headers/private/kernel/arch/sh4/va-sh.h

   1 /* The ! __SH3E_VARG case is similar to the default gvarargs.h .  */
   2
   3 #if (defined (__SH3E__) || defined (__SH4_SINGLE__) || defined (__SH4__) || defined (__SH4_SINGLE_ONLY__)) && ! defined (__HITACHI__)
   4 #define __SH3E_VARG
   5 #endif
   6
   7 /* Define __gnuc_va_list.  */
   8
   9 #ifndef __GNUC_VA_LIST
  10 #define __GNUC_VA_LIST
  11
  12 #ifdef __SH3E_VARG
  13
  14 typedef long __va_greg;
  15 typedef float __va_freg;
  16
  17 typedef struct {
  18   __va_greg * __va_next_o;              /* next available register */
  19   __va_greg * __va_next_o_limit;        /* past last available register */
  20   __va_freg * __va_next_fp;             /* next available fp register */
  21   __va_freg * __va_next_fp_limit;       /* last available fp register */
  22   __va_greg * __va_next_stack;          /* next extended word on stack */
  23 } __gnuc_va_list;
  24
  25 #else /* ! SH3E */
  26
  27 typedef void *__gnuc_va_list;
  28
  29 #endif /* ! SH3E */
  30
  31 #endif /* __GNUC_VA_LIST */
  32
  33 /* If this is for internal libc use, don't define anything but
  34    __gnuc_va_list.  */
  35 #if defined (_STDARG_H) || defined (_VARARGS_H)
  36
  37 #ifdef _STDARG_H
  38
  39 #ifdef __SH3E_VARG
  40
  41 #define va_start(AP, LASTARG) \
  42 __extension__ \
  43   ({ \
  44      (AP).__va_next_fp = (__va_freg *) __builtin_saveregs (); \
  45      (AP).__va_next_fp_limit = ((AP).__va_next_fp + \
  46                               (__builtin_args_info (1) < 8 ? 8 - __builtin_args_info (1) : 0)); \
  47      (AP).__va_next_o = (__va_greg *) (AP).__va_next_fp_limit; \
  48      (AP).__va_next_o_limit = ((AP).__va_next_o + \
  49                              (__builtin_args_info (0) < 4 ? 4 - __builtin_args_info (0) : 0)); \
  50      (AP).__va_next_stack = (__va_greg *) __builtin_next_arg (LASTARG); \
  51   })
  52
  53 #else /* ! SH3E */
  54
  55 #define va_start(AP, LASTARG)                                           \
  56  ((AP) = ((__gnuc_va_list) __builtin_next_arg (LASTARG)))
  57
  58 #endif /* ! SH3E */
  59
  60 #else /* _VARARGS_H */
  61
  62 #define va_alist  __builtin_va_alist
  63 #define va_dcl    int __builtin_va_alist;...
  64
  65 #ifdef __SH3E_VARG
  66
  67 #define va_start(AP) \
  68 __extension__ \
  69   ({ \
  70      (AP).__va_next_fp = (__va_freg *) __builtin_saveregs (); \
  71      (AP).__va_next_fp_limit = ((AP).__va_next_fp + \
  72                               (__builtin_args_info (1) < 8 ? 8 - __builtin_args_info (1) : 0)); \
  73      (AP).__va_next_o = (__va_greg *) (AP).__va_next_fp_limit; \
  74      (AP).__va_next_o_limit = ((AP).__va_next_o + \
  75                              (__builtin_args_info (0) < 4 ? 4 - __builtin_args_info (0) : 0)); \
  76      (AP).__va_next_stack \
  77        = ((__va_greg *) __builtin_next_arg (__builtin_va_alist) \
  78           - (__builtin_args_info (0) >= 4 || __builtin_args_info (1) >= 8 \
  79              ? 1 : 0)); \
  80   })
  81
  82 #else /* ! SH3E */
  83
  84 #define va_start(AP)  ((AP) = (char *) &__builtin_va_alist)
  85
  86 #endif /* ! SH3E */
  87
  88 #endif /* _STDARG */
  89
  90 #ifndef va_end
  91 void va_end (__gnuc_va_list);           /* Defined in libgcc.a */
  92
  93 /* Values returned by __builtin_classify_type.  */
  94
  95 enum __va_type_classes {
  96   __no_type_class = -1,
  97   __void_type_class,
  98   __integer_type_class,
  99   __char_type_class,
 100   __enumeral_type_class,
 101   __boolean_type_class,
 102   __pointer_type_class,
 103   __reference_type_class,
 104   __offset_type_class,
 105   __real_type_class,
 106   __complex_type_class,
 107   __function_type_class,
 108   __method_type_class,
 109   __record_type_class,
 110   __union_type_class,
 111   __array_type_class,
 112   __string_type_class,
 113   __set_type_class,
 114   __file_type_class,
 115   __lang_type_class
 116 };
 117
 118 #endif
 119 #define va_end(pvar)    ((void)0)
 120
 121 #ifdef __LITTLE_ENDIAN__
 122 #define __LITTLE_ENDIAN_P 1
 123 #else
 124 #define __LITTLE_ENDIAN_P 0
 125 #endif
 126
 127 #define __SCALAR_TYPE(TYPE)                                     \
 128   ((TYPE) == __integer_type_class                               \
 129    || (TYPE) == __char_type_class                               \
 130    || (TYPE) == __enumeral_type_class)
 131
 132 /* RECORD_TYPE args passed using the C calling convention are
 133    passed by invisible reference.  ??? RECORD_TYPE args passed
 134    in the stack are made to be word-aligned; for an aggregate that is
 135    not word-aligned, we advance the pointer to the first non-reg slot.  */
 136
 137   /* When this is a smaller-than-int integer, using
 138      auto-increment in the promoted (SImode) is fastest;
 139      however, there is no way to express that is C.  Therefore,
 140      we use an asm.
