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Last irixxxx's optimizations

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root
2021-06-29 11:16:28 +02:00
parent 5110c84bee
commit e008a4cf59
8 changed files with 44 additions and 24 deletions
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16
cpu/sh2/compiler.c
View File

@@ -68,7 +68,6 @@
// 200 - compare trace
// 400 - block entry backtrace on exit
// 800 - state dump on exit
// {
#ifndef DRC_DEBUG
#define DRC_DEBUG 0//x847
#endif
@@ -218,7 +217,7 @@ static void REGPARM(3) *sh2_drc_log_entry(void *block, SH2 *sh2, u32 sr)
if (block != NULL) {
#if defined PDB
dbg(8, "= %csh2 enter %08x %p, c=%d", sh2->is_slave?'s':'m',
sh2->pc, block, (signed int)sr >> 12);
sh2->pc, block, ((signed int)sr >> 12)+1);
pdb_step(sh2, sh2->pc);
#elif (DRC_DEBUG & 8)
if (lastpc != sh2->pc) {
@@ -2612,10 +2611,14 @@ static uptr split_address(uptr la, uptr mask, s32 *offs)
uptr sign = (mask>>1) + 1; // sign bit in offset
*offs = (la & mask) | (la & sign ? ~mask : 0); // offset part, sign extended
la = (la & ~mask) + ((la & sign) << 1); // base part, corrected for offs sign
if (~mask && la == ~mask && *offs > 0) { // special case la=-1&~mask && offs>0
*offs -= mask+1;
la = 0;
#ifdef __arm__
// arm32 offset has an add/sub flag and an unsigned 8 bit value, which only
// allows values of [-255...255]. the value -256 thus can't be used.
if (*offs + sign == 0) {
la += sign;
*offs += sign;
}
#endif
return la;
}
@@ -4414,6 +4417,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
EMITH_HINT_COND(DCOND_EQ);
emith_subf_r_r_imm(tmp, tmp2, 1);
emith_set_t_cond(sr, DCOND_EQ);
emith_or_r_imm(sr, SH2_NO_POLLING);
goto end_op;
}
goto default_;
@@ -5013,7 +5017,7 @@ end_op:
// can't resolve branch locally, make a block exit
bl = dr_prepare_ext_branch(block->entryp, target_pc, sh2->is_slave, tcache_id);
if (cond != -1) {
#if 1
#ifndef __arm__
if (bl && blx_target_count < ARRAY_SIZE(blx_targets)) {
// conditional jumps get a blx stub for the far jump
bl->type = BL_JCCBLX;

1
cpu/sh2/mame/sh2.c
View File

@@ -800,6 +800,7 @@ INLINE void DT(sh2_state *sh2, UINT32 n)
sh2->sr |= T;
else
sh2->sr &= ~T;
sh2->no_polling = SH2_NO_POLLING;
#if BUSY_LOOP_HACKS
{
UINT32 next_opcode = (UINT32)(UINT16)RW( sh2, sh2->ppc & AM );

6
cpu/sh2/mame/sh2pico.c
View File

@@ -24,9 +24,10 @@ typedef u8 UINT8;
static __inline unsigned int name(SH2 *sh2, unsigned int a) \
{ \
unsigned int ret; \
sh2->sr |= sh2->icount << 12; \
sh2->sr |= (sh2->icount << 12) | (sh2->no_polling); \
ret = cname(a, sh2); \
sh2->icount = (signed int)sh2->sr >> 12; \
sh2->no_polling = (sh2->sr & SH2_NO_POLLING); \
sh2->sr &= 0x3f3; \
return ret; \
}
@@ -34,9 +35,10 @@ static __inline unsigned int name(SH2 *sh2, unsigned int a) \
#define MAKE_WRITEFUNC(name, cname) \
static __inline void name(SH2 *sh2, unsigned int a, unsigned int d) \
{ \
sh2->sr |= sh2->icount << 12; \
sh2->sr |= (sh2->icount << 12) | (sh2->no_polling); \
cname(a, d, sh2); \
sh2->icount = (signed int)sh2->sr >> 12; \
sh2->no_polling = (sh2->sr & SH2_NO_POLLING); \
sh2->sr &= 0x3f3; \
}

3
cpu/sh2/sh2.h
View File

@@ -56,6 +56,9 @@ typedef struct SH2_
uint32_t poll_addr;
int poll_cycles;
int poll_cnt;
// NB MUST be a bit unused in SH2 SR, see also cpu/sh2/compiler.c!
#define SH2_NO_POLLING (1 << 10) // poll detection control
int no_polling;
// DRC branch cache. size must be 2^n and <=128
int rts_cache_idx;