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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-02-05 00:43:22 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-02-05 00:43:22 +0000 |
| commit | 9acebba82637e1a8e9d0902443f0bf3bd6b70752 (patch) | |
| tree | d1231e617a60d648c24d7aa85f9cab0e22d2276d | |
| parent | f9f21662bd312d87b9d96dcc3a83985ed1b00367 (diff) | |
| download | ppe42-gcc-9acebba82637e1a8e9d0902443f0bf3bd6b70752.tar.gz ppe42-gcc-9acebba82637e1a8e9d0902443f0bf3bd6b70752.zip | |
* libgcc2.c (__paritysi2, __paritydi2): Replace last two reduction
rounds with a "bit table" lookup.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@62421 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/libgcc2.c | 10 |
2 files changed, 9 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index dfafdec874a..17553a395b2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-02-04 Richard Henderson <rth@redhat.com> + + * libgcc2.c (__paritysi2, __paritydi2): Replace last two reduction + rounds with a "bit table" lookup. + 2003-02-04 Ulrich Weigand <uweigand@de.ibm.com> * reload.c (find_reloads): Do not use the mode specified in the insn diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c index a6eb1f09f48..2801681e97f 100644 --- a/gcc/libgcc2.c +++ b/gcc/libgcc2.c @@ -664,9 +664,8 @@ __paritysi2 (USItype x) nx ^= nx >> 16; nx ^= nx >> 8; nx ^= nx >> 4; - nx ^= nx >> 2; - nx ^= nx >> 1; - return nx & 1; + nx &= 0xf; + return (0x6996 >> nx) & 1; } #endif @@ -680,9 +679,8 @@ __paritydi2 (UDItype x) nx ^= nx >> 16; nx ^= nx >> 8; nx ^= nx >> 4; - nx ^= nx >> 2; - nx ^= nx >> 1; - return nx & 1; + nx &= 0xf; + return (0x6996 >> nx) & 1; } #endif |
