; OPNGENARMを定義するか SIN_BITS,EVC_BITSの設定を合せること。
FMDIV_BITS equ 8
FMDIV_ENT equ (1 << FMDIV_BITS)
FMVOL_SFTBIT equ 4
SIN_BITS equ 8
EVC_BITS equ 7
ENV_BITS equ 16
KF_BITS equ 6
FREQ_BITS equ 20
ENVTBL_BIT equ 14
SINTBL_BIT equ 14
TL_BITS equ (FREQ_BITS+2)
OPM_OUTSB equ (TL_BITS + 2 - 16)
SIN_ENT equ (1 << SIN_BITS)
EVC_ENT equ (1 << EVC_BITS)
EC_ATTACK equ 0
EC_DECAY equ (EVC_ENT << ENV_BITS)
EC_OFF equ ((2 * EVC_ENT) << ENV_BITS)
EM_ATTACK equ 4
EM_DECAY1 equ 3
EM_DECAY2 equ 2
EM_RELEASE equ 1
EM_OFF equ 0
; s_detune1 equ 0
S1_TOTALLEVEL equ 4
S1_DECAYLEVEL equ 8
; s_attack equ 12
; s_decay1 equ 16
; s_decay2 equ 20
; s_release equ 24
S1_FREQ_CNT equ 28
S1_FREQ_INC equ 32
; s_multiple equ 36
; s_keyscale equ 40
S1_ENV_MODE equ 41
; s_envraito equ 42
; s_ssgeg1 equ 43
S1_ENV_CNT equ 44
S1_ENV_END equ 48
S1_ENV_INC equ 52
; s_env_inc_attack equ 56
S1_ENVINCDECAY1 equ 60
S1_ENVINCDECAY2 equ 64
; s_env_inc_release equ 68
S_SIZE equ 72
S2_ENV_INC equ (S_SIZE * 1 + S1_ENV_INC)
S2_ENV_CNT equ (S_SIZE * 1 + S1_ENV_CNT)
S2_ENV_END equ (S_SIZE * 1 + S1_ENV_END)
S2_TOTALLEVEL equ (S_SIZE * 1 + S1_TOTALLEVEL)
S2_FREQ_INC equ (S_SIZE * 1 + S1_FREQ_INC)
S2_FREQ_CNT equ (S_SIZE * 1 + S1_FREQ_CNT)
S2_ENV_MODE equ (S_SIZE * 1 + S1_ENV_MODE)
S2_DECAYLEVEL equ (S_SIZE * 1 + S1_DECAYLEVEL)
S2_ENVINCDECAY1 equ (S_SIZE * 1 + S1_ENVINCDECAY1)
S2_ENVINCDECAY2 equ (S_SIZE * 1 + S1_ENVINCDECAY2)
S3_ENV_INC equ (S_SIZE * 2 + S1_ENV_INC)
S3_ENV_CNT equ (S_SIZE * 2 + S1_ENV_CNT)
S3_ENV_END equ (S_SIZE * 2 + S1_ENV_END)
S3_TOTALLEVEL equ (S_SIZE * 2 + S1_TOTALLEVEL)
S3_FREQ_INC equ (S_SIZE * 2 + S1_FREQ_INC)
S3_FREQ_CNT equ (S_SIZE * 2 + S1_FREQ_CNT)
S3_ENV_MODE equ (S_SIZE * 2 + S1_ENV_MODE)
S3_DECAYLEVEL equ (S_SIZE * 2 + S1_DECAYLEVEL)
S3_ENVINCDECAY1 equ (S_SIZE * 2 + S1_ENVINCDECAY1)
S3_ENVINCDECAY2 equ (S_SIZE * 2 + S1_ENVINCDECAY2)
S4_ENV_INC equ (S_SIZE * 3 + S1_ENV_INC)
S4_ENV_CNT equ (S_SIZE * 3 + S1_ENV_CNT)
S4_ENV_END equ (S_SIZE * 3 + S1_ENV_END)
S4_TOTALLEVEL equ (S_SIZE * 3 + S1_TOTALLEVEL)
S4_FREQ_INC equ (S_SIZE * 3 + S1_FREQ_INC)
S4_FREQ_CNT equ (S_SIZE * 3 + S1_FREQ_CNT)
