diff options
Diffstat (limited to 'gcc/machmode.h')
| -rw-r--r-- | gcc/machmode.h | 70 |
1 files changed, 64 insertions, 6 deletions
diff --git a/gcc/machmode.h b/gcc/machmode.h index 45df720df..99b0e46 100644 --- a/gcc/machmode.h +++ b/gcc/machmode.h @@ -28,6 +28,7 @@ extern const unsigned char mode_inner[NUM_MACHINE_MODES]; extern CONST_MODE_NUNITS poly_uint16_pod mode_nunits[NUM_MACHINE_MODES]; extern CONST_MODE_UNIT_SIZE unsigned char mode_unit_size[NUM_MACHINE_MODES]; extern const unsigned short mode_unit_precision[NUM_MACHINE_MODES]; +extern const unsigned char mode_next[NUM_MACHINE_MODES]; extern const unsigned char mode_wider[NUM_MACHINE_MODES]; extern const unsigned char mode_2xwider[NUM_MACHINE_MODES]; @@ -760,7 +761,23 @@ GET_MODE_NUNITS (const T &mode) } #endif -/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ +/* Get the next natural mode (not narrower, eg, QI -> HI -> SI -> DI -> TI + or HF -> BF -> SF -> DF -> XF -> TF). */ + +template<typename T> +ALWAYS_INLINE opt_mode<T> +GET_MODE_NEXT_MODE (const T &m) +{ + return typename opt_mode<T>::from_int (mode_next[m]); +} + +/* Get the next wider mode (eg, QI -> HI -> SI -> DI -> TI + or { HF, BF } -> SF -> DF -> XF -> TF). + This is similar to GET_MODE_NEXT_MODE, but while GET_MODE_NEXT_MODE + can include mode that have the same precision (e.g. + GET_MODE_NEXT_MODE (HFmode) can be BFmode even when both have the same + precision), this one will skip those. And always VOIDmode for + modes whose class is !CLASS_HAS_WIDER_MODES_P. */ template<typename T> ALWAYS_INLINE opt_mode<T> @@ -1098,7 +1115,33 @@ namespace mode_iterator return *iter != E_VOIDmode; } - /* Set mode iterator *ITER to the next widest mode in the same class, + /* Set mode iterator *ITER to the next mode in the same class, + if any. */ + + template<typename T> + inline void + get_next (opt_mode<T> *iter) + { + *iter = GET_MODE_NEXT_MODE (iter->require ()); + } + + inline void + get_next (machine_mode *iter) + { + *iter = GET_MODE_NEXT_MODE (*iter).else_void (); + } + + /* Set mode iterator *ITER to the next mode in the same class. + Such a mode is known to exist. */ + + template<typename T> + inline void + get_known_next (T *iter) + { + *iter = GET_MODE_NEXT_MODE (*iter).require (); + } + + /* Set mode iterator *ITER to the next wider mode in the same class, if any. */ template<typename T> @@ -1114,7 +1157,7 @@ namespace mode_iterator *iter = GET_MODE_WIDER_MODE (*iter).else_void (); } - /* Set mode iterator *ITER to the next widest mode in the same class. + /* Set mode iterator *ITER to the next wider mode in the same class. Such a mode is known to exist. */ template<typename T> @@ -1146,20 +1189,27 @@ namespace mode_iterator #define FOR_EACH_MODE_IN_CLASS(ITERATOR, CLASS) \ for (mode_iterator::start (&(ITERATOR), CLASS); \ mode_iterator::iterate_p (&(ITERATOR)); \ - mode_iterator::get_wider (&(ITERATOR))) + mode_iterator::get_next (&(ITERATOR))) /* Make ITERATOR iterate over all the modes in the range [START, END), in order of increasing width. */ #define FOR_EACH_MODE(ITERATOR, START, END) \ for ((ITERATOR) = (START); \ (ITERATOR) != (END); \ - mode_iterator::get_known_wider (&(ITERATOR))) + mode_iterator::get_known_next (&(ITERATOR))) -/* Make ITERATOR iterate over START and all wider modes in the same +/* Make ITERATOR iterate over START and all non-narrower modes in the same class, in order of increasing width. */ #define FOR_EACH_MODE_FROM(ITERATOR, START) \ for ((ITERATOR) = (START); \ mode_iterator::iterate_p (&(ITERATOR)); \ + mode_iterator::get_next (&(ITERATOR))) + +/* Make ITERATOR iterate over START and all wider modes in the same + class, in order of strictly increasing width. */ +#define FOR_EACH_WIDER_MODE_FROM(ITERATOR, START) \ + for ((ITERATOR) = (START); \ + mode_iterator::iterate_p (&(ITERATOR)); \ mode_iterator::get_wider (&(ITERATOR))) /* Make ITERATOR iterate over modes in the range [NARROWEST, END) @@ -1169,6 +1219,14 @@ namespace mode_iterator FOR_EACH_MODE (ITERATOR, get_narrowest_mode (END), END) /* Make ITERATOR iterate over modes in the same class as MODE, in order + of non-decreasing width. Start at next such mode after START, + or don't iterate at all if there is no such mode. */ +#define FOR_EACH_NEXT_MODE(ITERATOR, START) \ + for ((ITERATOR) = (START), mode_iterator::get_next (&(ITERATOR)); \ + mode_iterator::iterate_p (&(ITERATOR)); \ + mode_iterator::get_next (&(ITERATOR))) + +/* Make ITERATOR iterate over modes in the same class as MODE, in order of increasing width. Start at the first mode wider than START, or don't iterate at all if there is no wider mode. */ #define FOR_EACH_WIDER_MODE(ITERATOR, START) \ |