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aymo_ymf262_armv7_neon.c
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/*
AYMO - Accelerated YaMaha Operator
Copyright (c) 2023 Andrea Zoppi.
This file is part of AYMO.
AYMO is free software: you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 2.1 of the License, or (at your option)
any later version.
AYMO is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with AYMO. If not, see <https://www.gnu.org/licenses/>.
This work is heavily based on the Nuked OPL3 library, distributed under
the same licensing model.
Thanks:
Nuke.YKT:
Nuked OPL3 emulator. The following thanks inherit from it.
MAME Development Team (Jarek Burczynski, Tatsuyuki Satoh):
Feedback and Rhythm part calculation information.
forums.submarine.org.uk (carbon14, opl3):
Tremolo and phase generator calculation information.
OPLx decapsulated (Matthew Gambrell, Olli Niemitalo):
OPL2 ROMs.
siliconpr0n.org (John McMaster, digshadow):
YMF262 and VRC VII decaps and die shots.
*/
#include "aymo_ymf262_armv7_neon.h"
#include "aymo_arch_armv7_neon_macros.h"
#ifdef AYMO_ARCH_IS_ARMV7_NEON
// Exponential look-up table
// Values are pre-multiplied by 2
AYMO_STATIC AYMO_ALIGN_V16
const int16_t aymo_(exp_x2_table)[256 + 4] =
{
0x0FF4, 0x0FEA, 0x0FDE, 0x0FD4, 0x0FC8, 0x0FBE, 0x0FB4, 0x0FA8,
0x0F9E, 0x0F92, 0x0F88, 0x0F7E, 0x0F72, 0x0F68, 0x0F5C, 0x0F52,
0x0F48, 0x0F3E, 0x0F32, 0x0F28, 0x0F1E, 0x0F14, 0x0F08, 0x0EFE,
0x0EF4, 0x0EEA, 0x0EE0, 0x0ED4, 0x0ECA, 0x0EC0, 0x0EB6, 0x0EAC,
0x0EA2, 0x0E98, 0x0E8E, 0x0E84, 0x0E7A, 0x0E70, 0x0E66, 0x0E5C,
0x0E52, 0x0E48, 0x0E3E, 0x0E34, 0x0E2A, 0x0E20, 0x0E16, 0x0E0C,
0x0E04, 0x0DFA, 0x0DF0, 0x0DE6, 0x0DDC, 0x0DD2, 0x0DCA, 0x0DC0,
0x0DB6, 0x0DAC, 0x0DA4, 0x0D9A, 0x0D90, 0x0D88, 0x0D7E, 0x0D74,
0x0D6A, 0x0D62, 0x0D58, 0x0D50, 0x0D46, 0x0D3C, 0x0D34, 0x0D2A,
0x0D22, 0x0D18, 0x0D10, 0x0D06, 0x0CFE, 0x0CF4, 0x0CEC, 0x0CE2,
0x0CDA, 0x0CD0, 0x0CC8, 0x0CBE, 0x0CB6, 0x0CAE, 0x0CA4, 0x0C9C,
0x0C92, 0x0C8A, 0x0C82, 0x0C78, 0x0C70, 0x0C68, 0x0C60, 0x0C56,
0x0C4E, 0x0C46, 0x0C3C, 0x0C34, 0x0C2C, 0x0C24, 0x0C1C, 0x0C12,
0x0C0A, 0x0C02, 0x0BFA, 0x0BF2, 0x0BEA, 0x0BE0, 0x0BD8, 0x0BD0,
0x0BC8, 0x0BC0, 0x0BB8, 0x0BB0, 0x0BA8, 0x0BA0, 0x0B98, 0x0B90,
0x0B88, 0x0B80, 0x0B78, 0x0B70, 0x0B68, 0x0B60, 0x0B58, 0x0B50,
0x0B48, 0x0B40, 0x0B38, 0x0B32, 0x0B2A, 0x0B22, 0x0B1A, 0x0B12,
0x0B0A, 0x0B02, 0x0AFC, 0x0AF4, 0x0AEC, 0x0AE4, 0x0ADE, 0x0AD6,
0x0ACE, 0x0AC6, 0x0AC0, 0x0AB8, 0x0AB0, 0x0AA8, 0x0AA2, 0x0A9A,
0x0A92, 0x0A8C, 0x0A84, 0x0A7C, 0x0A76, 0x0A6E, 0x0A68, 0x0A60,
0x0A58, 0x0A52, 0x0A4A, 0x0A44, 0x0A3C, 0x0A36, 0x0A2E, 0x0A28,
0x0A20, 0x0A18, 0x0A12, 0x0A0C, 0x0A04, 0x09FE, 0x09F6, 0x09F0,
0x09E8, 0x09E2, 0x09DA, 0x09D4, 0x09CE, 0x09C6, 0x09C0, 0x09B8,
0x09B2, 0x09AC, 0x09A4, 0x099E, 0x0998, 0x0990, 0x098A, 0x0984,
0x097C, 0x0976, 0x0970, 0x096A, 0x0962, 0x095C, 0x0956, 0x0950,
0x0948, 0x0942, 0x093C, 0x0936, 0x0930, 0x0928, 0x0922, 0x091C,
0x0916, 0x0910, 0x090A, 0x0904, 0x08FC, 0x08F6, 0x08F0, 0x08EA,
0x08E4, 0x08DE, 0x08D8, 0x08D2, 0x08CC, 0x08C6, 0x08C0, 0x08BA,
0x08B4, 0x08AE, 0x08A8, 0x08A2, 0x089C, 0x0896, 0x0890, 0x088A,
0x0884, 0x087E, 0x0878, 0x0872, 0x086C, 0x0866, 0x0860, 0x085A,
0x0854, 0x0850, 0x084A, 0x0844, 0x083E, 0x0838, 0x0832, 0x082C,
0x0828, 0x0822, 0x081C, 0x0816, 0x0810, 0x080C, 0x0806, 0x0800,
0x0800, 0x0800, 0x0800, 0x0800
};
// Logsin look-up table
AYMO_STATIC AYMO_ALIGN_V16
const int16_t aymo_(logsin_table)[256 + 4] =
{
0x0859, 0x06C3, 0x0607, 0x058B, 0x052E, 0x04E4, 0x04A6, 0x0471,
