private static void zeroAuto(ref gc.Progs pp, ref gc.Node n)
{
// Note: this code must not clobber any registers.
var sym = n.Sym.Linksym();
var size = n.Type.Size();
var p = pp.Prog(arm.AMOVW);
p.From.Type = obj.TYPE_CONST;
p.From.Offset = 0L;
p.To.Type = obj.TYPE_REG;
p.To.Reg = arm.REGTMP;
{
var i = int64(0L);
while (i < size)
{
p = pp.Prog(arm.AMOVW);
p.From.Type = obj.TYPE_REG;
p.From.Reg = arm.REGTMP;
p.To.Type = obj.TYPE_MEM;
p.To.Name = obj.NAME_AUTO;
p.To.Reg = arm.REGSP;
p.To.Offset = n.Xoffset + i;
p.To.Sym = sym;
i += 4L;
}
}
}
private static void zeroAuto(ref gc.Progs pp, ref gc.Node n)
{
// Note: this code must not clobber any registers.
var op = x86.AMOVQ;
if (gc.Widthptr == 4L)
{
op = x86.AMOVL;
}
var sym = n.Sym.Linksym();
var size = n.Type.Size();
{
var i = int64(0L);
while (i < size)
{
var p = pp.Prog(op);
p.From.Type = obj.TYPE_CONST;
p.From.Offset = 0L;
p.To.Type = obj.TYPE_MEM;
p.To.Name = obj.NAME_AUTO;
p.To.Reg = x86.REG_SP;
p.To.Offset = n.Xoffset + i;
p.To.Sym = sym;
i += int64(gc.Widthptr);
}
}
}
private static void ginsnop(ref gc.Progs pp)
{
var p = pp.Prog(arm.AAND);
p.From.Type = obj.TYPE_REG;
p.From.Reg = arm.REG_R0;
p.To.Type = obj.TYPE_REG;
p.To.Reg = arm.REG_R0;
p.Scond = arm.C_SCOND_EQ;
}
private static void ginsnop(ref gc.Progs pp)
{
// This is actually not the x86 NOP anymore,
// but at the point where it gets used, AX is dead
// so it's okay if we lose the high bits.
var p = pp.Prog(x86.AXCHGL);
p.From.Type = obj.TYPE_REG;
p.From.Reg = x86.REG_AX;
p.To.Type = obj.TYPE_REG;
p.To.Reg = x86.REG_AX;
}
private static void ginsnop(ref gc.Progs pp)
{
var p = pp.Prog(arm64.AHINT);
p.From.Type = obj.TYPE_CONST;
}