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| author | Michael Meissner <meissner@gcc.gnu.org> | 1995-02-16 16:49:44 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 1995-02-16 16:49:44 +0000 |
| commit | 04742f20273efee1098bd3fc73e4f1e7abc6dd07 (patch) | |
| tree | 1f49ba5903083bd096ae91976636cb4fbed9d428 /gcc | |
| parent | 8ccc31eb61a00fdbfd838ba3c197a2b9932240bb (diff) | |
| download | gcc-04742f20273efee1098bd3fc73e4f1e7abc6dd07.zip gcc-04742f20273efee1098bd3fc73e4f1e7abc6dd07.tar.gz gcc-04742f20273efee1098bd3fc73e4f1e7abc6dd07.tar.bz2 | |
Add -m{,no-}strict-align support.
From-SVN: r8958
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/rs6000/eabi.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/config/rs6000/eabi.h b/gcc/config/rs6000/eabi.h index f7375bc..0d04790 100644 --- a/gcc/config/rs6000/eabi.h +++ b/gcc/config/rs6000/eabi.h @@ -23,13 +23,17 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Set PCC_BITFIELD_TYPE_MATTERS to 0 to ignore the type of bitfields when calculating alignment. */ #define MASK_NO_BITFIELD_TYPE 0x40000000 +#define MASK_STRICT_ALIGN 0x20000000 #define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE) #define TARGET_BITFIELD_TYPE (! TARGET_NO_BITFIELD_TYPE) +#define TARGET_STRICT_ALIGN (target_flags & MASK_STRICT_ALIGN) #define SUBTARGET_SWITCHES \ { "bit-align", -MASK_NO_BITFIELD_TYPE }, \ - { "no-bit-align", MASK_NO_BITFIELD_TYPE }, + { "no-bit-align", MASK_NO_BITFIELD_TYPE }, \ + { "strict-align", MASK_STRICT_ALIGN }, \ + { "no-strict-align", -MASK_STRICT_ALIGN }, #include "rs6000/sysv4.h" @@ -42,6 +46,12 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #undef PCC_BITFIELD_TYPE_MATTERS #define PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE) +/* Define this macro to be the value 1 if instructions will fail to + work if given data not on the nominal alignment. If instructions + will merely go slower in that case, define this macro as 0. */ +#undef STRICT_ALIGNMENT +#define STRICT_ALIGNMENT (TARGET_STRICT_ALIGN) + /* Align stack to 8 byte boundaries, rather than 16 bytes Sys V.4 uses */ #undef STACK_BOUNDARY #define STACK_BOUNDARY 64 |