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-rw-r--r--benchtests/bench-math-inlines.c285
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diff --git a/benchtests/bench-math-inlines.c b/benchtests/bench-math-inlines.c
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+/* Measure math inline functions.
+ Copyright (C) 2015 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/>. */
+
+#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 = 500;
+ 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"
generated by cgit v1.1 at 2024-12-21 05:43:46 +0000