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Nuked OPN2: optimize detune calculation
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@ -506,7 +506,7 @@ void OPN2_PhaseCalcIncrement(ym3438_t *chip)
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basefreq = (fnum << chip->pg_block) >> 2;
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basefreq = (fnum << chip->pg_block) >> 2;
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/* Apply detune */
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/* Apply detune */
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if (dt & 0x03)
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if (dt_l)
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{
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{
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if (kcode > 0x1c)
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if (kcode > 0x1c)
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{
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{
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@ -514,7 +514,7 @@ void OPN2_PhaseCalcIncrement(ym3438_t *chip)
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}
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}
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block = kcode >> 2;
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block = kcode >> 2;
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note = kcode & 0x03;
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note = kcode & 0x03;
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sum = block + 1 + ((dt_l == 3) | (dt_l & 0x02) | ((dt_l != 0) << 3));
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sum = block + 9 + ((dt_l == 3) | (dt_l & 0x02));
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sum_h = sum >> 1;
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sum_h = sum >> 1;
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sum_l = sum & 0x01;
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sum_l = sum & 0x01;
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detune = pg_detune[(sum_l << 2) | note] >> (9 - sum_h);
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detune = pg_detune[(sum_l << 2) | note] >> (9 - sum_h);
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