sysdeps/sparc/sparc-ifunc.h

   1 /* This file is part of the GNU C Library.
   2    Copyright (C) 2012-2013 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20 #ifdef __ASSEMBLER__
  21
  22 # ifdef SHARED
  23
  24 #  define SPARC_ASM_IFUNC_DFLT(name, dflt)              \
  25 ENTRY (__##name)                                        \
  26         .type   __##name, @gnu_indirect_function;       \
  27         SETUP_PIC_REG_LEAF(o3, o5);                     \
  28         sethi   %gdop_hix22(dflt), %o1;                 \
  29         xor     %o1, %gdop_lox10(dflt), %o1;            \
  30         add     %o3, %o1, %o1;                          \
  31         retl;                                           \
  32          mov    %o1, %o0;                               \
  33 END (__##name)
  34
  35 #  define SPARC_ASM_IFUNC1(name, m1, f1, dflt)          \
  36 ENTRY (__##name)                                        \
  37         .type   __##name, @gnu_indirect_function;       \
  38         SETUP_PIC_REG_LEAF(o3, o5);                     \
  39         set     m1, %o1;                                \
  40         andcc   %o0, %o1, %g0;                          \
  41         be      9f;                                     \
  42          nop;                                           \
  43         sethi   %gdop_hix22(f1), %o1;                   \
  44         xor     %o1, %gdop_lox10(f1), %o1;              \
  45         ba      10f;                                    \
  46          nop;                                           \
  47 9:      sethi   %gdop_hix22(dflt), %o1;                 \
  48         xor     %o1, %gdop_lox10(dflt), %o1;            \
  49 10:     add     %o3, %o1, %o1;                          \
  50         retl;                                           \
  51          mov    %o1, %o0;                               \
  52 END (__##name)
  53
  54 #  define SPARC_ASM_IFUNC2(name, m1, f1, m2, f2, dflt)  \
  55 ENTRY (__##name)                                        \
  56         .type   __##name, @gnu_indirect_function;       \
  57         SETUP_PIC_REG_LEAF(o3, o5);                     \
  58         set     m1, %o1;                                \
  59         andcc   %o0, %o1, %g0;                          \
  60         be      8f;                                     \
  61          nop;                                           \
  62         sethi   %gdop_hix22(f1), %o1;                   \
  63         xor     %o1, %gdop_lox10(f1), %o1;              \
  64         ba      10f;                                    \
  65          nop;                                           \
  66 8:      set     m2, %o1;                                \
  67         andcc   %o0, %o1, %g0;                          \
  68         be      9f;                                     \
  69          nop;                                           \
  70         sethi   %gdop_hix22(f2), %o1;                   \
  71         xor     %o1, %gdop_lox10(f2), %o1;              \
  72         ba      10f;                                    \
  73          nop;                                           \
  74 9:      sethi   %gdop_hix22(dflt), %o1;                 \
  75         xor     %o1, %gdop_lox10(dflt), %o1;            \
  76 10:     add     %o3, %o1, %o1;                          \
  77         retl;                                           \
  78          mov    %o1, %o0;                               \
  79 END (__##name)
  80
  81 # else /* SHARED */
  82
  83 # ifdef __arch64__
  84 #  define SET(SYM, TMP, REG)    setx SYM, TMP, REG
  85 # else
  86 #  define SET(SYM, TMP, REG)    set SYM, REG
  87 # endif
  88
  89 #  define SPARC_ASM_IFUNC_DFLT(name, dflt)              \
  90 ENTRY (__##name)                                        \
  91         .type   __##name, @gnu_indirect_function;       \
  92         SET(dflt, %g1, %o1);                            \
  93         retl;                                           \
  94          mov    %o1, %o0;                               \
  95 END (__##name)
  96
  97 #  define SPARC_ASM_IFUNC1(name, m1, f1, dflt)          \
  98 ENTRY (__##name)                                        \
  99         .type   __##name, @gnu_indirect_function;       \
 100         set     m1, %o1;                                \
 101         andcc   %o0, %o1, %g0;                          \
 102         be      9f;                                     \
 103          nop;                                           \
 104         SET(f1, %g1, %o1);                              \
 105         ba      10f;                                    \
 106          nop;                                           \
 107 9:      SET(dflt, %g1, %o1);                            \
 108 10:     retl;                                           \
 109          mov    %o1, %o0;                               \
 110 END (__##name)
 111
 112 #  define SPARC_ASM_IFUNC2(name, m1, f1, m2, f2, dflt)  \
 113 ENTRY (__##name)                                        \
 114         .type   __##name, @gnu_indirect_function;       \
 115         set     m1, %o1;                                \
 116         andcc   %o0, %o1, %g0;                          \
 117         be      8f;                                     \
 118          nop;                                           \
 119         SET(f1, %g1, %o1);                              \
 120         ba      10f;                                    \
 121          nop;                                           \
 122 8:      set     m2, %o1;                                \
 123         andcc   %o0, %o1, %g0;                          \
 124         be      9f;                                     \
 125          nop;                                           \
 126         SET(f2, %g1, %o1);                              \
 127         ba      10f;                                    \
 128          nop;                                           \
 129 9:      SET(dflt, %g1, %o1);                            \
 130 10:     retl;                                           \
 131          mov    %o1, %o0;                               \
 132 END (__##name)
 133
 134 # endif /* SHARED */
 135
 136 #define SPARC_ASM_VIS2_IFUNC(name)                      \
 137         SPARC_ASM_IFUNC1(name, HWCAP_SPARC_VIS2,        \
 138                          __##name##_vis2, __##name##_generic)
 139
 140 # ifdef HAVE_AS_VIS3_SUPPORT
 141
 142 #define SPARC_ASM_VIS3_IFUNC(name)                      \
 143         SPARC_ASM_IFUNC1(name, HWCAP_SPARC_VIS3,        \
 144                          __##name##_vis3, __##name##_generic)
 145
 146 #define SPARC_ASM_VIS3_VIS2_IFUNC(name)                 \
 147         SPARC_ASM_IFUNC2(name, HWCAP_SPARC_VIS3,        \
 148                          __##name##_vis3,               \
 149                          HWCAP_SPARC_VIS2,              \
 150                          __##name##_vis2, __##name##_generic)
 151
 152 # else /* HAVE_AS_VIS3_SUPPORT */
 153
 154 #define SPARC_ASM_VIS3_IFUNC(name)                      \
 155         SPARC_ASM_IFUNC_DFLT(name, __##name##_generic)
 156
 157 #define SPARC_ASM_VIS3_VIS2_IFUNC(name)                 \
 158         SPARC_ASM_VIS2_IFUNC(name)
 159
 160 # endif /* HAVE_AS_VIS3_SUPPORT */
 161
 162
 163 #else   /* __ASSEMBLER__ */
 164
 165 # define sparc_libm_ifunc(name, expr)                                   \
 166   extern void *name##_ifunc (int) __asm__ (#name);                      \
 167   void *name##_ifunc (int hwcap)                                        \
 168   {                                                                     \
 169     __typeof (name) *res = expr;                                        \
 170     return res;                                                         \
 171   }                                                                     \
 172   __asm__ (".type " #name ", %gnu_indirect_function");
 173
 174 # define sparc_libc_ifunc(name, expr) sparc_libm_ifunc (name, expr)
 175
 176 #endif  /* __ASSEMBLER__ */