0x0443, 0x041A, 0x03F5, 0x03D3, 0x03B5, 0x0398, 0x037E, 0x0365,
0x034E, 0x0339, 0x0324, 0x0311, 0x02FF, 0x02ED, 0x02DC, 0x02CD,
0x02BD, 0x02AF, 0x02A0, 0x0293, 0x0286, 0x0279, 0x026D, 0x0261,
0x0256, 0x024B, 0x0240, 0x0236, 0x022C, 0x0222, 0x0218, 0x020F,
0x0206, 0x01FD, 0x01F5, 0x01EC, 0x01E4, 0x01DC, 0x01D4, 0x01CD,
0x01C5, 0x01BE, 0x01B7, 0x01B0, 0x01A9, 0x01A2, 0x019B, 0x0195,
0x018F, 0x0188, 0x0182, 0x017C, 0x0177, 0x0171, 0x016B, 0x0166,
0x0160, 0x015B, 0x0155, 0x0150, 0x014B, 0x0146, 0x0141, 0x013C,
0x0137, 0x0133, 0x012E, 0x0129, 0x0125, 0x0121, 0x011C, 0x0118,
0x0114, 0x010F, 0x010B, 0x0107, 0x0103, 0x00FF, 0x00FB, 0x00F8,
0x00F4, 0x00F0, 0x00EC, 0x00E9, 0x00E5, 0x00E2, 0x00DE, 0x00DB,
0x00D7, 0x00D4, 0x00D1, 0x00CD, 0x00CA, 0x00C7, 0x00C4, 0x00C1,
0x00BE, 0x00BB, 0x00B8, 0x00B5, 0x00B2, 0x00AF, 0x00AC, 0x00A9,
0x00A7, 0x00A4, 0x00A1, 0x009F, 0x009C, 0x0099, 0x0097, 0x0094,
0x0092, 0x008F, 0x008D, 0x008A, 0x0088, 0x0086, 0x0083, 0x0081,
0x007F, 0x007D, 0x007A, 0x0078, 0x0076, 0x0074, 0x0072, 0x0070,
0x006E, 0x006C, 0x006A, 0x0068, 0x0066, 0x0064, 0x0062, 0x0060,
0x005E, 0x005C, 0x005B, 0x0059, 0x0057, 0x0055, 0x0053, 0x0052,
0x0050, 0x004E, 0x004D, 0x004B, 0x004A, 0x0048, 0x0046, 0x0045,
0x0043, 0x0042, 0x0040, 0x003F, 0x003E, 0x003C, 0x003B, 0x0039,
0x0038, 0x0037, 0x0035, 0x0034, 0x0033, 0x0031, 0x0030, 0x002F,
0x002E, 0x002D, 0x002B, 0x002A, 0x0029, 0x0028, 0x0027, 0x0026,
0x0025, 0x0024, 0x0023, 0x0022, 0x0021, 0x0020, 0x001F, 0x001E,
0x001D, 0x001C, 0x001B, 0x001A, 0x0019, 0x0018, 0x0017, 0x0017,
0x0016, 0x0015, 0x0014, 0x0014, 0x0013, 0x0012, 0x0011, 0x0011,
0x0010, 0x000F, 0x000F, 0x000E, 0x000D, 0x000D, 0x000C, 0x000C,
0x000B, 0x000A, 0x000A, 0x0009, 0x0009, 0x0008, 0x0008, 0x0007,
0x0007, 0x0007, 0x0006, 0x0006, 0x0005, 0x0005, 0x0005, 0x0004,
0x0004, 0x0004, 0x0003, 0x0003, 0x0003, 0x0002, 0x0002, 0x0002,
0x0002, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000
};
// Word index to Slot index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(word_to_slot)[AYMO_(SLOT_NUM_MAX)] =
{
0, 1, 2, 48, 18, 19, 20, 52,
12, 13, 14, 56, 30, 31, 32, 60,
3, 4, 5, 49, 21, 22, 23, 53,
15, 16, 17, 57, 33, 34, 35, 61,
6, 7, 8, 50, 24, 25, 26, 54,
42, 43, 44, 58, 36, 37, 38, 62,
9, 10, 11, 51, 27, 28, 29, 55,
45, 46, 47, 59, 39, 40, 41, 63
};
// Slot index to Word index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(slot_to_word)[AYMO_(SLOT_NUM_MAX)] =
{
0, 1, 2, 16, 17, 18, 32, 33,
34, 48, 49, 50, 8, 9, 10, 24,
25, 26, 4, 5, 6, 20, 21, 22,
36, 37, 38, 52, 53, 54, 12, 13,
14, 28, 29, 30, 44, 45, 46, 60,
61, 62, 40, 41, 42, 56, 57, 58,
3, 19, 35, 51, 7, 23, 39, 55,
11, 27, 43, 59, 15, 31, 47, 63
};
// Word index to Channel_2xOP index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(word_to_ch2x)[AYMO_(SLOT_NUM_MAX)] =
{
0, 1, 2, 24, 9, 10, 11, 26,
6, 7, 8, 28, 15, 16, 17, 30,
0, 1, 2, 24, 9, 10, 11, 26,
6, 7, 8, 28, 15, 16, 17, 30,
3, 4, 5, 25, 12, 13, 14, 27,
21, 22, 23, 29, 18, 19, 20, 31,
3, 4, 5, 25, 12, 13, 14, 27,
21, 22, 23, 29, 18, 19, 20, 31
};
// Channel_2xOP index to Word index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(ch2x_to_word)[AYMO_(SLOT_NUM_MAX) / 2][2/* slot */] =
{
{ 0, 16 }, { 1, 17 }, { 2, 18 }, { 32, 48 },
{ 33, 49 }, { 34, 50 }, { 8, 24 }, { 9, 25 },
{ 10, 26 }, { 4, 20 }, { 5, 21 }, { 6, 22 },
{ 36, 52 }, { 37, 53 }, { 38, 54 }, { 12, 28 },
{ 13, 29 }, { 14, 30 }, { 44, 60 }, { 45, 61 },
{ 46, 62 }, { 40, 56 }, { 41, 57 }, { 42, 58 },
{ 3, 19 }, { 35, 51 }, { 7, 23 }, { 39, 55 },
{ 11, 27 }, { 43, 59 }, { 15, 31 }, { 47, 63 }
};
