diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 10 | ||||
| -rw-r--r-- | gcc/doc/libgcc.texi | 6 | ||||
| -rw-r--r-- | gcc/doc/rtl.texi | 5 |
3 files changed, 20 insertions, 1 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 422c422..9ec4460 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -6116,6 +6116,16 @@ Similar to @code{__builtin_powi}, except the argument and return types are @code{long double}. @end deftypefn +@deftypefn {Built-in Function} int32_t __builtin_bswap32 (int32_t x) +Returns @var{x} with the order of the bytes reversed; for example, +@code{0xaabbccdd} becomes @code{0xddccbbaa}. Byte here always means +exactly 8 bits. +@end deftypefn + +@deftypefn {Built-in Function} int64_t __builtin_bswap64 (int64_t x) +Similar to @code{__builtin_bswap32}, except the argument and return types +are 64-bit. +@end deftypefn @node Target Builtins @section Built-in Functions Specific to Particular Target Machines diff --git a/gcc/doc/libgcc.texi b/gcc/doc/libgcc.texi index f67b117..fcc55d7 100644 --- a/gcc/doc/libgcc.texi +++ b/gcc/doc/libgcc.texi @@ -212,6 +212,11 @@ These functions return the value zero if the number of bits set in These functions return the number of bits set in @var{a}. @end deftypefn +@deftypefn {Runtime Function} int32_t __bswapsi2 (int32_t @var{a}) +@deftypefnx {Runtime Function} int64_t __bswapdi2 (int64_t @var{a}) +These functions return the @var{a} byteswapped. +@end deftypefn + @node Soft float library routines @section Routines for floating point emulation @cindex soft float library @@ -728,4 +733,3 @@ document me! @deftypefn {Runtime Function} void __clear_cache (char *@var{beg}, char *@var{end}) This function clears the instruction cache between @var{beg} and @var{end}. @end deftypefn - diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 76e8f16..d97b2b3 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -2084,6 +2084,11 @@ mode @var{m}. The mode of @var{x} will usually be an integer mode. Represents the number of 1-bits modulo 2 in @var{x}, represented as an integer of mode @var{m}. The mode of @var{x} will usually be an integer mode. + +@findex bswap +@item (bswap:@var{m} @var{x}) +Represents the value @var{x} with the order of bytes reversed, carried out +in mode @var{m}, which must be a fixed-point machine mode. @end table @node Comparisons |