S4_ENV_MODE equ (S_SIZE * 3 + S1_ENV_MODE)
S4_DECAYLEVEL equ (S_SIZE * 3 + S1_DECAYLEVEL)
S4_ENVINCDECAY1 equ (S_SIZE * 3 + S1_ENVINCDECAY1)
S4_ENVINCDECAY2 equ (S_SIZE * 3 + S1_ENVINCDECAY2)
; C_algorithm equ (S_SIZE * 4 + 0)
C_FEEDBACK equ (S_SIZE * 4 + 1)
C_PLAYING equ (S_SIZE * 4 + 2)
C_OUTSLOT equ (S_SIZE * 4 + 3)
C_OP1FB equ (S_SIZE * 4 + 4)
C_CONNECT1 equ (S_SIZE * 4 + 8)
C_CONNECT3 equ (S_SIZE * 4 + 12)
C_CONNECT2 equ (S_SIZE * 4 + 16)
C_CONNECT4 equ (S_SIZE * 4 + 20)
; C_keynote equ (S_SIZE * 4 + 24)
; C_keyfunc equ (S_SIZE * 4 + 40)
; C_kcode equ (S_SIZE * 4 + 44)
; C_pan equ (S_SIZE * 4 + 48)
; C_extop equ (S_SIZE * 4 + 49)
; C_stereo equ (S_SIZE * 4 + 50)
; C_padding2 equ (S_SIZE * 4 + 51)
C_SIZE equ (S_SIZE * 4 + 52)
G_PLAYCHANNELS equ 0
G_PLAYING equ 4
G_FEEDBACK2 equ 8
G_FEEDBACK3 equ 12
G_FEEDBACK4 equ 16
G_OUTDL equ 20
G_OUTDC equ 24
G_OUTDR equ 28
G_CALCREMAIN equ 32
; G_keyreg equ 36
T_ORG equ 24
T_CALC1024 equ (0 - T_ORG)
T_FMVOL equ (4 - T_ORG)
T_ratebit equ (8 - T_ORG)
T_vr_en equ (12 - T_ORG)
T_vr_l equ (16 - T_ORG)
T_vr_r equ (20 - T_ORG)
T_sintable equ (24 - T_ORG)
T_envtable equ (24 - T_ORG + SIN_ENT * 4)
T_envcurve equ (24 - T_ORG + SIN_ENT * 4 + EVC_ENT * 4)
IMPORT opnch
IMPORT opngen
IMPORT opncfg
EXPORT opngen_getpcm
EXPORT opngen_getpcmvr
AREA OPNGENA, CODE, READONLY
; r0 Temporary Register
; r1 Offset
; r2 Counter
; r3 Temporary Register
; r4 Temporary Register
; r5 channel counter
; r6 OPNCH
; r7 OPNCH base
; r8 L
; r9 R
; r10 opngen Fix
; r11 opncfg Fix
; r12 Temporary Register
opngen_getpcm
opngen_getpcmvr
cmp r2, #0
moveq pc, lr
ldr r12, dcd_opngen
ldr r3, [r12, #G_PLAYING]
cmp r3, #0
moveq pc, lr
stmdb sp!, {r4 - r11, lr}
ldr r7, dcd_opnch
mov r10, r12
ldr r11, dcd_opncfg
ldr lr, [r10, #G_CALCREMAIN]
ldr r3, [r10, #G_OUTDL]
ldr r4, [r10, #G_OUTDR]
getpcm_lp rsb r0, lr, #0
mul r8, r0, r3
mul r9, r0, r4
add lr, lr, #FMDIV_ENT
mksmp_lp mov r12, #0
str r12, [r10, #G_OUTDL]
str r12, [r10, #G_OUTDC]
str r12, [r10, #G_OUTDR]
ldr r5, [r10, #G_PLAYCHANNELS]
sub r5, r12, r5, lsl #8
mov r6, r7
