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some more optimizations

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@179 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-07-01 14:59:15 +00:00
parent b637c56aad
commit 3a5e6cf847
6 changed files with 66 additions and 52 deletions
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14
cpu/Cyclone/Ea.cpp
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@ -284,27 +284,29 @@ int EaRead(int a,int v,int ea,int size,int mask,int top,int sign_extend)
{
char text[32]="";
int shift=0;
shift=32-(8<<size);
DisaPc=2; DisaGetEa(text,ea,size); // Get text version of the effective address
if (ea<0x10)
{
int lsl=0,low=0,i;
int lsl=0,low=0,nsarm=size&3,i;
if (size>=2||(size==0&&(top||!sign_extend))) {
if(mask)
for (i=mask|0x8000; (i&1)==0; i>>=1) low++; // Find out how high up the EA mask is
lsl=2-low; // Having a lsl #2 here saves one opcode
}
if (top) nsarm=3;
ot(";@ EaRead : Read register[r%d] into r%d:\n",a,v);
if (lsl>0) ot(" ldr%s r%d,[r7,r%d,lsl #%i]\n",Narm[size&3],v,a,lsl);
else if (lsl<0) ot(" ldr%s r%d,[r7,r%d,lsr #%i]\n",Narm[size&3],v,a,-lsl);
else ot(" ldr%s r%d,[r7,r%d]\n",Sarm[size&3],v,a);
if (lsl>0) ot(" ldr%s r%d,[r7,r%d,lsl #%i]\n",Narm[nsarm],v,a,lsl);
else if (lsl<0) ot(" ldr%s r%d,[r7,r%d,lsr #%i]\n",Narm[nsarm],v,a,-lsl);
else ot(" ldr%s r%d,[r7,r%d]\n",Sarm[nsarm],v,a);
if (top && shift) ot(" mov r%d,r%d,asl #%d\n",v,v,shift);
if (top&&shift) ot(" mov r%d,r%d,asl #%d\n",v,v,shift);
ot("\n"); return 0;
}