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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
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@ -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;
}