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Cyclone: group some often used handlers + minor optimization.

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Seems to help CD games with many cache misses.


git-svn-id: file:///home/notaz/opt/svn/PicoDrive@749 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-08-13 20:17:46 +00:00
parent 07ceafdb04
commit d4789c7cd6
3 changed files with 75 additions and 7 deletions
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66
cpu/Cyclone/Main.cpp
View file

@ -12,6 +12,68 @@ int Cycles; // Current cycles for opcode
int pc_dirty; // something changed PC during processing
int arm_op_count;
// opcodes often used by games
static const unsigned short hot_opcodes[] = {
0x6701, // beq $3
0x6601, // bne $3
0x51c8, // dbra Dn, $2
0x4a38, // tst.b $0.w
0xd040, // add.w Dn, Dn
0x4a79, // tst.w $0.l
0x0240, // andi.w #$0, D0
0x2038, // move.l $0.w, D0
0xb0b8, // cmp.l $0.w, D0
0x6001, // bra $3
0x30c0, // move.w D0, (A0)+
0x3028, // move.w ($0,A0), D0
0x0c40, // cmpi.w #$0, D0
0x0c79, // cmpi.w #$0, $0.l
0x4e75, // rts
0x4e71, // nop
0x3000, // move.w D0, D0
0x0839, // btst #$0, $0.l
0x7000, // moveq #$0, D0
0x3040, // movea.w D0, A0
0x0838, // btst #$0, $0.w
0x4a39, // tst.b $0.l
0x33d8, // move.w (A0)+, $0.l
0x6700, // beq $2
0xb038, // cmp.b $0.w, D0
0x3039, // move.w $0.l, D0
0x4840, // swap D0
0x6101, // bsr $3
0x6100, // bsr $2
0x5e40, // addq.w #7, D0
0x1039, // move.b $0.l, D0
0x20c0, // move.l D0, (A0)+
0x1018, // move.b (A0)+, D0
0x30d0, // move.w (A0), (A0)+
0x3080, // move.w D0, (A0)
0x3018, // move.w (A0)+, D0
0xc040, // and.w D0, D0
0x3180, // move.w D0, (A0,D0.w)
0x1198, // move.b (A0)+, (A0,D0.w)
0x6501, // bcs $3
0x6500, // bcs $2
0x6401, // bcc $3
0x6a01, // bpl $3
0x41f0, // lea (A0,D0.w), A0
0x4a28, // tst.b ($0,A0)
0x0828, // btst #$0, ($0,A0)
0x0640, // addi.w #$0, D0
0x10c0, // move.b D0, (A0)+
0x10d8, // move.b (A0)+, (A0)+
};
#define hot_opcode_count (int)(sizeof(hot_opcodes) / sizeof(hot_opcodes[0]))
static int is_op_hot(int op)
{
int i;
for (i = 0; i < hot_opcode_count; i++)
if (op == hot_opcodes[i])
return 1;
return 0;
}
void ot(const char *format, ...)
{
@ -957,10 +1019,14 @@ static void PrintOpcodes()
OpEnd();
for (op=0;op<hot_opcode_count;op++)
OpAny(hot_opcodes[op]);
for (op=0;op<0x10000;op++)
{
if ((op&0xfff)==0) { printf("%x",op>>12); fflush(stdout); } // Update progress
if (!is_op_hot(op))
OpAny(op);
}

2
cpu/Cyclone/OpBranch.cpp
View file

@ -500,7 +500,7 @@ int OpBranch(int op)
OpEnd(size?0x10:0);
// since all "DontBranch" code is same for every size, output only once
if (cc>=2&&(op&0xff00)==0x6200)
if (cc>=2&&(op&0xff00)==0x6700)
{
ot("BccDontBranch%i%s\n", 8<<size, ms?"":":");
if (size) ot(" add r4,r4,#%d\n",1<<size);

12
cpu/Cyclone/OpMove.cpp
View file

@ -121,16 +121,18 @@ int OpMove(int op)
OpStart(op,sea,tea); Cycles=4;
EaCalcRead(-1,1,sea,size,0x003f);
if (movea==0)
{
ot(" adds r1,r1,#0 ;@ Defines NZ, clears CV\n");
EaCalcRead(-1,0,sea,size,0x003f);
ot(" adds r1,r0,#0 ;@ Defines NZ, clears CV\n");
ot(" mrs r10,cpsr ;@ r10=NZCV flags\n");
ot("\n");
}
if (movea) size=2; // movea always expands to 32-bits
else
{
EaCalcRead(-1,1,sea,size,0x003f);
size=2; // movea always expands to 32-bits
}
eawrite_check_addrerr=1;
#if SPLIT_MOVEL_PD