sysdeps/powerpc/soft-fp/sfp-machine.h

   1 #define _FP_W_TYPE_SIZE         32
   2 #define _FP_W_TYPE              unsigned long
   3 #define _FP_WS_TYPE             signed long
   4 #define _FP_I_TYPE              long
   5
   6 #define _FP_MUL_MEAT_S(R,X,Y)                           \
   7   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
   8 #define _FP_MUL_MEAT_D(R,X,Y)                           \
   9   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  10 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  11   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  12
  13 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_loop(S,R,X,Y)
  14 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  15 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  16
  17 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
  18 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1), -1
  19 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
  20 #define _FP_NANSIGN_S           0
  21 #define _FP_NANSIGN_D           0
  22 #define _FP_NANSIGN_Q           0
  23
  24 #define _FP_KEEPNANFRACP 1
  25 #define _FP_QNANNEGATEDP 0
  26
  27 /* Someone please check this.  */
  28 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  29   do {                                                          \
  30     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  31         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  32       {                                                         \
  33         R##_s = Y##_s;                                          \
  34         _FP_FRAC_COPY_##wc(R,Y);                                \
  35       }                                                         \
  36     else                                                        \
  37       {                                                         \
  38         R##_s = X##_s;                                          \
  39         _FP_FRAC_COPY_##wc(R,X);                                \
  40       }                                                         \
  41     R##_c = FP_CLS_NAN;                                         \
  42   } while (0)
  43
  44 #define _FP_TININESS_AFTER_ROUNDING 0
  45
  46 #if defined __NO_FPRS__ && !defined _SOFT_FLOAT
  47
  48 /* Exception flags.  We use the bit positions of the appropriate bits
  49    in the FPEFSCR.  */
  50
  51 # include <fenv_libc.h>
  52 # include <sysdep.h>
  53 # include <sys/prctl.h>
  54
  55 int __feraiseexcept_soft (int);
  56 libc_hidden_proto (__feraiseexcept_soft)
  57
  58 # define FP_EX_INEXACT         SPEFSCR_FINXS
  59 # define FP_EX_INVALID         SPEFSCR_FINVS
  60 # define FP_EX_DIVZERO         SPEFSCR_FDBZS
  61 # define FP_EX_UNDERFLOW       SPEFSCR_FUNFS
  62 # define FP_EX_OVERFLOW        SPEFSCR_FOVFS
  63
  64 # define _FP_DECL_EX \
  65   int _spefscr __attribute__ ((unused)), _ftrapex __attribute__ ((unused)) = 0
  66 # define FP_INIT_ROUNDMODE                                              \
  67   do                                                                    \
  68     {                                                                   \
  69       int _r;                                                           \
  70       INTERNAL_SYSCALL_DECL (_err);                                     \
  71                                                                         \
  72       _spefscr = fegetenv_register ();                                  \
  73       _r = INTERNAL_SYSCALL (prctl, _err, 2, PR_GET_FPEXC, &_ftrapex);  \
  74       if (INTERNAL_SYSCALL_ERROR_P (_r, _err))                          \
  75         _ftrapex = 0;                                                   \
  76     }                                                                   \
  77   while (0)
  78 # define FP_INIT_EXCEPTIONS /* Empty.  */
  79
  80 # define FP_HANDLE_EXCEPTIONS  __feraiseexcept_soft (_fex)
  81 # define FP_ROUNDMODE          (_spefscr & 0x3)
  82
  83 /* Not correct in general, but sufficient for the uses in soft-fp.  */
  84 # define FP_TRAPPING_EXCEPTIONS (_ftrapex & PR_FP_EXC_UND       \
  85                                  ? FP_EX_UNDERFLOW              \
  86                                  : 0)
  87
  88 #else
  89
  90 /* Exception flags.  We use the bit positions of the appropriate bits
  91    in the FPSCR, which also correspond to the FE_* bits.  This makes
  92    everything easier ;-).  */
  93 # define FP_EX_INVALID         (1 << (31 - 2))
  94 # define FP_EX_OVERFLOW        (1 << (31 - 3))
  95 # define FP_EX_UNDERFLOW       (1 << (31 - 4))
  96 # define FP_EX_DIVZERO         (1 << (31 - 5))
  97 # define FP_EX_INEXACT         (1 << (31 - 6))
  98
  99 # define FP_HANDLE_EXCEPTIONS  __simulate_exceptions (_fex)
 100 # define FP_ROUNDMODE          __sim_round_mode_thread
 101 # define FP_TRAPPING_EXCEPTIONS \
 102   (~__sim_disabled_exceptions_thread & 0x3e000000)
 103
 104 #endif
 105
 106 extern __thread int __sim_exceptions_thread attribute_tls_model_ie;
 107 libc_hidden_tls_proto (__sim_exceptions_thread, tls_model ("initial-exec"));
 108 extern __thread int __sim_disabled_exceptions_thread attribute_tls_model_ie;
 109 libc_hidden_tls_proto (__sim_disabled_exceptions_thread,
 110                        tls_model ("initial-exec"));
 111 extern __thread int __sim_round_mode_thread attribute_tls_model_ie;
 112 libc_hidden_tls_proto (__sim_round_mode_thread, tls_model ("initial-exec"));
 113
 114 extern void __simulate_exceptions (int x) attribute_hidden;