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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-11-11 11:23:02 -0200
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-11-11 11:24:07 -0200
commit450a2e2d19bcf668b44778edef55c11d98aad2c6 (patch)
treefd2057cf8a6b1e7dc4c1c126845224ee862791de /benchtests
parent8ec3f656d6edf6f16216105131fc8b0542216a5b (diff)
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benchtests: Add strtod benchmark
Diffstat (limited to 'benchtests')
-rw-r--r--benchtests/Makefile4
-rw-r--r--benchtests/bench-strtod.c117
2 files changed, 120 insertions, 1 deletions
diff --git a/benchtests/Makefile b/benchtests/Makefile
index aec395a814..5eb65e55f4 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -32,7 +32,9 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
string-bench-ifunc := $(addsuffix -ifunc, $(string-bench))
string-bench-all := $(string-bench) $(string-bench-ifunc)
-benchset := $(string-bench-all)
+stdlib-bench := strtod
+
+benchset := $(string-bench-all) $(stdlib-bench)
LDLIBS-bench-acos = -lm
LDLIBS-bench-acosh = -lm
diff --git a/benchtests/bench-strtod.c b/benchtests/bench-strtod.c
new file mode 100644
index 0000000000..3a8a65fadf
--- /dev/null
+++ b/benchtests/bench-strtod.c
@@ -0,0 +1,117 @@
+/* Measure strtod implementation.
+ 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/>. */
+
+#define TEST_MAIN
+#define TEST_NAME "strtod"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "bench-timing.h"
+
+#undef INNER_LOOP_ITERS
+#define INNER_LOOP_ITERS 65536
+
+static const char *inputs[] =
+{
+ "1e308",
+ "100000000e300",
+ "0x1p1023",
+ "0x1000p1011",
+ "0x1p1020",
+ "0x0.00001p1040" "1e-307",
+ "0.000001e-301",
+ "0.0000001e-300",
+ "0.00000001e-299",
+ "1000000e-313",
+ "10000000e-314",
+ "100000000e-315",
+ "0x1p-1021",
+ "0x1000p-1033",
+ "0x10000p-1037",
+ "0x0.001p-1009",
+ "0x0.0001p-1005",
+ "12.345",
+ "12.345e19",
+ "-.1e+9",
+ ".125",
+ "1e20",
+ "0e-19",
+ "4\00012",
+ "5.9e-76",
+ "0x1.4p+3",
+ "0xAp0",
+ "0x0Ap0",
+ "0x0A",
+ "0xA0",
+ "0x0.A0p8",
+ "0x0.50p9",
+ "0x0.28p10",
+ "0x0.14p11",
+ "0x0.0A0p12",
+ "0x0.050p13",
+ "0x0.028p14",
+ "0x0.014p15",
+ "0x00.00A0p16",
+ "0x00.0050p17",
+ "0x00.0028p18",
+ "0x00.0014p19",
+ "0x1p-1023",
+ "0x0.8p-1022",
+ "Inf",
+ "-Inf",
+ "+InFiNiTy",
+ "0x80000Ap-23",
+ "1e-324",
+ "0x100000000000008p0",
+ "0x100000000000008.p0",
+ "0x100000000000008.00p0",
+ "0x10000000000000800p0",
+ "0x10000000000000801p0",
+ NULL
+};
+
+int
+do_bench (void)
+{
+ const size_t iters = INNER_LOOP_ITERS;
+ timing_t res __attribute__ ((unused));
+
+ TIMING_INIT (res);
+
+ for (size_t i = 0; inputs[i] != NULL; ++i)
+ {
+ char *ep;
+ timing_t start, stop, cur;
+
+ printf ("Input %-24s:", inputs[i]);
+ TIMING_NOW (start);
+ for (size_t j = 0; j < iters; ++j)
+ strtod (inputs[i], &ep);
+ TIMING_NOW (stop);
+
+ TIMING_DIFF (cur, start, stop);
+ TIMING_PRINT_MEAN ((double) cur, (double) iters);
+ putchar ('\n');
+ }
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_bench ()
+
+#include "../test-skeleton.c"