func (f *Function) BinOpLoadXY(instr *ssa.BinOp) (asm string, x *register, y *register, err *Error) {
if isPointer(instr.Type()) {
panic("ptr")
}
if ident := f.Ident(instr); ident == nil {
return "", nil, nil, ErrorMsg2(fmt.Sprintf("Cannot alloc value: %v", instr))
}
if ident := f.Ident(instr.X); ident == nil {
return "", nil, nil, ErrorMsg2(fmt.Sprintf("Cannot alloc value: %v", instr.X))
}
if ident := f.Ident(instr.Y); ident == nil {
return "", nil, nil, ErrorMsg2(fmt.Sprintf("Cannot alloc value: %v", instr.Y))
}
var a string
asm = "// BEGIN BinOpLoadXY\n"
if isPointer(instr.X.Type()) {
panic("ptr")
}
a, x, err = f.LoadValue(instr, instr.X, 0, f.sizeof(instr.X))
x.inUse = true
if err != nil {
return "", nil, nil, err
} else {
asm += a
}
if isPointer(f.Ident(instr.Y).typ) {
panic("ptr")
}
a, y, err = f.LoadValue(instr, instr.Y, 0, f.sizeof(instr.Y))
y.inUse = true
if err != nil {
return "", nil, nil, err
} else {
asm += a
}
asm += "// END BinOpLoadXY\n"
return asm, x, y, nil
}
func (f *Function) BinOp(instr *ssa.BinOp) (string, *Error) {
ctx := context{f, instr}
ident := f.Ident(instr)
if ident == nil {
return ErrorMsg(fmt.Sprintf("Cannot alloc value: %v", instr))
}
var regX, regY, regVal *register
size := f.sizeof(instr)
xIsSigned := signed(instr.X.Type())
var a string
// comparison op results are size 1 byte, but that's not supported
if size == 1 {
a, regVal = f.allocIdentReg(instr, ident, 8*size)
} else {
a, regVal = f.allocIdentReg(instr, ident, size)
}
asm := a
asmload, regX, regY, err := f.BinOpLoadXY(instr)
asm += asmload
if err != nil {
return asm, err
}
size = f.sizeof(instr.X)
switch instr.Op {
default:
ice(fmt.Sprintf("unknown op (%v)", instr.Op))
case token.ADD, token.SUB, token.MUL, token.QUO, token.REM:
optypes := GetOpDataType(instr.Type())
asm += ArithOp(ctx, optypes, instr.Op, regX, regY, regVal)
case token.AND, token.OR, token.XOR, token.SHL, token.SHR, token.AND_NOT:
asm += BitwiseOp(ctx, instr.Op, xIsSigned, regX, regY, regVal, size)
case token.EQL, token.NEQ, token.LEQ, token.GEQ, token.LSS, token.GTR:
if size != f.sizeof(instr.Y) {
ice("comparing two different size values")
}
optypes := GetOpDataType(instr.X.Type())
asm += CmpOp(ctx, optypes, instr.Op, regX, regY, regVal)
}
f.freeReg(regX)
f.freeReg(regY)
addr, ok := f.identifiers[instr.Name()]
if !ok {
ice(fmt.Sprintf("unknown name (%v), instr (%v)\n", instr.Name(), instr))
}
a1, err := f.StoreValue(instr, addr, regVal)
if err != nil {
return asm, err
} else {
asm += a1
}
f.freeReg(regVal)
asm = fmt.Sprintf("// BEGIN ssa.BinOp, %v = %v\n", instr.Name(), instr) + asm
asm += fmt.Sprintf("// END ssa.BinOp, %v = %v\n", instr.Name(), instr)
return asm, nil
}