diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 16 | ||||
| -rw-r--r-- | gcc/doc/rtl.texi | 8 |
2 files changed, 24 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 41c326b7b3a..2d9c689f98f 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -7828,6 +7828,12 @@ Returns 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. @end deftypefn +@deftypefn {Built-in Function} int __builtin_clrsb (int x) +Returns the number of leading redundant sign bits in @var{x}, i.e. the +number of bits following the most significant bit which are identical +to it. There are no special cases for 0 or other values. +@end deftypefn + @deftypefn {Built-in Function} int __builtin_popcount (unsigned int x) Returns the number of 1-bits in @var{x}. @end deftypefn @@ -7852,6 +7858,11 @@ Similar to @code{__builtin_ctz}, except the argument type is @code{unsigned long}. @end deftypefn +@deftypefn {Built-in Function} int __builtin_clrsbl (long) +Similar to @code{__builtin_clrsb}, except the argument type is +@code{long}. +@end deftypefn + @deftypefn {Built-in Function} int __builtin_popcountl (unsigned long) Similar to @code{__builtin_popcount}, except the argument type is @code{unsigned long}. @@ -7877,6 +7888,11 @@ Similar to @code{__builtin_ctz}, except the argument type is @code{unsigned long long}. @end deftypefn +@deftypefn {Built-in Function} int __builtin_clrsbll (long long) +Similar to @code{__builtin_clrsb}, except the argument type is +@code{long long}. +@end deftypefn + @deftypefn {Built-in Function} int __builtin_popcountll (unsigned long long) Similar to @code{__builtin_popcount}, except the argument type is @code{unsigned long long}. diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 6995a293c6c..ea30e38032e 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -2400,6 +2400,14 @@ zero if @var{x} is zero.) The mode of @var{x} need not be @var{m}; depending on the target machine, various mode combinations may be valid. +@findex clrsb +@item (clrsb:@var{m} @var{x}) +Represents the number of redundant leading sign bits in @var{x}, +represented as an integer of mode @var{m}, starting at the most +significant bit position. This is one less than the number of leading +sign bits (either 0 or 1), with no special cases. The mode of @var{x} +will usually be an integer mode and may differ from @var{m}. + @findex clz @item (clz:@var{m} @var{x}) Represents the number of leading 0-bits in @var{x}, represented as an |