procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

[nvptx, offloading] Determine default workers at runtime

Browse source 
Currently, if the user doesn't specify the number of workers for an openacc
region, the compiler hardcodes it to a default value.

This patch removes this functionality, such that the libgomp runtime can decide
on a default value.

2018-07-30  Cesar Philippidis  <cesar@codesourcery.com>
	    Tom de Vries  <tdevries@suse.de>

	* config/nvptx/nvptx.c (PTX_GANG_DEFAULT): Rename to ...
	(PTX_DEFAULT_RUNTIME_DIM): ... this.
	(nvptx_goacc_validate_dims): Set default worker and gang dims to
	PTX_DEFAULT_RUNTIME_DIM.
	(nvptx_dim_limit): Ignore GOMP_DIM_WORKER.

Co-Authored-By: Tom de Vries <tdevries@suse.de>

From-SVN: r263060
This commit is contained in:
Cesar Philippidis 2018-07-30 01:16:52 -07:00 • committed by Tom de Vries
parent d634309f9a
commit 605219e7c7
2 changed files with 12 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
gcc/ChangeLog
View file

@ -1,3 +1,12 @@
2018-07-30 Cesar Philippidis <cesar@codesourcery.com>
Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (PTX_GANG_DEFAULT): Rename to ...
(PTX_DEFAULT_RUNTIME_DIM): ... this.
(nvptx_goacc_validate_dims): Set default worker and gang dims to
PTX_DEFAULT_RUNTIME_DIM.
(nvptx_dim_limit): Ignore GOMP_DIM_WORKER.
2018-07-29 John David Anglin <danglin@gcc.gnu.org>
* config/pa/pa.c (pa_output_addr_vec): Align address table.

9
gcc/config/nvptx/nvptx.c
View file

@ -5165,7 +5165,7 @@ nvptx_expand_builtin (tree exp, rtx target, rtx ARG_UNUSED (subtarget),
/* Define dimension sizes for known hardware. */
#define PTX_VECTOR_LENGTH 32
#define PTX_WORKER_LENGTH 32
#define PTX_GANG_DEFAULT 0 /* Defer to runtime. */
#define PTX_DEFAULT_RUNTIME_DIM 0 /* Defer to runtime. */
/* Implement TARGET_SIMT_VF target hook: number of threads in a warp. */
@ -5214,9 +5214,9 @@ nvptx_goacc_validate_dims (tree decl, int dims[], int fn_level)
{
dims[GOMP_DIM_VECTOR] = PTX_VECTOR_LENGTH;
if (dims[GOMP_DIM_WORKER] < 0)
dims[GOMP_DIM_WORKER] = PTX_WORKER_LENGTH;
dims[GOMP_DIM_WORKER] = PTX_DEFAULT_RUNTIME_DIM;
if (dims[GOMP_DIM_GANG] < 0)
dims[GOMP_DIM_GANG] = PTX_GANG_DEFAULT;
dims[GOMP_DIM_GANG] = PTX_DEFAULT_RUNTIME_DIM;
changed = true;
}
@ -5230,9 +5230,6 @@ nvptx_dim_limit (int axis)
{
switch (axis)
{
case GOMP_DIM_WORKER:
return PTX_WORKER_LENGTH;
case GOMP_DIM_VECTOR:
return PTX_VECTOR_LENGTH;