slotcalc_lp ldrb r0, [r6, #C_PLAYING]
ldrb r12, [r6, #C_OUTSLOT]
tst r0, r12
beq slot5calc
add r5, r5, #1
mov r12, #0
str r12, [r10, #G_FEEDBACK2]
str r12, [r10, #G_FEEDBACK3]
str r12, [r10, #G_FEEDBACK4]
slot1calc ldr r3, [r6, #S1_ENV_INC] ; calc env
ldr r12, [r6, #S1_ENV_CNT]
add r3, r3, r12
ldr r12, [r6, #S1_ENV_END]
cmp r3, r12
bcs slot1update
s1calcenv str r3, [r6, #S1_ENV_CNT]
mov r3, r3, lsr #ENV_BITS
subs r12, r3, #EVC_ENT
addcc r12, r11, #T_envcurve ; r12 = opntbl.envcurve
ldrcc r12, [r12, r3, lsl #2]
ldr r0, [r6, #S1_TOTALLEVEL]
subs r0, r0, r12
ldr r3, [r6, #S1_FREQ_INC] ; freq
ldr r12, [r6, #S1_FREQ_CNT]
add r3, r3, r12
str r3, [r6, #S1_FREQ_CNT]
bls slot2calc
ldrb r4, [r6, #C_FEEDBACK]
cmp r4, #0
ldrne r12, [r6, #C_OP1FB]
addne r3, r3, r12 asr r4 ; back!
if 1
mov r3, r3, lsl #(32 - FREQ_BITS)
else
mov r3, r3, lsr #(FREQ_BITS - SIN_BITS)
mov r3, r3, lsl #(32 - SIN_BITS)
endif
mov r3, r3, lsr #(32 - SIN_BITS)
add r4, r11, #T_sintable ; r1 = opntbl.sintable
ldr r3, [r4, r3, lsl #2]
add r4, r11, #T_envtable ; r1 = opntbl.envtable
ldr r4, [r4, r0, lsl #2]
mul r3, r4, r3
mov r3, r3, asr #(ENVTBL_BIT + SINTBL_BIT - TL_BITS)
strne r3, [r6, #C_OP1FB]
addne r3, r3, r12
subne r3, r3, r3 asr #31 ; adjust....
movne r3, r3, asr #1
ldr r12, [r6, #C_CONNECT1]
cmp r12, #0
streq r3, [r10, #G_FEEDBACK2]
streq r3, [r10, #G_FEEDBACK3]
streq r3, [r10, #G_FEEDBACK4]
ldrne r0, [r12]
addne r0, r0, r3
strne r0, [r12]
slot2calc ldr r3, [r6, #S2_ENV_INC] ; calc env
ldr r12, [r6, #S2_ENV_CNT]
add r3, r3, r12
ldr r12, [r6, #S2_ENV_END]
cmp r3, r12
bcs slot2update
s2calcenv str r3, [r6, #S2_ENV_CNT]
mov r3, r3, lsr #ENV_BITS
subs r12, r3, #EVC_ENT
addcc r12, r11, #T_envcurve ; r12 = opntbl.envcurve
ldrcc r12, [r12, r3, lsl #2]
ldr r0, [r6, #S2_TOTALLEVEL]
subs r0, r0, r12
ldr r3, [r6, #S2_FREQ_INC] ; freq
ldr r12, [r6, #S2_FREQ_CNT]
add r3, r3, r12
str r3, [r6, #S2_FREQ_CNT]
bls slot3calc
ldr r12, [r10, #G_FEEDBACK2]
add r3, r3, r12
if 1
mov r3, r3, lsl #(32 - FREQ_BITS)
else
mov r3, r3, lsr #(FREQ_BITS - SIN_BITS)
mov r3, r3, lsl #(32 - SIN_BITS)
endif
mov r3, r3, lsr #(32 - SIN_BITS)
