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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
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Jesper Nilsson 2008-02-13 23:32:57 +00:00 committed by Hans-Peter Nilsson
parent 4d85ec3472
commit 2a6627c21d
3 changed files with 15 additions and 6 deletions
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gcc/ChangeLog
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@ -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

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gcc/doc/md.texi
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@ -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.

4
gcc/doc/rtl.texi
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@ -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.