diff options
| author | nathan <nathan@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-02-24 10:07:32 +0000 |
|---|---|---|
| committer | nathan <nathan@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-02-24 10:07:32 +0000 |
| commit | 3ce66181030ba3ff9867db2237ce96be6d158bdc (patch) | |
| tree | 962fb4d7ff5222127ff66ea4b5030cebc44cda72 | |
| parent | ca4d26d847c16099c4f7a20a23858cbc49daad75 (diff) | |
| download | gcc-3ce66181030ba3ff9867db2237ce96be6d158bdc.tar.gz | |
* machmode.h (get_mode_alignment): Declare.
(GET_MODE_ALIGNMENT): Call it.
* stor-layout.c (get_mode_alignment): New function. Make
sure alignment is always power of 2.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32134 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/machmode.h | 6 | ||||
| -rw-r--r-- | gcc/stor-layout.c | 17 |
3 files changed, 27 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 71765abe8e0..225b3bcae34 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2000-02-24 Nathan Sidwell <nathan@codesourcery.com> + + * machmode.h (get_mode_alignment): Declare. + (GET_MODE_ALIGNMENT): Call it. + * stor-layout.c (get_mode_alignment): New function. Make + sure alignment is always power of 2. + 2000-02-23 Zack Weinberg <zack@wolery.cumb.org> * i386.h: Remove useless definition of "I386" and misleading diff --git a/gcc/machmode.h b/gcc/machmode.h index 1f2fb2bbd09..702e20967a6 100644 --- a/gcc/machmode.h +++ b/gcc/machmode.h @@ -125,9 +125,9 @@ extern enum machine_mode get_best_mode PARAMS ((int, int, unsigned int, /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ -#define GET_MODE_ALIGNMENT(MODE) \ - (unsigned int) MIN (BIGGEST_ALIGNMENT, \ - MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))) +extern unsigned get_mode_alignment PARAMS ((enum machine_mode)); + +#define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE) /* For each class, get the narrowest mode in that class. */ diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index be27faeb221..3783a2ff814 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -1528,6 +1528,23 @@ get_best_mode (bitsize, bitpos, align, largest_mode, volatilep) return mode; } +/* Return the alignment of MODE. This will be bounded by 1 and + BIGGEST_ALIGNMENT. */ + +unsigned get_mode_alignment (mode) + enum machine_mode mode; +{ + unsigned alignment = GET_MODE_UNIT_SIZE (mode); + + /* Extract the LSB of the size. */ + alignment = alignment & -alignment; + + alignment *= BITS_PER_UNIT; + + alignment = MIN (BIGGEST_ALIGNMENT, MAX (1, alignment)); + return alignment; +} + /* This function is run once to initialize stor-layout.c. */ void |