add r12, r11, #T_sintable ; r12 = opntbl.sintable
ldr r3, [r12, r3, lsl #2]
add r12, r11, #T_envtable ; r12 = opntbl.envtable
ldr r12, [r12, r0, lsl #2]
mul r3, r12, r3
ldr r12, [r6, #C_CONNECT2]
ldr r0, [r12]
add r0, r0, r3, asr #(ENVTBL_BIT + SINTBL_BIT - TL_BITS)
str r0, [r12]
slot3calc ldr r3, [r6, #S3_ENV_INC] ; calc env
ldr r12, [r6, #S3_ENV_CNT]
add r3, r3, r12
ldr r12, [r6, #S3_ENV_END]
cmp r3, r12
bcs slot3update
s3calcenv str r3, [r6, #S3_ENV_CNT]
mov r3, r3, lsr #ENV_BITS
subs r12, r3, #EVC_ENT
addcc r12, r11, #T_envcurve ; r12 = opntbl.envcurve
ldrcc r12, [r12, r3, lsl #2]
ldr r0, [r6, #S3_TOTALLEVEL]
subs r0, r0, r12
ldr r3, [r6, #S3_FREQ_INC] ; freq
ldr r12, [r6, #S3_FREQ_CNT]
add r3, r3, r12
str r3, [r6, #S3_FREQ_CNT]
bls slot4calc
ldr r12, [r10, #G_FEEDBACK3]
add r3, r3, r12
if 1
mov r3, r3, lsl #(32 - FREQ_BITS)
else
mov r3, r3, lsr #(FREQ_BITS - SIN_BITS)
mov r3, r3, lsl #(32 - SIN_BITS)
endif
mov r3, r3, lsr #(32 - SIN_BITS)
add r12, r11, #T_sintable ; r12 = opntbl.sintable
ldr r3, [r12, r3, lsl #2]
add r12, r11, #T_envtable ; r12 = opntbl.envtable
ldr r12, [r12, r0, lsl #2]
mul r3, r12, r3
ldr r12, [r6, #C_CONNECT3]
ldr r0, [r12]
add r0, r0, r3, asr #(ENVTBL_BIT + SINTBL_BIT - TL_BITS)
str r0, [r12]
slot4calc ldr r3, [r6, #S4_ENV_INC] ; calc env
ldr r12, [r6, #S4_ENV_CNT]
add r3, r3, r12
ldr r12, [r6, #S4_ENV_END]
cmp r3, r12
bcs slot4update
s4calcenv str r3, [r6, #S4_ENV_CNT]
mov r3, r3, lsr #ENV_BITS
subs r12, r3, #EVC_ENT
addcc r12, r11, #T_envcurve ; r12 = opntbl.envcurve
ldrcc r12, [r12, r3, lsl #2]
ldr r0, [r6, #S4_TOTALLEVEL]
subs r0, r0, r12
ldr r3, [r6, #S4_FREQ_INC] ; freq
ldr r12, [r6, #S4_FREQ_CNT]
add r3, r3, r12
str r3, [r6, #S4_FREQ_CNT]
bls slot5calc
ldr r12, [r10, #G_FEEDBACK4]
add r3, r3, r12
if 1
mov r3, r3, lsl #(32 - FREQ_BITS)
else
mov r3, r3, lsr #(FREQ_BITS - SIN_BITS)
mov r3, r3, lsl #(32 - SIN_BITS)
endif
mov r3, r3, lsr #(32 - SIN_BITS)
add r12, r11, #T_sintable ; r12 = opntbl.sintable
ldr r3, [r12, r3, lsl #2]
add r12, r11, #T_envtable ; r12 = opntbl.envtable
ldr r12, [r12, r0, lsl #2]
