public override void ExitSum2(ssuplParser.Sum2Context context)
{
//sum : sum MINUS term #sum2
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"pop rbx", //value from term
"pop rax", //value from sum
"sub rax,rbx",
"push rax"
);
}
public override void ExitSum2(ssuplParser.Sum2Context context)
{
//sum : sum MINUS term #sum2
if (type(context.sum()) != type(context.term()))
{
throw new Exception("Type mismatch");
}
typeAttr.Put(context, type(context.sum()));
switch (type(context.sum()))
{
case VarType.INT:
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"pop rbx", //value from term
"pop rax", //value from sum
"sub rax,rbx",
"push rax"
);
break;
case VarType.DOUBLE:
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"movq xmm1, [rsp]", //pop value...
"add rsp,8", //...from term
"movq xmm0, [rsp]", //pop value...
"add rsp,8", //...from sum
"subsd xmm0,xmm1", //xmm0 <- xmm0-xmm1
"sub rsp,8", //do the push...
"movq [rsp], xmm0" //...of the result
);
break;
case VarType.VEC4:
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"movq xmm4, [rsp]", //term.x
"movq xmm0, [rsp+32]", //sum.x
"subsd xmm0,xmm4", //result.x
"movq xmm4, [rsp+8]", //term.y
"movq xmm1, [rsp+40]", //sum.y
"subsd xmm1,xmm4", //result.y
"movq xmm4, [rsp+16]", //term.z
"movq xmm2, [rsp+48]", //sum.z
"subsd xmm2,xmm4", //result.z
"movq xmm4, [rsp+24]", //term.w
"movq xmm3, [rsp+56]", //sum.w
"subsd xmm3,xmm4", //result.w
"add rsp,32", //pop 64 bytes, push 32
"movq [rsp], xmm0", //result.x
"movq [rsp+8], xmm1", //result.y
"movq [rsp+16], xmm2", //result.z
"movq [rsp+24], xmm3" //result.w
);
break;
}
}
public override void ExitSum2(ssuplParser.Sum2Context context)
{
//sum : sum MINUS term #sum2
if (type(context.sum()) != type(context.term()))
{
throw new Exception("Type mismatch");
}
typeAttr.Put(context, type(context.sum()));
switch (type(context.sum()))
{
case VarType.INT:
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"pop rbx", //value from term
"pop rax", //value from sum
"sub rax,rbx",
"push rax"
);
break;
case VarType.DOUBLE:
code.Put(context,
code.Get(context.sum()),
code.Get(context.term()),
"movq xmm1, [rsp]", //pop value...
"add rsp,8", //...from term
"movq xmm0, [rsp]", //pop value...
"add rsp,8", //...from sum
"subsd xmm0,xmm1", //xmm0 <- xmm0-xmm1
"sub rsp,8", //do the push...
"movq [rsp], xmm0" //...of the result
);
break;
}
}