sintbl.asm

包含几个高效的矢量运算的数学函数

M .set 9 ; Sine table size log2

; You may substitute your own sine table here to trade off accuracy for storage.  
; Just compute one full cycle of
; a sine wave from 0 to 2*pi and add an extra sample at the end, and convert
; to Q.15 format.
  
; In Matlab:
; 
; tv=linspace(0,2*pi,N+1);
; table=sin(tv);
; inttable=floor(32767.999999999*table);

	.def _SineTable
_SineTable:
 .if (M==9) ; error = +- 1 LS bit
 .word            0
 .word          402
 .word          804
 .word         1206
 .word         1607
 .word         2009
 .word         2410
 .word         2811
 .word         3211
 .word         3611
 .word         4011
 .word         4409
 .word         4808
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 .word         6392
 .word         6786
 .word         7179
 .word         7571
 .word         7961
 .word         8351
 .word         8739
 .word         9126
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 .word         9896
 .word        10278
 .word        10659
 .word        11039
 .word        11416
 .word        11793
 .word        12167
 .word        12539
 .word        12910
 .word        13278
 .word        13645
 .word        14010
 .word        14372
 .word        14732
 .word        15090
 .word        15446
 .word        15800
 .word        16151
 .word        16499
 .word        16846
 .word        17189
 .word        17530
 .word        17869
 .word        18204
 .word        18537
 .word        18868
 .word        19195
 .word        19519
 .word        19841
 .word        20159
 .word        20475
 .word        20787
 .word        21097
 .word        21403
 .word        21706
 .word        22005
 .word        22301
 .word        22594
 .word        22884
 .word        23170
 .word        23453
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 .word        25073
 .word        25330
 .word        25583
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 .word        27466
 .word        27684
 .word        27897
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 .word        28511
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 .word        29621
 .word        29791
 .word        29956
 .word        30117
 .word        30273
 .word        30425
 .word        30572
 .word        30714
 .word        30852
 .word        30985
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 .word        31237
 .word        31357
 .word        31471
 .word        31581
 .word        31685
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 .word        31971
 .word        32057
 .word        32138
 .word        32214
 .word        32285
 .word        32351
 .word        32413
 .word        32469
 .word        32521
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 .word        32610
 .word        32647
 .word        32679
 .word        32706
 .word        32728
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 .word        32758
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 .word        32706
 .word        32679
 .word        32647
 .word        32610
 .word        32568
 .word        32521
 .word        32469
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 .word        32351
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 .word        32214
 .word        32138
 .word        32057
 .word        31971
 .word        31881
 .word        31785
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 .word        31581
 .word        31471
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 .word        31237
 .word        31114
 .word        30985
 .word        30852
 .word        30714
 .word        30572
 .word        30425
 .word        30273
 .word        30117
 .word        29956
 .word        29791
 .word        29621
 .word        29447
 .word        29269
 .word        29086
 .word        28898
 .word        28707
 .word        28511
 .word        28310
 .word        28106
 .word        27897
 .word        27684
 .word        27466
 .word        27245
 .word        27020
 .word        26790
 .word        26557
 .word        26319
 .word        26077
 .word        25832
 .word        25583
 .word        25330
 .word        25073
 .word        24812
 .word        24547
 .word        24279
 .word        24007
 .word        23732
 .word        23453
 .word        23170
 .word        22884
 .word        22594
 .word        22301
 .word        22005
 .word        21706
 .word        21403
 .word        21097
 .word        20787
 .word        20475
 .word        20159
 .word        19841
 .word        19519
 .word        19195
 .word        18868
 .word        18537
 .word        18204
 .word        17869
 .word        17530
 .word        17189
 .word        16846
 .word        16499
 .word        16151
 .word        15800
 .word        15446
 .word        15090
 .word        14732
 .word        14372
 .word        14010
 .word        13645
