0.88193
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DCW 30274 ; 60 0x7642 0.92389
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DCW 31357 ; 61 0x7a7d 0.95694
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DCW 32138 ; 62 0x7d8a 0.98077
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DCW 32610 ; 63 0x7f62 0.99518
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TabSin
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DCW 0 ; 0 0x0000 0.00000
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DCW 3212 ; 1 0x0c8c 0.09802
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DCW 6393 ; 2 0x18f9 0.19510
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DCW 9512 ; 3 0x2528 0.29028
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DCW 12540 ; 4 0x30fc 0.38269
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DCW 15447 ; 5 0x3c57 0.47141
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DCW 18205 ; 6 0x471d 0.55557
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DCW 20788 ; 7 0x5134 0.63440
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DCW 23170 ; 8 0x5a82 0.70709
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DCW 25330 ; 9 0x62f2 0.77301
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DCW 27246 ; 10 0x6a6e 0.83148
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DCW 28899 ; 11 0x70e3 0.88193
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DCW 30274 ; 12 0x7642 0.92389
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DCW 31357 ; 13 0x7a7d 0.95694
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DCW 32138 ; 14 0x7d8a 0.98077
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DCW 32610 ; 15 0x7f62 0.99518
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DCW 32767 ; 16 0x7fff 0.99997
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DCW 32610 ; 17 0x7f62 0.99518
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DCW 32138 ; 18 0x7d8a 0.98077
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DCW 31357 ; 19 0x7a7d 0.95694
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DCW 30274 ; 20 0x7642 0.92389
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DCW 28899 ; 21 0x70e3 0.88193
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DCW 27246 ; 22 0x6a6e 0.83148
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DCW 25330 ; 23 0x62f2 0.77301
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DCW 23170 ; 24 0x5a82 0.70709
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DCW 20788 ; 25 0x5134 0.63440
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DCW 18205 ; 26 0x471d 0.55557
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DCW 15447 ; 27 0x3c57 0.47141
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DCW 12540 ; 28 0x30fc 0.38269
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DCW 9512 ; 29 0x2528 0.29028
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DCW 6393 ; 30 0x18f9 0.19510
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DCW 3212 ; 31 0x0c8c 0.09802
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DCW 0 ; 32 0x0000 0.00000
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DCW -3212 ; 33 0xf374 -0.09802
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DCW -6393 ; 34 0xe707 -0.19510
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DCW -9512 ; 35 0xdad8 -0.29028
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DCW -12540 ; 36 0xcf04 -0.38269
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DCW -15447 ; 37 0xc3a9 -0.47141
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DCW -18205 ; 38 0xb8e3 -0.55557
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DCW -20788 ; 39 0xaecc -0.63440
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DCW -23170 ; 40 0xa57e -0.70709
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DCW -25330 ; 41 0x9d0e -0.77301
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DCW -27246 ; 42 0x9592 -0.83148
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DCW -28899 ; 43 0x8f1d -0.88193
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DCW -30274 ; 44 0x89be -0.92389
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DCW -31357 ; 45 0x8583 -0.95694
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DCW -32138 ; 46 0x8276 -0.98077
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DCW -32610 ; 47 0x809e -0.99518
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DCW -32768 ; 48 0x8000 -1.00000
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DCW -32610 ; 49 0x809e -0.99518
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DCW -32138 ; 50 0x8276 -0.98077
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DCW -31357 ; 51 0x8583 -0.95694
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DCW -30274 ; 52 0x89be -0.92389
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DCW -28899 ; 53 0x8f1d -0.88193
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DCW -27246 ; 54 0x9592 -0.83148
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DCW -25330 ; 55 0x9d0e -0.77301
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DCW -23170 ; 56 0xa57e -0.70709
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DCW -20788 ; 57 0xaecc -0.63440
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DCW -18205 ; 58 0xb8e3 -0.55557
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DCW -15447 ; 59 0xc3a9 -0.47141
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DCW -12540 ; 60 0xcf04 -0.38269
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DCW -9512 ; 61 0xdad8 -0.29028
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DCW -6393 ; 62 0xe707 -0.19510
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DCW -3212 ; 63 0xf374 -0.09802
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END
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