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| author | Adam Nemet <anemet@caviumnetworks.com> | 2006-04-17 01:59:41 +0000 |
|---|---|---|
| committer | Adam Nemet <nemet@gcc.gnu.org> | 2006-04-17 01:59:41 +0000 |
| commit | b12cbf2cc559fa466b854d89bc4069d7282a881f (patch) | |
| tree | 58a07ed2ef2fe0457a23ba7f949c521901afd762 /gcc/target.h | |
| parent | ca8b30c8d14e272af6129abc5c7df4a1f2961889 (diff) | |
| download | gcc-b12cbf2cc559fa466b854d89bc4069d7282a881f.zip gcc-b12cbf2cc559fa466b854d89bc4069d7282a881f.tar.gz gcc-b12cbf2cc559fa466b854d89bc4069d7282a881f.tar.bz2 | |
target.h (struct gcc_target): Add mode_rep_extended.
* target.h (struct gcc_target): Add mode_rep_extended.
* rtlanal.c (num_sign_bit_copies_in_rep): New global.
(init_num_sign_bit_copies_in_rep): Initialize it using
mode_rep_extended.
(truncate_to_mode): Use it.
(init_rtlanal): Call init_num_sign_bit_copies_in_rep.
* targhooks.h (default_mode_rep_extended): Declare it.
* targhooks.c (default_mode_rep_extended): Define it.
* target-def.h (TARGET_MODE_REP_EXTENDED): New macro. Default to
default_mode_rep_extended.
(TARGET_INITIALIZER): Include it.
* doc/tm.texi (Misc): Document it.
* config/mips/mips.c (TARGET_TRUNCATED_TO_MODE): Override it.
(mips_truncated_to_mode): New function.
From-SVN: r112998
Diffstat (limited to 'gcc/target.h')
| -rw-r--r-- | gcc/target.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/target.h b/gcc/target.h index b9d3578..f028754 100644 --- a/gcc/target.h +++ b/gcc/target.h @@ -520,6 +520,14 @@ struct gcc_target the reciprocal. */ unsigned int (* min_divisions_for_recip_mul) (enum machine_mode mode); + /* If the representation of integral MODE is such that values are + always sign-extended to a wider mode MODE_REP then return + SIGN_EXTEND. Return UNKNOWN otherwise. */ + /* Note that the return type ought to be RTX_CODE, but that's not + necessarily defined at this point. */ + int (* mode_rep_extended) (enum machine_mode mode, + enum machine_mode mode_rep); + /* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */ bool (* valid_pointer_mode) (enum machine_mode mode); |