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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-09-19 15:40:40 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-09-19 15:40:40 -0400 |
| commit | ef457bda4a234a0b51446e9d04a7666183ef32db (patch) | |
| tree | c34849dd85f6db27361680200fd0faca21e21ba2 | |
| parent | 2f622005460f29dea04d53badc03ab3cfee176e2 (diff) | |
| download | gcc-ef457bda4a234a0b51446e9d04a7666183ef32db.zip gcc-ef457bda4a234a0b51446e9d04a7666183ef32db.tar.gz gcc-ef457bda4a234a0b51446e9d04a7666183ef32db.tar.bz2 | |
(PROMOTE_MODE): New macro.
(BRANCH_COST): Increase from 2 to 3.
From-SVN: r2167
| -rw-r--r-- | gcc/config/rs6000/rs6000.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 820ee4f..5cbb363 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -104,6 +104,17 @@ extern int target_flags; /* target machine storage layout */ +/* Define this macro if it is advisible to hold scalars in registers + in a wider mode than that declared by the program. In such cases, + the value is constrained to be within the bounds of the declared + type, but kept valid in the wider mode. The signedness of the + extension may differ from that of the type. */ + +#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ + if (GET_MODE_CLASS (MODE) == MODE_INT \ + && GET_MODE_SIZE (MODE) < 4) \ + (MODE) == SImode; + /* Define this if most significant bit is lowest numbered in instructions that operate on numbered bit-fields. */ /* That is true on RS/6000. */ @@ -336,10 +347,10 @@ extern int target_flags; /* Specify the cost of a branch insn; roughly the number of extra insns that should be added to avoid a branch. - Set this to 2 on the RS/6000 since that is roughly the average cost of an + Set this to 3 on the RS/6000 since that is roughly the average cost of an unscheduled conditional branch. */ -#define BRANCH_COST 2 +#define BRANCH_COST 3 /* Specify the registers used for certain standard purposes. The values of these macros are register numbers. */ |