// Word index to Channel_4xOP index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(word_to_ch4x)[AYMO_(SLOT_NUM_MAX)] =
{
0, 1, 2, 12, 3, 4, 5, 13,
6, 7, 8, 14, 9, 10, 11, 15,
0, 1, 2, 12, 3, 4, 5, 13,
6, 7, 8, 14, 9, 10, 11, 15,
0, 1, 2, 12, 3, 4, 5, 13,
6, 7, 8, 14, 9, 10, 11, 15,
0, 1, 2, 12, 3, 4, 5, 13,
6, 7, 8, 14, 9, 10, 11, 15
};
// Channel_4xOP index to Word index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(ch4x_to_word)[AYMO_(SLOT_NUM_MAX) / 4][4/* slot */] =
{
{ 0, 16, 32, 48 }, { 1, 17, 33, 49 },
{ 2, 18, 34, 50 }, { 4, 20, 36, 52 },
{ 5, 21, 37, 53 }, { 6, 22, 38, 54 },
{ 8, 24, 40, 56 }, { 9, 25, 41, 57 },
{ 10, 26, 42, 58 }, { 12, 28, 44, 60 },
{ 13, 29, 45, 61 }, { 14, 30, 46, 62 },
{ 3, 19, 35, 51 }, { 7, 23, 39, 55 },
{ 11, 27, 43, 59 }, { 15, 31, 47, 63 }
};
// Channel_4xOP index to Channel_2xOP index pairs
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(ch4x_to_pair)[AYMO_(CHANNEL_NUM_MAX) / 2][2/* slot */] =
{
{ 0, 3 }, { 1, 4 }, { 2, 5 },
{ 9, 12 }, { 10, 13 }, { 11, 14 },
{ 6, 21 }, { 7, 22 }, { 8, 23 },
{ 15, 18 }, { 16, 19 }, { 17, 20 },
{ 24, 25 }, { 26, 27 }, { 28, 29 }, { 30, 31 }
};
// Paired Channel_2xOP index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(ch2x_paired)[AYMO_(CHANNEL_NUM_MAX)] =
{
3, 4, 5,
0, 1, 2,
21, 22, 23,
12, 13, 14,
9, 10, 11,
18, 19, 20,
15, 16, 17,
6, 7, 8,
25, 24, 27, 26,
29, 28, 31, 30
};
// Slot group index to Channel group index
AYMO_INLINE
int aymo_(sgi_to_cgi)(int sgi)
{
// return (((sgi / 4) * 2) | (sgi % 2));
return (((sgi >> 1) & 2) | (sgi & 1));
}
// Sub-address to Slot index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(subaddr_to_slot)[AYMO_(SLOT_NUM_MAX)] =
{
0, 1, 2, 3, 4, 5, 48, 49,
6, 7, 8, 9, 10, 11, 50, 51,
12, 13, 14, 15, 16, 17, 52, 53,
36, 37, 38, 39, 40, 41, 54, 55,
18, 19, 20, 21, 22, 23, 56, 57,
24, 25, 26, 27, 28, 29, 58, 59,
30, 31, 32, 33, 34, 35, 60, 61,
42, 43, 44, 45, 46, 47, 62, 63
};
// Address to Slot index
AYMO_INLINE
int8_t aymo_(addr_to_slot)(uint16_t address)
{
uint16_t subaddr = ((address & 0x1F) | ((address >> 8) & 1));
int8_t slot = aymo_(subaddr_to_slot)[subaddr];
return slot;
}
// TODO: slot_to_addr[]
// Sub-addres to Channel_2xOP index
AYMO_STATIC AYMO_ALIGN_V16
const int8_t aymo_(subaddr_to_ch2x)[AYMO_(CHANNEL_NUM_MAX)] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8,
18, 19, 20, 21, 22, 23, 24,
9, 10, 11, 12, 13, 14, 15, 16, 17,
25, 26, 27, 28, 29, 30, 31
};
// Address to Channel_2xOP index
AYMO_INLINE
int8_t aymo_(addr_to_ch2x)(uint16_t address)
{
uint16_t subaddr = ((address & 0x0F) | ((address >> 8) & 1));
int8_t ch2x = aymo_(subaddr_to_ch2x)[subaddr];
return ch2x;
}
// TODO: ch2x_to_addr[]
AYMO_STATIC
const int8_t aymo_(pg_mult_x2_table)[16] =
{
1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 20, 24, 24, 30, 30
};
AYMO_STATIC
const int8_t aymo_(eg_ksl_table)[16] =
{
0, 32, 40, 45, 48, 51, 53, 55, 56, 58, 59, 60, 61, 62, 63, 64
};
AYMO_STATIC
const int8_t aymo_(eg_kslsh_table)[4] =
{
8, 1, 2, 0
};
AYMO_STATIC
const int16_t aymo_(eg_incstep_table)[4] =
{
((1 << 3) | (1 << 2) | (1 << 1) | (0 << 0)),
((1 << 3) | (0 << 2) | (0 << 1) | (0 << 0)),
((1 << 3) | (1 << 2) | (0 << 1) | (0 << 0)),
((0 << 3) | (0 << 2) | (0 << 1) | (0 << 0))
};
// Wave descriptors
AYMO_STATIC AYMO_ALIGN_V16
const struct aymo_(wave) aymo_(wave_table)[8] =
{
{ 0, 0x0000, 0x0200, 0x0100, 0x00FF, -1 },
{ 0, 0x0200, 0x0000, 0x0100, 0x00FF, -1 },
{ 0, 0x0000, 0x0000, 0x0100, 0x00FF, -1 },
{ 0, 0x0100, 0x0000, 0x0100, 0x00FF, -1 },
{ 1, 0x0400, 0x0200, 0x0100, 0x00FF, -1 },
