diff options
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 928578b..3764268 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -37,6 +37,8 @@ through the macros defined in the @file{.h} file. * Trampolines:: Code set up at run time to enter a nested function. * Library Calls:: Controlling how library routines are implicitly called. * Addressing Modes:: Defining addressing modes valid for memory operands. +* Vectorization:: Controlling how the vectorizer operates. +* OpenMP and OpenACC:: Defining how OpenMP and OpenACC features should work. * Anchored Addresses:: Defining how @option{-fsection-anchors} should work. * Condition Code:: Defining how insns update the condition code. * Costs:: Defining relative costs of different operations. @@ -1424,10 +1426,10 @@ the smaller of @var{computed} and @code{BIGGEST_ALIGNMENT} @defmac MAX_FIXED_MODE_SIZE An integer expression for the size in bits of the largest integer -machine mode that should actually be used. All integer machine modes of -this size or smaller can be used for structures and unions with the -appropriate sizes. If this macro is undefined, @code{GET_MODE_BITSIZE -(DImode)} is assumed. +machine mode that should actually be used by GCC internally. +All integer machine modes of this size or smaller can be used for +structures and unions with the appropriate sizes. If this macro is +undefined, @code{MAX (BITS_PER_WORD * 2, 64)} is assumed. @end defmac @defmac STACK_SAVEAREA_MODE (@var{save_level}) @@ -6282,6 +6284,10 @@ reciprocal of the machine-specific builtin function @var{fndecl}, or @code{NULL_TREE} if such a function is not available. @end deftypefn +@node Vectorization +@section Vectorization +@cindex Vectorization + @deftypefn {Target Hook} tree TARGET_VECTORIZE_BUILTIN_MASK_FOR_LOAD (void) This hook should return the DECL of a function @var{f} that given an address @var{addr} as an argument returns a mask @var{m} that can be @@ -6513,6 +6519,19 @@ The default is @code{NULL_TREE} which means to not vectorize scatter stores. @end deftypefn +@deftypefn {Target Hook} bool TARGET_VECTORIZE_PREFER_GATHER_SCATTER (machine_mode @var{mode}, int @var{scale}, unsigned int @var{group_size}) +This hook returns TRUE if gather loads or scatter stores are cheaper on +this target than a sequence of elementwise loads or stores. The @var{mode} +and @var{scale} correspond to the @code{gather_load} and +@code{scatter_store} instruction patterns. The @var{group_size} is the +number of scalar elements in each scalar loop iteration that are to be +combined into the vector. +@end deftypefn + +@node OpenMP and OpenACC +@section OpenMP and OpenACC +@cindex OpenMP and OpenACC + @deftypefn {Target Hook} int TARGET_SIMD_CLONE_COMPUTE_VECSIZE_AND_SIMDLEN (struct cgraph_node *@var{}, struct cgraph_simd_clone *@var{}, @var{tree}, @var{int}, @var{bool}) This hook should set @var{vecsize_mangle}, @var{vecsize_int}, @var{vecsize_float} fields in @var{simd_clone} structure pointed by @var{clone_info} argument and also @@ -12862,7 +12881,7 @@ At preset, this feature does not support address spaces. It also requires @code{Pmode} to be the same as @code{ptr_mode}. @end deftypefn -@deftypefn {Target Hook} uint8_t TARGET_MEMTAG_TAG_SIZE () +@deftypefn {Target Hook} uint8_t TARGET_MEMTAG_TAG_BITSIZE () Return the size of a tag (in bits) for this platform. The default returns 8. |