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Really make translation through constant jumps functional. This can be

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disabled with the new prefs item "jitinline". Some rapid Speedometer 4
benchmarks showed only a 4% improvement.
This commit is contained in:
gbeauche 2005-06-06 19:22:56 +00:00
parent 83b228cf30
commit c0cc43a87b
3 changed files with 45 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
BasiliskII/src/prefs_items.cpp
View File

@ -63,6 +63,7 @@ prefs_desc common_prefs_items[] = {
{"jitdebug", TYPE_BOOLEAN, false, "enable JIT debugger (requires mon builtin)"},
{"jitcachesize", TYPE_INT32, false, "translation cache size in KB"},
{"jitlazyflush", TYPE_BOOLEAN, false, "enable lazy invalidation of translation cache"},
{"jitinline", TYPE_BOOLEAN, false, "enable translation through constant jumps"},
{"jitblacklist", TYPE_STRING, false, "blacklist opcodes from translation"},
{"keyboardtype", TYPE_INT32, false, "hardware keyboard type"},
{NULL, TYPE_END, false, NULL} // End of list
@ -97,6 +98,7 @@ void AddPrefsDefaults(void)
PrefsAddBool("jitdebug", false);
PrefsAddInt32("jitcachesize", 8192);
PrefsAddInt32("jitlazyflush", true);
PrefsAddBool("jitinline", true);
#else
PrefsAddBool("jit", false);
#endif

20
BasiliskII/src/uae_cpu/compiler/compemu_support.cpp
View File

@ -149,6 +149,11 @@ static bool JITDebug = false; // Enable runtime disassemblers through mon?
#else
const bool JITDebug = false; // Don't use JIT debug mode at all
#endif
#if USE_INLINING
static bool follow_const_jumps = true; // Flag: translation through constant jumps
#else
const bool follow_const_jumps = false;
#endif
const uae_u32 MIN_CACHE_SIZE = 1024; // Minimal translation cache size (1 MB)
static uae_u32 cache_size = 0; // Size of total cache allocated for compiled blocks
@ -5016,7 +5021,10 @@ void compiler_init(void)
write_log("<JIT compiler> : register aliasing : %s\n", str_on_off(1));
write_log("<JIT compiler> : FP register aliasing : %s\n", str_on_off(USE_F_ALIAS));
write_log("<JIT compiler> : lazy constant offsetting : %s\n", str_on_off(USE_OFFSET));
write_log("<JIT compiler> : block inlining : %s\n", str_on_off(USE_INLINING));
#if USE_INLINING
follow_const_jumps = PrefsFindBool("jitinline");
#endif
write_log("<JIT compiler> : translate through constant jumps : %s\n", str_on_off(follow_const_jumps));
write_log("<JIT compiler> : separate blockinfo allocation : %s\n", str_on_off(USE_SEPARATE_BIA));
// Build compiler tables
@ -6249,7 +6257,7 @@ void build_comp(void)
for (i = 0; tbl[i].opcode < 65536; i++) {
int cflow = table68k[tbl[i].opcode].cflow;
if (USE_INLINING && ((cflow & fl_const_jump) != 0))
if (follow_const_jumps && (tbl[i].specific & 16))
cflow = fl_const_jump;
else
cflow &= ~fl_const_jump;
@ -6301,6 +6309,10 @@ void build_comp(void)
}
prop[cft_map(opcode)].set_flags = table68k[opcode].flagdead;
prop[cft_map(opcode)].use_flags = table68k[opcode].flaglive;
/* Unconditional jumps don't evaluate condition codes, so they
* don't actually use any flags themselves */
if (prop[cft_map(opcode)].cflow & fl_const_jump)
prop[cft_map(opcode)].use_flags = 0;
}
for (i = 0; nfctbl[i].handler != NULL; i++) {
if (nfctbl[i].specific)
@ -6652,8 +6664,7 @@ static void compile_block(cpu_history* pc_hist, int blocklen)
#if USE_CHECKSUM_INFO
trace_in_rom = trace_in_rom && isinrom((uintptr)currpcp);
#if USE_INLINING
if (is_const_jump(op)) {
if (follow_const_jumps && is_const_jump(op)) {
checksum_info *csi = alloc_checksum_info();
csi->start_p = (uae_u8 *)min_pcp;
csi->length = max_pcp - min_pcp + LONGEST_68K_INST;
@ -6661,7 +6672,6 @@ static void compile_block(cpu_history* pc_hist, int blocklen)
bi->csi = csi;
max_pcp = (uintptr)currpcp;
}
#endif
min_pcp = (uintptr)currpcp;
#else
if ((uintptr)currpcp<min_pcp)

