Introduce a few c99 functions: {l,ll}{rint,round}{,f}. From NetBSD via

jason@. Man page fixes by jmc@, prodding by jsg@. ok mickey@

8 files changed, 412 insertions, 0 deletions

diff --git a/lib/libm/src/llrint.c b/lib/libm/src/llrint.c
new file mode 100644
index 00000000000..c92da9e3c7d
--- /dev/null
+++ b/lib/libm/src/llrint.c
@@ -0,0 +1,14 @@
+/*	$OpenBSD: llrint.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: llrint.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*
+ * Written by Matthias Drochner <drochner@NetBSD.org>.
+ * Public domain.
+ */
+
+#define LRINTNAME llrint
+#define RESTYPE long long int
+#define RESTYPE_MIN LLONG_MIN
+#define RESTYPE_MAX LLONG_MAX
+
+#include "lrint.c"
diff --git a/lib/libm/src/llrintf.c b/lib/libm/src/llrintf.c
new file mode 100644
index 00000000000..2a242afb13d
--- /dev/null
+++ b/lib/libm/src/llrintf.c
@@ -0,0 +1,14 @@
+/*	$OpenBSD: llrintf.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: llrintf.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*
+ * Written by Matthias Drochner <drochner@NetBSD.org>.
+ * Public domain.
+ */
+
+#define LRINTNAME llrintf
+#define RESTYPE long long int
+#define RESTYPE_MIN LLONG_MIN
+#define RESTYPE_MAX LLONG_MAX
+
+#include "lrintf.c"
diff --git a/lib/libm/src/llround.c b/lib/libm/src/llround.c
new file mode 100644
index 00000000000..b52c02c3291
--- /dev/null
+++ b/lib/libm/src/llround.c
@@ -0,0 +1,14 @@
+/*	$OpenBSD: llround.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: llround.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*
+ * Written by Matthias Drochner <drochner@NetBSD.org>.
+ * Public domain.
+ */
+
+#define LROUNDNAME llround
+#define RESTYPE long long int
+#define RESTYPE_MIN LLONG_MIN
+#define RESTYPE_MAX LLONG_MAX
+
+#include "lround.c"
diff --git a/lib/libm/src/llroundf.c b/lib/libm/src/llroundf.c
new file mode 100644
index 00000000000..24ab53cd813
--- /dev/null
+++ b/lib/libm/src/llroundf.c
@@ -0,0 +1,14 @@
+/*	$OpenBSD: llroundf.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: llroundf.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*
+ * Written by Matthias Drochner <drochner@NetBSD.org>.
+ * Public domain.
+ */
+
+#define LROUNDNAME llroundf
+#define RESTYPE long long int
+#define RESTYPE_MIN LLONG_MIN
+#define RESTYPE_MAX LLONG_MAX
+
+#include "lroundf.c"
diff --git a/lib/libm/src/lrint.c b/lib/libm/src/lrint.c
new file mode 100644
index 00000000000..146bc81b10f
--- /dev/null
+++ b/lib/libm/src/lrint.c
@@ -0,0 +1,95 @@
+/*	$OpenBSD: lrint.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: lrint.c,v 1.3 2004/10/13 15:18:32 drochner Exp $ */
+
+/*-
+ * Copyright (c) 2004
+ *	Matthias Drochner. 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.
