* tests/test-modf.h: New file.
* tests/test-modf.c: Include <float.h> and test-modf.h.
(main): Invoke test_function.
* tests/test-modff.c: Include <float.h> and test-modf.h.
(main): Invoke test_function.
* tests/test-modfl.c: Include <float.h> and test-modf.h.
(main): Invoke test_function.
* modules/modf-tests (Files): Add tests/test-modf.h, tests/randomd.c.
(Makefile.am): Add randomd.c to test_modf_SOURCES.
* modules/modff-tests (Files): Add tests/test-modf.h, tests/randomf.c.
(Makefile.am): Add randomf.c to test_modff_SOURCES.
* modules/modfl-tests (Files): Add tests/test-modf.h, tests/randoml.c.
(Depends-on): Add 'float'.
(Makefile.am): Add randoml.c to test_modfl_SOURCES.
+2012-03-03 Bruno Haible <bruno@clisp.org>
+
+ modf* tests: More tests.
+ * tests/test-modf.h: New file.
+ * tests/test-modf.c: Include <float.h> and test-modf.h.
+ (main): Invoke test_function.
+ * tests/test-modff.c: Include <float.h> and test-modf.h.
+ (main): Invoke test_function.
+ * tests/test-modfl.c: Include <float.h> and test-modf.h.
+ (main): Invoke test_function.
+ * modules/modf-tests (Files): Add tests/test-modf.h, tests/randomd.c.
+ (Makefile.am): Add randomd.c to test_modf_SOURCES.
+ * modules/modff-tests (Files): Add tests/test-modf.h, tests/randomf.c.
+ (Makefile.am): Add randomf.c to test_modff_SOURCES.
+ * modules/modfl-tests (Files): Add tests/test-modf.h, tests/randoml.c.
+ (Depends-on): Add 'float'.
+ (Makefile.am): Add randoml.c to test_modfl_SOURCES.
+
2012-03-03 Bruno Haible <bruno@clisp.org>
fabs* tests: More tests.
Files:
tests/test-modf.c
+tests/test-modf.h
tests/signature.h
tests/macros.h
+tests/randomd.c
Depends-on:
Makefile.am:
TESTS += test-modf
check_PROGRAMS += test-modf
+test_modf_SOURCES = test-modf.c randomd.c
test_modf_LDADD = $(LDADD) @MODF_LIBM@
Files:
tests/test-modff.c
+tests/test-modf.h
tests/signature.h
tests/macros.h
+tests/randomf.c
Depends-on:
Makefile.am:
TESTS += test-modff
check_PROGRAMS += test-modff
+test_modff_SOURCES = test-modff.c randomf.c
test_modff_LDADD = $(LDADD) @MODFF_LIBM@
Files:
tests/test-modfl.c
+tests/test-modf.h
tests/signature.h
tests/macros.h
+tests/randoml.c
Depends-on:
fpucw
+float
configure.ac:
Makefile.am:
TESTS += test-modfl
check_PROGRAMS += test-modfl
+test_modfl_SOURCES = test-modfl.c randoml.c
test_modfl_LDADD = $(LDADD) @MODFL_LIBM@
#include "signature.h"
SIGNATURE_CHECK (modf, double, (double, double *));
+#include <float.h>
+
#include "macros.h"
-volatile double x;
-double y;
-double z;
+#define DOUBLE double
+#define L_(literal) literal
+#define MANT_DIG DBL_MANT_DIG
+#define MODF modf
+#define RANDOM randomd
+#include "test-modf.h"
int
main ()
ASSERT (y >= -0.972406761 && y <= -0.972406759);
ASSERT (z == -5.0);
+ test_function ();
+
return 0;
}
--- /dev/null
+/* Test of modf*() function family.
+ Copyright (C) 2012 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+static void
+test_function (void)
+{
+ int i;
+ const DOUBLE TWO_MANT_DIG =
+ /* Assume MANT_DIG <= 5 * 31.
+ Use the identity
+ n = floor(n/5) + floor((n+1)/5) + ... + floor((n+4)/5). */
+ (DOUBLE) (1U << ((MANT_DIG - 1) / 5))
+ * (DOUBLE) (1U << ((MANT_DIG - 1 + 1) / 5))
+ * (DOUBLE) (1U << ((MANT_DIG - 1 + 2) / 5))
+ * (DOUBLE) (1U << ((MANT_DIG - 1 + 3) / 5))
+ * (DOUBLE) (1U << ((MANT_DIG - 1 + 4) / 5));
+
+ /* Randomized tests. */
+ for (i = 0; i < SIZEOF (RANDOM); i++)
+ {
+ DOUBLE x = RANDOM[i]; /* 0.0 <= x < 1.0 */
+ DOUBLE y;
+ DOUBLE z;
+
+ y = MODF (x, &z);
+ ASSERT (z == L_(0.0));
+ ASSERT (y == x);
+
+ y = MODF (- x, &z);
+ ASSERT (z == L_(0.0));
+ ASSERT (y == - x);
+
+ y = MODF (L_(1.0) + x, &z);
+ ASSERT (z == L_(1.0));
+ y -= x;
+ ASSERT (y >= - L_(1.0) / TWO_MANT_DIG);
+ ASSERT (y <= L_(1.0) / TWO_MANT_DIG);
+
+ y = MODF (- L_(1.0) - x, &z);
+ ASSERT (z == - L_(1.0));
+ y -= - x;
+ ASSERT (y >= - L_(1.0) / TWO_MANT_DIG);
+ ASSERT (y <= L_(1.0) / TWO_MANT_DIG);
+ }
+}
+
+volatile DOUBLE x;
+DOUBLE y;
+DOUBLE z;
#include "signature.h"
SIGNATURE_CHECK (modff, float, (float, float *));
+#include <float.h>
+
#include "macros.h"
-volatile float x;
-float y;
-float z;
+#define DOUBLE float
+#define L_(literal) literal##f
+#define MANT_DIG FLT_MANT_DIG
+#define MODF modff
+#define RANDOM randomf
+#include "test-modf.h"
int
main ()
ASSERT (y >= -0.972408f && y <= -0.972406f);
ASSERT (z == -5.0f);
+ test_function ();
+
return 0;
}
#include "signature.h"
SIGNATURE_CHECK (modfl, long double, (long double, long double *));
+#include <float.h>
+
#include "fpucw.h"
#include "macros.h"
-volatile long double x;
-long double y;
-long double z;
+#define DOUBLE long double
+#define L_(literal) literal##L
+#define MANT_DIG LDBL_MANT_DIG
+#define MODF modfl
+#define RANDOM randoml
+#include "test-modf.h"
int
main ()
ASSERT (y >= -0.972406761L && y <= -0.972406759L);
ASSERT (z == -5.0L);
+ test_function ();
+
return 0;
}