/* Utility routines for data type conversion for GCC.
Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1997, 1998,
- 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* These routines are somewhat language-independent utility function
#include "toplev.h"
#include "langhooks.h"
#include "real.h"
-/* Convert EXPR to some pointer or reference type TYPE.
+#include "fixed-value.h"
+/* Convert EXPR to some pointer or reference type TYPE.
EXPR must be pointer, reference, integer, enumeral, or literal zero;
in other cases error is called. */
tree
convert_to_pointer (tree type, tree expr)
{
+ if (TREE_TYPE (expr) == type)
+ return expr;
+
+ /* Propagate overflow to the NULL pointer. */
if (integer_zerop (expr))
- return build_int_cst (type, 0);
+ return force_fit_type_double (type, 0, 0, 0, TREE_OVERFLOW (expr));
switch (TREE_CODE (TREE_TYPE (expr)))
{
case POINTER_TYPE:
case REFERENCE_TYPE:
- return build1 (NOP_EXPR, type, expr);
+ return fold_build1 (NOP_EXPR, type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
if (TYPE_PRECISION (TREE_TYPE (expr)) != POINTER_SIZE)
expr = fold_build1 (NOP_EXPR,
lang_hooks.types.type_for_size (POINTER_SIZE, 0),
/* Convert EXPR to some floating-point type TYPE.
- EXPR must be float, integer, or enumeral;
+ EXPR must be float, fixed-point, integer, or enumeral;
in other cases error is called. */
tree
CASE_MATHFN (Y1)
#undef CASE_MATHFN
{
- tree arg0 = strip_float_extensions (TREE_VALUE (TREE_OPERAND (expr, 1)));
+ tree arg0 = strip_float_extensions (CALL_EXPR_ARG (expr, 0));
tree newtype = type;
/* We have (outertype)sqrt((innertype)x). Choose the wider mode from
&& (TYPE_MODE (newtype) == TYPE_MODE (double_type_node)
|| TYPE_MODE (newtype) == TYPE_MODE (float_type_node)))
{
- tree arglist;
tree fn = mathfn_built_in (newtype, fcode);
if (fn)
{
- arglist = build_tree_list (NULL_TREE, fold (convert_to_real (newtype, arg0)));
- expr = build_function_call_expr (fn, arglist);
+ tree arg = fold (convert_to_real (newtype, arg0));
+ expr = build_call_expr (fn, 1, arg);
if (newtype == type)
return expr;
}
if (fn)
{
- tree arg
- = strip_float_extensions (TREE_VALUE (TREE_OPERAND (expr, 1)));
+ tree arg = strip_float_extensions (CALL_EXPR_ARG (expr, 0));
/* Make sure (type)arg0 is an extension, otherwise we could end up
changing (float)floor(double d) into floorf((float)d), which is
incorrect because (float)d uses round-to-nearest and can round
up to the next integer. */
if (TYPE_PRECISION (type) >= TYPE_PRECISION (TREE_TYPE (arg)))
- return
- build_function_call_expr (fn,
- build_tree_list (NULL_TREE,
- fold (convert_to_real (type, arg))));
+ return build_call_expr (fn, 1, fold (convert_to_real (type, arg)));
}
}
if (itype != type && FLOAT_TYPE_P (type))
switch (TREE_CODE (expr))
{
- /* Convert (float)-x into -(float)x. This is always safe. */
+ /* Convert (float)-x into -(float)x. This is safe for
+ round-to-nearest rounding mode. */
case ABS_EXPR:
case NEGATE_EXPR:
- if (TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (expr)))
+ if (!flag_rounding_math
+ && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (expr)))
return build1 (TREE_CODE (expr), type,
fold (convert_to_real (type,
TREE_OPERAND (expr, 0))));
&& FLOAT_TYPE_P (TREE_TYPE (arg1)))
{
tree newtype = type;
+
+ if (TYPE_MODE (TREE_TYPE (arg0)) == SDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == SDmode)
+ newtype = dfloat32_type_node;
+ if (TYPE_MODE (TREE_TYPE (arg0)) == DDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == DDmode)
+ newtype = dfloat64_type_node;
+ if (TYPE_MODE (TREE_TYPE (arg0)) == TDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == TDmode)
+ newtype = dfloat128_type_node;
+ if (newtype == dfloat32_type_node
+ || newtype == dfloat64_type_node
+ || newtype == dfloat128_type_node)
+ {
+ expr = build2 (TREE_CODE (expr), newtype,
+ fold (convert_to_real (newtype, arg0)),
+ fold (convert_to_real (newtype, arg1)));
+ if (newtype == type)
+ return expr;
+ break;
+ }
+
if (TYPE_PRECISION (TREE_TYPE (arg0)) > TYPE_PRECISION (newtype))
newtype = TREE_TYPE (arg0);
if (TYPE_PRECISION (TREE_TYPE (arg1)) > TYPE_PRECISION (newtype))
switch (TREE_CODE (TREE_TYPE (expr)))
{
case REAL_TYPE:
- return build1 (flag_float_store ? CONVERT_EXPR : NOP_EXPR,
- type, expr);
+ /* Ignore the conversion if we don't need to store intermediate
+ results and neither type is a decimal float. */
+ return build1 ((flag_float_store
+ || DECIMAL_FLOAT_TYPE_P (type)
+ || DECIMAL_FLOAT_TYPE_P (itype))
+ ? CONVERT_EXPR : NOP_EXPR, type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
return build1 (FLOAT_EXPR, type, expr);
+ case FIXED_POINT_TYPE:
+ return build1 (FIXED_CONVERT_EXPR, type, expr);
+
case COMPLEX_TYPE:
return convert (type,
fold_build1 (REALPART_EXPR,
/* Convert EXPR to some integer (or enum) type TYPE.