+ */
+
+#include <sys/types.h>
+#include <sys/limits.h>
+#include <math.h>
+#include <ieeefp.h>
+#include <machine/ieee.h>
+#include "math_private.h"
+
+#ifndef LRINTNAME
+#define LRINTNAME lrint
+#define RESTYPE long int
+#define RESTYPE_MIN LONG_MIN
+#define RESTYPE_MAX LONG_MAX
+#endif
+
+#define RESTYPE_BITS (sizeof(RESTYPE) * 8)
+
+static const double
+TWO52[2]={
+  4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
+ -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
+};
+
+RESTYPE
+LRINTNAME(double x)
+{
+	u_int32_t i0, i1;
+	int e, s, shift;
+	RESTYPE res;
+
+	GET_HIGH_WORD(i0, x);
+	e = i0 >> 20;
+	s = e >> DBL_EXPBITS;
+	e = (e & 0x7ff) - DBL_EXP_BIAS;
+
+	/* 1.0 x 2^-1 is the smallest number which can be rounded to 1 */
+	if (e < -1)
+		return (0);
+	/* 1.0 x 2^31 (or 2^63) is already too large */
+	if (e >= (int)RESTYPE_BITS - 1)
+		return (s ? RESTYPE_MIN : RESTYPE_MAX); /* ??? unspecified */
+
+	/* >= 2^52 is already an exact integer */
+	if (e < DBL_FRACBITS) {
+		/* round, using current direction */
+		x += TWO52[s];
+		x -= TWO52[s];
+	}
+
+	EXTRACT_WORDS(i0, i1, x);
+	e = ((i0 >> 20) & 0x7ff) - DBL_EXP_BIAS;
+	i0 &= 0xfffff;
+	i0 |= (1 << 20);
+
+	shift = e - DBL_FRACBITS;
+	if (shift >=0)
+		res = (shift < 32 ? (RESTYPE)i1 << shift : 0);
+	else
+		res = (shift > -32 ? i1 >> -shift : 0);
+	shift += 32;
+	if (shift >=0)
+		res |= (shift < 32 ? (RESTYPE)i0 << shift : 0);
+	else
+		res |= (shift > -32 ? i0 >> -shift : 0);
+
+	return (s ? -res : res);
+}
diff --git a/lib/libm/src/lrintf.c b/lib/libm/src/lrintf.c
new file mode 100644
index 00000000000..18027152ba4
--- /dev/null
+++ b/lib/libm/src/lrintf.c
@@ -0,0 +1,90 @@
+/*	$OpenBSD: lrintf.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: lrintf.c,v 1.3 2004/10/13 15:18:32 drochner Exp $ */
+
+/*-
+ * Copyright (c) 2004
+ *	Matthias Drochner. 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.
+ */
+
+#include <sys/types.h>
+#include <sys/limits.h>
+#include <math.h>
+#include <ieeefp.h>
+#include <machine/ieee.h>
+#include "math_private.h"
+
+#ifndef LRINTNAME
+#define LRINTNAME lrintf
+#define RESTYPE long int
+#define RESTYPE_MIN LONG_MIN
+#define RESTYPE_MAX LONG_MAX
+#endif
+
+#define RESTYPE_BITS (sizeof(RESTYPE) * 8)
+
+static const float
+TWO23[2]={
+  8.3886080000e+06, /* 0x4b000000 */
+ -8.3886080000e+06, /* 0xcb000000 */
+};
+
+RESTYPE
+LRINTNAME(float x)
+{
+	u_int32_t i0;
+	int e, s, shift;
+	RESTYPE res;
+
+	GET_FLOAT_WORD(i0, x);
+	e = i0 >> SNG_FRACBITS;
+	s = e >> SNG_EXPBITS;
+	e = (e & 0xff) - SNG_EXP_BIAS;
+
+	/* 1.0 x 2^-1 is the smallest number which can be rounded to 1 */
+	if (e < -1)
+		return (0);
+	/* 1.0 x 2^31 (or 2^63) is already too large */
+	if (e >= (int)RESTYPE_BITS - 1)
+		return (s ? RESTYPE_MIN : RESTYPE_MAX); /* ??? unspecified */
+
+	/* >= 2^23 is already an exact integer */
+	if (e < SNG_FRACBITS) {
+		/* round, using current direction */
+		x += TWO23[s];
+		x -= TWO23[s];
+	}
+
+	GET_FLOAT_WORD(i0, x);
+	e = ((i0 >> SNG_FRACBITS) & 0xff) - SNG_EXP_BIAS;
+	i0 &= 0x7fffff;
+	i0 |= (1 << SNG_FRACBITS);
+
+	shift = e - SNG_FRACBITS;
+	if (shift >=0)
+		res = (shift < 32 ? (RESTYPE)i0 << shift : 0);
+	else
+		res = (shift > -32 ? i0 >> -shift : 0);
+
+	return (s ? -res : res);
+}
diff --git a/lib/libm/src/lround.c b/lib/libm/src/lround.c
new file mode 100644
index 00000000000..62fbe3ebea3
--- /dev/null
+++ b/lib/libm/src/lround.c
@@ -0,0 +1,88 @@
+/*	$OpenBSD: lround.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: lround.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*-
+ * Copyright (c) 2004
+ *	Matthias Drochner. 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.
