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From: Joel Sherrill <joel@rtems.org>
To: newlib@sourceware.org
Subject: [PATCH newlib v1 1/4] Add infrastructure for incorporating FreeBSD long double methods
Date: Mon, 22 Aug 2022 17:50:19 -0500	[thread overview]
Message-ID: <20220822225022.32209-2-joel@rtems.org> (raw)
In-Reply-To: <20220822225022.32209-1-joel@rtems.org>

Newlib's long double math support is almost entirely for when
sizeof(long double) == sizeof(double). This is true for many newlib
targets but not all. This patch includes the infrastructure for
having true long double code from FreeBSD, long double equal double
implementations, and optimized long double implementations.
---
 newlib/libc/acinclude.m4                      |   2 +
 newlib/libc/include/math.h                    |  14 --
 newlib/libc/include/sys/endian.h              | 207 ++++++++++++++++++
 newlib/libc/machine/aarch64/machine/_fpmath.h |  64 ++++++
 newlib/libc/machine/arm/machine/_fpmath.h     |  69 ++++++
 newlib/libc/machine/i386/machine/_fpmath.h    |  56 +++++
 newlib/libc/machine/mips/machine/_fpmath.h    |  58 +++++
 newlib/libc/machine/powerpc/machine/_fpmath.h | 101 +++++++++
 newlib/libc/machine/riscv/machine/_fpmath.h   |  71 ++++++
 newlib/libc/machine/sparc64/machine/_fpmath.h |  59 +++++
 newlib/libc/machine/x86_64/machine/_fpmath.h  |  57 +++++
 newlib/libm/common/Makefile.inc               |  14 +-
 newlib/libm/common/ldbl/fpmath.h              |  82 +++++++
 newlib/libm/common/ldbl/s_truncl.c            |  68 ++++++
 .../{truncl.c => ldbl_eq_dbl/s_truncl.c}      |   0
 15 files changed, 906 insertions(+), 16 deletions(-)
 create mode 100644 newlib/libc/include/sys/endian.h
 create mode 100644 newlib/libc/machine/aarch64/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/arm/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/i386/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/mips/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/powerpc/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/riscv/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/sparc64/machine/_fpmath.h
 create mode 100644 newlib/libc/machine/x86_64/machine/_fpmath.h
 create mode 100644 newlib/libm/common/ldbl/fpmath.h
 create mode 100644 newlib/libm/common/ldbl/s_truncl.c
 rename newlib/libm/common/{truncl.c => ldbl_eq_dbl/s_truncl.c} (100%)

diff --git a/newlib/libc/acinclude.m4 b/newlib/libc/acinclude.m4
index 7cba7db39..f7c3a6a78 100644
--- a/newlib/libc/acinclude.m4
+++ b/newlib/libc/acinclude.m4
@@ -62,4 +62,6 @@ m4_foreach_w([MACHINE], [
   z8k
 ], [AM_CONDITIONAL([HAVE_LIBC_MACHINE_]m4_toupper(MACHINE), test "${machine_dir}" = MACHINE)])
 
+AM_CONDITIONAL(HAVE_FPMATH_H, test -r "${srcdir}/libc/machine/${machine_dir}/machine/_fpmath.h")
+
 AM_CONDITIONAL(MACH_ADD_SETJMP, test "x$mach_add_setjmp" = "xtrue")
diff --git a/newlib/libc/include/math.h b/newlib/libc/include/math.h
index 54e30ef82..7fc18b6dd 100644
--- a/newlib/libc/include/math.h
+++ b/newlib/libc/include/math.h
@@ -440,14 +440,7 @@ extern float log2f (float);
 extern float hypotf (float, float);
 #endif /* ! defined (_REENT_ONLY) */
 
-/* Newlib doesn't fully support long double math functions so far.
