toolchain/uClibc/patches-0.9.31/450-powerpc_copysignl.patch

   1 --- a/libc/sysdeps/linux/powerpc/Makefile.arch
   2 +++ b/libc/sysdeps/linux/powerpc/Makefile.arch
   3 @@ -5,7 +5,7 @@
   4  # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   5  #
   6
   7 -CSRC := __syscall_error.c pread_write.c ioctl.c
   8 +CSRC := __syscall_error.c pread_write.c ioctl.c copysignl.c
   9
  10  ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),y)
  11  CSRC += posix_fadvise.c posix_fadvise64.c
  12 --- /dev/null
  13 +++ b/libc/sysdeps/linux/powerpc/copysignl.c
  14 @@ -0,0 +1,89 @@
  15 +/* s_copysignl.c -- long double version of s_copysign.c.
  16 + * Conversion to long double by Ulrich Drepper,
  17 + * Cygnus Support, drepper@cygnus.com.
  18 + */
  19 +
  20 +/*
  21 + * ====================================================
  22 + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  23 + *
  24 + * Developed at SunPro, a Sun Microsystems, Inc. business.
  25 + * Permission to use, copy, modify, and distribute this
  26 + * software is freely granted, provided that this notice
  27 + * is preserved.
  28 + * ====================================================
  29 + */
  30 +
  31 +/*
  32 + * copysignl(long double x, long double y)
  33 + * copysignl(x,y) returns a value with the magnitude of x and
  34 + * with the sign bit of y.
  35 + */
  36 +
  37 +#include <endian.h>
  38 +#include <stdint.h>
  39 +
  40 +#if __FLOAT_WORD_ORDER == BIG_ENDIAN
  41 +
  42 +typedef union
  43 +{
  44 +  long double value;
  45 +  struct
  46 +  {
  47 +    int sign_exponent:16;
  48 +    unsigned int empty:16;
  49 +    uint32_t msw;
  50 +    uint32_t lsw;
  51 +  } parts;
  52 +} ieee_long_double_shape_type;
  53 +
  54 +#endif
  55 +
  56 +#if __FLOAT_WORD_ORDER == LITTLE_ENDIAN
  57 +
  58 +typedef union
  59 +{
  60 +  long double value;
  61 +  struct
  62 +  {
  63 +    uint32_t lsw;
  64 +    uint32_t msw;
  65 +    int sign_exponent:16;
  66 +    unsigned int empty:16;
  67 +  } parts;
  68 +} ieee_long_double_shape_type;
  69 +
  70 +#endif
  71 +
  72 +/* Get int from the exponent of a long double.  */
  73 +
  74 +#define GET_LDOUBLE_EXP(exp,d)                                 \
  75 +do {                                                           \
  76 +  ieee_long_double_shape_type ge_u;                            \
  77 +  ge_u.value = (d);                                            \
  78 +  (exp) = ge_u.parts.sign_exponent;                            \
  79 +} while (0)
  80 +
  81 +/* Set exponent of a long double from an int.  */
  82 +
  83 +#define SET_LDOUBLE_EXP(d,exp)                                 \
  84 +do {                                                           \
  85 +  ieee_long_double_shape_type se_u;                            \
  86 +  se_u.value = (d);                                            \
  87 +  se_u.parts.sign_exponent = (exp);                            \
  88 +  (d) = se_u.value;                                            \
  89 +} while (0)
  90 +
  91 +long double copysignl(long double x, long double y);
  92 +libc_hidden_proto(copysignl);
  93 +
  94 +long double copysignl(long double x, long double y)
  95 +{
  96 +       uint32_t es1,es2;
  97 +       GET_LDOUBLE_EXP(es1,x);
  98 +       GET_LDOUBLE_EXP(es2,y);
  99 +       SET_LDOUBLE_EXP(x,(es1&0x7fff)|(es2&0x8000));
 100 +        return x;
 101 +}
 102 +
 103 +libc_hidden_def(copysignl);