57 lines
1.9 KiB
Plaintext
Executable File
57 lines
1.9 KiB
Plaintext
Executable File
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; 8-bit interpolated mixing routine, 4 samples at a time. Rearranged
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; MM7 contains volume as packed floating point
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; MM6 contains offset as packed integer offset
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; MM5 = DeltaOffset
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; MM7 = RVol|LVol
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; MM6 = (1-Offset2)|Offset2|(1-Offset1)|Offset1
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MovD MM0, [SampleBlock1] ; MM0 = x|x|x|x|S2H|S2L|S1H|S1L
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MovQ MM2, MM6
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PSRAW MM2, 1
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PUnpckLBW MM0, MM0 ; MM0 = S2H|S2L|S1H|S1L
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PAddW MM6, MM5
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PMAddWD MM0, MM2 ; MM0 = IS2|IS1
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MovD MM1, [SampleBlock2] ; MM1 = x|x|x|x|S4H|S4L|S3H|S3L
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MovQ MM2, MM6
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PUnpckLBW MM1, MM1 ; MM1 = S4H|S4L|S3H|S3L
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PSRAW MM2, 1
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PI2FD MM0, MM0 ; MM0 = FIS2|FIS1
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PMAddWD MM1, MM2 ; MM1 = IS4|IS3
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MovQ MM2, MM0
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PUnpckLDQ MM0, MM0 ; MM0 = FIS1|FIS1
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PUnpckHDQ MM2, MM2 ; MM2 = FIS2|FIS2
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PI2FD MM1, MM1 ; MM1 = FIS4|FIS3
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PFMul MM0, MM7 ; MM0 = R1|L1
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PAddW MM6, MM5
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PFMul MM2, MM7 ; MM2 = R2|L2
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MovQ MM3, MM1
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PFAdd MM0, [Buffer1]
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PUnpckLDQ MM1, MM1 ; MM1 = FIS3|FIS3
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PFAdd MM2, [Buffer2]
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PUnpckHDQ MM3, MM3 ; MM3 = FIS4|FIS4
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PFMul MM1, MM7
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MovQ [Buffer1], MM0
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PFMul MM3, MM7
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PFAdd MM1, [Buffer3]
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MovQ [Buffer2], MM2
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PFAdd MM3, [Buffer4]
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MovQ [Buffer3], MM1
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MovQ [Buffer4], MM3
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