Add regression tests for ilogb{,f,l}().

tools/regression/lib/msun/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-TESTS=	test-fenv
+TESTS=	test-fenv test-ilogb
 CFLAGS+= -O0 -lm
 ARCH!=	uname -m
 .if ${ARCH} == "alpha"

tools/regression/lib/msun/test-ilogb.c

@@ -0,0 +1,82 @@
+/*-
+ * Copyright (c) 2004 Stefan Farfeleder
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <assert.h>
+#include <float.h>
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(void)
+{
+	char buf[128], *end;
+	double d;
+	float f;
+	long double ld;
+	int e, i;
+
+	assert(ilogb(0) == FP_ILOGB0);
+	assert(ilogb(NAN) == FP_ILOGBNAN);
+	assert(ilogb(INFINITY) == INT_MAX);
+	for (e = DBL_MIN_EXP - DBL_MANT_DIG; e < DBL_MAX_EXP; e++) {
+		snprintf(buf, sizeof(buf), "0x1.p%d", e);
+		d = strtod(buf, &end);
+		assert(*end == '\0');
+		i = ilogb(d);
+		assert(i == e);
+	}
+	printf("PASS ilogb\n");
+
+	assert(ilogbf(0) == FP_ILOGB0);
+	assert(ilogbf(NAN) == FP_ILOGBNAN);
+	assert(ilogbf(INFINITY) == INT_MAX);
+	for (e = FLT_MIN_EXP - FLT_MANT_DIG; e < FLT_MAX_EXP; e++) {
+		snprintf(buf, sizeof(buf), "0x1.p%d", e);
+		f = strtof(buf, &end);
+		assert(*end == '\0');
+		i = ilogbf(f);
+		assert(i == e);
+	}
+	printf("PASS ilogbf\n");
+
+	assert(ilogbl(0) == FP_ILOGB0);
+	assert(ilogbl(NAN) == FP_ILOGBNAN);
+	assert(ilogbl(INFINITY) == INT_MAX);
+	for (e = LDBL_MIN_EXP - LDBL_MANT_DIG; e < LDBL_MAX_EXP; e++) {
+		snprintf(buf, sizeof(buf), "0x1.p%d", e);
+		ld = strtold(buf, &end);
+		assert(*end == '\0');
+		i = ilogbl(ld);
+		assert(i == e);
+	}
+	printf("PASS ilogbl\n");
+
+	return (0);
+}