[v2,1/4] system_data_types.7: Add '__int128'
Commit Message
Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
---
man7/system_data_types.7 | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
@@ -40,6 +40,8 @@ system_data_types \- overview of system data types
.\" * Description (no "Description" header)
.\" A few lines describing the type.
.\"
+.\" * Versions (optional)
+.\"
.\" * Conforming to (see NOTES)
.\" Format: CXY and later; POSIX.1-XXXX and later.
.\"
@@ -48,6 +50,44 @@ system_data_types \- overview of system data types
.\" * Bugs (if any)
.\"
.\" * See also
+.\"------------------------------------- __int128 ---------------------/
+.TP
+.I __int128
+.RS
+.RI [ signed ]
+.I __int128
+.PP
+A signed integer type
+of a fixed width of exactly 128 bits.
+.PP
+When using GCC,
+it is supported only for targets where
+the compiler is able to generate efficient code for 128-bit arithmetic.
+.PP
+Versions:
+GCC 4.6.0 and later.
+.PP
+Conforming to:
+This is a non-standard extension, present in GCC.
+It is not standardized by the C language standard nor POSIX.
+.PP
+Notes:
+This type is available without including any header.
+.PP
+Bugs:
+It is not possible to express an integer constant of type
+.I __int128
+in implementations where
+.I long long
+is less than 128 bits wide.
+.PP
+See also the
+.IR intmax_t ,
+.IR int N _t
+and
+.I unsigned __int128
+types in this page.
+.RE
.\"------------------------------------- aiocb ------------------------/
.TP
.I aiocb