-   On platforms where long double equals double the long double functions
-   simply call the double functions.  On Cygwin the long double functions
-   are implemented independently from newlib to be able to use optimized
-   assembler functions despite using the Microsoft x86_64 ABI. */
-#if defined (_LDBL_EQ_DBL) || defined (__CYGWIN__)
 /* Reentrant ANSI C functions.  */
-#ifndef __math_68881
 extern long double atanl (long double);
 extern long double cosl (long double);
 extern long double sinl (long double);
@@ -460,10 +453,7 @@ extern long double fabsl (long double);
 extern long double floorl (long double);
 extern long double log1pl (long double);
 extern long double expm1l (long double);
-#endif /* ! defined (__math_68881) */
 /* Non reentrant ANSI C functions.  */
-#ifndef _REENT_ONLY
-#ifndef __math_68881
 extern long double acosl (long double);
 extern long double asinl (long double);
 extern long double atan2l (long double, long double);
@@ -477,8 +467,6 @@ extern long double powl (long double, long double);
 extern long double sqrtl (long double);
 extern long double fmodl (long double, long double);
 extern long double hypotl (long double, long double);
-#endif /* ! defined (__math_68881) */
-#endif /* ! defined (_REENT_ONLY) */
 extern long double copysignl (long double, long double);
 extern long double nanl (const char *);
 extern int ilogbl (long double);
@@ -515,7 +503,6 @@ extern long double lgammal (long double);
 extern long double erfl (long double);
 extern long double erfcl (long double);
 #endif /* ! defined (_REENT_ONLY) */
-#else /* !_LDBL_EQ_DBL && !__CYGWIN__ */
 extern long double hypotl (long double, long double);
 extern long double sqrtl (long double);
 extern long double frexpl (long double, int *);
@@ -525,7 +512,6 @@ extern _LONG_DOUBLE rintl (_LONG_DOUBLE);
 extern long int lrintl (_LONG_DOUBLE);
 extern long long int llrintl (_LONG_DOUBLE);
 #endif /* __i386__ */
-#endif /* !_LDBL_EQ_DBL && !__CYGWIN__ */
 
 #endif /* __ISO_C_VISIBLE >= 1999 */
 
diff --git a/newlib/libc/include/sys/endian.h b/newlib/libc/include/sys/endian.h
new file mode 100644
index 000000000..3cef6130c
--- /dev/null
+++ b/newlib/libc/include/sys/endian.h
@@ -0,0 +1,207 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_ENDIAN_H_
+#define _SYS_ENDIAN_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+#include <machine/endian.h>
+
+#ifndef _UINT8_T_DECLARED
+typedef	__uint8_t	uint8_t;
+#define	_UINT8_T_DECLARED
+#endif
+ 
+#ifndef _UINT16_T_DECLARED
+typedef	__uint16_t	uint16_t;
+#define	_UINT16_T_DECLARED
+#endif
+ 
+#ifndef _UINT32_T_DECLARED
+typedef	__uint32_t	uint32_t;
+#define	_UINT32_T_DECLARED
+#endif
+ 
+#ifndef _UINT64_T_DECLARED
+typedef	__uint64_t	uint64_t;
+#define	_UINT64_T_DECLARED
+#endif
+ 
+/*
+ * General byte order swapping functions.
+ */
+#define	bswap16(x)	__bswap16(x)
+#define	bswap32(x)	__bswap32(x)
+#define	bswap64(x)	__bswap64(x)
+
+/*
+ * Host to big endian, host to little endian, big endian to host, and little
+ * endian to host byte order functions as detailed in byteorder(9).
+ */
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#define	htobe16(x)	bswap16((x))
+#define	htobe32(x)	bswap32((x))
+#define	htobe64(x)	bswap64((x))
+#define	htole16(x)	((uint16_t)(x))
+#define	htole32(x)	((uint32_t)(x))
+#define	htole64(x)	((uint64_t)(x))
+
+#define	be16toh(x)	bswap16((x))
+#define	be32toh(x)	bswap32((x))
+#define	be64toh(x)	bswap64((x))
+#define	le16toh(x)	((uint16_t)(x))
+#define	le32toh(x)	((uint32_t)(x))
+#define	le64toh(x)	((uint64_t)(x))
+#else /* _BYTE_ORDER != _LITTLE_ENDIAN */
+#define	htobe16(x)	((uint16_t)(x))
+#define	htobe32(x)	((uint32_t)(x))
+#define	htobe64(x)	((uint64_t)(x))
+#define	htole16(x)	bswap16((x))
+#define	htole32(x)	bswap32((x))
+#define	htole64(x)	bswap64((x))
+
+#define	be16toh(x)	((uint16_t)(x))
+#define	be32toh(x)	((uint32_t)(x))
+#define	be64toh(x)	((uint64_t)(x))
+#define	le16toh(x)	bswap16((x))
+#define	le32toh(x)	bswap32((x))
+#define	le64toh(x)	bswap64((x))
+#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
+
+/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
+
+static __inline uint16_t
+be16dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return ((p[0] << 8) | p[1]);
+}
+
+static __inline uint32_t
+be32dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static __inline uint64_t
+be64dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
+}
+
+static __inline uint16_t
+le16dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return ((p[1] << 8) | p[0]);
+}
+
+static __inline uint32_t
+le32dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+static __inline uint64_t
+le64dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
+}
+
+static __inline void
+be16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 8) & 0xff;
+	p[1] = u & 0xff;
+}
+
+static __inline void
+be32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 24) & 0xff;
+	p[1] = (u >> 16) & 0xff;
+	p[2] = (u >> 8) & 0xff;
+	p[3] = u & 0xff;
+}
+
+static __inline void
+be64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	be32enc(p, (uint32_t)(u >> 32));
+	be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
+}
+
+static __inline void
+le16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+}
+
+static __inline void
+le32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+	p[2] = (u >> 16) & 0xff;
+	p[3] = (u >> 24) & 0xff;
+}
+
+static __inline void
+le64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	le32enc(p, (uint32_t)(u & 0xffffffffU));
+	le32enc(p + 4, (uint32_t)(u >> 32));
+}
+
+#endif	/* _SYS_ENDIAN_H_ */
diff --git a/newlib/libc/machine/aarch64/machine/_fpmath.h b/newlib/libc/machine/aarch64/machine/_fpmath.h
new file mode 100644
index 000000000..fa62ae81c
--- /dev/null
+++ b/newlib/libc/machine/aarch64/machine/_fpmath.h
@@ -0,0 +1,64 @@
+/*-
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * Copyright (2) 2014 The FreeBSD Foundation
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Change unsigned int/long used by FreeBSD to fixed width types because
+ * ilp32 has a different size for unsigned long. --joel (20 Aug 2022)
+ */
+#include <stdint.h>
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		uint64_t	manl	:64;
+		uint64_t	manh	:48;
+		uint32_t	exp	:15;
+		uint32_t	sign	:1;
+	} bits;
+	/* TODO andrew: Check the packing here */
