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32x: improved lockstep mode, allows compatibility over 50%

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@797 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-09-30 15:42:32 +00:00
parent 2ea2cbfe8b
commit c987bb5c36
7 changed files with 55 additions and 36 deletions
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29
pico/32x/32x.c
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@ -127,27 +127,38 @@ static __inline void SekRunM68k(int cyc)
// ~1463.8, but due to cache misses and slow mem
// it's much lower than that
//#define SH2_LINE_CYCLES 735
#define CYCLES_M68K2SH2(x) ((x) * 9 / 4)
#define CYCLES_M68K2SH2(x) ((x) * 6 / 4)
#define PICO_32X
#define RUN_SH2S_SIMPLE(m68k_cycles) \
#define CPUS_RUN_SIMPLE(m68k_cycles,s68k_cycles) \
SekRunM68k(m68k_cycles); \
if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
sh2_execute(&msh2, CYCLES_M68K2SH2(m68k_cycles)); \
if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
sh2_execute(&ssh2, CYCLES_M68K2SH2(m68k_cycles))
#define STEP 66
#define RUN_SH2S_LOCKSTEP(m68k_cycles) \
#define STEP_68K 24
#define CPUS_RUN_LOCKSTEP(m68k_cycles,s68k_cycles) \
{ \
int i; \
for (i = 0; i < CYCLES_M68K2SH2(m68k_cycles); i+= STEP) { \
sh2_execute(&msh2, STEP); \
sh2_execute(&ssh2, STEP); \
for (i = 0; i <= (m68k_cycles) - STEP_68K; i += STEP_68K) { \
SekRunM68k(STEP_68K); \
if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
sh2_execute(&msh2, CYCLES_M68K2SH2(STEP_68K)); \
if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
sh2_execute(&ssh2, CYCLES_M68K2SH2(STEP_68K)); \
} \
/* last step */ \
i = (m68k_cycles) - i; \
SekRunM68k(i); \
if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
sh2_execute(&msh2, CYCLES_M68K2SH2(i)); \
if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
sh2_execute(&ssh2, CYCLES_M68K2SH2(i)); \
}
#define RUN_SH2S RUN_SH2S_SIMPLE
//#define RUN_SH2S RUN_SH2S_LOCKSTEP
//#define CPUS_RUN CPUS_RUN_SIMPLE
#define CPUS_RUN CPUS_RUN_LOCKSTEP
#include "../pico_cmn.c"