arch/ppc/math-emu/single.h

   1 /*
   2  * Definitions for IEEE Single Precision
   3  */
   4
   5 #if _FP_W_TYPE_SIZE < 32
   6 #error "Here's a nickel kid.  Go buy yourself a real computer."
   7 #endif
   8
   9 #define _FP_FRACBITS_S          24
  10 #define _FP_FRACXBITS_S         (_FP_W_TYPE_SIZE - _FP_FRACBITS_S)
  11 #define _FP_WFRACBITS_S         (_FP_WORKBITS + _FP_FRACBITS_S)
  12 #define _FP_WFRACXBITS_S        (_FP_W_TYPE_SIZE - _FP_WFRACBITS_S)
  13 #define _FP_EXPBITS_S           8
  14 #define _FP_EXPBIAS_S           127
  15 #define _FP_EXPMAX_S            255
  16 #define _FP_QNANBIT_S           ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
  17 #define _FP_IMPLBIT_S           ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
  18 #define _FP_OVERFLOW_S          ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
  19
  20 /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
  21    chosen by the target machine.  */
  22
  23 union _FP_UNION_S
  24 {
  25   float flt;
  26   struct {
  27 #if __BYTE_ORDER == __BIG_ENDIAN
  28     unsigned sign : 1;
  29     unsigned exp  : _FP_EXPBITS_S;
  30     unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
  31 #else
  32     unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
  33     unsigned exp  : _FP_EXPBITS_S;
  34     unsigned sign : 1;
  35 #endif
  36   } bits __attribute__((packed));
  37 };
  38
  39 #define FP_DECL_S(X)            _FP_DECL(1,X)
  40 #define FP_UNPACK_RAW_S(X,val)  _FP_UNPACK_RAW_1(S,X,val)
  41 #define FP_PACK_RAW_S(val,X)    _FP_PACK_RAW_1(S,val,X)
  42
  43 #define FP_UNPACK_S(X,val)              \
  44   do {                                  \
  45     _FP_UNPACK_RAW_1(S,X,val);          \
  46     _FP_UNPACK_CANONICAL(S,1,X);        \
  47   } while (0)
  48
  49 #define FP_PACK_S(val,X)                \
  50   do {                                  \
  51     _FP_PACK_CANONICAL(S,1,X);          \
  52     _FP_PACK_RAW_1(S,val,X);            \
  53   } while (0)
  54
  55 #define FP_NEG_S(R,X)           _FP_NEG(S,1,R,X)
  56 #define FP_ADD_S(R,X,Y)         _FP_ADD(S,1,R,X,Y)
  57 #define FP_SUB_S(R,X,Y)         _FP_SUB(S,1,R,X,Y)
  58 #define FP_MUL_S(R,X,Y)         _FP_MUL(S,1,R,X,Y)
  59 #define FP_DIV_S(R,X,Y)         _FP_DIV(S,1,R,X,Y)
  60 #define FP_SQRT_S(R,X)          _FP_SQRT(S,1,R,X)
  61
  62 #define FP_CMP_S(r,X,Y,un)      _FP_CMP(S,1,r,X,Y,un)
  63 #define FP_CMP_EQ_S(r,X,Y)      _FP_CMP_EQ(S,1,r,X,Y)
  64
  65 #define FP_TO_INT_S(r,X,rsz,rsg)  _FP_TO_INT(S,1,r,X,rsz,rsg)
  66 #define FP_FROM_INT_S(X,r,rs,rt)  _FP_FROM_INT(S,1,X,r,rs,rt)