include/tcc_predefs.h

   1 #ifdef __x86_64__
   2 #ifndef _WIN64
   3
   4 //This should be in sync with the declaration in our lib/libtcc1.c
   5 /* GCC compatible definition of va_list. */
   6 typedef struct {
   7     unsigned int gp_offset;
   8     unsigned int fp_offset;
   9     union {
  10         unsigned int overflow_offset;
  11         char *overflow_arg_area;
  12     };
  13     char *reg_save_area;
  14 } __builtin_va_list[1];
  15
  16 void *__va_arg(__builtin_va_list ap, int arg_type, int size, int align);
  17
  18 #define __builtin_va_start(ap, last) \
  19     (*(ap) = *(__builtin_va_list)((char*)__builtin_frame_address(0) - 24))
  20 #define __builtin_va_arg(ap, t)   \
  21     (*(t *)(__va_arg(ap, __builtin_va_arg_types(t), sizeof(t), __alignof__(t))))
  22 #define __builtin_va_copy(dest, src) (*(dest) = *(src))
  23
  24 #else /* _WIN64 */
  25 typedef char *__builtin_va_list;
  26 #define __builtin_va_arg(ap, t) ((sizeof(t) > 8 || (sizeof(t) & (sizeof(t) - 1))) \
  27         ? **(t **)((ap += 8) - 8) : *(t  *)((ap += 8) - 8))
  28 #endif
  29
  30 #elif __arm__
  31 typedef char *__builtin_va_list;
  32 #define _tcc_alignof(type) ((int)&((struct {char c;type x;} *)0)->x)
  33 #define _tcc_align(addr,type) (((unsigned)addr + _tcc_alignof(type) - 1) \
  34                                & ~(_tcc_alignof(type) - 1))
  35 #define __builtin_va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  36 #define __builtin_va_arg(ap,type) (ap = (void *) ((_tcc_align(ap,type)+sizeof(type)+3) \
  37                         &~3), *(type *)(ap - ((sizeof(type)+3)&~3)))
  38
  39 #elif defined(__aarch64__)
  40 typedef struct {
  41     void *__stack;
  42     void *__gr_top;
  43     void *__vr_top;
  44     int   __gr_offs;
  45     int   __vr_offs;
  46 } __builtin_va_list;
  47
  48 #elif defined __riscv
  49 typedef char *__builtin_va_list;
  50 #define __va_reg_size (__riscv_xlen >> 3)
  51 #define _tcc_align(addr,type) (((unsigned long)addr + __alignof__(type) - 1) \
  52                                & -(__alignof__(type)))
  53 #define __builtin_va_arg(ap,type) (*(sizeof(type) > (2*__va_reg_size) ? *(type **)((ap += __va_reg_size) - __va_reg_size) : (ap = (va_list)(_tcc_align(ap,type) + (sizeof(type)+__va_reg_size - 1)& -__va_reg_size), (type *)(ap - ((sizeof(type)+ __va_reg_size - 1)& -__va_reg_size)))))
  54
  55 #else /* __i386__ */
  56 typedef char *__builtin_va_list;
  57 #define __builtin_va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  58 #define __builtin_va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
  59 #endif
  60
  61 #ifndef __builtin_va_copy
  62 #define __builtin_va_copy(dest, src) (dest) = (src)
  63 #endif
  64 #define __builtin_va_end(ap) (void)(ap)