mul r3, r12, r3
ldr r12, [r6, #C_CONNECT4]
ldr r0, [r12]
add r0, r0, r3, asr #(ENVTBL_BIT + SINTBL_BIT - TL_BITS)
str r0, [r12]
slot5calc add r6, r6, #C_SIZE
adds r5, r5, #256
bcc slotcalc_lp
ldr r12, [r10, #G_OUTDC]
ldr r3, [r10, #G_OUTDL]
ldr r4, [r10, #G_OUTDR]
add r3, r3, r12
add r4, r4, r12
mov r3, r3, asr #FMVOL_SFTBIT
mov r4, r4, asr #FMVOL_SFTBIT
ldr r12, [r11, #T_CALC1024]
subs lr, lr, r12
addle r12, lr, r12
mla r8, r12, r3, r8
mla r9, r12, r4, r9
bgt mksmp_lp
ldr r0, [r11, #T_FMVOL]
mov r8, r8, asr #FMDIV_BITS
mov r9, r9, asr #FMDIV_BITS
mul r8, r0, r8
mul r9, r0, r9
ldr r0, [r1]
add r0, r0, r8, asr #(OPM_OUTSB + FMDIV_BITS + 1 + 6 - FMVOL_SFTBIT - 8);
str r0, [r1], #4
ldr r0, [r1]
add r0, r0, r9, asr #(OPM_OUTSB + FMDIV_BITS + 1 + 6 - FMVOL_SFTBIT - 8);
str r0, [r1], #4
subs r2, r2, #1
bne getpcm_lp
str r3, [r10, #G_OUTDL]
str r4, [r10, #G_OUTDR]
str lr, [r10, #G_CALCREMAIN]
strb r5, [r10, #G_PLAYING]
ldmia sp!, {r4 - r11, pc}
dcd_opngen dcd opngen
dcd_opnch dcd opnch
dcd_opncfg dcd opncfg + T_ORG
slot1update ldrb r3, [r6, #S1_ENV_MODE]
sub r3, r3, #1
cmp r3, #EM_ATTACK
addcc pc, pc, r3, lsl #2
b s1u_off ; EM_OFF
b s1u_rel ; EM_RELEASE
b s1u_dc2 ; EM_DECAY2
b s1u_dc1 ; EM_DECAY1
s1u_att strb r3, [r6, #S1_ENV_MODE]
ldr r3, [r6, #S1_DECAYLEVEL]
str r3, [r6, #S1_ENV_END]
ldr r3, [r6, #S1_ENVINCDECAY1]
str r3, [r6, #S1_ENV_INC]
mov r3, #EC_DECAY
b s1calcenv
s1u_dc1 strb r3, [r6, #S1_ENV_MODE]
mov r3, #EC_OFF
str r3, [r6, #S1_ENV_END]
ldr r3, [r6, #S1_ENVINCDECAY2]
str r3, [r6, #S1_ENV_INC]
ldr r3, [r6, #S1_DECAYLEVEL]
b s1calcenv
s1u_rel strb r3, [r6, #S1_ENV_MODE]
s1u_dc2 add r3, r12, #1
str r3, [r6, #S1_ENV_END]
mov r3, #0
str r3, [r6, #S1_ENV_INC]
ldrb r12, [r6, #C_PLAYING]
and r12, r12, #0xfe
strb r12, [r6, #C_PLAYING]
s1u_off mov r3, #EC_OFF
b s1calcenv
slot2update ldrb r3, [r6, #S2_ENV_MODE]
sub r3, r3, #1
cmp r3, #EM_ATTACK
addcc pc, pc, r3, lsl #2
b s2u_off ; EM_OFF
b s2u_rel ; EM_RELEASE
b s2u_dc2 ; EM_DECAY2
b s2u_dc1 ; EM_DECAY1
s2u_att strb r3, [r6, #S2_ENV_MODE]
ldr r3, [r6, #S2_DECAYLEVEL]
str r3, [r6, #S2_ENV_END]
