mono/interpreter/hacks.h

   1 /*
   2  * Attempt at using the goto label construct of GNU GCC:
   3  * it turns out this does give some benefit: 5-15% speedup.
   4  * Don't look at these macros, it hurts...
   5  */
   6 #define GOTO_LABEL
   7 #undef GOTO_LABEL
   8 #ifdef GOTO_LABEL
   9
  10 #define SWITCH(a) goto *goto_map [(a)];
  11 #define BREAK SWITCH(*ip)
  12 #define CASE(l) l ## _LABEL:
  13 #define DEFAULT \
  14         CEE_ILLEGAL_LABEL:      \
  15         CEE_ENDMAC_LABEL:
  16 #define SUB_SWITCH \
  17         CEE_PREFIX1_LABEL: \
  18         CEE_ARGLIST_LABEL: \
  19         CEE_CEQ_LABEL: \
  20         CEE_CGT_LABEL: \
  21         CEE_CGT_UN_LABEL: \
  22         CEE_CLT_LABEL: \
  23         CEE_CLT_UN_LABEL: \
  24         CEE_LDFTN_LABEL: \
  25         CEE_LDVIRTFTN_LABEL: \
  26         CEE_UNUSED56_LABEL: \
  27         CEE_LDARG_LABEL: \
  28         CEE_LDARGA_LABEL: \
  29         CEE_STARG_LABEL: \
  30         CEE_LDLOC_LABEL: \
  31         CEE_LDLOCA_LABEL: \
  32         CEE_STLOC_LABEL: \
  33         CEE_LOCALLOC_LABEL: \
  34         CEE_UNUSED57_LABEL: \
  35         CEE_ENDFILTER_LABEL: \
  36         CEE_UNALIGNED__LABEL: \
  37         CEE_VOLATILE__LABEL: \
  38         CEE_TAIL__LABEL: \
  39         CEE_INITOBJ_LABEL: \
  40         CEE_UNUSED68_LABEL: \
  41         CEE_CPBLK_LABEL: \
  42         CEE_INITBLK_LABEL: \
  43         CEE_UNUSED69_LABEL: \
  44         CEE_RETHROW_LABEL: \
  45         CEE_UNUSED_LABEL: \
  46         CEE_SIZEOF_LABEL: \
  47         CEE_REFANYTYPE_LABEL: \
  48         CEE_UNUSED52_LABEL: \
  49         CEE_UNUSED53_LABEL: \
  50         CEE_UNUSED54_LABEL: \
  51         CEE_UNUSED55_LABEL: \
  52         CEE_UNUSED70_LABEL:
  53 #define GOTO_LABEL_VARS \
  54         const static void * const goto_map [] = {\
  55 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \    \
  56         && a ## _LABEL, \
  57 #include "mono/cil/opcode.def"  \
  58 #undef OPDEF    \
  59         &&DUMMY_LABEL   \
  60         };      \
  61         DUMMY_LABEL:
  62
  63 #else
  64
  65 #define SWITCH(a) switch(a)
  66 #define BREAK   break
  67 #define CASE(l) case l:
  68 #define DEFAULT \
  69                 default:        \
  70                         g_error ("Unimplemented opcode: %x at 0x%x\n", *ip, ip-header->code);
  71 #define SUB_SWITCH case 0xFE:
  72 #define GOTO_LABEL_VARS
  73
  74 #endif