added and modified libm to support SuperH architecture

4 files changed, 339 insertions, 1 deletions

diff --git a/libm/Android.mk b/libm/Android.mk
index 8f0c3b1..fa73aff 100644
--- a/libm/Android.mk
+++ b/libm/Android.mk
@@ -170,7 +170,17 @@ else
 
     libm_common_includes = $(LOCAL_PATH)/i386 $(LOCAL_PATH)/i387
   else
-    $(error "Unknown architecture")
+    ifeq ($(TARGET_OS)-$(TARGET_ARCH),linux-sh)
+      libm_common_src_files += \
+		sh/fenv.c \
+		src/s_scalbln.c \
+		src/s_scalbn.c \
+		src/s_scalbnf.c
+
+      libm_common_includes = $(LOCAL_PATH)/sh
+    else
+      $(error "Unknown architecture")
+    endif
   endif
 endif
 
diff --git a/libm/sh/_fpmath.h b/libm/sh/_fpmath.h
new file mode 100644
index 0000000..f75ec7b
--- /dev/null
+++ b/libm/sh/_fpmath.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2009 Android Open Source Project, All rights reserved.
+ *   Derived from "bionic/libm/arm/_fpmath.h"
+ *   Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+/*
+ * Assumes that 'long double' on SH-linux is just an alias for 'double'.
+ */
+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;
+#elif __BYTE_ORDER == __BIG_ENDIAN
+		unsigned int	sign	:1;
+		unsigned int	exp	:11;
+		unsigned int	manh	:20;
+		unsigned int	manl	:32;
+#endif
+	} bits;
+};
+
+/*
+ * LDBL_NBIT is a mask indicating the position of the integer
+ * bit in a long double.  But SH4 does not support it.
+ */
+#define	LDBL_NBIT	0
+#define	mask_nbit_l(u)	((void)0)
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
diff --git a/libm/sh/fenv.c b/libm/sh/fenv.c
new file mode 100644
index 0000000..ca8f476
--- /dev/null
+++ b/libm/sh/fenv.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2009 Android Open Source Project, All rights reserved.
+ *   Derived from "bionic/libm/arm/fenv.c"
+ *   Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+long __fpscr_values[2] = { 0L, 0x80000L };
diff --git a/libm/sh/fenv.h b/libm/sh/fenv.h
new file mode 100644
index 0000000..e872f47
--- /dev/null
+++ b/libm/sh/fenv.h
@@ -0,0 +1,240 @@
+/*
+ * Copyright (C) 2009 Android Open Source Project, All rights reserved.
+ *   Derived from "bionic/libm/arm/fenv.h"
+ *   Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+#ifndef _FENV_H_
+#define _FENV_H_
+
+#include <stdio.h>
+#include <sys/types.h>
+
+typedef	uint32_t	fenv_t;
+typedef	uint32_t	fexcept_t;
+
+/* Exception flags */
+#define	FE_INVALID		0x0010
+#define	FE_DIVBYZERO	0x0008
+#define	FE_OVERFLOW		0x0004
+#define	FE_UNDERFLOW	0x0002
+#define	FE_INEXACT		0x0001
+#define	FE_ALL_EXCEPT	(FE_DIVBYZERO | FE_INEXACT | \
+				 FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* Rounding modes */
+#define	FE_TONEAREST	0x0000
+#define	FE_TOWARDZERO	0x0001
+#define	FE_UPWARD	0x0002 /* not supporetd */
+#define	FE_DOWNWARD	0x0003 /* not supporetd */
+#define	_ROUND_MASK	(FE_TONEAREST | FE_DOWNWARD | \
+				 FE_UPWARD | FE_TOWARDZERO)
+
+/* bit shift for FPSCR mapping */
+#define	_FPUE_CAUSE_SHIFT	12
+#define	_FPUE_ENABLE_SHIFT	17
+#define	_FPUE_FLAG_SHIFT	 2
+
+/* bit shifters */
+#define	_FPUE_CAUSE(_EXCS)	((_EXCS) << _FPUE_CAUSE_SHIFT)
+#define	_FPUE_ENABLE(_EXCS)	((_EXCS) << _FPUE_ENABLE_SHIFT)
+#define	_FPUE_FLAG(_EXCS)	((_EXCS) << _FPUE_FLAG_SHIFT)
+
+#define	_GET_FPUE_CAUSE(_FPUE)		(((_FPUE) >> _FPUE_CAUSE_SHIFT) & FE_ALL_EXCEPT)
