glibc/benchtests/bench-math-inlines.c

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/* Measure math inline functions.
Copyright (C) 2015-2022 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
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
<https://www.gnu.org/licenses/>. */
#define SIZE 1024
#define TEST_MAIN
#define TEST_NAME "math-inlines"
#define TEST_FUNCTION test_main ()
#include "bench-timing.h"
#include "json-lib.h"
#include "bench-util.h"
#include <stdlib.h>
#include <math.h>
#include <stdint.h>
#define BOOLTEST(func) \
static int __attribute__((noinline)) \
func ## _f (double d, int i) \
{ \
if (func (d)) \
return (int) d + i; \
else \
return 5; \
} \
static int \
func ## _t (volatile double *p, size_t n, size_t iters) \
{ \
int i, j; \
int res = 0; \
for (j = 0; j < iters; j++) \
for (i = 0; i < n; i++) \
if (func ## _f (p[i] * 2.0, i) != 0) \
res += 5; \
return res; \
}
#define VALUETEST(func) \
static int __attribute__((noinline)) \
func ## _f (double d) \
{ \
return func (d); \
} \
static int \
func ## _t (volatile double *p, size_t n, size_t iters) \
{ \
int i, j; \
int res = 0; \
for (j = 0; j < iters; j++) \
for (i = 0; i < n; i++) \
res += func ## _f (p[i] * 2.0); \
return res; \
}
typedef union
{
double value;
uint64_t word;
} ieee_double_shape_type;
#define EXTRACT_WORDS64(i,d) \
do { \
ieee_double_shape_type gh_u; \
gh_u.value = (d); \
(i) = gh_u.word; \
} while (0)
/* Inlines similar to existing math_private.h versions. */
static __always_inline int
__isnan_inl (double d)
{
uint64_t di;
EXTRACT_WORDS64 (di, d);
return (di & 0x7fffffffffffffffull) > 0x7ff0000000000000ull;
}
static __always_inline int
__isinf_ns2 (double d)
{
uint64_t di;
EXTRACT_WORDS64 (di, d);
return (di & 0x7fffffffffffffffull) == 0x7ff0000000000000ull;
}
static __always_inline int
__finite_inl (double d)
{
uint64_t di;
EXTRACT_WORDS64 (di, d);
return (di & 0x7fffffffffffffffull) < 0x7ff0000000000000ull;
}
#define __isnormal_inl(X) (__fpclassify (X) == FP_NORMAL)
/* Inlines for the builtin functions. */
#define __isnan_builtin(X) __builtin_isnan (X)
#define __isinf_ns_builtin(X) __builtin_isinf (X)
#define __isinf_builtin(X) __builtin_isinf_sign (X)
#define __isfinite_builtin(X) __builtin_isfinite (X)
#define __isnormal_builtin(X) __builtin_isnormal (X)
#define __fpclassify_builtin(X) __builtin_fpclassify (FP_NAN, FP_INFINITE, \
FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (X))
static double __attribute ((noinline))
kernel_standard (double x, double y, int z)
{
return x * y + z;
}
volatile double rem1 = 2.5;
static __always_inline double
remainder_test1 (double x)
{
double y = rem1;
if (((__builtin_expect (y == 0.0, 0) && !__isnan_inl (x))
|| (__builtin_expect (__isinf_ns2 (x), 0) && !__isnan_inl (y))))
return kernel_standard (x, y, 10);
return remainder (x, y);
}
static __always_inline double
remainder_test2 (double x)
{
double y = rem1;
if (((__builtin_expect (y == 0.0, 0) && !__builtin_isnan (x))
|| (__builtin_expect (__builtin_isinf (x), 0) && !__builtin_isnan (y))))
return kernel_standard (x, y, 10);
return remainder (x, y);
}
/* Create test functions for each possibility. */
BOOLTEST (__isnan)
BOOLTEST (__isnan_inl)
BOOLTEST (__isnan_builtin)
BOOLTEST (isnan)
BOOLTEST (__isinf)
BOOLTEST (__isinf_builtin)
BOOLTEST (__isinf_ns2)
BOOLTEST (__isinf_ns_builtin)
BOOLTEST (isinf)
BOOLTEST (__finite)
BOOLTEST (__finite_inl)
BOOLTEST (__isfinite_builtin)
BOOLTEST (isfinite)
BOOLTEST (__isnormal_inl)
BOOLTEST (__isnormal_builtin)
BOOLTEST (isnormal)
VALUETEST (__fpclassify)
VALUETEST (__fpclassify_builtin)
VALUETEST (fpclassify)
VALUETEST (remainder_test1)
VALUETEST (remainder_test2)
typedef int (*proto_t) (volatile double *p, size_t n, size_t iters);
typedef struct
{
const char *name;
proto_t fn;
} impl_t;
#define IMPL(name) { #name, name ## _t }
static impl_t test_list[] =
{
IMPL (__isnan),
IMPL (__isnan_inl),
IMPL (__isnan_builtin),
IMPL (isnan),
IMPL (__isinf),
IMPL (__isinf_ns2),
IMPL (__isinf_ns_builtin),
IMPL (__isinf_builtin),
IMPL (isinf),
IMPL (__finite),
IMPL (__finite_inl),
IMPL (__isfinite_builtin),
IMPL (isfinite),
IMPL (__isnormal_inl),
IMPL (__isnormal_builtin),
IMPL (isnormal),
IMPL (__fpclassify),
IMPL (__fpclassify_builtin),
IMPL (fpclassify),
IMPL (remainder_test1),
IMPL (remainder_test2)
};
static void
do_one_test (json_ctx_t *json_ctx, proto_t test_fn, volatile double *arr,
size_t len, const char *testname)
{
size_t iters = 2048;
timing_t start, stop, cur;
json_attr_object_begin (json_ctx, testname);
TIMING_NOW (start);
test_fn (arr, len, iters);
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
json_attr_double (json_ctx, "duration", cur);
json_attr_double (json_ctx, "iterations", iters);
json_attr_double (json_ctx, "mean", cur / iters);
json_attr_object_end (json_ctx);
}
static volatile double arr1[SIZE];
static volatile double arr2[SIZE];
int
test_main (void)
{
json_ctx_t json_ctx;
size_t i;
bench_start ();
json_init (&json_ctx, 2, stdout);
json_attr_object_begin (&json_ctx, TEST_NAME);
/* Create 2 test arrays, one with 10% zeroes, 10% negative values,
79% positive values and 1% infinity/NaN. The other contains
50% inf, 50% NaN. This relies on rand behaving correctly. */
for (i = 0; i < SIZE; i++)
{
int x = rand () & 255;
arr1[i] = (x < 25) ? 0.0 : ((x < 50) ? -1 : 100);
if (x == 255) arr1[i] = __builtin_inf ();
if (x == 254) arr1[i] = __builtin_nan ("0");
arr2[i] = (x < 128) ? __builtin_inf () : __builtin_nan ("0");
}
for (i = 0; i < sizeof (test_list) / sizeof (test_list[0]); i++)
{
json_attr_object_begin (&json_ctx, test_list[i].name);
do_one_test (&json_ctx, test_list[i].fn, arr2, SIZE, "inf/nan");
json_attr_object_end (&json_ctx);
}
for (i = 0; i < sizeof (test_list) / sizeof (test_list[0]); i++)
{
json_attr_object_begin (&json_ctx, test_list[i].name);
do_one_test (&json_ctx, test_list[i].fn, arr1, SIZE, "normal");
json_attr_object_end (&json_ctx);
}
json_attr_object_end (&json_ctx);
return 0;
}
#include "bench-util.c"
#include "../test-skeleton.c"