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sh2, optimizations to innermost run loop

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This commit is contained in:
kub 2020-04-22 20:29:53 +02:00
parent 9a02334f3a
commit 2eb213314a
3 changed files with 21 additions and 18 deletions
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17
cpu/sh2/sh2.h
View file

@ -75,6 +75,7 @@ typedef struct SH2_
unsigned int cycles_timeslice;
struct SH2_ *other_sh2;
int (*run)(struct SH2_ *, int);
// we use 68k reference cycles for easier sync
unsigned int m68krcycles_done;
@ -82,7 +83,7 @@ typedef struct SH2_
unsigned int mult_sh2_to_m68k;
uint8_t data_array[0x1000]; // cache (can be used as RAM)
uint32_t peri_regs[0x200/4]; // periphereal regs
uint32_t peri_regs[0x200/4]; // peripheral regs
} SH2;
#define CYCLE_MULT_SHIFT 10
@ -103,17 +104,17 @@ void sh2_unpack(SH2 *sh2, const unsigned char *buff);
int sh2_execute_drc(SH2 *sh2c, int cycles);
int sh2_execute_interpreter(SH2 *sh2c, int cycles);
static __inline int sh2_execute(SH2 *sh2, int cycles, int use_drc)
static __inline void sh2_execute_prepare(SH2 *sh2, int use_drc)
{
sh2->run = use_drc ? sh2_execute_drc : sh2_execute_interpreter;
}
static __inline int sh2_execute(SH2 *sh2, int cycles)
{
int ret;
sh2->cycles_timeslice = cycles;
#ifdef DRC_SH2
if (use_drc)
ret = sh2_execute_drc(sh2, cycles);
else
#endif
ret = sh2_execute_interpreter(sh2, cycles);
ret = sh2->run(sh2, cycles);
return sh2->cycles_timeslice - ret;
}

13
pico/32x/32x.c
View file

@ -383,7 +383,7 @@ static void run_sh2(SH2 *sh2, unsigned int m68k_cycles)
elprintf_sh2(sh2, EL_32X, "+run %u %d @%08x",
sh2->m68krcycles_done, cycles, sh2->pc);
done = sh2_execute(sh2, cycles, PicoIn.opt & POPT_EN_DRC);
done = sh2_execute(sh2, cycles);
sh2->m68krcycles_done += C_SH2_TO_M68K(sh2, done);
sh2->state &= ~SH2_STATE_RUN;
@ -499,12 +499,12 @@ void sync_sh2s_normal(unsigned int m68k_target)
pprof_end(msh2);
now = next;
if (!(msh2.state & SH2_IDLE_STATES)) {
if (CYCLES_GT(now, msh2.m68krcycles_done))
if (CYCLES_GT(now, msh2.m68krcycles_done)) {
if (!(msh2.state & SH2_IDLE_STATES))
now = msh2.m68krcycles_done;
}
if (!(ssh2.state & SH2_IDLE_STATES)) {
if (CYCLES_GT(now, ssh2.m68krcycles_done))
if (CYCLES_GT(now, ssh2.m68krcycles_done)) {
if (!(ssh2.state & SH2_IDLE_STATES))
now = ssh2.m68krcycles_done;
}
if (CYCLES_GT(now, timer_cycles+STEP_N)) {
@ -571,6 +571,9 @@ void sync_sh2s_lockstep(unsigned int m68k_target)
void PicoFrame32x(void)
{
sh2_execute_prepare(&msh2, PicoIn.opt & POPT_EN_DRC);
sh2_execute_prepare(&ssh2, PicoIn.opt & POPT_EN_DRC);
Pico.m.scanline = 0;
Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank

9
pico/pico_int.h
View file

@ -235,11 +235,10 @@ extern SH2 sh2s[2];
# define sh2_pc(sh2) (sh2)->ppc
#else
# define sh2_end_run(sh2, after_) do { \
int left_ = (signed int)(sh2)->sr >> 12; \
if (left_ > (after_)) { \
(sh2)->cycles_timeslice -= left_ - (after_); \
(sh2)->sr &= 0xfff; \
(sh2)->sr |= (after_) << 12; \
int left_ = ((signed int)(sh2)->sr >> 12) - (after_); \
if (left_ > 0) { \
(sh2)->cycles_timeslice -= left_; \
(sh2)->sr -= (left_ << 12); \
} \
} while (0)
# define sh2_cycles_left(sh2) ((signed int)(sh2)->sr >> 12)