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| author | Michael Hayes <m.hayes@elec.canterbury.ac.nz> | 1999-04-01 16:16:53 +0000 |
|---|---|---|
| committer | Michael Hayes <m.hayes@gcc.gnu.org> | 1999-04-01 16:16:53 +0000 |
| commit | 4adf744bb421f09a46cf1a3eaa67dc3c816fd427 (patch) | |
| tree | c2df378861e95ead714afe1d2a177302a7ec160c | |
| parent | 305902b0060c25d10dd886506e6593ee680b8be1 (diff) | |
| download | gcc-4adf744bb421f09a46cf1a3eaa67dc3c816fd427.zip gcc-4adf744bb421f09a46cf1a3eaa67dc3c816fd427.tar.gz gcc-4adf744bb421f09a46cf1a3eaa67dc3c816fd427.tar.bz2 | |
* config/c4x/c4x.h: Added more comments.
From-SVN: r26107
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/c4x/c4x.h | 13 |
2 files changed, 14 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7c68382..7b482c8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Fri Apr 2 12:16:15 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz> + + * config/c4x/c4x.h: Added more comments. + Fri Apr 2 11:58:22 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz> * config/c4x/c4x.c (c4x_emit_move_sequence): Force invalid QImode diff --git a/gcc/config/c4x/c4x.h b/gcc/config/c4x/c4x.h index a72d6db..347ce2c 100644 --- a/gcc/config/c4x/c4x.h +++ b/gcc/config/c4x/c4x.h @@ -1589,11 +1589,18 @@ extern struct rtx_def *c4x_gen_compare_reg (); #define HAVE_PRE_MODIFY_DISP 1 #define HAVE_POST_MODIFY_DISP 1 -#define HAVE_MULTIPLE_PACK 2 - -/* What about LABEL_REF? */ +/* The number of insns that can be packed into a single opcode. */ +#define MULTIPACK_INSNS 2 + +/* Recognize any constant value that is a valid address. + We could allow arbitrary constant addresses in the large memory + model but for the small memory model we can only accept addresses + within the data page. I suppose we could also allow + CONST PLUS SYMBOL_REF. */ #define CONSTANT_ADDRESS_P(X) (GET_CODE (X) == SYMBOL_REF) +/* Maximum number of registers that can appear in a valid memory + address. */ #define MAX_REGS_PER_ADDRESS 2 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx |