sysdeps/sparc/sparc-ifunc.h

   1 /* This file is part of the GNU C Library.
   2    Copyright (C) 2012 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 # else /* SHARED */
  55
  56 # ifdef __arch64__
  57 #  define SET(SYM, TMP, REG)    setx SYM, TMP, REG
  58 # else
  59 #  define SET(SYM, TMP, REG)    set SYM, REG
  60 # endif
  61
  62 #  define SPARC_ASM_IFUNC_DFLT(name, dflt)              \
  63 ENTRY (__##name)                                        \
  64         .type   __##name, @gnu_indirect_function;       \
  65         SET(dflt, %g1, %o1);                            \
  66         retl;                                           \
  67          mov    %o1, %o0;                               \
  68 END (__##name)
  69
  70 #  define SPARC_ASM_IFUNC1(name, m1, f1, dflt)          \
  71 ENTRY (__##name)                                        \
  72         .type   __##name, @gnu_indirect_function;       \
  73         set     m1, %o1;                                \
  74         andcc   %o0, %o1, %g0;                          \
  75         be      9f;                                     \
  76          nop;                                           \
  77         SET(f1, %g1, %o1);                              \
  78         ba      10f;                                    \
  79          nop;                                           \
  80 9:      SET(dflt, %g1, %o1);                            \
  81 10:     retl;                                           \
  82          mov    %o1, %o0;                               \
  83 END (__##name)
  84
  85 # endif /* SHARED */
  86
  87 # ifdef HAVE_AS_VIS3_SUPPORT
  88
  89 #define SPARC_ASM_VIS3_IFUNC(name)                      \
  90         SPARC_ASM_IFUNC1(name, HWCAP_SPARC_VIS3,        \
  91                          __##name##_vis3, __##name##_generic)
  92
  93 # else /* HAVE_AS_VIS3_SUPPORT */
  94
  95 #define SPARC_ASM_VIS3_IFUNC(name)                      \
  96         SPARC_ASM_IFUNC_DFLT(name, __##name##_generic)
  97
  98 # endif /* HAVE_AS_VIS3_SUPPORT */
  99
 100
 101 #else   /* __ASSEMBLER__ */
 102
 103 # define sparc_libm_ifunc(name, expr)                                   \
 104   extern void *name##_ifunc (int) __asm__ (#name);                      \
 105   void *name##_ifunc (int hwcap)                                        \
 106   {                                                                     \
 107     __typeof (name) *res = expr;                                        \
 108     return res;                                                         \
 109   }                                                                     \
 110   __asm__ (".type " #name ", %gnu_indirect_function");
 111
 112 # define sparc_libc_ifunc(name, expr) sparc_libm_ifunc (name, expr)
 113
 114 #endif  /* __ASSEMBLER__ */