{ 1, 0x0400, 0x0000, 0x0100, 0x00FF, -1 },
{ 0, 0x0000, 0x0200, 0x0200, 0x0001, 0 },
{ 3, 0x0000, 0x1000, 0x1000, 0x1FFF, 0 }
};
// 2-channel connection descriptors
AYMO_STATIC AYMO_ALIGN_V16
const struct aymo_(conn) aymo_(conn_ch2x_table)[2/* cnt */][2/* slot */] =
{
{
{ -1, 0, 0 },
{ 0, -1, -1 }
},
{
{ -1, 0, -1 },
{ 0, 0, -1 }
},
};
// 4-channel connection descriptors
AYMO_STATIC AYMO_ALIGN_V16
const struct aymo_(conn) aymo_(conn_ch4x_table)[4/* cnt */][4/* slot */] =
{
{
{ -1, 0, 0 },
{ 0, -1, 0 },
{ 0, -1, 0 },
{ 0, -1, -1 }
},
{
{ -1, 0, 0 },
{ 0, -1, -1 },
{ 0, 0, 0 },
{ 0, -1, -1 }
},
{
{ -1, 0, -1 },
{ 0, 0, 0 },
{ 0, -1, 0 },
{ 0, -1, -1 }
},
{
{ -1, 0, -1 },
{ 0, 0, 0 },
{ 0, -1, -1 },
{ 0, 0, -1 }
},
};
// Rhythm connection descriptors
AYMO_STATIC AYMO_ALIGN_V16
const struct aymo_(conn) aymo_(conn_ryt_table)[4][2/* slot */] =
{
// Channel 6: BD, FM
{
{ -1, 0, 0 },
{ 0, -1, -1 }
},
// Channel 6: BD, AM
{
{ -1, 0, 0 },
{ 0, 0, -1 }
},
// Channel 7: HH + SD
{
{ 0, 0, -1 },
{ 0, 0, -1 }
},
// Channel 8: TT + TC
{
{ 0, 0, -1 },
{ 0, 0, -1 }
}
};
// Slot mask output delay for outputs A and C
AYMO_STATIC
const uint8_t aymo_(og_prout_ac)[AYMO_(SLOT_GROUP_NUM)] =
{
0xF8,
0xF8,
0xF8,
0xFF,
0xF8,
0xFF,
0xF8,
0xFF
};
// Slot mask output delay for outputs B and D
AYMO_STATIC
const uint8_t aymo_(og_prout_bd)[AYMO_(SLOT_GROUP_NUM)] =
{
0x88,
0xF8,
0x88,
0xF8,
0x88,
0xFF,
0x88,
0xFF
};
// Updates wave generators
AYMO_INLINE
void aymo_(wg_update)(
struct aymo_(chip)* chip,
struct aymo_(ch2x_group)* cg,
struct aymo_(slot_group)* sg
)
{
// Compute feedback and modulation inputs
aymoi16_t fbsum = vadd(sg->wg_out, sg->wg_prout);
aymoi16_t fbsum_sh = vsllv(fbsum, sg->wg_fb_shs);
aymoi16_t prmod = vand(chip->wg_mod, sg->wg_prmod_gate);
aymoi16_t fbmod = vand(fbsum_sh, sg->wg_fbmod_gate);
sg->wg_prout = sg->wg_out;
// Compute operator phase input
aymoi16_t modsum = vadd(fbmod, prmod);
aymoi16_t phase = vadd(sg->pg_phase_out, modsum);
// Process phase
aymoi16_t phase_sped = vsllv(phase, sg->wg_phase_shl);
aymoi16_t phase_gate = vcmpz(vand(phase_sped, sg->wg_phase_zero));
aymoi16_t phase_flip = vcmpp(vand(phase_sped, sg->wg_phase_flip));
aymoi16_t phase_mask = sg->wg_phase_mask;
aymoi16_t phase_xor = vand(phase_flip, phase_mask);
aymoi16_t phase_idx = vxor(phase_sped, phase_xor);
aymoi16_t phase_out = vand(vand(phase_gate, phase_mask), phase_idx);
// Compute logsin variant
aymoi16_t phase_lo = phase_out; // vgather() masks to low byte
aymoi16_t logsin_val = vgather(aymo_(logsin_table), phase_lo);
logsin_val = vblendv(vset1(0x1000), logsin_val, phase_gate);
// Compute exponential output
aymoi16_t exp_in = vblendv(phase_out, logsin_val, sg->wg_sine_gate);
aymoi16_t exp_level = vadd(exp_in, vslli(sg->eg_out, 3));
exp_level = vmini(exp_level, vset1(0x1FFF));
aymoi16_t exp_level_lo = exp_level; // vgather() masks to low byte
aymoi16_t exp_level_hi = vsrli(exp_level, 8);
aymoi16_t exp_value = vgather(aymo_(exp_x2_table), exp_level_lo);
aymoi16_t exp_out = vsrlv(exp_value, exp_level_hi);
// Compute operator wave output
aymoi16_t wave_pos = vcmpz(vand(phase_sped, sg->wg_phase_neg));
aymoi16_t wave_neg = vandnot(wave_pos, phase_gate);
aymoi16_t wave_out = vxor(exp_out, wave_neg);
sg->wg_out = wave_out;
chip->wg_mod = wave_out;
// Update chip output accumulators, with quirky slot output delay
aymoi16_t og_out_ac = vblendv(wave_out, sg->og_prout, sg->og_prout_ac);
aymoi16_t og_out_bd = vblendv(wave_out, sg->og_prout, sg->og_prout_bd);
sg->og_prout = wave_out;