+	struct {
+		uint64_t	manl	:64;
+		uint64_t	manh	:48;
+		uint32_t	expsign	:16;
+	} xbits;
+};
+
+#define	LDBL_NBIT	0
+#define	LDBL_IMPLICIT_NBIT
+#define	mask_nbit_l(u)	((void)0)
+
+#define	LDBL_MANH_SIZE	48
+#define	LDBL_MANL_SIZE	64
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)((u).bits.manl >> 32);	\
+	(a)[2] = (uint32_t)(u).bits.manh;		\
+	(a)[3] = (uint32_t)((u).bits.manh >> 32);	\
+} while(0)
diff --git a/newlib/libc/machine/arm/machine/_fpmath.h b/newlib/libc/machine/arm/machine/_fpmath.h
new file mode 100644
index 000000000..f5ae2f95a
--- /dev/null
+++ b/newlib/libc/machine/arm/machine/_fpmath.h
@@ -0,0 +1,69 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#if defined(__VFP_FP__) || defined(__ARM_EABI__)
+#define	_IEEE_WORD_ORDER	_BYTE_ORDER
+#else
+#define	_IEEE_WORD_ORDER	_BIG_ENDIAN
+#endif
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#if _IEEE_WORD_ORDER == _LITTLE_ENDIAN
+		unsigned int	manl	:32;
+#endif
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#if _IEEE_WORD_ORDER == _BIG_ENDIAN
+		unsigned int	manl	:32;
+#endif
+#else	/* _BYTE_ORDER == _LITTLE_ENDIAN */
+		unsigned int		sign	:1;
+		unsigned int		exp	:11;
+		unsigned int		manh	:20;
+		unsigned int		manl	:32;
+#endif
+	} bits;
+};
+
+#define	LDBL_NBIT	0
+#define	LDBL_IMPLICIT_NBIT
+#define	mask_nbit_l(u)	((void)0)
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
diff --git a/newlib/libc/machine/i386/machine/_fpmath.h b/newlib/libc/machine/i386/machine/_fpmath.h
new file mode 100644
index 000000000..874439c34
--- /dev/null
+++ b/newlib/libc/machine/i386/machine/_fpmath.h
@@ -0,0 +1,56 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		unsigned int	manl	:32;
+		unsigned int	manh	:32;
+		unsigned int	exp	:15;
+		unsigned int	sign	:1;
+		unsigned int	junk	:16;
+	} bits;
+	struct {
+		unsigned long long man	:64;
+		unsigned int 	expsign	:16;
+		unsigned int	junk	:16;
+	} xbits;
+};
+
+#define	LDBL_NBIT	0x80000000
+#define	mask_nbit_l(u)	((u).bits.manh &= ~LDBL_NBIT)
+
+#define	LDBL_MANH_SIZE	32
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while (0)
diff --git a/newlib/libc/machine/mips/machine/_fpmath.h b/newlib/libc/machine/mips/machine/_fpmath.h
new file mode 100644
index 000000000..cece2fa81
--- /dev/null
+++ b/newlib/libc/machine/mips/machine/_fpmath.h
@@ -0,0 +1,58 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+#ifndef __MIPSEB__
+		unsigned int	manl	:32;
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#else
+		unsigned int		sign	:1;
+		unsigned int		exp	:11;
+		unsigned int		manh	:20;
+		unsigned int		manl	:32;
+#endif
+	} bits;
+};
+
+#define	LDBL_NBIT	0
+#define	mask_nbit_l(u)	((void)0)
+#define	LDBL_IMPLICIT_NBIT
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
diff --git a/newlib/libc/machine/powerpc/machine/_fpmath.h b/newlib/libc/machine/powerpc/machine/_fpmath.h
new file mode 100644
index 000000000..b19c19777
--- /dev/null
+++ b/newlib/libc/machine/powerpc/machine/_fpmath.h
@@ -0,0 +1,101 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Newlib's powerpc code can be built multilib for 32 and 64 bit targets.
+ * FreeBSD has separate 32 and 64 bit PowerPC versions of _fpmath.h. This
+ * file is just a merger of the two version with an ifdef added.
