LXR qemu/include/exec/helper-head.h

   1/* Helper file for declaring TCG helper functions.
   2   Used by other helper files.
   3
   4   Targets should use DEF_HELPER_N and DEF_HELPER_FLAGS_N to declare helper
   5   functions.  Names should be specified without the helper_ prefix, and
   6   the return and argument types specified.  3 basic types are understood
   7   (i32, i64 and ptr).  Additional aliases are provided for convenience and
   8   to match the types used by the C helper implementation.
   9
  10   The target helper.h should be included in all files that use/define
  11   helper functions.  THis will ensure that function prototypes are
  12   consistent.  In addition it should be included an extra two times for
  13   helper.c, defining:
  14    GEN_HELPER 1 to produce op generation functions (gen_helper_*)
  15    GEN_HELPER 2 to do runtime registration helper functions.
  16 */
  17
  18#ifndef DEF_HELPER_H
  19#define DEF_HELPER_H 1
  20
  21
  22#define HELPER(name) glue(helper_, name)
  23
  24#define GET_TCGV_i32 GET_TCGV_I32
  25#define GET_TCGV_i64 GET_TCGV_I64
  26#define GET_TCGV_ptr GET_TCGV_PTR
  27
  28/* Some types that make sense in C, but not for TCG.  */
  29#define dh_alias_i32 i32
  30#define dh_alias_s32 i32
  31#define dh_alias_int i32
  32#define dh_alias_i64 i64
  33#define dh_alias_s64 i64
  34#define dh_alias_f32 i32
  35#define dh_alias_f64 i64
  36#ifdef TARGET_LONG_BITS
  37# if TARGET_LONG_BITS == 32
  38#  define dh_alias_tl i32
  39# else
  40#  define dh_alias_tl i64
  41# endif
  42#endif
  43#define dh_alias_ptr ptr
  44#define dh_alias_void void
  45#define dh_alias_noreturn noreturn
  46#define dh_alias_env ptr
  47#define dh_alias(t) glue(dh_alias_, t)
  48
  49#define dh_ctype_i32 uint32_t
  50#define dh_ctype_s32 int32_t
  51#define dh_ctype_int int
  52#define dh_ctype_i64 uint64_t
  53#define dh_ctype_s64 int64_t
  54#define dh_ctype_f32 float32
  55#define dh_ctype_f64 float64
  56#define dh_ctype_tl target_ulong
  57#define dh_ctype_ptr void *
  58#define dh_ctype_void void
  59#define dh_ctype_noreturn void QEMU_NORETURN
  60#define dh_ctype_env CPUArchState *
  61#define dh_ctype(t) dh_ctype_##t
  62
  63/* We can't use glue() here because it falls foul of C preprocessor
  64   recursive expansion rules.  */
  65#define dh_retvar_decl0_void void
  66#define dh_retvar_decl0_noreturn void
  67#define dh_retvar_decl0_i32 TCGv_i32 retval
  68#define dh_retvar_decl0_i64 TCGv_i64 retval
  69#define dh_retvar_decl0_ptr TCGv_ptr retval
  70#define dh_retvar_decl0(t) glue(dh_retvar_decl0_, dh_alias(t))
  71
  72#define dh_retvar_decl_void
  73#define dh_retvar_decl_noreturn
  74#define dh_retvar_decl_i32 TCGv_i32 retval,
  75#define dh_retvar_decl_i64 TCGv_i64 retval,
  76#define dh_retvar_decl_ptr TCGv_ptr retval,
  77#define dh_retvar_decl(t) glue(dh_retvar_decl_, dh_alias(t))
  78
  79#define dh_retvar_void TCG_CALL_DUMMY_ARG
  80#define dh_retvar_noreturn TCG_CALL_DUMMY_ARG
  81#define dh_retvar_i32 GET_TCGV_i32(retval)
  82#define dh_retvar_i64 GET_TCGV_i64(retval)
  83#define dh_retvar_ptr GET_TCGV_ptr(retval)
  84#define dh_retvar(t) glue(dh_retvar_, dh_alias(t))
  85
  86#define dh_is_64bit_void 0
  87#define dh_is_64bit_noreturn 0
  88#define dh_is_64bit_i32 0
  89#define dh_is_64bit_i64 1
  90#define dh_is_64bit_ptr (sizeof(void *) == 8)
  91#define dh_is_64bit(t) glue(dh_is_64bit_, dh_alias(t))
  92
  93#define dh_is_signed_void 0
  94#define dh_is_signed_noreturn 0
  95#define dh_is_signed_i32 0
  96#define dh_is_signed_s32 1
  97#define dh_is_signed_i64 0
  98#define dh_is_signed_s64 1
  99#define dh_is_signed_f32 0
 100#define dh_is_signed_f64 0
 101#define dh_is_signed_tl  0
 102#define dh_is_signed_int 1
 103/* ??? This is highly specific to the host cpu.  There are even special
 104   extension instructions that may be required, e.g. ia64's addp4.  But
 105   for now we don't support any 64-bit targets with 32-bit pointers.  */
 106#define dh_is_signed_ptr 0
 107#define dh_is_signed_env dh_is_signed_ptr
 108#define dh_is_signed(t) dh_is_signed_##t
 109
 110#define dh_sizemask(t, n) \
 111  ((dh_is_64bit(t) << (n*2)) | (dh_is_signed(t) << (n*2+1)))
 112
 113#define dh_arg(t, n) \
 114  glue(GET_TCGV_, dh_alias(t))(glue(arg, n))
 115
 116#define dh_arg_decl(t, n) glue(TCGv_, dh_alias(t)) glue(arg, n)
 117
 118#define DEF_HELPER_0(name, ret) \
 119    DEF_HELPER_FLAGS_0(name, 0, ret)
 120#define DEF_HELPER_1(name, ret, t1) \
 121    DEF_HELPER_FLAGS_1(name, 0, ret, t1)
 122#define DEF_HELPER_2(name, ret, t1, t2) \
 123    DEF_HELPER_FLAGS_2(name, 0, ret, t1, t2)
 124#define DEF_HELPER_3(name, ret, t1, t2, t3) \
 125    DEF_HELPER_FLAGS_3(name, 0, ret, t1, t2, t3)
 126#define DEF_HELPER_4(name, ret, t1, t2, t3, t4) \
 127    DEF_HELPER_FLAGS_4(name, 0, ret, t1, t2, t3, t4)
 128#define DEF_HELPER_5(name, ret, t1, t2, t3, t4, t5) \
 129    DEF_HELPER_FLAGS_5(name, 0, ret, t1, t2, t3, t4, t5)
 130
 131/* MAX_OPC_PARAM_IARGS must be set to n if last entry is DEF_HELPER_FLAGS_n. */
 132
 133#endif /* DEF_HELPER_H */
 134