+#define	_GET_FPUE_ENABLE(_FPUE)	(((_FPUE) >> _FPUE_ENABLE_SHIFT)& FE_ALL_EXCEPT)
+#define	_GET_FPUE_FLAG(_FPUE)		(((_FPUE) >> _FPUE_FLAG_SHIFT) & FE_ALL_EXCEPT)
+
+
+/* FPSCR register accessors */
+#ifdef	__SH4_NOFPU__
+#define	__read_fpscr(_ptr)
+#define	__write_fpscr(_val)
+#else
+#define	__read_fpscr(_ptr)	__asm __volatile("sts fpscr, %0" : "=r" (*(_ptr)))
+#define	__write_fpscr(_val)	__asm __volatile("lds %0, fpscr" : : "r" (_val))
+#endif
+
+
+/* functions for libm */
+static __inline int
+feclearexcept(int __excepts)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	__fpscr &= ~_FPUE_FLAG(__excepts);
+	__write_fpscr(__fpscr);
+	return (0);
+}
+
+static __inline int
+fegetexceptflag(fexcept_t *__flagp, int __excepts)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	*__flagp = _GET_FPUE_FLAG(__fpscr) & __excepts;
+	return (0);
+}
+
+
+static __inline int
+fesetexceptflag(const fexcept_t *__flagp, int __excepts)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	__fpscr &= ~_FPUE_FLAG(__excepts);
+	__fpscr |= ~_FPUE_FLAG(*__flagp & __excepts);
+	__write_fpscr(__fpscr);
+	return (0);
+}
+
+
+static __inline int
+feraiseexcept(int __excepts)
+{
+	fexcept_t __ex = __excepts;
+
+	fesetexceptflag(&__ex, __excepts);	/* XXX */
+	return (0);
+}
+
+
+static __inline int
+fetestexcept(int __excepts)
+{
+	fexcept_t __ex;
+
+	fegetexceptflag(&__ex,  __excepts);
+	return (__ex);
+}
+
+
+static __inline int
+fegetround(void)
+{
+	uint32_t __fpscr = 0;
+
+	__read_fpscr(&__fpscr);
+	return (__fpscr & _ROUND_MASK);	
+}
+
+static __inline int
+fesetround(int __round)
+{
+	uint32_t __fpscr = 0;
+
+	if (__round == FE_UPWARD || __round == FE_DOWNWARD) {
+		fprintf(stderr, "libm superh : "
+			"upward/downward rounding not supporetd.\n");
+		return -1;
+	}
+
+	__read_fpscr(&__fpscr);
+	__fpscr &= ~_ROUND_MASK;
+	__fpscr |= (__round & _ROUND_MASK);
+	__write_fpscr(__fpscr);
+	return (0);
+}
+
+static __inline int
+fegetenv(fenv_t *__envp)
+{
+	__read_fpscr(__envp);
+	return (0);
+}
+
+static __inline int
+feholdexcept(fenv_t *__envp)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	*__envp = __fpscr;
+	__fpscr &= ~_FPUE_FLAG(FE_ALL_EXCEPT);
+	__write_fpscr(__fpscr);
+	return (0);
+}
+
+
+static __inline int
+fesetenv(const fenv_t *__envp)
+{
+	__write_fpscr(*__envp);
+	return (0);
+}
+
+
+static __inline int
+feupdateenv(const fenv_t *__envp)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	__write_fpscr(*__envp);
+	feraiseexcept(_GET_FPUE_FLAG(__fpscr));
+	return (0);
+}
+
+#if __BSD_VISIBLE
+
+static __inline int
+feenableexcept(int __mask)
+{
+	uint32_t __old_fpscr, __new_fpscr;
+
+	__read_fpscr(&__old_fpscr);
+	__new_fpscr = __old_fpscr | _FPUE_ENABLE(__mask & FE_ALL_EXCEPT);
+	__write_fpscr(__new_fpscr);
+	return (_GET_FPUE_ENABLE(__old_fpscr));
+}
+
+static __inline int
+fedisableexcept(int __mask)
+{
+	uint32_t __old_fpscr, __new_fpscr;
+
+	__read_fpscr(&__old_fpscr);
+	__new_fpscr = __old_fpscr & ~(_FPUE_ENABLE(__mask & FE_ALL_EXCEPT));
+	__write_fpscr(__new_fpscr);
+	return (_GET_FPUE_ENABLE(__old_fpscr));
+}
+
+static __inline int
+fegetexcept(void)
+{
+	uint32_t __fpscr;
+
+	__read_fpscr(&__fpscr);
+	return (_GET_FPUE_ENABLE(__fpscr));
+}
+
+#endif /* __BSD_VISIBLE */
+
+
+#endif /* _FENV_H_ */
+