79
BasiliskII/src/uae_cpu/readcpu.cpp
View File

@ -754,6 +754,34 @@ static void build_insn (int insn)
}
#endif
// Fix flags used information for Scc, Bcc, TRAPcc, DBcc instructions
if ( table68k[opc].mnemo == i_Scc
|| table68k[opc].mnemo == i_Bcc
|| table68k[opc].mnemo == i_DBcc
|| table68k[opc].mnemo == i_TRAPcc
) {
switch (table68k[opc].cc) {
// CC mask: XNZVC
// 8421
case 0: flags_used = 0x00; break; /* T */
case 1: flags_used = 0x00; break; /* F */
case 2: flags_used = 0x05; break; /* HI */
case 3: flags_used = 0x05; break; /* LS */
case 4: flags_used = 0x01; break; /* CC */
case 5: flags_used = 0x01; break; /* CS */
case 6: flags_used = 0x04; break; /* NE */
case 7: flags_used = 0x04; break; /* EQ */
case 8: flags_used = 0x02; break; /* VC */
case 9: flags_used = 0x02; break; /* VS */
case 10:flags_used = 0x08; break; /* PL */
case 11:flags_used = 0x08; break; /* MI */
case 12:flags_used = 0x0A; break; /* GE */
case 13:flags_used = 0x0A; break; /* LT */
case 14:flags_used = 0x0E; break; /* GT */
case 15:flags_used = 0x0E; break; /* LE */
}
}
#if 1
/* gb-- flagdead and flaglive would not have correct information */
table68k[opc].flagdead = flags_set;
@ -781,57 +809,6 @@ void read_table68k (void)
for (i = 0; i < n_defs68k; i++) {
build_insn (i);
}
/* Extra fixes in table68k for control flow information and flag usage */
for (i = 0; i < 65536; i++) {
instrmnem mnemo = (instrmnem)(table68k[i].mnemo);
#define IS_CONST_JUMP(opc) \
( ((table68k[opc].mnemo == i_Bcc) && (table68k[opc].cc < 2)) \
|| (table68k[opc].mnemo == i_BSR) \
)
// Precise const jumps as such. The JIT compiler will take
// care to actually enable that optimization or not
if (IS_CONST_JUMP(i))
table68k[i].cflow |= fl_const_jump;
// Fix flags used information for Scc, Bcc, TRAPcc, DBcc instructions
int flags_used = table68k[i].flaglive;
if ( (mnemo == i_Scc)
|| (mnemo == i_Bcc)
|| (mnemo == i_DBcc)
|| (mnemo == i_TRAPcc)
) {
switch (table68k[i].cc) {
// CC mask: XNZVC
// 8421
case 0: flags_used = 0x00; break; /* T */
case 1: flags_used = 0x00; break; /* F */
case 2: flags_used = 0x05; break; /* HI */
case 3: flags_used = 0x05; break; /* LS */
case 4: flags_used = 0x01; break; /* CC */
case 5: flags_used = 0x01; break; /* CS */
case 6: flags_used = 0x04; break; /* NE */
case 7: flags_used = 0x04; break; /* EQ */
case 8: flags_used = 0x02; break; /* VC */
case 9: flags_used = 0x02; break; /* VS */
case 10:flags_used = 0x08; break; /* PL */
case 11:flags_used = 0x08; break; /* MI */
case 12:flags_used = 0x0A; break; /* GE */
case 13:flags_used = 0x0A; break; /* LT */
case 14:flags_used = 0x0E; break; /* GT */
case 15:flags_used = 0x0E; break; /* LE */
}
}
/* Unconditional jumps don't evaluate condition codes, so they
don't actually use any flags themselves */
if (IS_CONST_JUMP(i))
flags_used = 0;
table68k[i].flaglive = flags_used;
}
}
static int mismatch;