diff options
| author | Reid Spencer <rspencer@reidspencer.com> | 2007-05-14 16:14:57 +0000 |
|---|---|---|
| committer | Reid Spencer <rspencer@reidspencer.com> | 2007-05-14 16:14:57 +0000 |
| commit | d6a85b54dea3cd7926839b4719957a493f70976f (patch) | |
| tree | 96278e29e573edd1ef800654ade8751760b8c791 | |
| parent | d9efdb2012988b23cb12f1e59144a8119282f94d (diff) | |
Revise definition of part_select. The wrapping behavior is not useful so
in the reverse case the only difference is that the bits are returned in
reverse order.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37035 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/LangRef.html | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 58e0e3c5f3..314cdb98f6 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -4655,16 +4655,11 @@ only the <tt>%hiBit - %loBit</tt> bits set, as follows:</p> <li>A mask of the retained bits is created by shifting a -1 value.</li> <li>The mask is ANDed with <tt>%val</tt> to produce the result. </ol> -<p>In reverse mode, a similar computation is made except that:</p> -<ol> - <li>The bits selected wrap around to include both the highest and lowest bits. - For example, part.select(i16 X, 4, 7) selects bits from X with a mask of - 0x00F0 (forwards case) while part.select(i16 X, 8, 3) selects bits from X - with a mask of 0xFF0F.</li> - <li>The bits returned in the reverse case are reversed. So, if X has the value - 0x6ACF and we apply part.select(i16 X, 8, 3) to it, we get back the value - 0x0A6F.</li> -</ol> +<p>In reverse mode, a similar computation is made except that the bits are +returned in the reverse order. So, for example, if <tt>X</tt> has the value +<tt>i16 0x0ACF (101011001111)</tt> and we apply +<tt>part.select(i16 X, 8, 3)</tt> to it, we get back the value +<tt>i16 0x0026 (000000100110)</tt>.</p> </div> <div class="doc_subsubsection"> |