+ *   --joel (20 Aug 2022)
+ */
+
+#ifdef __PPC64__
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+		unsigned int	manl	:32;
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#else	/* _BYTE_ORDER == _LITTLE_ENDIAN */
+		unsigned int		sign	:1;
+		unsigned int		exp	:11;
+		unsigned int		manh	:20;
+		unsigned int		manl	:32;
+#endif
+	} bits;
+};
+
+#define	mask_nbit_l(u)	((void)0)
+#define	LDBL_IMPLICIT_NBIT
+#define	LDBL_NBIT	0
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
+
+#else
+/* PowerPC 32 bit */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+		unsigned int	manl	:32;
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#else	/* _BYTE_ORDER == _LITTLE_ENDIAN */
+		unsigned int		sign	:1;
+		unsigned int		exp	:11;
+		unsigned int		manh	:20;
+		unsigned int		manl	:32;
+#endif
+	} bits;
+};
+
+#define	mask_nbit_l(u)	((void)0)
+#define	LDBL_IMPLICIT_NBIT
+#define	LDBL_NBIT	0
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
+
+#endif /* PowerPC 32/64 bits */
diff --git a/newlib/libc/machine/riscv/machine/_fpmath.h b/newlib/libc/machine/riscv/machine/_fpmath.h
new file mode 100644
index 000000000..5c4077cb9
--- /dev/null
+++ b/newlib/libc/machine/riscv/machine/_fpmath.h
@@ -0,0 +1,71 @@
+/*-
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		unsigned long	manl	:64;
+		unsigned long	manh	:48;
+		unsigned int	exp	:15;
+		unsigned int	sign	:1;
+	} bits;
+	struct {
+		unsigned long	manl	:64;
+		unsigned long	manh	:48;
+		unsigned int	expsign	:16;
+	} xbits;
+};
+
+#define	LDBL_NBIT	0
+#define	LDBL_IMPLICIT_NBIT
+#define	mask_nbit_l(u)	((void)0)
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
+
+/*
+ * TODO: Due to compiler problem we are temporary using
+ * LDBL_PREC == 53. Use code below for LDBL_PREC == 113
+ */
+#if 0
+#define	LDBL_MANH_SIZE	48
+#define	LDBL_MANL_SIZE	64
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)((u).bits.manl >> 32);	\
+	(a)[2] = (uint32_t)(u).bits.manh;		\
+	(a)[3] = (uint32_t)((u).bits.manh >> 32);	\
+} while(0)
+#endif
diff --git a/newlib/libc/machine/sparc64/machine/_fpmath.h b/newlib/libc/machine/sparc64/machine/_fpmath.h
new file mode 100644
index 000000000..847411572
--- /dev/null
+++ b/newlib/libc/machine/sparc64/machine/_fpmath.h
@@ -0,0 +1,59 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		unsigned int	sign	:1;
+		unsigned int	exp	:15;
+		unsigned long	manh	:48;
+		unsigned long	manl	:64;
+	} bits;
+	struct {
+		unsigned int	expsign	:16;
+		unsigned long	manh	:48;
+		unsigned long	manl	:64;
+	} xbits;
+};
+
+#define	mask_nbit_l(u)	((void)0)
+#define	LDBL_IMPLICIT_NBIT
+#define	LDBL_NBIT	0
+
+#define	LDBL_MANH_SIZE	48
+#define	LDBL_MANL_SIZE	64
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)((u).bits.manl >> 32);      	\
+	(a)[2] = (uint32_t)(u).bits.manh;		\
+	(a)[3] = (uint32_t)((u).bits.manh >> 32);	\
+} while(0)
diff --git a/newlib/libc/machine/x86_64/machine/_fpmath.h b/newlib/libc/machine/x86_64/machine/_fpmath.h
new file mode 100644
index 000000000..8be7b7dba
--- /dev/null
+++ b/newlib/libc/machine/x86_64/machine/_fpmath.h
@@ -0,0 +1,57 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+		unsigned int	manl	:32;
+		unsigned int	manh	:32;
+		unsigned int	exp	:15;
+		unsigned int	sign	:1;
+		unsigned int	junkl	:16;
+		unsigned int	junkh	:32;
+	} bits;
+	struct {
+		unsigned long	man	:64;
+		unsigned int	expsign	:16;
+		unsigned long	junk	:48;
+	} xbits;
+};
+
+#define	LDBL_NBIT	0x80000000
