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glibc/benchtests/bench-modf.c

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PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
/* Copyright (C) 2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
extern double modf (double, double *);
Allow multiple input domains to be run in the same benchmark program Some math functions have distinct performance characteristics in specific domains of inputs, where some inputs return via a fast path while other inputs require multiple precision calculations, that too at different precision levels. The way to implement different domains was to have a separate source file and benchmark definition, resulting in separate programs. This clutters up the benchmark, so this change allows these domains to be consolidated into the same input file. To do this, the input file format is now enhanced to allow comments with a preceding # and directives with two # at the begining of a line. A directive that looks like: tells the benchmark generation script that what follows is a different domain of inputs. The value of the 'name' directive (in this case, foo) is used in the output. The two input domains are then executed sequentially and their results collated separately. with the above directive, there would be two lines in the result that look like: func(): .... func(foo): ...
2013-04-30 08:47:57 +00:00
#define CALL_BENCH_FUNC(j, i) modf (in[j].arg0, &i);
PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
struct args
{
Prevent optimizing out of benchmark function call Resolves: #15424 The compiler would optimize the benchmark function call out of the loop and call it only once, resulting in blazingly fast times for some benchmarks (notably atan, sin and cos). Mark the inputs as volatile so that the code is forced to read again from the input for each iteration.
2013-05-17 13:40:33 +00:00
volatile double arg0;
PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
} in[] =
{
{ 42.42 },
{ -42.42 }
};
Allow multiple input domains to be run in the same benchmark program Some math functions have distinct performance characteristics in specific domains of inputs, where some inputs return via a fast path while other inputs require multiple precision calculations, that too at different precision levels. The way to implement different domains was to have a separate source file and benchmark definition, resulting in separate programs. This clutters up the benchmark, so this change allows these domains to be consolidated into the same input file. To do this, the input file format is now enhanced to allow comments with a preceding # and directives with two # at the begining of a line. A directive that looks like: tells the benchmark generation script that what follows is a different domain of inputs. The value of the 'name' directive (in this case, foo) is used in the output. The two input domains are then executed sequentially and their results collated separately. with the above directive, there would be two lines in the result that look like: func(): .... func(foo): ...
2013-04-30 08:47:57 +00:00
#define NUM_VARIANTS 1
#define NUM_SAMPLES(v) (sizeof (in) / sizeof (struct args))
PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
static volatile double ret = 0.0;
Allow multiple input domains to be run in the same benchmark program Some math functions have distinct performance characteristics in specific domains of inputs, where some inputs return via a fast path while other inputs require multiple precision calculations, that too at different precision levels. The way to implement different domains was to have a separate source file and benchmark definition, resulting in separate programs. This clutters up the benchmark, so this change allows these domains to be consolidated into the same input file. To do this, the input file format is now enhanced to allow comments with a preceding # and directives with two # at the begining of a line. A directive that looks like: tells the benchmark generation script that what follows is a different domain of inputs. The value of the 'name' directive (in this case, foo) is used in the output. The two input domains are then executed sequentially and their results collated separately. with the above directive, there would be two lines in the result that look like: func(): .... func(foo): ...
2013-04-30 08:47:57 +00:00
#define BENCH_FUNC(v, j) \
({ \
double iptr; \
ret = CALL_BENCH_FUNC (j, iptr); \
})
PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
#define FUNCNAME "modf"
Allow multiple input domains to be run in the same benchmark program Some math functions have distinct performance characteristics in specific domains of inputs, where some inputs return via a fast path while other inputs require multiple precision calculations, that too at different precision levels. The way to implement different domains was to have a separate source file and benchmark definition, resulting in separate programs. This clutters up the benchmark, so this change allows these domains to be consolidated into the same input file. To do this, the input file format is now enhanced to allow comments with a preceding # and directives with two # at the begining of a line. A directive that looks like: tells the benchmark generation script that what follows is a different domain of inputs. The value of the 'name' directive (in this case, foo) is used in the output. The two input domains are then executed sequentially and their results collated separately. with the above directive, there would be two lines in the result that look like: func(): .... func(foo): ...
2013-04-30 08:47:57 +00:00
#define VARIANT(v) FUNCNAME "()"
PowerPC: modf optimization This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
2013-03-25 21:10:06 +00:00
#include "bench-skeleton.c"
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