1 /* Machine mode definitions for GCC; included by rtl.h and tree.h.
2 Copyright (C) 1991-2018 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef HAVE_MACHINE_MODES
21 #define HAVE_MACHINE_MODES
23 typedef opt_mode<machine_mode> opt_machine_mode;
25 extern CONST_MODE_SIZE unsigned short mode_size[NUM_MACHINE_MODES];
26 extern const poly_uint16_pod mode_precision[NUM_MACHINE_MODES];
27 extern const unsigned char mode_inner[NUM_MACHINE_MODES];
28 extern const poly_uint16_pod mode_nunits[NUM_MACHINE_MODES];
29 extern CONST_MODE_UNIT_SIZE unsigned char mode_unit_size[NUM_MACHINE_MODES];
30 extern const unsigned short mode_unit_precision[NUM_MACHINE_MODES];
31 extern const unsigned char mode_wider[NUM_MACHINE_MODES];
32 extern const unsigned char mode_2xwider[NUM_MACHINE_MODES];
37 /* For use by the machmode support code only.
39 There are cases in which the machmode support code needs to forcibly
40 convert a machine_mode to a specific mode class T, and in which the
41 context guarantees that this is valid without the need for an assert.
42 This can be done using:
44 return typename mode_traits<T>::from_int (mode);
46 when returning a T and:
48 res = T (typename mode_traits<T>::from_int (mode));
50 when assigning to a value RES that must be assignment-compatible
51 with (but possibly not the same as) T. */
53 /* Allow direct conversion of enums to specific mode classes only
54 when USE_ENUM_MODES is defined. This is only intended for use
55 by gencondmd, so that it can tell more easily when .md conditions
57 typedef machine_mode from_int;
59 /* Here we use an enum type distinct from machine_mode but with the
60 same range as machine_mode. T should have a constructor that
61 accepts this enum type; it should not have a constructor that
64 We use this somewhat indirect approach to avoid too many constructor
65 calls when the compiler is built with -O0. For example, even in
66 unoptimized code, the return statement above would construct the
67 returned T directly from the numerical value of MODE. */
68 enum from_int { dummy = MAX_MACHINE_MODE };
73 struct mode_traits<machine_mode>
75 /* machine_mode itself needs no conversion. */
76 typedef machine_mode from_int;
79 /* Always treat machine modes as fixed-size while compiling code specific
80 to targets that have no variable-size modes. */
81 #if defined (IN_TARGET_CODE) && NUM_POLY_INT_COEFFS == 1
82 #define ONLY_FIXED_SIZE_MODES 1
84 #define ONLY_FIXED_SIZE_MODES 0
87 /* Get the name of mode MODE as a string. */
89 extern const char * const mode_name[NUM_MACHINE_MODES];
90 #define GET_MODE_NAME(MODE) mode_name[MODE]
94 #include "mode-classes.def"
95 #define DEF_MODE_CLASS(M) M
96 enum mode_class { MODE_CLASSES, MAX_MODE_CLASS };
100 /* Get the general kind of object that mode MODE represents
101 (integer, floating, complex, etc.) */
103 extern const unsigned char mode_class[NUM_MACHINE_MODES];
104 #define GET_MODE_CLASS(MODE) ((enum mode_class) mode_class[MODE])
106 /* Nonzero if MODE is an integral mode. */
107 #define INTEGRAL_MODE_P(MODE) \
108 (GET_MODE_CLASS (MODE) == MODE_INT \
109 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
110 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
111 || GET_MODE_CLASS (MODE) == MODE_VECTOR_INT)
113 /* Nonzero if MODE is a floating-point mode. */
114 #define FLOAT_MODE_P(MODE) \
115 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
116 || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT \
117 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT \
118 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
120 /* Nonzero if MODE is a complex mode. */
121 #define COMPLEX_MODE_P(MODE) \
122 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
123 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
