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| author | Kevin Ryde <user42@zip.com.au> | 2003-10-21 02:44:51 +0200 |
|---|---|---|
| committer | Kevin Ryde <user42@zip.com.au> | 2003-10-21 02:44:51 +0200 |
| commit | b7c1e64b10f2854aa84ea7a94702820ed83a0f47 (patch) | |
| tree | a5128a3ef08333c2658de25c916a91b61c50e106 /doc/tasks.html | |
| parent | 09a0c8a7bd6e09949d2ed77334285268d0c81dd5 (diff) | |
| download | gmp-b7c1e64b10f2854aa84ea7a94702820ed83a0f47.tar.gz | |
Reword ARM V5 clz, add gcc 3.4 __builtin_clzl.
Diffstat (limited to 'doc/tasks.html')
| -rw-r--r-- | doc/tasks.html | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/tasks.html b/doc/tasks.html index 3062003b9..629013e30 100644 --- a/doc/tasks.html +++ b/doc/tasks.html @@ -293,8 +293,9 @@ MA 02111-1307, USA. making <code>configure</code> choose the slower <code>malloc-reentrant</code> allocation method. Is there a better way? Maybe variable-length arrays per notes below. -<li> ARM: On v5 cpus see if the <code>clz</code> instruction can be used for - <code>count_leading_zeros</code>. +<li> ARM V5: <code>count_leading_zeros</code> can use the <code>clz</code> + instruction. For GCC 3.4 and up, do this via <code>__builtin_clzl</code> + since then gcc knows it's "predicable". <li> Itanium: <code>mpn_hamdist</code> could be put together based on the current <code>mpn_popcount</code>. <li> Itanium: GCC 3.4 introduces <code>__builtin_popcount</code> which can be |