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- Add ctz patterns. 

From-SVN: r62572
This commit is contained in:
David Edelsohn 2003-02-08 03:59:40 +00:00 committed by David Edelsohn
parent d865b1226d
commit 949939097e
3 changed files with 6 additions and 2 deletions
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2
gcc/ChangeLog
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@ -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>

5
gcc/config/rs6000/rs6000.h
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@ -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. */

1
gcc/config/rs6000/rs6000.md
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@ -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.