125 /* Nonzero if MODE is a vector mode. */
126 #define VECTOR_MODE_P(MODE) \
127 (GET_MODE_CLASS (MODE) == MODE_VECTOR_INT \
128 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT \
129 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT \
130 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT \
131 || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM \
132 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM)
134 /* Nonzero if MODE is a scalar integral mode. */
135 #define SCALAR_INT_MODE_P(MODE) \
136 (GET_MODE_CLASS (MODE) == MODE_INT \
137 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT)
139 /* Nonzero if MODE is a scalar floating point mode. */
140 #define SCALAR_FLOAT_MODE_P(MODE) \
141 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
142 || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT)
144 /* Nonzero if MODE is a decimal floating point mode. */
145 #define DECIMAL_FLOAT_MODE_P(MODE) \
146 (GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT)
148 /* Nonzero if MODE is a scalar fract mode. */
149 #define SCALAR_FRACT_MODE_P(MODE) \
150 (GET_MODE_CLASS (MODE) == MODE_FRACT)
152 /* Nonzero if MODE is a scalar ufract mode. */
153 #define SCALAR_UFRACT_MODE_P(MODE) \
154 (GET_MODE_CLASS (MODE) == MODE_UFRACT)
156 /* Nonzero if MODE is a scalar fract or ufract mode. */
157 #define ALL_SCALAR_FRACT_MODE_P(MODE) \
158 (SCALAR_FRACT_MODE_P (MODE) || SCALAR_UFRACT_MODE_P (MODE))
160 /* Nonzero if MODE is a scalar accum mode. */
161 #define SCALAR_ACCUM_MODE_P(MODE) \
162 (GET_MODE_CLASS (MODE) == MODE_ACCUM)
164 /* Nonzero if MODE is a scalar uaccum mode. */
165 #define SCALAR_UACCUM_MODE_P(MODE) \
166 (GET_MODE_CLASS (MODE) == MODE_UACCUM)
168 /* Nonzero if MODE is a scalar accum or uaccum mode. */
169 #define ALL_SCALAR_ACCUM_MODE_P(MODE) \
170 (SCALAR_ACCUM_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE))
172 /* Nonzero if MODE is a scalar fract or accum mode. */
173 #define SIGNED_SCALAR_FIXED_POINT_MODE_P(MODE) \
174 (SCALAR_FRACT_MODE_P (MODE) || SCALAR_ACCUM_MODE_P (MODE))
176 /* Nonzero if MODE is a scalar ufract or uaccum mode. */
177 #define UNSIGNED_SCALAR_FIXED_POINT_MODE_P(MODE) \
178 (SCALAR_UFRACT_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE))
180 /* Nonzero if MODE is a scalar fract, ufract, accum or uaccum mode. */
181 #define ALL_SCALAR_FIXED_POINT_MODE_P(MODE) \
182 (SIGNED_SCALAR_FIXED_POINT_MODE_P (MODE) \
183 || UNSIGNED_SCALAR_FIXED_POINT_MODE_P (MODE))
185 /* Nonzero if MODE is a scalar/vector fract mode. */
186 #define FRACT_MODE_P(MODE) \
187 (GET_MODE_CLASS (MODE) == MODE_FRACT \
188 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT)
190 /* Nonzero if MODE is a scalar/vector ufract mode. */
191 #define UFRACT_MODE_P(MODE) \
192 (GET_MODE_CLASS (MODE) == MODE_UFRACT \
193 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT)
195 /* Nonzero if MODE is a scalar/vector fract or ufract mode. */
196 #define ALL_FRACT_MODE_P(MODE) \
197 (FRACT_MODE_P (MODE) || UFRACT_MODE_P (MODE))
199 /* Nonzero if MODE is a scalar/vector accum mode. */
200 #define ACCUM_MODE_P(MODE) \
201 (GET_MODE_CLASS (MODE) == MODE_ACCUM \
202 || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM)
204 /* Nonzero if MODE is a scalar/vector uaccum mode. */
205 #define UACCUM_MODE_P(MODE) \
206 (GET_MODE_CLASS (MODE) == MODE_UACCUM \
207 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM)
209 /* Nonzero if MODE is a scalar/vector accum or uaccum mode. */
210 #define ALL_ACCUM_MODE_P(MODE) \
211 (ACCUM_MODE_P (MODE) || UACCUM_MODE_P (MODE))
213 /* Nonzero if MODE is a scalar/vector fract or accum mode. */
214 #define SIGNED_FIXED_POINT_MODE_P(MODE) \
215 (FRACT_MODE_P (MODE) || ACCUM_MODE_P (MODE))
217 /* Nonzero if MODE is a scalar/vector ufract or uaccum mode. */
