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added and modified libm to support SuperH architecture

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1 parent 90ec5f2 commit d87945b4e706dbbacd71f6a3fd2e96162e970094 Shin-ichiro KAWASAKI committed with Tony Sim Aug 31, 2009
Showing with 345 additions and 1 deletion.
  1. +6 −0 MAINTAINERS
  2. +11 −1 libm/Android.mk
  3. +58 −0 libm/sh/_fpmath.h
  4. +30 −0 libm/sh/fenv.c
  5. +240 −0 libm/sh/fenv.h
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6 MAINTAINERS
@@ -0,0 +1,6 @@
+
+Bionic support for SuperH
+-------------------------
+Bionic support for SuperH architecture is written by
+Shin-ichiro KAWASAKI <shinichiro.kawasaki.mg@hitachi.com>
+and Contributed to Android by Hitachi, Ltd. and Renesas Solutions Corp.
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12 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
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58 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
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30 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 };
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240 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_ */
+

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