diff options
| author | Bill Schmidt <wschmidt@linux.ibm.com> | 2018-12-18 13:46:10 +0000 |
|---|---|---|
| committer | William Schmidt <wschmidt@gcc.gnu.org> | 2018-12-18 13:46:10 +0000 |
| commit | 34a9bcaf8b71771f93fe1f09e0c060767bcb7601 (patch) | |
| tree | 937714942d38f75c7a3222881fda0c5787c8d4bd | |
| parent | 68d459d955db9c017d948397d70a0f4f03309e93 (diff) | |
| download | gcc-34a9bcaf8b71771f93fe1f09e0c060767bcb7601.zip gcc-34a9bcaf8b71771f93fe1f09e0c060767bcb7601.tar.gz gcc-34a9bcaf8b71771f93fe1f09e0c060767bcb7601.tar.bz2 | |
extend.texi (PowerPC Altivec/VSX Built-in Functions): Describe when a typedef name can be used as the type specifier for a vector type...
2018-12-18 Bill Schmidt <wschmidt@linux.ibm.com>
* doc/extend.texi (PowerPC Altivec/VSX Built-in Functions):
Describe when a typedef name can be used as the type specifier for
a vector type, and when it cannot.
From-SVN: r267232
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/doc/extend.texi | 25 |
2 files changed, 30 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5c8fc7e..7d97a05 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-12-18 Bill Schmidt <wschmidt@linux.ibm.com> + + * doc/extend.texi (PowerPC Altivec/VSX Built-in Functions): + Describe when a typedef name can be used as the type specifier for + a vector type, and when it cannot. + 2018-12-18 Jozef Lawrynowicz <jozef.l@mittosystems.com> * config/msp430/msp430.h: Define TARGET_VTABLE_ENTRY_ALIGN. diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 5d8fc94..1849120 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -16616,7 +16616,30 @@ disabled. To use them, you must include @code{<altivec.h>} instead. @item GCC allows using a @code{typedef} name as the type specifier for a -vector type. +vector type, but only under the following circumstances: + +@itemize @bullet + +@item +When using @code{__vector} instead of @code{vector}; for example, + +@smallexample +typedef signed short int16; +__vector int16 data; +@end smallexample + +@item +When using @code{vector} in keyword-and-predefine mode; for example, + +@smallexample +typedef signed short int16; +vector int16 data; +@end smallexample + +Note that keyword-and-predefine mode is enabled by disabling GNU +extensions (e.g., by using @code{-std=c11}) and including +@code{<altivec.h>}. +@end itemize @item For C, overloaded functions are implemented with macros so the following |