218 #define UNSIGNED_FIXED_POINT_MODE_P(MODE) \
219 (UFRACT_MODE_P (MODE) || UACCUM_MODE_P (MODE))
221 /* Nonzero if MODE is a scalar/vector fract, ufract, accum or uaccum mode. */
222 #define ALL_FIXED_POINT_MODE_P(MODE) \
223 (SIGNED_FIXED_POINT_MODE_P (MODE) \
224 || UNSIGNED_FIXED_POINT_MODE_P (MODE))
226 /* Nonzero if CLASS modes can be widened. */
227 #define CLASS_HAS_WIDER_MODES_P(CLASS) \
229 || CLASS == MODE_PARTIAL_INT \
230 || CLASS == MODE_FLOAT \
231 || CLASS == MODE_DECIMAL_FLOAT \
232 || CLASS == MODE_COMPLEX_FLOAT \
233 || CLASS == MODE_FRACT \
234 || CLASS == MODE_UFRACT \
235 || CLASS == MODE_ACCUM \
236 || CLASS == MODE_UACCUM)
238 #define POINTER_BOUNDS_MODE_P(MODE) \
239 (GET_MODE_CLASS (MODE) == MODE_POINTER_BOUNDS)
241 /* An optional T (i.e. a T or nothing), where T is some form of mode class. */
246 enum from_int { dummy = MAX_MACHINE_MODE };
248 ALWAYS_INLINE opt_mode () : m_mode (E_VOIDmode) {}
249 ALWAYS_INLINE opt_mode (const T &m) : m_mode (m) {}
251 ALWAYS_INLINE opt_mode (const U &m) : m_mode (T (m)) {}
252 ALWAYS_INLINE opt_mode (from_int m) : m_mode (machine_mode (m)) {}
254 machine_mode else_void () const;
255 machine_mode else_blk () const;
258 bool exists () const;
259 template<typename U> bool exists (U *) const;
265 /* If the object contains a T, return its enum value, otherwise return
269 ALWAYS_INLINE machine_mode
270 opt_mode<T>::else_void () const
275 /* If the T exists, return its enum value, otherwise return E_BLKmode. */
279 opt_mode<T>::else_blk () const
281 return m_mode == E_VOIDmode ? E_BLKmode : m_mode;
284 /* Assert that the object contains a T and return it. */
288 opt_mode<T>::require () const
290 gcc_checking_assert (m_mode != E_VOIDmode);
291 return typename mode_traits<T>::from_int (m_mode);
294 /* Return true if the object contains a T rather than nothing. */
298 opt_mode<T>::exists () const
300 return m_mode != E_VOIDmode;
303 /* Return true if the object contains a T, storing it in *MODE if so. */
308 opt_mode<T>::exists (U *mode) const
310 if (m_mode != E_VOIDmode)
312 *mode = T (typename mode_traits<T>::from_int (m_mode));
318 /* A POD version of mode class T. */
323 typedef typename mode_traits<T>::from_int from_int;
324 typedef typename T::measurement_type measurement_type;
327 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
328 ALWAYS_INLINE operator T () const { return from_int (m_mode); }
329 ALWAYS_INLINE pod_mode &operator = (const T &m) { m_mode = m; return *this; }
332 /* Return true if mode M has type T. */
336 is_a (machine_mode m)
338 return T::includes_p (m);
341 template<typename T, typename U>
343 is_a (const opt_mode<U> &m)
345 return T::includes_p (m.else_void ());
348 /* Assert that mode M has type T, and return it in that form. */
352 as_a (machine_mode m)
354 gcc_checking_assert (T::includes_p (m));
355 return typename mode_traits<T>::from_int (m);
358 template<typename T, typename U>
360 as_a (const opt_mode<U> &m)
362 return as_a <T> (m.else_void ());
365 /* Convert M to an opt_mode<T>. */
369 dyn_cast (machine_mode m)
371 if (T::includes_p (m))
372 return T (typename mode_traits<T>::from_int (m));
373 return opt_mode<T> ();
376 template<typename T, typename U>
378 dyn_cast (const opt_mode<U> &m)
380 return dyn_cast <T> (m.else_void ());
383 /* Return true if mode M has type T, storing it as a T in *RESULT
386 template<typename T, typename U>
388 is_a (machine_mode m, U *result)
390 if (T::includes_p (m))
392 *result = T (typename mode_traits<T>::from_int (m));
398 /* Represents a machine mode that is known to be a SCALAR_INT_MODE_P. */
399 class scalar_int_mode
402 typedef mode_traits<scalar_int_mode>::from_int from_int;
403 typedef unsigned short measurement_type;
405 ALWAYS_INLINE scalar_int_mode () {}