ldr r3, [r6, #S2_ENVINCDECAY1]
str r3, [r6, #S2_ENV_INC]
mov r3, #EC_DECAY
b s2calcenv
s2u_dc1 strb r3, [r6, #S2_ENV_MODE]
mov r3, #EC_OFF
str r3, [r6, #S2_ENV_END]
ldr r3, [r6, #S2_ENVINCDECAY2]
str r3, [r6, #S2_ENV_INC]
ldr r3, [r6, #S2_DECAYLEVEL]
b s2calcenv
s2u_rel strb r3, [r6, #S2_ENV_MODE]
s2u_dc2 add r3, r12, #1
str r3, [r6, #S2_ENV_END]
mov r3, #0
str r3, [r6, #S2_ENV_INC]
ldrb r12, [r6, #C_PLAYING]
and r12, r12, #0xfd
strb r12, [r6, #C_PLAYING]
s2u_off mov r3, #EC_OFF
b s2calcenv
slot3update ldrb r3, [r6, #S3_ENV_MODE]
sub r3, r3, #1
cmp r3, #EM_ATTACK
addcc pc, pc, r3, lsl #2
b s3u_off ; EM_OFF
b s3u_rel ; EM_RELEASE
b s3u_dc2 ; EM_DECAY2
b s3u_dc1 ; EM_DECAY1
s3u_att strb r3, [r6, #S3_ENV_MODE]
ldr r3, [r6, #S3_DECAYLEVEL]
str r3, [r6, #S3_ENV_END]
ldr r3, [r6, #S3_ENVINCDECAY1]
str r3, [r6, #S3_ENV_INC]
mov r3, #EC_DECAY
b s3calcenv
s3u_dc1 strb r3, [r6, #S3_ENV_MODE]
mov r3, #EC_OFF
str r3, [r6, #S3_ENV_END]
ldr r3, [r6, #S3_ENVINCDECAY2]
str r3, [r6, #S3_ENV_INC]
ldr r3, [r6, #S3_DECAYLEVEL]
b s3calcenv
s3u_rel strb r3, [r6, #S3_ENV_MODE]
s3u_dc2 add r3, r12, #1
str r3, [r6, #S3_ENV_END]
mov r3, #0
str r3, [r6, #S3_ENV_INC]
ldrb r12, [r6, #C_PLAYING]
and r12, r12, #0xfb
strb r12, [r6, #C_PLAYING]
s3u_off mov r3, #EC_OFF
b s3calcenv
slot4update ldrb r3, [r6, #S4_ENV_MODE]
sub r3, r3, #1
cmp r3, #EM_ATTACK
addcc pc, pc, r3, lsl #2
b s4u_off ; EM_OFF
b s4u_rel ; EM_RELEASE
b s4u_dc2 ; EM_DECAY2
b s4u_dc1 ; EM_DECAY1
s4u_att strb r3, [r6, #S4_ENV_MODE]
ldr r3, [r6, #S4_DECAYLEVEL]
str r3, [r6, #S4_ENV_END]
ldr r3, [r6, #S4_ENVINCDECAY1]
str r3, [r6, #S4_ENV_INC]
mov r3, #EC_DECAY
b s4calcenv
s4u_dc1 strb r3, [r6, #S4_ENV_MODE]
mov r3, #EC_OFF
str r3, [r6, #S4_ENV_END]
ldr r3, [r6, #S4_ENVINCDECAY2]
str r3, [r6, #S4_ENV_INC]
ldr r3, [r6, #S4_DECAYLEVEL]
b s4calcenv
s4u_rel strb r3, [r6, #S4_ENV_MODE]
s4u_dc2 add r3, r12, #1
str r3, [r6, #S4_ENV_END]
mov r3, #0
str r3, [r6, #S4_ENV_INC]
ldrb r12, [r6, #C_PLAYING]
and r12, r12, #0xf7
strb r12, [r6, #C_PLAYING]
s4u_off mov r3, #EC_OFF
b s4calcenv
END
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