// OpStoreStackReg must not allocate registers.
func (mach X86) OpStoreStackReg(code gen.OpCoder, t types.T, offset int32, reg regs.R) {
switch t.Category() {
case types.Int:
Mov.opToStack(code, t, reg, offset)
case types.Float:
MovsSSE.opToStack(code, t, reg, offset)
default:
panic(t)
}
}
func (i movImmInsn) op(code gen.OpCoder, t types.T, reg regs.R, value int64) {
switch {
case value >= -0x80000000 && value < 0x80000000:
i.imm32.opImm(code, t, reg, int32(value))
case t.Size() == types.Size64 && value >= 0 && value < 0x100000000:
i.imm.op(code, types.I32, reg, imm{uint32(value)})
default:
i.imm.op(code, t, reg, imm{value})
}
}
func (p *floatSizePrefix) writeTo(code gen.OpCoder, t types.T, ro, index, rmOrBase byte) {
switch t.Size() {
case types.Size32:
code.Write(p.size32)
case types.Size64:
code.Write(p.size64)
default:
panic(t)
}
writeRexTo(code, 0, ro, index, rmOrBase)
}
// OpGetGlobal must not update CPU's condition flags.
func (mach X86) OpGetGlobal(code gen.RegCoder, t types.T, offset int32) values.Operand {
reg, ok := code.TryAllocReg(t)
if !ok {
reg = regResult
}
if t.Category() == types.Int {
Mov.opFromIndirect(code, t, reg, 0, NoIndex, regMemoryBase, offset)
} else {
MovSSE.opFromIndirect(code, t, reg, 0, NoIndex, regMemoryBase, offset)
}
return values.TempRegOperand(t, reg, true)
}
func writeRexSizeTo(code gen.OpCoder, t types.T, ro, index, rmOrBase byte) {
var rex byte
switch t.Size() {
case types.Size32:
case types.Size64:
rex |= rexW
default:
panic(t)
}
writeRexTo(code, rex, ro, index, rmOrBase)
}
// OpMoveReg must not allocate registers.
func (mach X86) OpMoveReg(code gen.Coder, t types.T, targetReg, sourceReg regs.R) {
if targetReg == sourceReg {
panic("target and source registers are the same")
}
switch t.Category() {
case types.Int:
Mov.opFromReg(code, t, targetReg, sourceReg)
case types.Float:
MovsSSE.opFromReg(code, t, targetReg, sourceReg)
default:
panic(t)
}
}
func TypeRegCategory(t types.T) RegCategory {
return RegCategory(t.Category() - 1)
}