406 ALWAYS_INLINE scalar_int_mode (from_int m) : m_mode (machine_mode (m)) {}
407 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
409 static bool includes_p (machine_mode);
415 /* Return true if M is a scalar_int_mode. */
418 scalar_int_mode::includes_p (machine_mode m)
420 return SCALAR_INT_MODE_P (m);
423 /* Represents a machine mode that is known to be a SCALAR_FLOAT_MODE_P. */
424 class scalar_float_mode
427 typedef mode_traits<scalar_float_mode>::from_int from_int;
428 typedef unsigned short measurement_type;
430 ALWAYS_INLINE scalar_float_mode () {}
431 ALWAYS_INLINE scalar_float_mode (from_int m) : m_mode (machine_mode (m)) {}
432 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
434 static bool includes_p (machine_mode);
440 /* Return true if M is a scalar_float_mode. */
443 scalar_float_mode::includes_p (machine_mode m)
445 return SCALAR_FLOAT_MODE_P (m);
448 /* Represents a machine mode that is known to be scalar. */
452 typedef mode_traits<scalar_mode>::from_int from_int;
453 typedef unsigned short measurement_type;
455 ALWAYS_INLINE scalar_mode () {}
456 ALWAYS_INLINE scalar_mode (from_int m) : m_mode (machine_mode (m)) {}
457 ALWAYS_INLINE scalar_mode (const scalar_int_mode &m) : m_mode (m) {}
458 ALWAYS_INLINE scalar_mode (const scalar_float_mode &m) : m_mode (m) {}
459 ALWAYS_INLINE scalar_mode (const scalar_int_mode_pod &m) : m_mode (m) {}
460 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
462 static bool includes_p (machine_mode);
468 /* Return true if M represents some kind of scalar value. */
471 scalar_mode::includes_p (machine_mode m)
473 switch (GET_MODE_CLASS (m))
476 case MODE_PARTIAL_INT:
482 case MODE_DECIMAL_FLOAT:
483 case MODE_POINTER_BOUNDS:
490 /* Represents a machine mode that is known to be a COMPLEX_MODE_P. */
494 typedef mode_traits<complex_mode>::from_int from_int;
495 typedef unsigned short measurement_type;
497 ALWAYS_INLINE complex_mode () {}
498 ALWAYS_INLINE complex_mode (from_int m) : m_mode (machine_mode (m)) {}
499 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
501 static bool includes_p (machine_mode);
507 /* Return true if M is a complex_mode. */
510 complex_mode::includes_p (machine_mode m)
512 return COMPLEX_MODE_P (m);
515 /* Return the base GET_MODE_SIZE value for MODE. */
517 ALWAYS_INLINE unsigned short
518 mode_to_bytes (machine_mode mode)
520 #if GCC_VERSION >= 4001
521 return (__builtin_constant_p (mode)
522 ? mode_size_inline (mode) : mode_size[mode]);
524 return mode_size[mode];
528 /* Return the base GET_MODE_BITSIZE value for MODE. */
530 ALWAYS_INLINE unsigned short
531 mode_to_bits (machine_mode mode)
533 return mode_to_bytes (mode) * BITS_PER_UNIT;
536 /* Return the base GET_MODE_PRECISION value for MODE. */
538 ALWAYS_INLINE poly_uint16
539 mode_to_precision (machine_mode mode)
541 return mode_precision[mode];
544 /* Return the base GET_MODE_INNER value for MODE. */
546 ALWAYS_INLINE scalar_mode
547 mode_to_inner (machine_mode mode)
549 #if GCC_VERSION >= 4001
550 return scalar_mode::from_int (__builtin_constant_p (mode)
551 ? mode_inner_inline (mode)
554 return scalar_mode::from_int (mode_inner[mode]);
558 /* Return the base GET_MODE_UNIT_SIZE value for MODE. */
560 ALWAYS_INLINE unsigned char
561 mode_to_unit_size (machine_mode mode)
563 #if GCC_VERSION >= 4001
564 return (__builtin_constant_p (mode)
565 ? mode_unit_size_inline (mode) : mode_unit_size[mode]);
567 return mode_unit_size[mode];
571 /* Return the base GET_MODE_UNIT_PRECISION value for MODE. */
573 ALWAYS_INLINE unsigned short
574 mode_to_unit_precision (machine_mode mode)
576 #if GCC_VERSION >= 4001
577 return (__builtin_constant_p (mode)
578 ? mode_unit_precision_inline (mode) : mode_unit_precision[mode]);
580 return mode_unit_precision[mode];
584 /* Return the base GET_MODE_NUNITS value for MODE. */
