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| author | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-28 00:31:15 +0200 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2020-05-28 00:33:04 +0200 |
| commit | fe7ebef7fe4f9acb79658ed9db0749b07efc3105 (patch) | |
| tree | 073db78f4f756d2542b1bd961c0eb9030a016d22 /gcc/doc | |
| parent | bbaec68c86f8e89a3460cc022c75d4c4179bfb0a (diff) | |
| download | gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.zip gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.tar.gz gcc-fe7ebef7fe4f9acb79658ed9db0749b07efc3105.tar.bz2 | |
Add support for __builtin_bswap128
This patch introduces a new builtin named __builtin_bswap128 on targets
where TImode is supported, i.e. 64-bit targets only in practice. The
implementation simply reuses the existing double word path in optab, so
no routine is added to libgcc (which means that you get two calls to
_bswapdi2 in the worst case).
gcc/ChangeLog:
* builtin-types.def (BT_UINT128): New primitive type.
(BT_FN_UINT128_UINT128): New function type.
* builtins.def (BUILT_IN_BSWAP128): New GCC builtin.
* doc/extend.texi (__builtin_bswap128): Document it.
* builtins.c (expand_builtin): Deal with BUILT_IN_BSWAP128.
(is_inexpensive_builtin): Likewise.
* fold-const-call.c (fold_const_call_ss): Likewise.
* fold-const.c (tree_call_nonnegative_warnv_p): Likewise.
* tree-ssa-ccp.c (evaluate_stmt): Likewise.
* tree-vect-stmts.c (vect_get_data_ptr_increment): Likewise.
(vectorizable_call): Likewise.
* optabs.c (expand_unop): Always use the double word path for it.
* tree-core.h (enum tree_index): Add TI_UINT128_TYPE.
* tree.h (uint128_type_node): New global type.
* tree.c (build_common_tree_nodes): Build it if TImode is supported.
gcc/testsuite/ChangeLog:
* gcc.dg/builtin-bswap-10.c: New test.
* gcc.dg/builtin-bswap-11.c: Likewise.
* gcc.dg/builtin-bswap-12.c: Likewise.
* gcc.target/i386/builtin-bswap-5.c: Likewise.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index a2ebef8..cced19d 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -13784,14 +13784,20 @@ exactly 8 bits. @deftypefn {Built-in Function} uint32_t __builtin_bswap32 (uint32_t x) Similar to @code{__builtin_bswap16}, except the argument and return types -are 32 bit. +are 32-bit. @end deftypefn @deftypefn {Built-in Function} uint64_t __builtin_bswap64 (uint64_t x) Similar to @code{__builtin_bswap32}, except the argument and return types -are 64 bit. +are 64-bit. @end deftypefn +@deftypefn {Built-in Function} uint128_t __builtin_bswap128 (uint128_t x) +Similar to @code{__builtin_bswap64}, except the argument and return types +are 128-bit. Only supported on targets when 128-bit types are supported. +@end deftypefn + + @deftypefn {Built-in Function} Pmode __builtin_extend_pointer (void * x) On targets where the user visible pointer size is smaller than the size of an actual hardware address this function returns the extended user |