chip->og_acc_a = vadd(chip->og_acc_a, vand(og_out_ac, sg->og_out_ch_gate_a));
chip->og_acc_c = vadd(chip->og_acc_c, vand(og_out_ac, sg->og_out_ch_gate_c));
chip->og_acc_b = vadd(chip->og_acc_b, vand(og_out_bd, sg->og_out_ch_gate_b));
chip->og_acc_d = vadd(chip->og_acc_d, vand(og_out_bd, sg->og_out_ch_gate_d));
#ifdef AYMO_DEBUG
sg->wg_fbmod = fbsum_sh;
sg->wg_mod = modsum;
#endif
}
// Updates envelope generators
AYMO_INLINE
void aymo_(eg_update)(
struct aymo_(chip)* chip,
struct aymo_(ch2x_group)* cg,
struct aymo_(slot_group)* sg
)
{
(void)cg;
// Compute envelope output
sg->eg_out = vadd(
vadd(sg->eg_rout, sg->eg_tl_x4),
vadd(sg->eg_ksl_sh, sg->eg_tremolo_am)
);
// Compute rate
aymoi16_t eg_gen_rel = vcmpeq(sg->eg_gen, vset1(AYMO_(EG_GEN_RELEASE)));
aymoi16_t notreset = vcmpz(vand(sg->eg_key, eg_gen_rel));
sg->pg_notreset = notreset;
aymoi16_t eg_gen_shl = vblendv(vset1(AYMO_(EG_GEN_SHL_ATTACK)), sg->eg_gen_shl, notreset);
aymoi16_t reg_rate = vsllv(sg->eg_adsr, eg_gen_shl); // move to top nibble
aymoi16_t rate_temp = vand(reg_rate, vset1((int16_t)0xF000)); // keep top nibble
rate_temp = vsrli(rate_temp, AYMO_(EG_GEN_SRLHI));
aymoi16_t rate = vadd(sg->eg_ks, rate_temp);
aymoi16_t rate_lo = vand(rate, vset1(3));
aymoi16_t rate_hi = vsrli(rate, 2);
rate_hi = vmini(rate_hi, vset1(15));
// Compute shift
aymoi16_t eg_shift = vadd(rate_hi, chip->eg_add);
aymoi16_t rate_pre_lt12 = vor(vslli(rate_lo, 1), vset1(8));
aymoi16_t shift_lt12 = vsrlv(rate_pre_lt12, vu2i(vsubsu(vi2u(vset1(15)), vi2u(eg_shift))));
shift_lt12 = vand(shift_lt12, chip->eg_statev);
aymoi16_t incstep_ge12 = vand(vsrlv(chip->eg_incstep, rate_lo), vset1(1));
aymoi16_t shift_ge12 = vadd(vand(rate_hi, vset1(3)), incstep_ge12);
shift_ge12 = vmini(shift_ge12, vset1(3));
shift_ge12 = vblendv(shift_ge12, chip->eg_statev, vcmpz(shift_ge12));
aymoi16_t shift = vblendv(shift_lt12, shift_ge12, vcmpgt(rate_hi, vset1(11)));
shift = vandnot(vcmpz(rate_temp), shift);
// Instant attack
aymoi16_t eg_rout = sg->eg_rout;
eg_rout = vandnot(vandnot(notreset, vcmpeq(rate_hi, vset1(15))), eg_rout);
// Envelope off
aymoi16_t eg_off = vcmpgt(sg->eg_rout, vset1(0x01F7));
aymoi16_t eg_gen_natk_and_nrst = vand(vcmpp(sg->eg_gen), notreset);
eg_rout = vblendv(eg_rout, vset1(0x01FF), vand(eg_gen_natk_and_nrst, eg_off));
// Compute common increment not in attack state
aymoi16_t eg_inc_natk_cond = vand(vand(notreset, vcmpz(eg_off)), vcmpp(shift));
aymoi16_t eg_inc_natk = vand(eg_inc_natk_cond, vpow2m1lt4(shift));
aymoi16_t eg_gen = sg->eg_gen;
// Move attack to decay state
aymoi16_t eg_inc_atk_cond = vand(vand(vcmpp(sg->eg_key), vcmpp(shift)),
vand(vcmpz(sg->eg_gen), vcmpgt(vset1(15), rate_hi)));
aymoi16_t eg_inc_atk_ninc = vsrlv(sg->eg_rout, vsub(vset1(4), shift));
aymoi16_t eg_inc = vandnot(eg_inc_atk_ninc, eg_inc_atk_cond);
aymoi16_t eg_gen_atk_to_dec = vcmpz(vor(sg->eg_gen, sg->eg_rout));
eg_gen = vsub(eg_gen, eg_gen_atk_to_dec); // 0 --> 1
eg_inc = vblendv(eg_inc_natk, eg_inc, vcmpz(sg->eg_gen));
eg_inc = vandnot(eg_gen_atk_to_dec, eg_inc);
// Move decay to sustain state
aymoi16_t eg_gen_dec = vcmpeq(sg->eg_gen, vset1(AYMO_(EG_GEN_DECAY)));
aymoi16_t sl_hit = vcmpeq(vsrli(sg->eg_rout, 4), sg->eg_sl);
aymoi16_t eg_gen_dec_to_sus = vand(eg_gen_dec, sl_hit);
eg_gen = vsub(eg_gen, eg_gen_dec_to_sus); // 1 --> 2
eg_inc = vandnot(eg_gen_dec_to_sus, eg_inc);
// Move back to attack state
eg_gen = vand(notreset, eg_gen); // * --> 0
// Move to release state
eg_gen = vor(eg_gen, vsrli(vcmpz(sg->eg_key), 14)); // * --> 3
// Update envelope generator
