diff options
| author | David Edelsohn <edelsohn@gnu.org> | 2003-02-08 03:59:40 +0000 |
|---|---|---|
| committer | David Edelsohn <dje@gcc.gnu.org> | 2003-02-07 22:59:40 -0500 |
| commit | 949939097efb6c39e6746dd10f77f959c23da70b (patch) | |
| tree | 231101e6f2a040d631f8122c909ac49f8149cbbc /gcc | |
| parent | d865b1226d3edfe48b70f79e3910dc90a9429ad8 (diff) | |
| download | gcc-949939097efb6c39e6746dd10f77f959c23da70b.zip gcc-949939097efb6c39e6746dd10f77f959c23da70b.tar.gz gcc-949939097efb6c39e6746dd10f77f959c23da70b.tar.bz2 | |
- Add ctz patterns.
From-SVN: r62572
Diffstat (limited to 'gcc')
| -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. |