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- Turn on runtime detection of loop and jump alignment as Aranym people

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reported they got some improvement with it and larger loops. Small
  loops are an issue for now until unrolling is implemented for DBcc.
- Const jumps are identified in readcpu. I don't want to duplicate code
  uselessly. Rather, it's the JIT job to know whether we are doing block
  inlining and un-marking those instructions as end-of-block.
This commit is contained in:
gbeauche 2002-10-03 15:05:01 +00:00
parent a60c6da7c3
commit 8de7ad1091
2 changed files with 10 additions and 11 deletions
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16
BasiliskII/src/uae_cpu/compiler/compemu_support.cpp
View File

@ -103,7 +103,7 @@ static bool lazy_flush = true; // Flag: lazy translation cache invalidation
static bool avoid_fpu = true; // Flag: compile FPU instructions ? static bool avoid_fpu = true; // Flag: compile FPU instructions ?
static bool have_cmov = false; // target has CMOV instructions ? static bool have_cmov = false; // target has CMOV instructions ?
static bool have_rat_stall = true; // target has partial register stalls ? static bool have_rat_stall = true; // target has partial register stalls ?
static bool tune_alignment = false; // Tune code alignments for running CPU ? static bool tune_alignment = true; // Tune code alignments for running CPU ?
static int align_loops = 32; // Align the start of loops static int align_loops = 32; // Align the start of loops
static int align_jumps = 32; // Align the start of jumps static int align_jumps = 32; // Align the start of jumps
static int zero_fd = -1; static int zero_fd = -1;
@ -5699,17 +5699,13 @@ void build_comp(void)
prop[opcode].cflow = fl_trap; // ILLEGAL instructions do trap prop[opcode].cflow = fl_trap; // ILLEGAL instructions do trap
} }
#define IS_CONST_JUMP(opc) \
( ((table68k[opc].mnemo == i_Bcc) && (table68k[opc].cc < 2)) \
|| (table68k[opc].mnemo == i_BSR) \
)
for (i = 0; tbl[i].opcode < 65536; i++) { for (i = 0; tbl[i].opcode < 65536; i++) {
int cflow = table68k[tbl[i].opcode].cflow; int cflow = table68k[tbl[i].opcode].cflow;
if (USE_INLINING && IS_CONST_JUMP(tbl[i].opcode)) if (USE_INLINING && ((cflow & fl_const_jump) != 0))
prop[cft_map(tbl[i].opcode)].cflow = fl_const_jump; cflow = fl_const_jump;
else else
prop[cft_map(tbl[i].opcode)].cflow = cflow; cflow &= ~fl_const_jump;
prop[cft_map(tbl[i].opcode)].cflow = cflow;
int uses_fpu = tbl[i].specific & 32; int uses_fpu = tbl[i].specific & 32;
if (uses_fpu && avoid_fpu) if (uses_fpu && avoid_fpu)
@ -5718,8 +5714,6 @@ void build_comp(void)
compfunctbl[cft_map(tbl[i].opcode)] = tbl[i].handler; compfunctbl[cft_map(tbl[i].opcode)] = tbl[i].handler;
} }
#undef IS_CONST_JUMP
for (i = 0; nftbl[i].opcode < 65536; i++) { for (i = 0; nftbl[i].opcode < 65536; i++) {
int uses_fpu = tbl[i].specific & 32; int uses_fpu = tbl[i].specific & 32;
if (uses_fpu && avoid_fpu) if (uses_fpu && avoid_fpu)

5
BasiliskII/src/uae_cpu/readcpu.cpp
View File

@ -786,6 +786,11 @@ void read_table68k (void)
|| (table68k[opc].mnemo == i_BSR) \ || (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 // Fix flags used information for Scc, Bcc, TRAPcc, DBcc instructions
int flags_used = table68k[i].flaglive; int flags_used = table68k[i].flaglive;
if ( (mnemo == i_Scc) if ( (mnemo == i_Scc)