586 ALWAYS_INLINE poly_uint16
587 mode_to_nunits (machine_mode mode)
589 #if GCC_VERSION >= 4001
590 return (__builtin_constant_p (mode)
591 ? mode_nunits_inline (mode) : mode_nunits[mode]);
593 return mode_nunits[mode];
597 /* Get the size in bytes of an object of mode MODE. */
599 #define GET_MODE_SIZE(MODE) (mode_to_bytes (MODE))
601 /* Get the size in bits of an object of mode MODE. */
603 #define GET_MODE_BITSIZE(MODE) (mode_to_bits (MODE))
605 /* Get the number of value bits of an object of mode MODE. */
607 #if ONLY_FIXED_SIZE_MODES
608 #define GET_MODE_PRECISION(MODE) \
609 ((unsigned short) mode_to_precision (MODE).coeffs[0])
611 ALWAYS_INLINE poly_uint16
612 GET_MODE_PRECISION (machine_mode mode)
614 return mode_to_precision (mode);
618 ALWAYS_INLINE typename if_poly<typename T::measurement_type>::type
619 GET_MODE_PRECISION (const T &mode)
621 return mode_to_precision (mode);
625 ALWAYS_INLINE typename if_nonpoly<typename T::measurement_type>::type
626 GET_MODE_PRECISION (const T &mode)
628 return mode_to_precision (mode).coeffs[0];
632 /* Get the number of integral bits of an object of mode MODE. */
633 extern CONST_MODE_IBIT unsigned char mode_ibit[NUM_MACHINE_MODES];
634 #define GET_MODE_IBIT(MODE) mode_ibit[MODE]
636 /* Get the number of fractional bits of an object of mode MODE. */
637 extern CONST_MODE_FBIT unsigned char mode_fbit[NUM_MACHINE_MODES];
638 #define GET_MODE_FBIT(MODE) mode_fbit[MODE]
640 /* Get a bitmask containing 1 for all bits in a word
641 that fit within mode MODE. */
643 extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES];
645 #define GET_MODE_MASK(MODE) mode_mask_array[MODE]
647 /* Return the mode of the basic parts of MODE. For vector modes this is the
648 mode of the vector elements. For complex modes it is the mode of the real
649 and imaginary parts. For other modes it is MODE itself. */
651 #define GET_MODE_INNER(MODE) (mode_to_inner (MODE))
653 /* Get the size in bytes or bits of the basic parts of an
654 object of mode MODE. */
656 #define GET_MODE_UNIT_SIZE(MODE) mode_to_unit_size (MODE)
658 #define GET_MODE_UNIT_BITSIZE(MODE) \
659 ((unsigned short) (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))
661 #define GET_MODE_UNIT_PRECISION(MODE) (mode_to_unit_precision (MODE))
663 /* Get the number of units in an object of mode MODE. This is 2 for
664 complex modes and the number of elements for vector modes. */
666 #if ONLY_FIXED_SIZE_MODES
667 #define GET_MODE_NUNITS(MODE) (mode_to_nunits (MODE).coeffs[0])
669 ALWAYS_INLINE poly_uint16
670 GET_MODE_NUNITS (machine_mode mode)
672 return mode_to_nunits (mode);
676 ALWAYS_INLINE typename if_poly<typename T::measurement_type>::type
677 GET_MODE_NUNITS (const T &mode)
679 return mode_to_nunits (mode);
683 ALWAYS_INLINE typename if_nonpoly<typename T::measurement_type>::type
684 GET_MODE_NUNITS (const T &mode)
686 return mode_to_nunits (mode).coeffs[0];
690 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
693 ALWAYS_INLINE opt_mode<T>
694 GET_MODE_WIDER_MODE (const T &m)
696 return typename opt_mode<T>::from_int (mode_wider[m]);
699 /* For scalars, this is a mode with twice the precision. For vectors,
700 this is a mode with the same inner mode but with twice the elements. */
703 ALWAYS_INLINE opt_mode<T>
704 GET_MODE_2XWIDER_MODE (const T &m)
706 return typename opt_mode<T>::from_int (mode_2xwider[m]);
709 /* Get the complex mode from the component mode. */
710 extern const unsigned char mode_complex[NUM_MACHINE_MODES];
711 #define GET_MODE_COMPLEX_MODE(MODE) ((machine_mode) mode_complex[MODE])
713 /* Represents a machine mode that must have a fixed size. The main
714 use of this class is to represent the modes of objects that always
715 have static storage duration, such as constant pool entries.
