gcc/testsuite/gcc.target/i386/iamcu/args.h

   1 #ifndef INCLUDED_ARGS_H
   2 #define INCLUDED_ARGS_H
   3
   4 /* This defines the calling sequences for integers and floats.  */
   5 #define I0 eax
   6 #define I1 edx
   7 #define I2 ecx
   8
   9 typedef unsigned int size_t;
  10
  11 extern void (*callthis)(void);
  12 extern unsigned long eax,ebx,ecx,edx,esi,edi,esp,ebp;
  13 extern unsigned long sret_eax;
  14 extern volatile unsigned long volatile_var;
  15 extern void snapshot (void);
  16 extern void snapshot_ret (void);
  17 extern void *iamcu_memset (void *, int, size_t);
  18 #define WRAP_CALL(N) \
  19   (callthis = (void (*)()) (N), (typeof (&N)) snapshot)
  20 #define WRAP_RET(N) \
  21   (callthis = (void (*)()) (N), (typeof (&N)) snapshot_ret)
  22
  23 /* Clear all scratch integer registers.  */
  24 #define clear_int_hardware_registers \
  25   asm __volatile__ ("xor %%eax, %%eax\n\t" \
  26                     "xor %%edx, %%edx\n\t" \
  27                     "xor %%ecx, %%ecx\n\t" \
  28                     ::: "eax", "edx", "ecx");
  29
  30 /* Clear all scratch integer registers, excluding the one used to return
  31    aggregate.  */
  32 #define clear_non_sret_int_hardware_registers \
  33   asm __volatile__ ("xor %%edx, %%edx\n\t" \
  34                     "xor %%ecx, %%ecx\n\t" \
  35                     ::: "edx", "ecx");
  36
  37 /* This is the list of registers available for passing arguments. Not all of
  38    these are used or even really available.  */
  39 struct IntegerRegisters
  40 {
  41   unsigned long eax, ebx, ecx, edx, esi, edi;
  42 };
  43
  44 /* Implemented in scalarargs.c  */
  45 extern struct IntegerRegisters iregs, iregbits;
  46 extern unsigned int num_iregs;
  47
  48 #define check_int_arguments do { \
  49   assert (num_iregs <= 0 || (iregs.I0 & iregbits.I0) == (I0 & iregbits.I0)); \
  50   assert (num_iregs <= 1 || (iregs.I1 & iregbits.I1) == (I1 & iregbits.I1)); \
  51   assert (num_iregs <= 2 || (iregs.I2 & iregbits.I2) == (I2 & iregbits.I2)); \
  52   } while (0)
  53
  54 #define check_char_arguments check_int_arguments
  55 #define check_short_arguments check_int_arguments
  56 #define check_long_arguments check_int_arguments
  57 #define check_float_arguments check_int_arguments
  58 #define check_double_arguments check_int_arguments
  59 #define check_ldouble_arguments check_int_arguments
  60
  61 /* Clear register struct.  */
  62 #define clear_struct_registers \
  63   eax = edx = ecx = 0; \
  64   iamcu_memset (&iregs, 0, sizeof iregs);
  65
  66 /* Clear both hardware and register structs for integers.  */
  67 #define clear_int_registers \
  68   clear_struct_registers \
  69   clear_int_hardware_registers
  70
  71 /* Clear both hardware and register structs for integers, excluding the
  72    one used to return aggregate.  */
  73 #define clear_non_sret_int_registers \
  74   clear_struct_registers \
  75   clear_non_sret_int_hardware_registers
  76
  77 #endif /* INCLUDED_ARGS_H  */