diff options
Diffstat (limited to 'gcc/tree.def')
| -rw-r--r-- | gcc/tree.def | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree.def b/gcc/tree.def index 3e077cc..19a5029 100644 --- a/gcc/tree.def +++ b/gcc/tree.def @@ -691,7 +691,13 @@ DEFTREECODE (ABS_EXPR, "abs_expr", tcc_unary, 1) The second operand is the number of bits to shift by; it need not be the same type as the first operand and result. Note that the result is undefined if the second operand is larger - than or equal to the first operand's type size. */ + than or equal to the first operand's type size. + + The first operand of a shift can have either an integer or a + (non-integer) fixed-point type. We follow the ISO/IEC TR 18037:2004 + semantics for the latter. + + Rotates are defined for integer types only. */ DEFTREECODE (LSHIFT_EXPR, "lshift_expr", tcc_binary, 2) DEFTREECODE (RSHIFT_EXPR, "rshift_expr", tcc_binary, 2) DEFTREECODE (LROTATE_EXPR, "lrotate_expr", tcc_binary, 2) |