+ */
+
+#include <sys/types.h>
+#include <sys/limits.h>
+#include <math.h>
+#include <ieeefp.h>
+#include <machine/ieee.h>
+#include "math_private.h"
+
+#ifndef LROUNDNAME
+#define LROUNDNAME lround
+#define RESTYPE long int
+#define RESTYPE_MIN LONG_MIN
+#define RESTYPE_MAX LONG_MAX
+#endif
+
+#define RESTYPE_BITS (sizeof(RESTYPE) * 8)
+
+RESTYPE
+LROUNDNAME(double x)
+{
+	u_int32_t i0, i1;
+	int e, s, shift;
+	RESTYPE res;
+
+	GET_HIGH_WORD(i0, x);
+	e = i0 >> 20;
+	s = e >> DBL_EXPBITS;
+	e = (e & 0x7ff) - DBL_EXP_BIAS;
+
+	/* 1.0 x 2^-1 is the smallest number which can be rounded to 1 */
+	if (e < -1)
+		return (0);
+	/* 1.0 x 2^31 (or 2^63) is already too large */
+	if (e >= (int)RESTYPE_BITS - 1)
+		return (s ? RESTYPE_MIN : RESTYPE_MAX); /* ??? unspecified */
+
+	/* >= 2^52 is already an exact integer */
+	if (e < DBL_FRACBITS) {
+		/* add 0.5, extraction below will truncate */
+		x += (s ? -0.5 : 0.5);
+	}
+
+	EXTRACT_WORDS(i0, i1, x);
+	e = ((i0 >> 20) & 0x7ff) - DBL_EXP_BIAS;
+	i0 &= 0xfffff;
+	i0 |= (1 << 20);
+
+	shift = e - DBL_FRACBITS;
+	if (shift >=0)
+		res = (shift < 32 ? (RESTYPE)i1 << shift : 0);
+	else
+		res = (shift > -32 ? i1 >> -shift : 0);
+	shift += 32;
+	if (shift >=0)
+		res |= (shift < 32 ? (RESTYPE)i0 << shift : 0);
+	else
+		res |= (shift > -32 ? i0 >> -shift : 0);
+
+	return (s ? -res : res);
+}
diff --git a/lib/libm/src/lroundf.c b/lib/libm/src/lroundf.c
new file mode 100644
index 00000000000..477383d81bd
--- /dev/null
+++ b/lib/libm/src/lroundf.c
@@ -0,0 +1,83 @@
+/*	$OpenBSD: lroundf.c,v 1.1 2005/11/17 20:07:40 otto Exp $	*/
+/* $NetBSD: lroundf.c,v 1.2 2004/10/13 15:18:32 drochner Exp $ */
+
+/*-
+ * Copyright (c) 2004
+ *	Matthias Drochner. 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.
+ */
+
+#include <math.h>
+#include <sys/types.h>
+#include <sys/limits.h>
+#include <ieeefp.h>
+#include <machine/ieee.h>
+#include "math_private.h"
+
+#ifndef LROUNDNAME
+#define LROUNDNAME lroundf
+#define RESTYPE long int
+#define RESTYPE_MIN LONG_MIN
+#define RESTYPE_MAX LONG_MAX
+#endif
+
+#define RESTYPE_BITS (sizeof(RESTYPE) * 8)
+
+RESTYPE
+LROUNDNAME(float x)
+{
+	u_int32_t i0;
+	int e, s, shift;
+	RESTYPE res;
+
+	GET_FLOAT_WORD(i0, x);
+	e = i0 >> SNG_FRACBITS;
+	s = e >> SNG_EXPBITS;
+	e = (e & 0xff) - SNG_EXP_BIAS;
+
+	/* 1.0 x 2^-1 is the smallest number which can be rounded to 1 */
+	if (e < -1)
+		return (0);
+	/* 1.0 x 2^31 (or 2^63) is already too large */
+	if (e >= (int)RESTYPE_BITS - 1)
+		return (s ? RESTYPE_MIN : RESTYPE_MAX); /* ??? unspecified */
+
+	/* >= 2^23 is already an exact integer */
+	if (e < SNG_FRACBITS) {
+		/* add 0.5, extraction below will truncate */
+		x += (s ? -0.5 : 0.5);
+	}
+
+	GET_FLOAT_WORD(i0, x);
+	e = ((i0 >> SNG_FRACBITS) & 0xff) - SNG_EXP_BIAS;
+	i0 &= 0x7fffff;
+	i0 |= (1 << SNG_FRACBITS);
+
+	shift = e - SNG_FRACBITS;
+	if (shift >=0)
+		res = (shift < 32 ? (RESTYPE)i0 << shift : 0);
+	else
+		res = (shift > -32 ? i0 >> -shift : 0);
+
+	return (s ? -res : res);
+}