//a=a-1
void ALU::dec(Register a)
{
if(!a.getValue())
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(a.getValue()-1);
}
//a=a*b
void ALU::mul(Register a, Register b)
{
if(a.getValue()>UINT_MAX/b.getValue())
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(a.getValue()*b.getValue());
}
//a=b-a
void ALU::rsub(Register a, Register b)
{
if(b.getValue()<a.getValue())
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(b.getValue()-a.getValue());
}
//a=a-b
void ALU::sub(Register a, Register b)
{
if(a.getValue()<b.getValue())
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(a.getValue()-b.getValue());
}
//a=a+1
void ALU::inc(Register a)
{
if(a.getValue()==UINT_MAX)
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(a.getValue()+1);
}
//a=a+b
void ALU::add(Register a,Register b)
{
if(a.getValue()>UINT_MAX-b.getValue())
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(a.getValue()+b.getValue());
}
//a=b-a+c-1
void ALU::rsubc(Register a, Register b)
{
unsigned val = b.getValue()-a.getValue()+m_flags[0]-1;
if(b.getValue()<a.getValue()-m_flags[0]+1)
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(val);
}
//a=a+b+c
void ALU::addc(Register a,Register b)
{
unsigned val = a.getValue()+b.getValue()+m_flags[0];
if(a.getValue()>UINT_MAX-b.getValue()-m_flags[0])
{
m_flags[0] = 1;
}
else
{
m_flags[0] = 0;
}
a.setValue(val);
}
main(int argc, char **argv)
{
if (argc < 3)
{
printf("09TO10 version 1.0\n\r"
"by Robert Schmidt of Ztiff Zox Softwear 1993\n\r"
"\n\r"
"Converts TWEAK version 0.9 files to TWEAK version 1.0 files.\n\r"
"\n\r"
"Syntax: 09TO10 <oldfile> <newfile>\n\r"
);
return 0;
}
vgaRegTable rtab;
char *fname = argv[1];
FILE *f;
int r;
// Open file in selected mode.
if (!(f=fopen(fname,"rb")))
{
perror(fname);
return 0;
}
// Read file:
for (r=0; r<registers; r++)
if (fread(&(rtab[r]),1,1,f) == 0)
{
perror(fname);
return 0;
}
fclose(f);
ofstream out(argv[2], ios::trunc|ios::binary|ios::out);
Register reg;
for (r=0; r<registers; r++)
{
reg.setPort(table[r].port);
reg.setIndex(table[r].index);
reg.setValue(rtab[r]);
out << reg;
}
return 0;
}
void ALU::random(Register a)
{
a.setValue(rand());
}
//a=1
void ALU::one(Register a)
{
a.setValue(1);
}