eg_rout = vadd(eg_rout, eg_inc);
eg_rout = vand(eg_rout, vset1(0x01FF));
sg->eg_rout = eg_rout;
sg->eg_gen = eg_gen;
sg->eg_gen_shl = vslli(eg_gen, 2);
#ifdef AYMO_DEBUG
sg->eg_rate = rate;
sg->eg_inc = eg_inc;
#endif
}
// Updates phase generator
AYMO_INLINE
void aymo_(pg_update_deltafreq)(
struct aymo_(chip)* chip,
struct aymo_(ch2x_group)* cg,
struct aymo_(slot_group)* sg
)
{
// Update phase
aymoi16_t fnum = cg->pg_fnum;
aymoi16_t range = vand(fnum, vset1(7 << 7));
range = vand(sg->pg_vib, vsllv(range, chip->pg_vib_shs));
range = vmullo(range, chip->pg_vib_sign);
fnum = vadd(fnum, range);
aymoi32_t fnum_lo = vunpacklo(fnum);
aymoi32_t fnum_hi = vunpackhi(fnum);
aymoi32_t block_sll_lo = vunpacklo(cg->pg_block);
aymoi32_t block_sll_hi = vunpackhi(cg->pg_block);
aymoi32_t basefreq_lo = vvsrli(vvsllv(fnum_lo, block_sll_lo), 1);
aymoi32_t basefreq_hi = vvsrli(vvsllv(fnum_hi, block_sll_hi), 1);
aymoi32_t pg_mult_x2_lo = vunpacklo(sg->pg_mult_x2);
aymoi32_t pg_mult_x2_hi = vunpackhi(sg->pg_mult_x2);
aymoi32_t deltafreq_lo = vvsrli(vvmullo(basefreq_lo, pg_mult_x2_lo), 1);
aymoi32_t deltafreq_hi = vvsrli(vvmullo(basefreq_hi, pg_mult_x2_hi), 1);
sg->pg_deltafreq_lo = deltafreq_lo;
sg->pg_deltafreq_hi = deltafreq_hi;
}
// Updates phase generator
AYMO_INLINE
void aymo_(pg_update)(
struct aymo_(chip)* chip,
struct aymo_(ch2x_group)* cg,
struct aymo_(slot_group)* sg
)
{
(void)cg;
// Compute phase output
aymoi32_t phase_out_mask = vvset1(0xFFFF);
aymoi32_t phase_out_lo = vvand(vvsrli(sg->pg_phase_lo, 9), phase_out_mask);
aymoi32_t phase_out_hi = vvand(vvsrli(sg->pg_phase_hi, 9), phase_out_mask);
aymoi16_t phase_out = vvpack(phase_out_lo, phase_out_hi);
sg->pg_phase_out = phase_out;
// Update phase
aymoi32_t notreset_lo = vunpacklo(sg->pg_notreset);
aymoi32_t notreset_hi = vunpackhi(sg->pg_notreset);
aymoi32_t pg_phase_lo = vvand(notreset_lo, sg->pg_phase_lo);
aymoi32_t pg_phase_hi = vvand(notreset_hi, sg->pg_phase_hi);
sg->pg_phase_lo = vvadd(pg_phase_lo, sg->pg_deltafreq_lo);
sg->pg_phase_hi = vvadd(pg_phase_hi, sg->pg_deltafreq_hi);
}
// Updates noise generator
AYMO_INLINE
void aymo_(ng_update)(struct aymo_(chip)* chip, unsigned times)
{
// Update noise
uint32_t noise = chip->ng_noise;
while (times--) {
uint32_t n_bit = (((noise >> 14) ^ noise) & 1);
noise = ((noise >> 1) | (n_bit << 22));
}
chip->ng_noise = noise;
}
// Updates rhythm manager, slot group 1
AYMO_INLINE
void aymo_(rm_update_sg1)(struct aymo_(chip)* chip)
{
struct aymo_(slot_group)* sg = &chip->sg[1];
if (chip->chip_regs.reg_BDh.ryt) {
// Double rhythm outputs
aymoi16_t ryt_slot_mask = vsetr(-1, -1, -1, 0, 0, 0, 0, 0);
aymoi16_t wave_out = vand(sg->wg_out, ryt_slot_mask);
chip->og_acc_a = vadd(chip->og_acc_a, vand(wave_out, sg->og_out_ch_gate_a));
chip->og_acc_b = vadd(chip->og_acc_b, vand(wave_out, sg->og_out_ch_gate_b));
chip->og_acc_c = vadd(chip->og_acc_c, vand(wave_out, sg->og_out_ch_gate_c));
chip->og_acc_d = vadd(chip->og_acc_d, vand(wave_out, sg->og_out_ch_gate_d));
}
aymoi16_t phase = sg->pg_phase_out;
uint16_t phase13 = (uint16_t)vextract(phase, 1);
// Update noise bits
chip->rm_hh_bit2 = ((phase13 >> 2) & 1);
chip->rm_hh_bit3 = ((phase13 >> 3) & 1);
chip->rm_hh_bit7 = ((phase13 >> 7) & 1);
chip->rm_hh_bit8 = ((phase13 >> 8) & 1);
if (chip->chip_regs.reg_BDh.ryt) {
// Calculate noise bit
uint16_t rm_xor = (
(chip->rm_hh_bit2 ^ chip->rm_hh_bit7) |
(chip->rm_hh_bit3 ^ chip->rm_tc_bit5) |
(chip->rm_tc_bit3 ^ chip->rm_tc_bit5)
);
// Update HH
uint16_t noise = (uint16_t)chip->ng_noise;
phase13 = (rm_xor << 9);
