libgcc/config/pa/sfp-machine.h

   1 /* softfp machine description for PA-RISC.
   2    Copyright (C) 2009-2024 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #ifdef __LP64__
  26 #define _FP_W_TYPE_SIZE         64
  27 #define _FP_W_TYPE              unsigned long
  28 #define _FP_WS_TYPE             signed long
  29 #define _FP_I_TYPE              long
  30
  31 typedef int TItype __attribute__ ((mode (TI)));
  32 typedef unsigned int UTItype __attribute__ ((mode (TI)));
  33 #define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype))
  34
  35 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  36   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  37 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  38   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  39 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  40   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  41
  42 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
  43 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
  44 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
  45
  46 #define _FP_NANFRAC_S           (_FP_QNANBIT_S - 1)
  47 #define _FP_NANFRAC_D           (_FP_QNANBIT_D - 1)
  48 #define _FP_NANFRAC_Q           (_FP_QNANBIT_Q - 1), -1
  49 #else
  50 #define _FP_W_TYPE_SIZE         32
  51 #define _FP_W_TYPE              unsigned int
  52 #define _FP_WS_TYPE             signed int
  53 #define _FP_I_TYPE              int
  54
  55 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  56   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  57 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  58   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  59 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  60   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  61
  62 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
  63 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  64 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  65
  66 #define _FP_NANFRAC_S           (_FP_QNANBIT_S - 1)
  67 #define _FP_NANFRAC_D           (_FP_QNANBIT_D - 1), -1
  68 #define _FP_NANFRAC_Q           (_FP_QNANBIT_Q - 1), -1, -1, -1
  69 #endif
  70
  71 /* The type of the result of a floating point comparison.  This must
  72    match __libgcc_cmp_return__ in GCC for the target.  */
  73 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
  74 #define CMPtype __gcc_CMPtype
  75
  76 #define _FP_NANSIGN_S           0
  77 #define _FP_NANSIGN_D           0
  78 #define _FP_NANSIGN_Q           0
  79
  80 #define _FP_KEEPNANFRACP        1
  81 #define _FP_QNANNEGATEDP        1
  82
  83 /* Comment from glibc: */
  84 /* From my experiments it seems X is chosen unless one of the
  85    NaNs is sNaN,  in which case the result is NANSIGN/NANFRAC.  */
  86 # define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                     \
  87   do {                                                          \
  88     if ((_FP_FRAC_HIGH_RAW_##fs(X) |                            \
  89          _FP_FRAC_HIGH_RAW_##fs(Y)) & _FP_QNANBIT_##fs)         \
  90       {                                                         \
  91         R##_s = _FP_NANSIGN_##fs;                               \
  92         _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs);                  \
  93       }                                                         \
  94     else                                                        \
  95       {                                                         \
  96         R##_s = X##_s;                                          \
  97         _FP_FRAC_COPY_##wc(R,X);                                \
  98       }                                                         \
  99     R##_c = FP_CLS_NAN;                                         \
 100   } while (0)
 101
 102 #define FP_RND_NEAREST          (0 << 9)
 103 #define FP_RND_ZERO             (1 << 9)
 104 #define FP_RND_PINF             (2 << 9)
 105 #define FP_RND_MINF             (3 << 9)
 106 #define FP_RND_MASK             (3 << 9)
 107
 108 #define FP_EX_INEXACT           0x01
 109 #define FP_EX_UNDERFLOW         0x02
 110 #define FP_EX_OVERFLOW          0x04
 111 #define FP_EX_DIVZERO           0x08
 112 #define FP_EX_INVALID           0x10
 113 #define FP_EX_ALL               0x1F
 114 #define FP_EX_SHIFT             27
 115
 116 #define _FP_TININESS_AFTER_ROUNDING 1
 117
 118 #define _FP_DECL_EX \
 119   unsigned int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST
 120
 121 /* Get floating-point status.  */
 122 #define _FPU_GETCW(cw)                                          \
 123 ({                                                              \
 124   union { unsigned long long __fpreg;                           \
 125           unsigned int __halfreg[2]; } __fullfp;                \
 126   /* Get the current status word. */                            \
 127   __asm__ ("fstd %%fr0,0(%1)\n\t"                               \
 128            "fldd 0(%1),%%fr0\n\t"                               \
 129             : "=m" (__fullfp.__fpreg)                           \
 130             : "r" (&__fullfp.__fpreg)                           \
 131             : "%r0");                                           \
 132   cw = __fullfp.__halfreg[0];                                   \
 133 })
 134
 135 #define FP_INIT_ROUNDMODE _FPU_GETCW(_fcsr)
 136 #define FP_ROUNDMODE (_fcsr & FP_RND_MASK)
 137 #define FP_TRAPPING_EXCEPTIONS (_fcsr & FP_EX_ALL)
 138
 139 void __sfp_handle_exceptions (int);
 140
 141 #define FP_HANDLE_EXCEPTIONS                            \
 142   do {                                                  \
 143     if (__builtin_expect (_fex, 0))                     \
 144       __sfp_handle_exceptions (_fex);                   \
 145   } while (0)
 146
 147 #define __LITTLE_ENDIAN 1234
 148 #define __BIG_ENDIAN    4321
 149
 150 #define __BYTE_ORDER __BIG_ENDIAN
 151
 152 /* Define ALIASNAME as a strong alias for NAME.  */
 153 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 154 # define _strong_alias(name, aliasname) \
 155   extern __typeof (name) aliasname __attribute__ ((alias (#name)));