kvisc/vm/in/logic.c

149 lines
2.4 KiB
C

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include <in/instrs.h>
IMPL_COND(not);
IMPL_COND(and);
IMPL_COND(or);
IMPL_COND(xor);
IMPL_COND(shl);
IMPL_COND(shr);
#define CMP(v1, v2) \
if (v1 == v2) { \
flg |= ZF; \
flg &= ~CF; \
} \
else if (v1 < v2) { \
flg &= ~ZF; \
flg |= CF; \
} \
else { \
flg &= ~ZF; \
flg &= ~CF; \
}
//
// Comparison instructions
//
IMPL_START_2(test)
{
ulong v = v1 & v2;
CMP(v, 0);
}
IMPL_END;
IMPL_START_2(testb)
{
ulong v = v1 & v2 & 0x00000000000000FF;
CMP(v, 0);
}
IMPL_END;
IMPL_START_2(testw)
{
ulong v = v1 & v2 & 0x000000000000FFFF;
CMP(v, 0);
}
IMPL_END;
IMPL_START_2(testl)
{
ulong v = v1 & v2 & 0x00000000FFFFFFFF;
CMP(v, 0);
}
IMPL_END;
IMPL_START_2(testt)
{
ulong v = v1 & v2 & 0x0000FFFFFFFFFFFF;
CMP(v, 0);
}
IMPL_END;
IMPL_START_2(cmp)
{
CMP(v1, v2);
}
IMPL_END;
IMPL_START_2(cmpb)
{
v1 &= 0x00000000000000FF;
v2 &= 0x00000000000000FF;
CMP(v1, v2);
}
IMPL_END;
IMPL_START_2(cmpw)
{
v1 &= 0x000000000000FFFF;
v2 &= 0x000000000000FFFF;
CMP(v1, v2);
}
IMPL_END;
IMPL_START_2(cmpl)
{
v1 &= 0x00000000FFFFFFFF;
v2 &= 0x00000000FFFFFFFF;
CMP(v1, v2);
}
IMPL_END;
IMPL_START_2(cmpt)
{
v1 &= 0x0000FFFFFFFFFFFF;
v2 &= 0x0000FFFFFFFFFFFF;
CMP(v1, v2);
}
IMPL_END;
//
// Logical instructions
//
IMPL_START_2(and)
{
v1 &= v2;
}
IMPL_OUT;
IMPL_START_2(or)
{
v1 |= v2;
}
IMPL_OUT;
IMPL_START_2(xor)
{
v1 ^= v2;
}
IMPL_OUT;
IMPL_START_2(shl)
{
v1 <<= v2;
}
IMPL_OUT;
IMPL_START_2(shr)
{
v1 >>= v2;
}
IMPL_OUT;
IMPL_START_1(not)
{
v1 = ~v1;
}
IMPL_OUT;