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ym2612: temporarily limit table lookup ranges (nw)

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R. Belmont 2013-05-11 16:41:23 +00:00
parent 89652f00ef
commit c0dd40be90
1 changed files with 4 additions and 4 deletions
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8
src/emu/sound/fm2612.c
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@ -1447,7 +1447,7 @@ INLINE void update_phase_lfo_slot(FM_OPN *OPN, FM_SLOT *SLOT, INT32 pms, UINT32
UINT32 fn = block_fnum & 0xfff;
/* recalculate keyscale code */
int kc = (blk<<2) | opn_fktable[fn >> 7];
int kc = (blk<<2) | opn_fktable[(fn >> 7) & 0xf];
/* recalculate (frequency) phase increment counter */
int fc = (OPN->fn_table[fn]>>(7-blk)) + SLOT->DT[kc];
@ -1479,7 +1479,7 @@ INLINE void update_phase_lfo_channel(FM_OPN *OPN, FM_CH *CH)
UINT32 fn = block_fnum & 0xfff;
/* recalculate keyscale code */
int kc = (blk<<2) | opn_fktable[fn >> 7];
int kc = (blk<<2) | opn_fktable[(fn >> 7) & 0xf];
/* recalculate (frequency) phase increment counter */
int fc = (OPN->fn_table[fn]>>(7-blk));
@ -1915,7 +1915,7 @@ static void OPNWriteReg(FM_OPN *OPN, int r, int v)
UINT32 fn = (((UINT32)( (OPN->ST.fn_h)&7))<<8) + v;
UINT8 blk = OPN->ST.fn_h>>3;
/* keyscale code */
CH->kcode = (blk<<2) | opn_fktable[fn >> 7];
CH->kcode = (blk<<2) | opn_fktable[(fn >> 7) & 0xf];
/* phase increment counter */
CH->fc = OPN->fn_table[fn*2]>>(7-blk);
@ -1934,7 +1934,7 @@ static void OPNWriteReg(FM_OPN *OPN, int r, int v)
UINT32 fn = (((UINT32)(OPN->SL3.fn_h&7))<<8) + v;
UINT8 blk = OPN->SL3.fn_h>>3;
/* keyscale code */
OPN->SL3.kcode[c]= (blk<<2) | opn_fktable[fn >> 7];
OPN->SL3.kcode[c]= (blk<<2) | opn_fktable[(fn >> 7) & 0xf];
/* phase increment counter */
OPN->SL3.fc[c] = OPN->fn_table[fn*2]>>(7-blk);
OPN->SL3.block_fnum[c] = (blk<<11) | fn;