 141      We want the MEM_IN_STRUCT_P bit set in the emitted RTL, therefore we
 142      use unions even when it would otherwise be unnecessary.  */
 143
 144 /* gcc has an extension that allows to use a casted lvalue as an lvalue,
 145    But it doesn't work in C++ with -pedantic - even in the presence of
 146    __extension__ .  We work around this problem by using a reference type.  */
 147 #ifdef __cplusplus
 148 #define __VA_REF &
 149 #else
 150 #define __VA_REF
 151 #endif
 152
 153 #define __va_arg_sh1(AP, TYPE) __extension__                            \
 154 ({(sizeof (TYPE) == 1                                                   \
 155    ? ({union {TYPE t; char c;} __t;                                     \
 156        __asm(""                                                         \
 157              : "=r" (__t.c)                                             \
 158              : "0" ((((union { int i, j; } *__VA_REF) (AP))++)->i));    \
 159        __t.t;})                                                         \
 160    : sizeof (TYPE) == 2                                                 \
 161    ? ({union {TYPE t; short s;} __t;                                    \
 162        __asm(""                                                         \
 163              : "=r" (__t.s)                                             \
 164              : "0" ((((union { int i, j; } *__VA_REF) (AP))++)->i));    \
 165        __t.t;})                                                         \
 166    : sizeof (TYPE) >= 4 || __LITTLE_ENDIAN_P                            \
 167    ? (((union { TYPE t; int i;} *__VA_REF) (AP))++)->t                  \
 168    : ((union {TYPE t;TYPE u;}*) ((char *)++(int *__VA_REF)(AP) - sizeof (TYPE)))->t);})
 169
 170 #ifdef __SH3E_VARG
 171
 172 #define __PASS_AS_FLOAT(TYPE_CLASS,SIZE) \
 173   (TYPE_CLASS == __real_type_class && SIZE == 4)
 174
 175 #define __TARGET_SH4_P 0
 176
 177 #if defined(__SH4__) || defined(__SH4_SINGLE__)
 178 #undef __PASS_AS_FLOAT
 179 #define __PASS_AS_FLOAT(TYPE_CLASS,SIZE) \
 180   ((TYPE_CLASS == __real_type_class && SIZE <= 8) \
 181    || (TYPE_CLASS == __complex_type_class && SIZE <= 16))
 182 #undef __TARGET_SH4_P
 183 #define __TARGET_SH4_P 1
 184 #endif
 185
 186 #define va_arg(pvar,TYPE)                                       \
 187 __extension__                                                   \
 188 ({int __type = __builtin_classify_type (* (TYPE *) 0);          \
 189   void * __result_p;                                            \
 190   if (__PASS_AS_FLOAT (__type, sizeof(TYPE)))                   \
 191     {                                                           \
 192       if ((pvar).__va_next_fp < (pvar).__va_next_fp_limit)      \
 193         {                                                       \
 194           if (((__type == __real_type_class && sizeof (TYPE) > 4)\
 195                || sizeof (TYPE) > 8)                            \
 196               && (((int) (pvar).__va_next_fp ^ (int) (pvar).__va_next_fp_limit)\
 197                   & 4))                                         \
 198             (pvar).__va_next_fp++;                              \
 199           __result_p = &(pvar).__va_next_fp;                    \
 200         }                                                       \
 201       else                                                      \
 202         __result_p = &(pvar).__va_next_stack;                   \
 203     }                                                           \
 204   else                                                          \
 205     {                                                           \
 206       if ((pvar).__va_next_o + ((sizeof (TYPE) + 3) / 4)        \
 207           <= (pvar).__va_next_o_limit)                          \
 208         __result_p = &(pvar).__va_next_o;                       \
 209       else                                                      \
 210         {                                                       \
 211           if (sizeof (TYPE) > 4)                                \
 212            if (! __TARGET_SH4_P)                                \
 213             (pvar).__va_next_o = (pvar).__va_next_o_limit;      \
 214                                                                 \
 215           __result_p = &(pvar).__va_next_stack;                 \
 216         }                                                       \
 217     }                                                           \
 218   __va_arg_sh1(*(void **)__result_p, TYPE);})
 219
 220 #else /* ! SH3E */
 221
 222 #define va_arg(AP, TYPE) __va_arg_sh1((AP), TYPE)
 223
 224 #endif /* SH3E */
 225
 226 /* Copy __gnuc_va_list into another variable of this type.  */
 227 #define __va_copy(dest, src) ((dest) = (src))
 228
 229 #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
 230