 .word        13278
 .word        12910
 .word        12539
 .word        12167
 .word        11793
 .word        11416
 .word        11039
 .word        10659
 .word        10278
 .word         9896
 .word         9512
 .word         9126
 .word         8739
 .word         8351
 .word         7961
 .word         7571
 .word         7179
 .word         6786
 .word         6392
 .word         5997
 .word         5602
 .word         5205
 .word         4808
 .word         4409
 .word         4011
 .word         3611
 .word         3211
 .word         2811
 .word         2410
 .word         2009
 .word         1607
 .word         1206
 .word          804
 .word          402
 .word            0
 .word         -403
 .word         -805
 .word        -1207
 .word        -1608
 .word        -2010
 .word        -2411
 .word        -2812
 .word        -3212
 .word        -3612
 .word        -4012
 .word        -4410
 .word        -4809
 .word        -5206
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 .word        -5998
 .word        -6393
 .word        -6787
 .word        -7180
 .word        -7572
 .word        -7962
 .word        -8352
 .word        -8740
 .word        -9127
 .word        -9513
 .word        -9897
 .word       -10279
 .word       -10660
 .word       -11040
 .word       -11417
 .word       -11794
 .word       -12168
 .word       -12540
 .word       -12911
 .word       -13279
 .word       -13646
 .word       -14011
 .word       -14373
 .word       -14733
 .word       -15091
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 .word       -27685
 .word       -27898
 .word       -28107
 .word       -28311
 .word       -28512
 .word       -28708
 .word       -28899
 .word       -29087
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 .word       -29622
 .word       -29792
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 .word       -30274
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 .word       -30573
 .word       -30715
 .word       -30853
 .word       -30986
 .word       -31115
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 .word       -32569
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 .word       -32707
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 .word       -32746
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 .word       -32768
 .word       -32766
 .word       -32759
 .word       -32746
 .word       -32729
 .word       -32707
 .word       -32680
 .word       -32648
 .word       -32611
 .word       -32569
 .word       -32522
 .word       -32470
 .word       -32414
 .word       -32352
 .word       -32286
 .word       -32215
 .word       -32139
 .word       -32058
 .word       -31972
 .word       -31882
 .word       -31786
 .word       -31686
 .word       -31582
 .word       -31472
 .word       -31358
 .word       -31238
 .word       -31115
 .word       -30986
 .word       -30853
 .word       -30715
 .word       -30573
 .word       -30426
 .word       -30274
 .word       -30118
 .word       -29957
 .word       -29792
 .word       -29622
 .word       -29448
 .word       -29270
 .word       -29087
 .word       -28899
 .word       -28708
 .word       -28512
 .word       -28311
 .word       -28107
 .word       -27898
 .word       -27685
 .word       -27467
 .word       -27246
 .word       -27021
 .word       -26791
 .word       -26558
 .word       -26320
 .word       -26078
 .word       -25833
 .word       -25584
 .word       -25331
 .word       -25074
 .word       -24813
 .word       -24548
 .word       -24280
 .word       -24008
 .word       -23733
 .word       -23454
 .word       -23171
 .word       -22885
 .word       -22595
 .word       -22302
 .word       -22006
 .word       -21707
 .word       -21404
 .word       -21098
 .word       -20788
 .word       -20476
 .word       -20160
 .word       -19842
 .word       -19520
 .word       -19196
 .word       -18869
 .word       -18538
 .word       -18205
 .word       -17870
 .word       -17531
 .word       -17190
 .word       -16847
 .word       -16500
 .word       -16152
 .word       -15801
 .word       -15447
 .word       -15091
 .word       -14733
 .word       -14373
 .word       -14011
 .word       -13646
 .word       -13279
 .word       -12911
 .word       -12540
 .word       -12168
 .word       -11794
 .word       -11417
 .word       -11040
 .word       -10660
 .word       -10279
 .word        -9897
 .word        -9513
 .word        -9127
 .word        -8740
 .word        -8352
 .word        -7962
 .word        -7572
 .word        -7180
 .word        -6787
 .word        -6393
 .word        -5998
 .word        -5603
 .word        -5206
 .word        -4809
 .word        -4410
 .word        -4012
 .word        -3612
 .word        -3212
 .word        -2812
 .word        -2411
 .word        -2010
 .word        -1608
 .word        -1207
 .word         -805
 .word         -403
 .word           -1
 .endif