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poly_int: get_mask_mode

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This patch makes TARGET_GET_MASK_MODE take polynomial nunits and
vector_size arguments.  The gcc_assert in default_get_mask_mode
is now handled by the exact_div call in vector_element_size.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* target.def (get_mask_mode): Take the number of units and length
	as poly_uint64s rather than unsigned ints.
	* targhooks.h (default_get_mask_mode): Update accordingly.
	* targhooks.c (default_get_mask_mode): Likewise.
	* config/i386/i386.c (ix86_get_mask_mode): Likewise.
	* doc/tm.texi: Regenerate.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r256130
This commit is contained in:
Richard Sandiford 2018-01-03 07:14:43 +00:00 • committed by Richard Sandiford
parent 9d2f08ab97
commit 87133c45a0
6 changed files with 19 additions and 8 deletions
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11
gcc/ChangeLog
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@ -1,3 +1,14 @@
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
* target.def (get_mask_mode): Take the number of units and length
as poly_uint64s rather than unsigned ints.
* targhooks.h (default_get_mask_mode): Update accordingly.
* targhooks.c (default_get_mask_mode): Likewise.
* config/i386/i386.c (ix86_get_mask_mode): Likewise.
* doc/tm.texi: Regenerate.
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

2
gcc/config/i386/i386.c
View file

@ -48958,7 +48958,7 @@ ix86_autovectorize_vector_sizes (void)
/* Implemenation of targetm.vectorize.get_mask_mode. */
static opt_machine_mode
ix86_get_mask_mode (unsigned nunits, unsigned vector_size)
ix86_get_mask_mode (poly_uint64 nunits, poly_uint64 vector_size)
{
unsigned elem_size = vector_size / nunits;

2
gcc/doc/tm.texi
View file

@ -5880,7 +5880,7 @@ mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}.
The default is zero which means to not iterate over other vector sizes.
@end deftypefn
@deftypefn {Target Hook} opt_machine_mode TARGET_VECTORIZE_GET_MASK_MODE (unsigned @var{nunits}, unsigned @var{length})
@deftypefn {Target Hook} opt_machine_mode TARGET_VECTORIZE_GET_MASK_MODE (poly_uint64 @var{nunits}, poly_uint64 @var{length})
A vector mask is a value that holds one boolean result for every element
in a vector. This hook returns the machine mode that should be used to
represent such a mask when the vector in question is @var{length} bytes

2
gcc/target.def
View file

@ -1915,7 +1915,7 @@ The default implementation returns the mode of an integer vector that\n\
is @var{length} bytes long and that contains @var{nunits} elements,\n\
if such a mode exists.",
opt_machine_mode,
(unsigned nunits, unsigned length),
(poly_uint64 nunits, poly_uint64 length),
default_get_mask_mode)
/* Target builtin that implements vector gather operation. */

8
gcc/targhooks.c
View file

@ -1290,17 +1290,17 @@ default_autovectorize_vector_sizes (void)
return 0;
}
/* By defaults a vector of integers is used as a mask. */
/* By default a vector of integers is used as a mask. */
opt_machine_mode
default_get_mask_mode (unsigned nunits, unsigned vector_size)
default_get_mask_mode (poly_uint64 nunits, poly_uint64 vector_size)
{
unsigned elem_size = vector_size / nunits;
unsigned int elem_size = vector_element_size (vector_size, nunits);
scalar_int_mode elem_mode
= smallest_int_mode_for_size (elem_size * BITS_PER_UNIT);
machine_mode vector_mode;
gcc_assert (elem_size * nunits == vector_size);
gcc_assert (known_eq (elem_size * nunits, vector_size));
if (mode_for_vector (elem_mode, nunits).exists (&vector_mode)
&& VECTOR_MODE_P (vector_mode)

2
gcc/targhooks.h
View file

@ -109,7 +109,7 @@ default_builtin_support_vector_misalignment (machine_mode mode,
int, bool);
extern machine_mode default_preferred_simd_mode (scalar_mode mode);
extern unsigned int default_autovectorize_vector_sizes (void);
extern opt_machine_mode default_get_mask_mode (unsigned, unsigned);
extern opt_machine_mode default_get_mask_mode (poly_uint64, poly_uint64);
extern void *default_init_cost (struct loop *);
extern unsigned default_add_stmt_cost (void *, int, enum vect_cost_for_stmt,
struct _stmt_vec_info *, int,