716 (No current target supports the concept of variable-size static data.) */
717 class fixed_size_mode
720 typedef mode_traits<fixed_size_mode>::from_int from_int;
721 typedef unsigned short measurement_type;
723 ALWAYS_INLINE fixed_size_mode () {}
724 ALWAYS_INLINE fixed_size_mode (from_int m) : m_mode (machine_mode (m)) {}
725 ALWAYS_INLINE fixed_size_mode (const scalar_mode &m) : m_mode (m) {}
726 ALWAYS_INLINE fixed_size_mode (const scalar_int_mode &m) : m_mode (m) {}
727 ALWAYS_INLINE fixed_size_mode (const scalar_float_mode &m) : m_mode (m) {}
728 ALWAYS_INLINE fixed_size_mode (const scalar_mode_pod &m) : m_mode (m) {}
729 ALWAYS_INLINE fixed_size_mode (const scalar_int_mode_pod &m) : m_mode (m) {}
730 ALWAYS_INLINE fixed_size_mode (const complex_mode &m) : m_mode (m) {}
731 ALWAYS_INLINE operator machine_mode () const { return m_mode; }
733 static bool includes_p (machine_mode);
739 /* Return true if MODE has a fixed size. */
742 fixed_size_mode::includes_p (machine_mode)
747 /* Wrapper for mode arguments to target macros, so that if a target
748 doesn't need polynomial-sized modes, its header file can continue
749 to treat everything as fixed_size_mode. This should go away once
750 macros are moved to target hooks. It shouldn't be used in other
752 #if NUM_POLY_INT_COEFFS == 1
753 #define MACRO_MODE(MODE) (as_a <fixed_size_mode> (MODE))
755 #define MACRO_MODE(MODE) (MODE)
758 extern opt_machine_mode mode_for_size (poly_uint64, enum mode_class, int);
760 /* Return the machine mode to use for a MODE_INT of SIZE bits, if one
761 exists. If LIMIT is nonzero, modes wider than MAX_FIXED_MODE_SIZE
764 inline opt_scalar_int_mode
765 int_mode_for_size (poly_uint64 size, int limit)
767 return dyn_cast <scalar_int_mode> (mode_for_size (size, MODE_INT, limit));
770 /* Return the machine mode to use for a MODE_FLOAT of SIZE bits, if one
773 inline opt_scalar_float_mode
774 float_mode_for_size (poly_uint64 size)
776 return dyn_cast <scalar_float_mode> (mode_for_size (size, MODE_FLOAT, 0));
779 /* Likewise for MODE_DECIMAL_FLOAT. */
781 inline opt_scalar_float_mode
782 decimal_float_mode_for_size (unsigned int size)
784 return dyn_cast <scalar_float_mode>
785 (mode_for_size (size, MODE_DECIMAL_FLOAT, 0));
788 extern machine_mode smallest_mode_for_size (poly_uint64, enum mode_class);
790 /* Find the narrowest integer mode that contains at least SIZE bits.
791 Such a mode must exist. */
793 inline scalar_int_mode
794 smallest_int_mode_for_size (poly_uint64 size)
796 return as_a <scalar_int_mode> (smallest_mode_for_size (size, MODE_INT));
799 extern opt_scalar_int_mode int_mode_for_mode (machine_mode);
800 extern opt_machine_mode bitwise_mode_for_mode (machine_mode);
801 extern opt_machine_mode mode_for_vector (scalar_mode, poly_uint64);
802 extern opt_machine_mode mode_for_int_vector (unsigned int, poly_uint64);
804 /* Return the integer vector equivalent of MODE, if one exists. In other
805 words, return the mode for an integer vector that has the same number
806 of bits as MODE and the same number of elements as MODE, with the
807 latter being 1 if MODE is scalar. The returned mode can be either
808 an integer mode or a vector mode. */
810 inline opt_machine_mode
811 mode_for_int_vector (machine_mode mode)
813 return mode_for_int_vector (GET_MODE_UNIT_BITSIZE (mode),
814 GET_MODE_NUNITS (mode));
817 /* A class for iterating through possible bitfield modes. */
818 class bit_field_mode_iterator
821 bit_field_mode_iterator (HOST_WIDE_INT, HOST_WIDE_INT,
822 poly_int64, poly_int64,
824 bool next_mode (scalar_int_mode *);
825 bool prefer_smaller_modes ();
828 opt_scalar_int_mode m_mode;
829 /* We use signed values here because the bit position can be negative
830 for invalid input such as gcc.dg/pr48335-8.c. */
831 HOST_WIDE_INT m_bitsize;
832 HOST_WIDE_INT m_bitpos;
833 poly_int64 m_bitregion_start;
834 poly_int64 m_bitregion_end;
835 unsigned int m_align;
840 /* Find the best mode to use to access a bit field. */
842 extern bool get_best_mode (int, int, poly_uint64, poly_uint64, unsigned int,
843 unsigned HOST_WIDE_INT, bool, scalar_int_mode *);
845 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
847 extern CONST_MODE_BASE_ALIGN unsigned short mode_base_align[NUM_MACHINE_MODES];
849 extern unsigned get_mode_alignment (machine_mode);
851 #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE)