if (rm_xor ^ (noise & 1)) {
phase13 |= 0xD0;
} else {
phase13 |= 0x34;
}
phase = vinsert(phase, (int16_t)phase13, 1);
sg->pg_phase_out = phase;
}
}
// Updates rhythm manager, slot group 3
AYMO_INLINE
void aymo_(rm_update_sg3)(struct aymo_(chip)* chip)
{
struct aymo_(slot_group)* sg = &chip->sg[3];
if (chip->chip_regs.reg_BDh.ryt) {
// Double rhythm outputs
aymoi16_t ryt_slot_mask = vsetr(-1, -1, -1, 0, 0, 0, 0, 0);
aymoi16_t wave_out = vand(sg->wg_out, ryt_slot_mask);
chip->og_acc_a = vadd(chip->og_acc_a, vand(wave_out, sg->og_out_ch_gate_a));
chip->og_acc_b = vadd(chip->og_acc_b, vand(wave_out, sg->og_out_ch_gate_b));
chip->og_acc_c = vadd(chip->og_acc_c, vand(wave_out, sg->og_out_ch_gate_c));
chip->og_acc_d = vadd(chip->og_acc_d, vand(wave_out, sg->og_out_ch_gate_d));
// Calculate noise bit
uint16_t rm_xor = (
(chip->rm_hh_bit2 ^ chip->rm_hh_bit7) |
(chip->rm_hh_bit3 ^ chip->rm_tc_bit5) |
(chip->rm_tc_bit3 ^ chip->rm_tc_bit5)
);
aymoi16_t phase = sg->pg_phase_out;
// Update SD
uint16_t noise = (uint16_t)chip->ng_noise;
uint16_t phase16 = (
((uint16_t)chip->rm_hh_bit8 << 9) |
((uint16_t)(chip->rm_hh_bit8 ^ (noise & 1)) << 8)
);
phase = vinsert(phase, (int16_t)phase16, 1);
// Update TC
uint32_t phase17 = vextract(phase, 2);
chip->rm_tc_bit3 = ((phase17 >> 3) & 1);
chip->rm_tc_bit5 = ((phase17 >> 5) & 1);
phase17 = ((rm_xor << 9) | 0x80);
phase = vinsert(phase, (int16_t)phase17, 2);
sg->pg_phase_out = phase;
}
}
// Updates slot generators
AYMO_STATIC
void aymo_(sg_update)(
struct aymo_(chip)* chip,
struct aymo_(ch2x_group)* cg,
struct aymo_(slot_group)* sg
)
{
aymo_(eg_update)(chip, cg, sg);
aymo_(pg_update)(chip, cg, sg);
aymo_(wg_update)(chip, cg, sg);
}
// Clear output accumulators
AYMO_INLINE
void aymo_(og_clear)(struct aymo_(chip)* chip)
{
chip->og_acc_a = vsetz();
chip->og_acc_b = vsetz();
chip->og_acc_c = vsetz();
chip->og_acc_d = vsetz();
}
// Updates output mixdown
AYMO_INLINE
void aymo_(og_update)(struct aymo_(chip)* chip)
{
chip->og_sum_a = vhsum(chip->og_acc_a);
chip->og_sum_b = vhsum(chip->og_acc_b);
chip->og_sum_c = vhsum(chip->og_acc_c);
chip->og_sum_d = vhsum(chip->og_acc_d);
chip->og_out_a = clamp16(chip->og_sum_a);
chip->og_out_b = chip->og_del_b;
chip->og_del_b = clamp16(chip->og_sum_b);
chip->og_out_c = clamp16(chip->og_sum_c);
chip->og_out_d = chip->og_del_d;
chip->og_del_d = clamp16(chip->og_sum_d);
}
// Updates timer management
AYMO_INLINE
void aymo_(tm_update)(struct aymo_(chip)* chip)
{
// Update tremolo
if ((chip->tm_timer & 0x3F) == 0x3F) {
chip->eg_tremolopos = ((chip->eg_tremolopos + 1) % 210);
uint16_t eg_tremolopos = chip->eg_tremolopos;
if (eg_tremolopos >= 105) {
eg_tremolopos = (210 - eg_tremolopos);
}
aymoi16_t eg_tremolo = vset1((int16_t)(eg_tremolopos >> chip->eg_tremoloshift));
for (int sgi = 0; sgi < AYMO_(SLOT_GROUP_NUM); ++sgi) {
struct aymo_(slot_group)* sg = &chip->sg[sgi];
sg->eg_tremolo_am = vand(eg_tremolo, sg->eg_am);
}
}
// Update vibrato
if ((chip->tm_timer & 0x3FF) == 0x3FF) {
chip->pg_vibpos = ((chip->pg_vibpos + 1) & 7);
uint8_t vibpos = chip->pg_vibpos;
int16_t pg_vib_shs = -7;
int16_t pg_vib_sign = +1;
if (!(vibpos & 3)) {
pg_vib_shs = +16;
}
else if (vibpos & 1) {
pg_vib_shs -= 1;
}
pg_vib_shs -= (int16_t)(uint16_t)chip->eg_vibshift;
if (vibpos & 4) {
pg_vib_sign = -1;
}
chip->pg_vib_shs = vset1(pg_vib_shs);
chip->pg_vib_sign = vset1(pg_vib_sign);
for (int sgi = 0; sgi < AYMO_(SLOT_GROUP_NUM); ++sgi) {
int cgi = aymo_(sgi_to_cgi)(sgi);
struct aymo_(ch2x_group)* cg = &chip->cg[cgi];
struct aymo_(slot_group)* sg = &chip->sg[sgi];
