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| author | Jesper Nilsson <jesper.nilsson@axis.com> | 2008-02-13 23:32:57 +0000 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@gcc.gnu.org> | 2008-02-13 23:32:57 +0000 |
| commit | 2a6627c21d96c41e27f727673548807a58369c90 (patch) | |
| tree | 26a7675af96ece0f5fbd08271ab095795d033118 /gcc/doc/md.texi | |
| parent | 4d85ec3472d6149912717f657cc29f19fe059a91 (diff) | |
| download | gcc-2a6627c21d96c41e27f727673548807a58369c90.zip gcc-2a6627c21d96c41e27f727673548807a58369c90.tar.gz gcc-2a6627c21d96c41e27f727673548807a58369c90.tar.bz2 | |
md.texi (clz, ctz): Add reference.
2008-02-14 Jesper Nilsson <jesper.nilsson@axis.com>
* doc/md.texi (clz, ctz): Add reference.
* doc/rtl.texi (clz, ctz): Likewise.
From-SVN: r132301
Diffstat (limited to 'gcc/doc/md.texi')
| -rw-r--r-- | gcc/doc/md.texi | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 540efd4..93ff187 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -4058,16 +4058,20 @@ corresponds to the C data type @code{int}. @cindex @code{clz@var{m}2} instruction pattern @item @samp{clz@var{m}2} Store into operand 0 the number of leading 0-bits in @var{x}, starting -at the most significant bit position. If @var{x} is 0, the result is -undefined. @var{m} is the mode of operand 0; operand 1's mode is +at the most significant bit position. If @var{x} is 0, the +@code{CLZ_DEFINED_VALUE_AT_ZERO} (@pxref{Misc}) macro defines if +the result is undefined or has a useful value. +@var{m} is the mode of operand 0; operand 1's mode is specified by the instruction pattern, and the compiler will convert the operand to that mode before generating the instruction. @cindex @code{ctz@var{m}2} instruction pattern @item @samp{ctz@var{m}2} Store into operand 0 the number of trailing 0-bits in @var{x}, starting -at the least significant bit position. If @var{x} is 0, the result is -undefined. @var{m} is the mode of operand 0; operand 1's mode is +at the least significant bit position. If @var{x} is 0, the +@code{CTZ_DEFINED_VALUE_AT_ZERO} (@pxref{Misc}) macro defines if +the result is undefined or has a useful value. +@var{m} is the mode of operand 0; operand 1's mode is specified by the instruction pattern, and the compiler will convert the operand to that mode before generating the instruction. |