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32x, optimize poll detection

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kub 2021-06-15 22:34:46 +02:00
parent 8ee5bef7e8
commit cbd148906d
1 changed files with 5 additions and 5 deletions
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10
pico/32x/memory.c
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@ -119,7 +119,7 @@ void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
// reading 2 consecutive 16bit values is probably a 32bit access. detect this // reading 2 consecutive 16bit values is probably a 32bit access. detect this
// by checking address (max 2 bytes away) and cycles (max 2 cycles later). // by checking address (max 2 bytes away) and cycles (max 2 cycles later).
// no polling if more than 20 cycles have passed since last detect call. // no polling if more than 20 cycles have passed since last detect call.
if (a - sh2->poll_addr <= 2 && CYCLES_GE(20, cycles_diff)) { if (a - sh2->poll_addr <= 2 && CYCLES_GE(10, cycles_diff)) {
if (CYCLES_GT(cycles_diff, 2) && ++sh2->poll_cnt >= maxcnt) { if (CYCLES_GT(cycles_diff, 2) && ++sh2->poll_cnt >= maxcnt) {
if (!(sh2->state & flags)) if (!(sh2->state & flags))
elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", elprintf_sh2(sh2, EL_32X, "state: %02x->%02x",
@ -736,7 +736,7 @@ static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0]
| Pico32x.sh2irq_mask[sh2->is_slave]; | Pico32x.sh2irq_mask[sh2->is_slave];
case 0x04/2: // H count (often as comm too) case 0x04/2: // H count (often as comm too)
p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 9); p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 5);
cycles = sh2_cycles_done_m68k(sh2); cycles = sh2_cycles_done_m68k(sh2);
sh2s_sync_on_read(sh2, cycles); sh2s_sync_on_read(sh2, cycles);
return sh2_poll_read(a, Pico32x.sh2_regs[4 / 2], cycles, sh2); return sh2_poll_read(a, Pico32x.sh2_regs[4 / 2], cycles, sh2);
@ -770,7 +770,7 @@ static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
case 0x2a/2: case 0x2a/2:
case 0x2c/2: case 0x2c/2:
case 0x2e/2: case 0x2e/2:
p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 9); p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 5);
cycles = sh2_cycles_done_m68k(sh2); cycles = sh2_cycles_done_m68k(sh2);
sh2s_sync_on_read(sh2, cycles); sh2s_sync_on_read(sh2, cycles);
return sh2_poll_read(a, r[a / 2], cycles, sh2); return sh2_poll_read(a, r[a / 2], cycles, sh2);
@ -1457,7 +1457,7 @@ static u32 REGPARM(2) sh2_read8_cs0(u32 a, SH2 *sh2)
if ((a & 0x3fff0) == 0x4100) { if ((a & 0x3fff0) == 0x4100) {
d = p32x_vdp_read16(a); d = p32x_vdp_read16(a);
p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 9); p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 7);
goto out_16to8; goto out_16to8;
} }
@ -1520,7 +1520,7 @@ static u32 REGPARM(2) sh2_read16_cs0(u32 a, SH2 *sh2)
if ((a & 0x3fff0) == 0x4100) { if ((a & 0x3fff0) == 0x4100) {
d = p32x_vdp_read16(a); d = p32x_vdp_read16(a);
p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 9); p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 7);
goto out; goto out;
} }