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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* pipeline.h: software pipeline infrastructure
*
* Copyright (c) 2010 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef included_clib_pipeline_h
#define included_clib_pipeline_h
#define clib_pipeline_stage(F,TYPE,ARG,I,BODY) \
always_inline void F##_inline (void * _, u32 I) \
{ TYPE ARG = _; { BODY; } } \
never_inline void F##_no_inline (TYPE ARG, u32 I) \
{ F##_inline (ARG, I); }
#define clib_pipeline_stage_static(F,TYPE,ARG,I,BODY) \
static_always_inline void F##_inline (void * _, u32 I) \
{ TYPE ARG = _; { BODY; } } \
never_inline void F##_no_inline (TYPE ARG, u32 I) \
{ F##_inline (ARG, I); }
#define clib_pipeline_stage_no_inline(F,TYPE,ARG,I,BODY) \
never_inline void F##_no_inline (void * _, u32 I) \
{ TYPE ARG = _; { BODY; } } \
never_inline void F##_inline (TYPE ARG, u32 I) \
{ F##_no_inline (ARG, I); }
#define _clib_pipeline_var(v) _clib_pipeline_##v
#define clib_pipeline_stage_execute(F,A,I,S) \
F##_##S (A, _clib_pipeline_var(i) - (I))
#define clib_pipeline_main_stage(F,A,I) \
clib_pipeline_stage_execute (F, A, I, inline)
#define clib_pipeline_init_stage(F,A,I) \
if (_clib_pipeline_var(i) >= (I)) clib_pipeline_stage_execute (F, A, I, no_inline)
#define clib_pipeline_exit_stage(F,A,I) \
if (_clib_pipeline_var(i) >= (I) && _clib_pipeline_var(i) - (I) < _clib_pipeline_var(n_vectors)) \
clib_pipeline_stage_execute (F, A, I, no_inline)
#define clib_pipeline_init_loop \
for (_clib_pipeline_var(i) = 0; \
_clib_pipeline_var(i) < \
clib_min (_clib_pipeline_var(n_stages) - 1, \
_clib_pipeline_var(n_vectors)); \
_clib_pipeline_var(i)++)
#define clib_pipeline_main_loop \
for (; _clib_pipeline_var(i) < _clib_pipeline_var(n_vectors); \
_clib_pipeline_var(i)++)
#define clib_pipeline_exit_loop \
for (; _clib_pipeline_var(i) < (_clib_pipeline_var(n_vectors) \
+ _clib_pipeline_var(n_stages) - 1); \
_clib_pipeline_var(i)++)
#define clib_pipeline_run_2_stage(N,ARG,STAGE0,STAGE1) \
do { \
uword _clib_pipeline_var(n_vectors) = (N); \
uword _clib_pipeline_var(n_stages) = 2; \
uword _clib_pipeline_var(i); \
\
clib_pipeline_init_loop \
{ \
clib_pipeline_init_stage (STAGE0, ARG, 0); \
} \
\
clib_pipeline_main_loop \
{ \
clib_pipeline_main_stage (STAGE0, ARG, 0); \
clib_pipeline_main_stage (STAGE1, ARG, 1); \
} \
\
clib_pipeline_exit_loop \
{ \
clib_pipeline_exit_stage (STAGE1, ARG, 1); \
} \
} while (0)
#define clib_pipeline_run_3_stage(N,ARG,STAGE0,STAGE1,STAGE2) \
do { \
uword _clib_pipeline_var(n_vectors) = (N); \
uword _clib_pipeline_var(n_stages) = 3; \
uword _clib_pipeline_var(i); \
\
clib_pipeline_init_loop \
{ \
clib_pipeline_init_stage (STAGE0, ARG, 0); \
clib_pipeline_init_stage (STAGE1, ARG, 1); \
} \
\
clib_pipeline_main_loop \
{ \
clib_pipeline_main_stage (STAGE0, ARG, 0); \
clib_pipeline_main_stage (STAGE1, ARG, 1); \
clib_pipeline_main_stage (STAGE2, ARG, 2); \
} \
\
clib_pipeline_exit_loop \
{ \
clib_pipeline_exit_stage (STAGE1, ARG, 1); \
clib_pipeline_exit_stage (STAGE2, ARG, 2); \
} \
} while (0)
#define clib_pipeline_run_4_stage(N,ARG,STAGE0,STAGE1,STAGE2,STAGE3) \
do { \
uword _clib_pipeline_var(n_vectors) = (N); \
uword _clib_pipeline_var(n_stages) = 4; \
uword _clib_pipeline_var(i); \
\
clib_pipeline_init_loop \
{ \
clib_pipeline_init_stage (STAGE0, ARG, 0); \
clib_pipeline_init_stage (STAGE1, ARG, 1); \
clib_pipeline_init_stage (STAGE2, ARG, 2); \
} \
\
clib_pipeline_main_loop \
{ \
clib_pipeline_main_stage (STAGE0, ARG, 0); \
clib_pipeline_main_stage (STAGE1, ARG, 1); \
clib_pipeline_main_stage (STAGE2, ARG, 2); \
clib_pipeline_main_stage (STAGE3, ARG, 3); \
} \
\
clib_pipeline_exit_loop \
{ \
clib_pipeline_exit_stage (STAGE1, ARG, 1); \
clib_pipeline_exit_stage (STAGE2, ARG, 2); \
clib_pipeline_exit_stage (STAGE3, ARG, 3); \
} \
} while (0)
#endif /* included_clib_pipeline_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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