853 /* For each class, get the narrowest mode in that class. */
855 extern const unsigned char class_narrowest_mode[MAX_MODE_CLASS];
856 #define GET_CLASS_NARROWEST_MODE(CLASS) \
857 ((machine_mode) class_narrowest_mode[CLASS])
859 /* The narrowest full integer mode available on the target. */
861 #define NARROWEST_INT_MODE \
863 (scalar_int_mode::from_int (class_narrowest_mode[MODE_INT])))
865 /* Return the narrowest mode in T's class. */
869 get_narrowest_mode (T mode)
871 return typename mode_traits<T>::from_int
872 (class_narrowest_mode[GET_MODE_CLASS (mode)]);
875 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
876 and the mode whose class is Pmode and whose size is POINTER_SIZE. */
878 extern scalar_int_mode byte_mode;
879 extern scalar_int_mode word_mode;
880 extern scalar_int_mode ptr_mode;
882 /* Target-dependent machine mode initialization - in insn-modes.c. */
883 extern void init_adjust_machine_modes (void);
885 #define TRULY_NOOP_TRUNCATION_MODES_P(MODE1, MODE2) \
886 (targetm.truly_noop_truncation (GET_MODE_PRECISION (MODE1), \
887 GET_MODE_PRECISION (MODE2)))
889 /* Return true if MODE is a scalar integer mode that fits in a
893 HWI_COMPUTABLE_MODE_P (machine_mode mode)
895 machine_mode mme = mode;
896 return (SCALAR_INT_MODE_P (mme)
897 && mode_to_precision (mme).coeffs[0] <= HOST_BITS_PER_WIDE_INT);
901 HWI_COMPUTABLE_MODE_P (scalar_int_mode mode)
903 return GET_MODE_PRECISION (mode) <= HOST_BITS_PER_WIDE_INT;
906 struct int_n_data_t {
907 /* These parts are initailized by genmodes output */
908 unsigned int bitsize;
909 scalar_int_mode_pod m;
910 /* RID_* is RID_INTN_BASE + index into this array */
913 /* This is also in tree.h. genmodes.c guarantees the're sorted from
914 smallest bitsize to largest bitsize. */
915 extern bool int_n_enabled_p[NUM_INT_N_ENTS];
916 extern const int_n_data_t int_n_data[NUM_INT_N_ENTS];
918 /* Return true if MODE has class MODE_INT, storing it as a scalar_int_mode
919 in *INT_MODE if so. */
923 is_int_mode (machine_mode mode, T *int_mode)
925 if (GET_MODE_CLASS (mode) == MODE_INT)
927 *int_mode = scalar_int_mode (scalar_int_mode::from_int (mode));
933 /* Return true if MODE has class MODE_FLOAT, storing it as a
934 scalar_float_mode in *FLOAT_MODE if so. */
938 is_float_mode (machine_mode mode, T *float_mode)
940 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
942 *float_mode = scalar_float_mode (scalar_float_mode::from_int (mode));
948 /* Return true if MODE has class MODE_COMPLEX_INT, storing it as
949 a complex_mode in *CMODE if so. */
953 is_complex_int_mode (machine_mode mode, T *cmode)
955 if (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT)
957 *cmode = complex_mode (complex_mode::from_int (mode));
963 /* Return true if MODE has class MODE_COMPLEX_FLOAT, storing it as
964 a complex_mode in *CMODE if so. */
968 is_complex_float_mode (machine_mode mode, T *cmode)
970 if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
972 *cmode = complex_mode (complex_mode::from_int (mode));
978 /* Return true if MODE is a scalar integer mode with a precision
979 smaller than LIMIT's precision. */
982 is_narrower_int_mode (machine_mode mode, scalar_int_mode limit)
984 scalar_int_mode int_mode;
985 return (is_a <scalar_int_mode> (mode, &int_mode)
986 && GET_MODE_PRECISION (int_mode) < GET_MODE_PRECISION (limit));
989 namespace mode_iterator
991 /* Start mode iterator *ITER at the first mode in class MCLASS, if any. */
995 start (opt_mode<T> *iter, enum mode_class mclass)
997 if (GET_CLASS_NARROWEST_MODE (mclass) == E_VOIDmode)
998 *iter = opt_mode<T> ();
1000 *iter = as_a<T> (GET_CLASS_NARROWEST_MODE (mclass));
1004 start (machine_mode *iter, enum mode_class mclass)
1006 *iter = GET_CLASS_NARROWEST_MODE (mclass);
1009 /* Return true if mode iterator *ITER has not reached the end. */
1011 template<typename T>
1013 iterate_p (opt_mode<T> *iter)
1015 return iter->exists ();
1019 iterate_p (machine_mode *iter)
1021 return *iter != E_VOIDmode;
1024 /* Set mode iterator *ITER to the next widest mode in the same class,
1027 template<typename T>
1029 get_wider (opt_mode<T> *iter)
1031 *iter = GET_MODE_WIDER_MODE (iter->require ());
1035 get_wider (machine_mode *iter)
1037 *iter = GET_MODE_WIDER_MODE (*iter).else_void ();
1040 /* Set mode iterator *ITER to the next widest mode in the same class.