- EXPR must be pointer, integer, discrete (enum, char, or bool), float, or
- vector; in other cases error is called.
+ EXPR must be pointer, integer, discrete (enum, char, or bool), float,
+ fixed-point or vector; in other cases error is called.
The result of this is always supposed to be a newly created tree node
not in use in any existing structure. */
switch (fcode)
{
- case BUILT_IN_CEIL: case BUILT_IN_CEILF: case BUILT_IN_CEILL:
+ CASE_FLT_FN (BUILT_IN_CEIL):
/* Only convert in ISO C99 mode. */
if (!TARGET_C99_FUNCTIONS)
break;
- if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
- fn = mathfn_built_in (s_intype, BUILT_IN_LLCEIL);
- else
+ if (outprec < TYPE_PRECISION (long_integer_type_node)
+ || (outprec == TYPE_PRECISION (long_integer_type_node)
+ && !TYPE_UNSIGNED (type)))
fn = mathfn_built_in (s_intype, BUILT_IN_LCEIL);
+ else if (outprec == TYPE_PRECISION (long_long_integer_type_node)
+ && !TYPE_UNSIGNED (type))
+ fn = mathfn_built_in (s_intype, BUILT_IN_LLCEIL);
break;
- case BUILT_IN_FLOOR: case BUILT_IN_FLOORF: case BUILT_IN_FLOORL:
+ CASE_FLT_FN (BUILT_IN_FLOOR):
/* Only convert in ISO C99 mode. */
if (!TARGET_C99_FUNCTIONS)
break;
- if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
- fn = mathfn_built_in (s_intype, BUILT_IN_LLFLOOR);
- else
+ if (outprec < TYPE_PRECISION (long_integer_type_node)
+ || (outprec == TYPE_PRECISION (long_integer_type_node)
+ && !TYPE_UNSIGNED (type)))
fn = mathfn_built_in (s_intype, BUILT_IN_LFLOOR);
+ else if (outprec == TYPE_PRECISION (long_long_integer_type_node)
+ && !TYPE_UNSIGNED (type))
+ fn = mathfn_built_in (s_intype, BUILT_IN_LLFLOOR);
break;
- case BUILT_IN_ROUND: case BUILT_IN_ROUNDF: case BUILT_IN_ROUNDL:
- if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
- fn = mathfn_built_in (s_intype, BUILT_IN_LLROUND);
- else
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ if (outprec < TYPE_PRECISION (long_integer_type_node)
+ || (outprec == TYPE_PRECISION (long_integer_type_node)
+ && !TYPE_UNSIGNED (type)))
fn = mathfn_built_in (s_intype, BUILT_IN_LROUND);
+ else if (outprec == TYPE_PRECISION (long_long_integer_type_node)
+ && !TYPE_UNSIGNED (type))
+ fn = mathfn_built_in (s_intype, BUILT_IN_LLROUND);
break;
- case BUILT_IN_RINT: case BUILT_IN_RINTF: case BUILT_IN_RINTL:
- /* Only convert rint* if we can ignore math exceptions. */
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ /* Only convert nearbyint* if we can ignore math exceptions. */
if (flag_trapping_math)
break;
/* ... Fall through ... */
- case BUILT_IN_NEARBYINT: case BUILT_IN_NEARBYINTF: case BUILT_IN_NEARBYINTL:
- if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
- fn = mathfn_built_in (s_intype, BUILT_IN_LLRINT);
- else
- fn = mathfn_built_in (s_intype, BUILT_IN_LRINT);
+ CASE_FLT_FN (BUILT_IN_RINT):
+ if (outprec < TYPE_PRECISION (long_integer_type_node)
+ || (outprec == TYPE_PRECISION (long_integer_type_node)
+ && !TYPE_UNSIGNED (type)))
+ fn = mathfn_built_in (s_intype, BUILT_IN_LRINT);
+ else if (outprec == TYPE_PRECISION (long_long_integer_type_node)
+ && !TYPE_UNSIGNED (type))
+ fn = mathfn_built_in (s_intype, BUILT_IN_LLRINT);
break;
- case BUILT_IN_TRUNC: case BUILT_IN_TRUNCF: case BUILT_IN_TRUNCL:
- {
- tree arglist = TREE_OPERAND (s_expr, 1);
- return convert_to_integer (type, TREE_VALUE (arglist));
- }
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ return convert_to_integer (type, CALL_EXPR_ARG (s_expr, 0));
default:
break;
if (fn)
{
- tree arglist = TREE_OPERAND (s_expr, 1);
- tree newexpr = build_function_call_expr (fn, arglist);
+ tree newexpr = build_call_expr (fn, 1, CALL_EXPR_ARG (s_expr, 0));
return convert_to_integer (type, newexpr);
}
}
expr = fold_build1 (CONVERT_EXPR,
lang_hooks.types.type_for_size (POINTER_SIZE, 0),
expr);
- return fold_build1 (NOP_EXPR, type, expr);
