diff options
| -rw-r--r-- | gcc/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.h | 5 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.md | 1 |
3 files changed, 6 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 92e0d2b..0c5d5ae 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -2,8 +2,10 @@ * config/rs6000/rs6000.h (CLZ_DEFINED_VALUE_AT_ZERO): Define. * config/rs6000/rs6000.md (clzsi2): Rename from cntlzw2. + (ctzsi2): New pattern. (ffssi2): Use clz instead of unspec. (clzdi2): Rename from cntlzd2. + (ctzdi2): New pattern. (ffsdi2): Use clz instead of unspec. 2003-02-07 Loren James Rittle <ljrittle@acm.org> diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 31c88a0..1381ca4 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -2270,10 +2270,13 @@ do { \ is done just by pretending it is already truncated. */ #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 -/* The cntlzw and cntlzd instructions return 32 and 64 for zero. */ +/* The cntlzw and cntlzd instructions return 32 and 64 for input of zero. */ #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \ ((VALUE) = ((MODE) == SImode ? 32 : 64)) +/* The CTZ patterns return -1 for input of zero. */ +#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = -1) + /* Specify the machine mode that pointers have. After generation of rtl, the compiler makes no further distinction between pointers and any other objects of this machine mode. */ diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index e4a17cf..142159d 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -36,7 +36,6 @@ ;; 16 macho_correct_pic ;; 19 movesi_from_cr ;; 20 movesi_to_cr -;; 21 cntlz{w,d}2 count lead zero word/double word ;; Define an insn type attribute. This is used in function unit delay ;; computations. |