1 use rustc::mir::repr as mir;
3 use error::{EvalError, EvalResult};
6 #[derive(Clone, Copy, Debug, PartialEq)]
9 I8(i8), I16(i16), I32(i32), I64(i64),
10 U8(u8), U16(u16), U32(u32), U64(u64),
16 pub fn binary_op(bin_op: mir::BinOp, left: PrimVal, right: PrimVal) -> EvalResult<PrimVal> {
17 use rustc::mir::repr::BinOp::*;
20 macro_rules! int_binops {
21 ($v:ident, $l:ident, $r:ident) => ({
28 BitXor => $v($l ^ $r),
29 BitAnd => $v($l & $r),
32 // TODO(solson): Can have differently-typed RHS.
46 fn unrelated_ptr_ops(bin_op: mir::BinOp) -> EvalResult<PrimVal> {
47 use rustc::mir::repr::BinOp::*;
49 Eq => Ok(Bool(false)),
51 Lt | Le | Gt | Ge => Err(EvalError::InvalidPointerMath),
52 _ => unimplemented!(),
56 let val = match (left, right) {
57 (I8(l), I8(r)) => int_binops!(I8, l, r),
58 (I16(l), I16(r)) => int_binops!(I16, l, r),
59 (I32(l), I32(r)) => int_binops!(I32, l, r),
60 (I64(l), I64(r)) => int_binops!(I64, l, r),
61 (U8(l), U8(r)) => int_binops!(U8, l, r),
62 (U16(l), U16(r)) => int_binops!(U16, l, r),
63 (U32(l), U32(r)) => int_binops!(U32, l, r),
64 (U64(l), U64(r)) => int_binops!(U64, l, r),
66 (Bool(l), Bool(r)) => {
77 Add | Sub | Mul | Div | Rem | Shl | Shr =>
78 panic!("invalid binary operation on booleans: {:?}", bin_op),
82 (IntegerPtr(l), IntegerPtr(r)) => int_binops!(IntegerPtr, l, r),
84 (AbstractPtr(_), IntegerPtr(_)) | (IntegerPtr(_), AbstractPtr(_)) =>
85 return unrelated_ptr_ops(bin_op),
87 (AbstractPtr(l_ptr), AbstractPtr(r_ptr)) => {
88 if l_ptr.alloc_id != r_ptr.alloc_id {
89 return unrelated_ptr_ops(bin_op);
102 _ => unimplemented!(),
106 _ => unimplemented!(),
112 pub fn unary_op(un_op: mir::UnOp, val: PrimVal) -> PrimVal {
113 use rustc::mir::repr::UnOp::*;
114 use self::PrimVal::*;
116 (Not, Bool(b)) => Bool(!b),
117 (Not, I8(n)) => I8(!n),
118 (Neg, I8(n)) => I8(-n),
119 (Not, I16(n)) => I16(!n),
120 (Neg, I16(n)) => I16(-n),
121 (Not, I32(n)) => I32(!n),
122 (Neg, I32(n)) => I32(-n),
123 (Not, I64(n)) => I64(!n),
124 (Neg, I64(n)) => I64(-n),
125 (Not, U8(n)) => U8(!n),
126 (Not, U16(n)) => U16(!n),
127 (Not, U32(n)) => U32(!n),
128 (Not, U64(n)) => U64(!n),
129 _ => unimplemented!(),