+#define	mask_nbit_l(u)	((u).bits.manh &= ~LDBL_NBIT)
+
+#define	LDBL_MANH_SIZE	32
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while (0)
diff --git a/newlib/libm/common/Makefile.inc b/newlib/libm/common/Makefile.inc
index 8b54acab6..d08b8b21a 100644
--- a/newlib/libm/common/Makefile.inc
+++ b/newlib/libm/common/Makefile.inc
@@ -65,18 +65,28 @@
 	%D%/expl.c %D%/ldexpl.c %D%/logl.c %D%/log10l.c %D%/powl.c %D%/sqrtl.c %D%/fmodl.c %D%/hypotl.c \
 	%D%/copysignl.c %D%/nanl.c %D%/ilogbl.c %D%/asinhl.c %D%/cbrtl.c %D%/nextafterl.c %D%/rintl.c \
 	%D%/scalbnl.c %D%/exp2l.c %D%/scalblnl.c %D%/tgammal.c %D%/nearbyintl.c %D%/lrintl.c %D%/llrintl.c \
-	%D%/roundl.c %D%/lroundl.c %D%/llroundl.c %D%/truncl.c %D%/remquol.c %D%/fdiml.c %D%/fmaxl.c %D%/fminl.c \
+	%D%/roundl.c %D%/lroundl.c %D%/llroundl.c %D%/remquol.c %D%/fdiml.c %D%/fmaxl.c %D%/fminl.c \
 	%D%/fmal.c %D%/acoshl.c %D%/atanhl.c %D%/remainderl.c %D%/lgammal.c %D%/erfl.c %D%/erfcl.c \
 	%D%/logbl.c %D%/nexttowardf.c %D%/nexttoward.c %D%/nexttowardl.c %D%/log2l.c \
 	%D%/sl_finite.c
 
+%C%_ldbl_eq_dbl_src = %D%/ldbl_eq_dbl/s_truncl.c
+
+%C%_ldbl_src = %D%/ldbl/s_truncl.c
+
 libm_a_CFLAGS_%C% = -fbuiltin -fno-math-errno
 
 libm_a_SOURCES += $(%C%_src) $(%C%_fsrc)
 if HAVE_LONG_DOUBLE
-libm_a_SOURCES += $(%C%_lsrc)
+  libm_a_SOURCES += $(%C%_lsrc)
 endif # HAVE_LONG_DOUBLE
 
+if HAVE_FPMATH_H
+  libm_a_SOURCES += $(%C%_ldbl_src)
+else
+  libm_a_SOURCES += $(%C%_ldbl_eq_dbl_src)
+endif # HAVE_FPMATH_H
+
 LIBM_CHEWOUT_FILES += \
 	%D%/s_cbrt.def %D%/s_copysign.def %D%/s_exp10.def %D%/s_expm1.def %D%/s_ilogb.def \
 	%D%/s_infinity.def %D%/s_isnan.def %D%/s_log1p.def %D%/s_modf.def \
diff --git a/newlib/libm/common/ldbl/fpmath.h b/newlib/libm/common/ldbl/fpmath.h
new file mode 100644
index 000000000..690f94eaf
--- /dev/null
+++ b/newlib/libm/common/ldbl/fpmath.h
@@ -0,0 +1,82 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
+ * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _FPMATH_H_
+#define _FPMATH_H_
+
+#include "sys/endian.h"
+#include "machine/_fpmath.h"  /* changed to machine for newlib */
+
+#ifndef _IEEE_WORD_ORDER
+#define	_IEEE_WORD_ORDER	_BYTE_ORDER
+#endif
+
+union IEEEf2bits {
+	float	f;
+	struct {
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+		unsigned int	man	:23;
+		unsigned int	exp	:8;
+		unsigned int	sign	:1;
+#else /* _BIG_ENDIAN */
+		unsigned int	sign	:1;
+		unsigned int	exp	:8;
+		unsigned int	man	:23;
+#endif
+	} bits;
+};
+
+#define	DBL_MANH_SIZE	20
+#define	DBL_MANL_SIZE	32
+
+union IEEEd2bits {
+	double	d;
+	struct {
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#if _IEEE_WORD_ORDER == _LITTLE_ENDIAN
+		unsigned int	manl	:32;
+#endif
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#if _IEEE_WORD_ORDER == _BIG_ENDIAN
+		unsigned int	manl	:32;
+#endif
+#else /* _BIG_ENDIAN */
+		unsigned int	sign	:1;
+		unsigned int	exp	:11;
+		unsigned int	manh	:20;
+		unsigned int	manl	:32;
+#endif
+	} bits;
+};
+
+#endif /* !_FPMATH_H */
diff --git a/newlib/libm/common/ldbl/s_truncl.c b/newlib/libm/common/ldbl/s_truncl.c
new file mode 100644
index 000000000..9e2b51132
--- /dev/null
+++ b/newlib/libm/common/ldbl/s_truncl.c
@@ -0,0 +1,68 @@
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ *
+ * From: @(#)s_floor.c 5.1 93/09/24
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * truncl(x)
+ * Return x rounded toward 0 to integral value
+ * Method:
+ *	Bit twiddling.