1041 Such a mode is known to exist. */
1043 template<typename T>
1045 get_known_wider (T *iter)
1047 *iter = GET_MODE_WIDER_MODE (*iter).require ();
1050 /* Set mode iterator *ITER to the mode that is two times wider than the
1051 current one, if such a mode exists. */
1053 template<typename T>
1055 get_2xwider (opt_mode<T> *iter)
1057 *iter = GET_MODE_2XWIDER_MODE (iter->require ());
1061 get_2xwider (machine_mode *iter)
1063 *iter = GET_MODE_2XWIDER_MODE (*iter).else_void ();
1067 /* Make ITERATOR iterate over all the modes in mode class CLASS,
1068 from narrowest to widest. */
1069 #define FOR_EACH_MODE_IN_CLASS(ITERATOR, CLASS) \
1070 for (mode_iterator::start (&(ITERATOR), CLASS); \
1071 mode_iterator::iterate_p (&(ITERATOR)); \
1072 mode_iterator::get_wider (&(ITERATOR)))
1074 /* Make ITERATOR iterate over all the modes in the range [START, END),
1075 in order of increasing width. */
1076 #define FOR_EACH_MODE(ITERATOR, START, END) \
1077 for ((ITERATOR) = (START); \
1078 (ITERATOR) != (END); \
1079 mode_iterator::get_known_wider (&(ITERATOR)))
1081 /* Make ITERATOR iterate over START and all wider modes in the same
1082 class, in order of increasing width. */
1083 #define FOR_EACH_MODE_FROM(ITERATOR, START) \
1084 for ((ITERATOR) = (START); \
1085 mode_iterator::iterate_p (&(ITERATOR)); \
1086 mode_iterator::get_wider (&(ITERATOR)))
1088 /* Make ITERATOR iterate over modes in the range [NARROWEST, END)
1089 in order of increasing width, where NARROWEST is the narrowest mode
1091 #define FOR_EACH_MODE_UNTIL(ITERATOR, END) \
1092 FOR_EACH_MODE (ITERATOR, get_narrowest_mode (END), END)
1094 /* Make ITERATOR iterate over modes in the same class as MODE, in order
1095 of increasing width. Start at the first mode wider than START,
1096 or don't iterate at all if there is no wider mode. */
1097 #define FOR_EACH_WIDER_MODE(ITERATOR, START) \
1098 for ((ITERATOR) = (START), mode_iterator::get_wider (&(ITERATOR)); \
1099 mode_iterator::iterate_p (&(ITERATOR)); \
1100 mode_iterator::get_wider (&(ITERATOR)))
1102 /* Make ITERATOR iterate over modes in the same class as MODE, in order
1103 of increasing width, and with each mode being twice the width of the
1104 previous mode. Start at the mode that is two times wider than START,
1105 or don't iterate at all if there is no such mode. */
1106 #define FOR_EACH_2XWIDER_MODE(ITERATOR, START) \
1107 for ((ITERATOR) = (START), mode_iterator::get_2xwider (&(ITERATOR)); \
1108 mode_iterator::iterate_p (&(ITERATOR)); \
1109 mode_iterator::get_2xwider (&(ITERATOR)))
1111 template<typename T>
1113 gt_ggc_mx (pod_mode<T> *)
1117 template<typename T>
1119 gt_pch_nx (pod_mode<T> *)
1123 template<typename T>
1125 gt_pch_nx (pod_mode<T> *, void (*) (void *, void *), void *)
1129 #endif /* not HAVE_MACHINE_MODES */