diff options
| author | Richard Sandiford <rsandifo@redhat.com> | 2004-09-04 08:50:36 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@redhat.com> | 2004-09-04 08:50:36 +0000 |
| commit | 06834ccaa68df039bf45ad2bde2df394bace2a90 (patch) | |
| tree | 4320b41f468e28f9439feab3f57dff953085081c /gcc/target.h | |
| parent | ecfecbc7d82f6871d3024d2760972770b3e8bd53 (diff) | |
* doc/md.texi (shift patterns): New anchor. Add reference to
TARGET_SHIFT_TRUNCATION_MASK.
* doc/tm.texi (TARGET_SHIFT_TRUNCATION_MASK): Document.
* target.h (shift_truncation_mask): New target hook.
* targhook.h (default_shift_truncation_mask): Declare.
* targhook.c (default_shift_truncation_mask): Define.
* target-def.h (TARGET_SHIFT_TRUNCATION_MASK): Define.
(TARGET_INITIALIZER): Include it.
* simplify-rtx.c (simplify_binary_operation): Combine ASHIFT, ASHIFTRT
and LSHIFTRT cases. Truncate arg1 if SHIFT_COUNT_TRUNCATED, otherwise
reject all out-of-range values. Fix sign-extension code for modes
whose width is smaller than HOST_BITS_PER_WIDE_INT.
* optabs.c (simplify_expand_binop, force_expand_binop): New functions.
(expand_superword_shift, expand_subword_shift): Likewise.
(expand_doubleword_shift_condmove, expand_doubleword_shift): Likewise.
(expand_binop): Use them to implement double-word shifts.
* config/arm/arm.c (arm_shift_truncation_mask): New function.
(TARGET_SHIFT_TRUNCATION_MASK): Define.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@87079 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/target.h')
| -rw-r--r-- | gcc/target.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/target.h b/gcc/target.h index 035aeed4426..735a85d11dd 100644 --- a/gcc/target.h +++ b/gcc/target.h @@ -378,6 +378,10 @@ struct gcc_target /* Undo the effects of encode_section_info on the symbol string. */ const char * (* strip_name_encoding) (const char *); + /* If shift optabs for MODE are known to always truncate the shift count, + return the mask that they apply. Return 0 otherwise. */ + unsigned HOST_WIDE_INT (* shift_truncation_mask) (enum machine_mode mode); + /* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */ bool (* valid_pointer_mode) (enum machine_mode mode); |