sysdeps/tile/sysdep.h

   1 /* Copyright (C) 2011 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdeps/generic/sysdep.h>
  20 #include <bits/wordsize.h>
  21 #include <arch/abi.h>
  22
  23 #if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
  24
  25 #include <feedback.h>
  26
  27 /* Make use of .type and .size directives.  */
  28 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
  29 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
  30
  31 /* Define an entry point visible from C.  */
  32 #define ENTRY(name)                                                           \
  33   ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
  34   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
  35   .align 8;                                                                   \
  36   C_LABEL(name)                                                               \
  37   cfi_startproc;                                                              \
  38   CALL_MCOUNT
  39
  40 #undef  END
  41 #define END(name)                                                             \
  42   cfi_endproc;                                                                \
  43   ASM_SIZE_DIRECTIVE(name)
  44
  45 /* Since C identifiers are not normally prefixed with an underscore
  46    on this system, the asm identifier `syscall_error' intrudes on the
  47    C name space.  Make sure we use an innocuous name.  */
  48 #define syscall_error   __syscall_error
  49 #define mcount          __mcount
  50
  51 /* If compiled for profiling, call `mcount' at the start of each function.
  52    The mcount code requires the caller PC in r10.  The `mcount' function
  53    sets lr back to the value r10 had on entry when it returns.  */
  54 #ifdef  PROF
  55 #define CALL_MCOUNT { move r10, lr; jal mcount }
  56 #else
  57 #define CALL_MCOUNT             /* Do nothing.  */
  58 #endif
  59
  60 /* Local label name for asm code. */
  61 #define L(name)         .L##name
  62
  63 /* Specify the size in bytes of a machine register.  */
  64 #ifdef __tilegx__
  65 #define REGSIZE         8
  66 #else
  67 #define REGSIZE         4
  68 #endif
  69
  70 /* Support a limited form of shared assembly between tile and tilegx.
  71    The presumption is that LD/ST are used for manipulating registers.
  72    Since opcode parsing is case-insensitive, we don't need to provide
  73    definitions for these on tilegx.  */
  74 #ifndef __tilegx__
  75 #define LD              lw
  76 #define LD4U            lw
  77 #define ST              sw
  78 #define ST4             sw
  79 #define BNEZ            bnz
  80 #define BEQZ            bz
  81 #define BEQZT           bzt
  82 #define BGTZ            bgz
  83 #define CMPEQI          seqi
  84 #define CMPEQ           seq
  85 #define CMOVEQZ         mvz
  86 #define CMOVNEZ         mvnz
  87 #endif
  88
  89 /* Provide "pointer-oriented" instruction variants.  These differ not
  90    just for tile vs tilegx, but also for tilegx -m64 vs -m32.  */
  91 #if defined __tilegx__ && __WORDSIZE == 32
  92 #define ADD_PTR         addx
  93 #define ADDI_PTR        addxi
  94 #define ADDLI_PTR       addxli
  95 #define LD_PTR          ld4s
  96 #define ST_PTR          st4
  97 #define SHL_PTR_ADD     shl2add
  98 #else
  99 #define ADD_PTR         add
 100 #define ADDI_PTR        addi
 101 #define ADDLI_PTR       addli
 102 #define LD_PTR          LD
 103 #define ST_PTR          ST
 104 #ifdef __tilegx__
 105 #define SHL_PTR_ADD     shl3add
 106 #else
 107 #define SHL_PTR_ADD     s2a
 108 #endif
 109 #endif
 110
 111 #endif /* __ASSEMBLER__ */