int
vax_float_literal(rtx c)
{
enum machine_mode mode;
REAL_VALUE_TYPE r, s;
int i;
if (GET_CODE (c) != CONST_DOUBLE)
return 0;
mode = GET_MODE (c);
if (c == const_tiny_rtx[(int) mode][0]
|| c == const_tiny_rtx[(int) mode][1]
|| c == const_tiny_rtx[(int) mode][2])
return 1;
REAL_VALUE_FROM_CONST_DOUBLE (r, c);
for (i = 0; i < 7; i++)
{
int x = 1 << i;
bool ok;
REAL_VALUE_FROM_INT (s, x, 0, mode);
if (REAL_VALUES_EQUAL (r, s))
return 1;
ok = exact_real_inverse (mode, &s);
gcc_assert (ok);
if (REAL_VALUES_EQUAL (r, s))
return 1;
}
return 0;
}
/*
* Return a new REAL_CST node whose type is TYPE
* and whose value is the integer value of the
* INTEGER_CST node I.
*/
REAL_VALUE_TYPE
real_value_from_int_cst (tree i)
{
REAL_VALUE_TYPE d;
#ifdef REAL_ARITHMETIC
REAL_VALUE_FROM_INT (d, TREE_INT_CST_LOW (i), TREE_INT_CST_HIGH (i));
#else /* not REAL_ARITHMETIC */
#define MASK ((unsigned)1 << (HOST_BITS_PER_INT - 1))
if (TREE_INT_CST_HIGH (i) < 0)
{
d = (double) (~ TREE_INT_CST_HIGH (i));
d *= ((double) (1 << (HOST_BITS_PER_INT / 2)) *
(double) (1 << (HOST_BITS_PER_INT / 2)));
/*
* The following four lines are equivalent
* to converting ~ TREE_INT_CST_LOW (i) from
* unsigned to double, but that is broken in
* some compilers.
*/
if (((~ TREE_INT_CST_LOW (i)) & MASK) != 0)
d += ((double) MASK +
(double) ((~ MASK) & ~ TREE_INT_CST_LOW (i)));
else
d += (double) (unsigned) (~ TREE_INT_CST_LOW (i));
d = (- d - 1.0);
}
else
{
d = (double) TREE_INT_CST_HIGH (i);
d *= ((double) (1 << (HOST_BITS_PER_INT / 2)) *
(double) (1 << (HOST_BITS_PER_INT / 2)));
if ((TREE_INT_CST_LOW (i) & MASK) != 0)
d += ((double) MASK +
(double) ((~ MASK) & TREE_INT_CST_LOW (i)));
else
d += (double) (unsigned) TREE_INT_CST_LOW (i);
}
#undef MASK
#endif /* not REAL_ARITHMETIC */
return (d);
} /* end real_value_from_int_cst */
static bool
ortho_init (void)
{
tree n;
input_location = BUILTINS_LOCATION;
/* Create a global binding. */
push_binding ();
build_common_tree_nodes (0);
size_type_node = type_for_size (GET_MODE_BITSIZE (Pmode), 1);
set_sizetype (size_type_node);
build_common_tree_nodes_2 (0);
n = build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("int"), integer_type_node);
push_decl (n);
n = build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("char"), char_type_node);
push_decl (n);
/* Create alloca builtin. */
{
tree args_type = tree_cons (NULL_TREE, size_type_node, void_list_node);
tree func_type = build_function_type (ptr_type_node, args_type);
implicit_built_in_decls[BUILT_IN_ALLOCA] = builtin_function
("__builtin_alloca", func_type,
BUILT_IN_ALLOCA, BUILT_IN_NORMAL, NULL, NULL_TREE);
stack_alloc_function_ptr = build1
(ADDR_EXPR,
build_pointer_type (func_type),
implicit_built_in_decls[BUILT_IN_ALLOCA]);
}
{
tree ptr_ftype = build_function_type (ptr_type_node, NULL_TREE);
implicit_built_in_decls[BUILT_IN_STACK_SAVE] = builtin_function
("__builtin_stack_save", ptr_ftype,
BUILT_IN_STACK_SAVE, BUILT_IN_NORMAL, NULL, NULL_TREE);
}
{
tree ftype_ptr;
ftype_ptr = build_function_type
(void_type_node,
tree_cons (NULL_TREE, ptr_type_node, NULL_TREE));
implicit_built_in_decls[BUILT_IN_STACK_RESTORE] = builtin_function
("__builtin_stack_restore", ftype_ptr,
BUILT_IN_STACK_RESTORE, BUILT_IN_NORMAL, NULL, NULL_TREE);
}
{
REAL_VALUE_TYPE v;
REAL_VALUE_FROM_INT (v, 1, 0, DFmode);
real_ldexp (&fp_const_p5, &v, -1);
REAL_VALUE_FROM_INT (v, -1, -1, DFmode);
real_ldexp (&fp_const_m_p5, &v, -1);
REAL_VALUE_FROM_INT (fp_const_zero, 0, 0, DFmode);
}
ortho_fe_init ();
return true;
}
static bool
ortho_init (void)
{
tree n;
input_location = BUILTINS_LOCATION;
/* Create a global binding. Don't use push_binding, as neither a BLOCK nor
a BIND_EXPR are needed. */
push_binding (GLOBAL_BINDING);
build_common_tree_nodes (0, 0);
n = build_decl (input_location,
TYPE_DECL, get_identifier ("int"), integer_type_node);
pushdecl (n);
n = build_decl (input_location,
TYPE_DECL, get_identifier ("char"), char_type_node);
pushdecl (n);
/* Create alloca builtin. */
{
tree args_type = tree_cons (NULL_TREE, size_type_node, void_list_node);
tree func_type = build_function_type (ptr_type_node, args_type);
define_builtin ("__builtin_alloca", func_type,
BUILT_IN_ALLOCA, NULL, 0);
stack_alloc_function_ptr = build1
(ADDR_EXPR,
build_pointer_type (func_type),
builtin_decl_implicit (BUILT_IN_ALLOCA));
}
{
tree ptr_ftype = build_function_type (ptr_type_node, NULL_TREE);
define_builtin ("__builtin_stack_save", ptr_ftype,
BUILT_IN_STACK_SAVE, NULL, 0);
}
{
tree ftype_ptr = build_function_type_list (void_type_node,
ptr_type_node, NULL_TREE);
define_builtin ("__builtin_stack_restore", ftype_ptr,
BUILT_IN_STACK_RESTORE, NULL, 0);
}
{
tree ftype_ptr = build_function_type_list (void_type_node, NULL_TREE);
define_builtin ("__builtin_trap", ftype_ptr,
BUILT_IN_TRAP, NULL, ECF_NOTHROW | ECF_LEAF);
TREE_THIS_VOLATILE (builtin_decl_explicit (BUILT_IN_TRAP)) = 1;
}
{
REAL_VALUE_TYPE v;
REAL_VALUE_FROM_INT (v, 1, 0, DFmode);
real_ldexp (&fp_const_p5, &v, -1);
REAL_VALUE_FROM_INT (v, -1, -1, DFmode);
real_ldexp (&fp_const_m_p5, &v, -1);
REAL_VALUE_FROM_INT (fp_const_zero, 0, 0, DFmode);
}
build_common_builtin_nodes ();
// FIXME: this MAY remove the need for creating the builtins above...
// Evaluate tree.c / build_common_builtin_nodes (); for each in turn.
return true;
}
