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author | Jesper Nilsson <jesper.nilsson@axis.com> | 2008-02-13 23:32:57 +0000 |
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committer | Hans-Peter Nilsson <hp@gcc.gnu.org> | 2008-02-13 23:32:57 +0000 |
commit | 2a6627c21d96c41e27f727673548807a58369c90 (patch) | |
tree | 26a7675af96ece0f5fbd08271ab095795d033118 /gcc | |
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')
-rw-r--r-- | gcc/ChangeLog | 5 | ||||
-rw-r--r-- | gcc/doc/md.texi | 12 | ||||
-rw-r--r-- | gcc/doc/rtl.texi | 4 |
3 files changed, 15 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6d4eb6e..34a0616 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2008-02-14 Jesper Nilsson <jesper.nilsson@axis.com> + + * doc/md.texi (clz, ctz): Add reference. + * doc/rtl.texi (clz, ctz): Likewise. + 2008-02-13 Ralf Wildenhues <Ralf.Wildenhues@gmx.de> PR other/35148 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. diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index bd0effe..f470745 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -2218,7 +2218,7 @@ valid. Represents the number of leading 0-bits in @var{x}, represented as an integer of mode @var{m}, starting at the most significant bit position. If @var{x} is zero, the value is determined by -@code{CLZ_DEFINED_VALUE_AT_ZERO}. Note that this is one of +@code{CLZ_DEFINED_VALUE_AT_ZERO} (@pxref{Misc}). Note that this is one of the few expressions that is not invariant under widening. The mode of @var{x} will usually be an integer mode. @@ -2227,7 +2227,7 @@ the few expressions that is not invariant under widening. The mode of Represents the number of trailing 0-bits in @var{x}, represented as an integer of mode @var{m}, starting at the least significant bit position. If @var{x} is zero, the value is determined by -@code{CTZ_DEFINED_VALUE_AT_ZERO}. Except for this case, +@code{CTZ_DEFINED_VALUE_AT_ZERO} (@pxref{Misc}). Except for this case, @code{ctz(x)} is equivalent to @code{ffs(@var{x}) - 1}. The mode of @var{x} will usually be an integer mode. |