+ * Exception:
+ *	Inexact flag raised if x not equal to truncl(x).
+ */
+
+#include <float.h>
+#include <math.h>
+#include <stdint.h>
+
+#include "fpmath.h"
+
+#ifdef LDBL_IMPLICIT_NBIT
+#define	MANH_SIZE	(LDBL_MANH_SIZE + 1)
+#else
+#define	MANH_SIZE	LDBL_MANH_SIZE
+#endif
+
+static const long double huge = 1.0e300;
+static const float zero[] = { 0.0, -0.0 };
+
+long double
+truncl(long double x)
+{
+	union IEEEl2bits u = { .e = x };
+	int e = u.bits.exp - LDBL_MAX_EXP + 1;
+
+	if (e < MANH_SIZE - 1) {
+		if (e < 0) {			/* raise inexact if x != 0 */
+			if (huge + x > 0.0)
+				u.e = zero[u.bits.sign];
+		} else {
+			uint64_t m = ((1llu << MANH_SIZE) - 1) >> (e + 1);
+			if (((u.bits.manh & m) | u.bits.manl) == 0)
+				return (x);	/* x is integral */
+			if (huge + x > 0.0) {	/* raise inexact flag */
+				u.bits.manh &= ~m;
+				u.bits.manl = 0;
+			}
+		}
+	} else if (e < LDBL_MANT_DIG - 1) {
+		uint64_t m = (uint64_t)-1 >> (64 - LDBL_MANT_DIG + e + 1);
+		if ((u.bits.manl & m) == 0)
+			return (x);	/* x is integral */
+		if (huge + x > 0.0)		/* raise inexact flag */
+			u.bits.manl &= ~m;
+	}
+	return (u.e);
+}
diff --git a/newlib/libm/common/truncl.c b/newlib/libm/common/ldbl_eq_dbl/s_truncl.c
similarity index 100%
rename from newlib/libm/common/truncl.c
rename to newlib/libm/common/ldbl_eq_dbl/s_truncl.c
-- 
2.24.4


  reply	other threads:[~2022-08-22 22:50 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-22 22:50 [PATCH newlib v1 0/4] Add FreeBSD long double functions Joel Sherrill
2022-08-22 22:50 ` Joel Sherrill [this message]
2022-08-22 22:50 ` [PATCH newlib v1 2/4] Makefile.in and configure: Regenerated Joel Sherrill
2022-08-22 22:50 ` [PATCH newlib v1 3/4] Split libm/common/frexpl.c into LDBL_EQ_DBL and long double versions Joel Sherrill
2022-08-22 22:50 ` [PATCH newlib v1 4/4] Makefile.in: Regenerated Joel Sherrill
2022-08-24  9:26 ` [PATCH newlib v1 0/4] Add FreeBSD long double functions Corinna Vinschen
2022-08-24 13:40   ` Joel Sherrill
2022-08-26 15:05     ` Corinna Vinschen
2022-08-26 15:45       ` Joel Sherrill
2022-08-26 17:45         ` Corinna Vinschen
2022-08-26 20:45           ` Jeff Johnston

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