aymo_(pg_update_deltafreq)(chip, cg, sg);
}
}
chip->tm_timer++;
int16_t eg_incstep = aymo_(eg_incstep_table)[chip->tm_timer & 3];
chip->eg_incstep = vset1(eg_incstep);
// Update timed envelope patterns
int16_t eg_shift = (int16_t)ffsll((long long)chip->eg_timer);
int16_t eg_add = ((eg_shift > 13) ? 0 : eg_shift);
chip->eg_add = vset1(eg_add);
// Update envelope timer and flip state
if (chip->eg_state || ((chip->eg_timer & AYMO_(EG_TIMER_MASK)) == 0)) {
chip->eg_timer = (((chip->eg_timer + 1) & AYMO_(EG_TIMER_MASK)) | AYMO_(EG_TIMER_HIBIT));
}
chip->eg_state ^= 1;
chip->eg_statev = vset1((int16_t)chip->eg_state);
}
// Updates the register queue
AYMO_INLINE
void aymo_(rq_update)(struct aymo_(chip)* chip)
{
if (chip->rq_delay) {
if (--chip->rq_delay) {
return;
}
}
if (chip->rq_head != chip->rq_tail) {
struct aymo_(reg_queue_item)* item = &chip->rq_buffer[chip->rq_head];
if (item->address & 0x8000U) {
chip->rq_delay = AYMO_(REG_QUEUE_LATENCY);
chip->rq_delay += (((uint32_t)(item->address & 0x7FFFU) << 16) | item->value);
}
else {
aymo_(write)(chip, item->address, item->value);
}
if (++chip->rq_head >= AYMO_(REG_QUEUE_LENGTH)) {
chip->rq_head = 0;
}
}
}
// Exceutes a single processing tick
void aymo_(tick)(struct aymo_(chip)* chip)
{
int sgi;
int cgi;
// Clear output accumulators
aymo_(og_clear)(chip);
// Process slot group 0
sgi = 0;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
// Process slot group 2
sgi = 2;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
// Process slot group 4
sgi = 4;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
// Process slot group 6
sgi = 6;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
// Process slot group 1
sgi = 1;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
aymo_(ng_update)(chip, (36 - 3)); // slot 16 --> slot 13
aymo_(rm_update_sg1)(chip);
// Process slot group 3
sgi = 3;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
aymo_(ng_update)(chip, 3); // slot 13 --> slot 16
aymo_(rm_update_sg3)(chip);
if (chip->process_all_slots) {
// Process slot group 5
sgi = 5;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
// Process slot group 7
sgi = 7;
cgi = aymo_(sgi_to_cgi)(sgi);
aymo_(sg_update)(chip, &chip->cg[cgi], &chip->sg[sgi]);
}
// Update outputs
aymo_(og_update)(chip);
// Update timers
aymo_(tm_update)(chip);
// Dequeue registers
aymo_(rq_update)(chip);
}
AYMO_STATIC
void aymo_(eg_update_ksl)(struct aymo_(chip)* chip, int word)
{
int slot = aymo_(word_to_slot)[word];
int sgi = (word / AYMO_(SLOT_GROUP_LENGTH));
int sgo = (word % AYMO_(SLOT_GROUP_LENGTH));
int cgi = aymo_(sgi_to_cgi)(sgi);
struct aymo_(ch2x_group)* cg = &(chip->cg[cgi]);
struct aymo_(slot_group)* sg = &(chip->sg[sgi]);
struct aymo_(reg_40h)* reg_40h = &(chip->slot_regs[slot].reg_40h);
int16_t pg_fnum = vextractn(cg->pg_fnum, sgo);
int16_t pg_fnum_hn = ((pg_fnum >> 6) & 15);
int ch2x = aymo_(word_to_ch2x)[aymo_(slot_to_word)[slot]];
int16_t eg_block = (int16_t)(chip->ch2x_regs[ch2x].reg_B0h.block);
int16_t eg_ksl = aymo_(eg_ksl_table)[pg_fnum_hn];
eg_ksl = ((eg_ksl << 2) - ((8 - eg_block) << 5));
if (eg_ksl < 0) {
eg_ksl = 0;
}
int16_t eg_kslsh = aymo_(eg_kslsh_table)[reg_40h->ksl];
int16_t eg_ksl_sh = (eg_ksl >> eg_kslsh);
sg->eg_ksl_sh = vinsertn(sg->eg_ksl_sh, eg_ksl_sh, sgo);
#ifdef AYMO_DEBUG
sg->eg_ksl = vinsertn(sg->eg_ksl, eg_ksl, sgo);
#endif
}
AYMO_STATIC
void aymo_(chip_pg_update_nts)(struct aymo_(chip)* chip)
{
for (int slot = 0; slot < AYMO_(SLOT_NUM_MAX); ++slot) {
int word = aymo_(slot_to_word)[slot];