+ return fold_convert (type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
/* If this is a logical operation, which just returns 0 or 1, we can
change the type of the expression. */
else if (outprec >= inprec)
{
enum tree_code code;
+ tree tem;
/* If the precision of the EXPR's type is K bits and the
destination mode has more bits, and the sign is changing,
else
code = NOP_EXPR;
- return fold_build1 (code, type, expr);
+ tem = fold_unary (code, type, expr);
+ if (tem)
+ return tem;
+
+ tem = build1 (code, type, expr);
+ TREE_NO_WARNING (tem) = 1;
+ return tem;
}
/* If TYPE is an enumeral type or a type with a precision less
/* We can pass truncation down through right shifting
when the shift count is a nonpositive constant. */
if (TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST
- && tree_int_cst_lt (TREE_OPERAND (expr, 1),
- convert (TREE_TYPE (TREE_OPERAND (expr, 1)),
- integer_one_node)))
+ && tree_int_cst_sgn (TREE_OPERAND (expr, 1)) <= 0)
goto trunc1;
break;
but (int) a << 32 is undefined and would get a
warning. */
- tree t = convert_to_integer (type, integer_zero_node);
+ tree t = build_int_cst (type, 0);
/* If the original expression had side-effects, we must
preserve it. */
|| ex_form == RSHIFT_EXPR
|| ex_form == LROTATE_EXPR
|| ex_form == RROTATE_EXPR))
- || ex_form == LSHIFT_EXPR)
- typex = lang_hooks.types.unsigned_type (typex);
+ || ex_form == LSHIFT_EXPR
+ /* If we have !flag_wrapv, and either ARG0 or
+ ARG1 is of a signed type, we have to do
+ PLUS_EXPR or MINUS_EXPR in an unsigned
+ type. Otherwise, we would introduce
+ signed-overflow undefinedness. */
+ || ((!TYPE_OVERFLOW_WRAPS (TREE_TYPE (arg0))
+ || !TYPE_OVERFLOW_WRAPS (TREE_TYPE (arg1)))
+ && (ex_form == PLUS_EXPR
+ || ex_form == MINUS_EXPR)))
+ typex = unsigned_type_for (typex);
else
- typex = lang_hooks.types.signed_type (typex);
+ typex = signed_type_for (typex);
return convert (type,
fold_build2 (ex_form, typex,
convert (typex, arg0),
/* Don't do unsigned arithmetic where signed was wanted,
or vice versa. */
if (TYPE_UNSIGNED (TREE_TYPE (expr)))
- typex = lang_hooks.types.unsigned_type (type);
+ typex = unsigned_type_for (type);
else
- typex = lang_hooks.types.signed_type (type);
+ typex = signed_type_for (type);
return convert (type,
fold_build1 (ex_form, typex,
convert (typex,
case REAL_TYPE:
return build1 (FIX_TRUNC_EXPR, type, expr);
+ case FIXED_POINT_TYPE:
+ return build1 (FIXED_CONVERT_EXPR, type, expr);
+
case COMPLEX_TYPE:
return convert (type,
fold_build1 (REALPART_EXPR,
switch (TREE_CODE (TREE_TYPE (expr)))
{
case REAL_TYPE:
+ case FIXED_POINT_TYPE:
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
return build2 (COMPLEX_EXPR, type, convert (subtype, expr),
convert (subtype, integer_zero_node));
return error_mark_node;
}
}
+
+/* Convert EXPR to some fixed-point type TYPE.
+
+ EXPR must be fixed-point, float, integer, or enumeral;
+ in other cases error is called. */
+
+tree
+convert_to_fixed (tree type, tree expr)
+{
+ if (integer_zerop (expr))
+ {
+ tree fixed_zero_node = build_fixed (type, FCONST0 (TYPE_MODE (type)));
+ return fixed_zero_node;
+ }
+ else if (integer_onep (expr) && ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type)))
+ {
+ tree fixed_one_node = build_fixed (type, FCONST1 (TYPE_MODE (type)));
+ return fixed_one_node;
+ }
+
+ switch (TREE_CODE (TREE_TYPE (expr)))
+ {
+ case FIXED_POINT_TYPE:
+ case INTEGER_TYPE:
+ case ENUMERAL_TYPE:
+ case BOOLEAN_TYPE:
+ case REAL_TYPE:
+ return build1 (FIXED_CONVERT_EXPR, type, expr);
+
+ case COMPLEX_TYPE:
+ return convert (type,
+ fold_build1 (REALPART_EXPR,
+ TREE_TYPE (TREE_TYPE (expr)), expr));
+
+ default:
+ error ("aggregate value used where a fixed-point was expected");
+ return error_mark_node;
+ }
+}
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