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| author | Simon Marlow <simonmar@microsoft.com> | 2008-04-07 21:24:37 +0000 |
|---|---|---|
| committer | Simon Marlow <simonmar@microsoft.com> | 2008-04-07 21:24:37 +0000 |
| commit | d7fcc5eb8e926038240078ebfccea05f4f3eb1da (patch) | |
| tree | 727359feb87c2c86cbbc8dfcc1814744b08c4c2d /includes | |
| parent | b95ca692ddc47376b114dee0cf93871661a53358 (diff) | |
| download | haskell-d7fcc5eb8e926038240078ebfccea05f4f3eb1da.tar.gz | |
update a comment
Diffstat (limited to 'includes')
| -rw-r--r-- | includes/Cmm.h | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/includes/Cmm.h b/includes/Cmm.h index d47e6fdaa6..4cfb432811 100644 --- a/includes/Cmm.h +++ b/includes/Cmm.h @@ -102,18 +102,8 @@ #endif /* - * The RTS must UNTAG a pointer before dereferencing it. - * The use of UNTAG follows the following rules of thumb: - * - * - Any pointer might be tagged. - * - Except the pointers that are passed in R1 to RTS functions. - * - R1 is also untagged when entering constructor code. - * - * TODO: - * - * - Remove redundancies of tagging and untagging in code generation. - * - Optimize getTag or dataToTag# ? - * + * The RTS must sometimes UNTAG a pointer before dereferencing it. + * See the wiki page Commentary/Rts/HaskellExecution/PointerTagging */ #define TAG_MASK ((1 << TAG_BITS) - 1) #define UNTAG(p) (p & ~TAG_MASK) |