nanojit/njconfig.cpp

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  39
  40 #include "nanojit.h"
  41
  42 #ifdef FEATURE_NANOJIT
  43
  44 namespace nanojit
  45 {
  46 #ifdef NANOJIT_IA32
  47     static bool CheckForSSE2()
  48     {
  49         int features = 0;
  50     #if defined _MSC_VER
  51         __asm
  52         {
  53             pushad
  54             mov eax, 1
  55             cpuid
  56             mov features, edx
  57             popad
  58         }
  59     #elif defined __GNUC__
  60         asm("xchg %%esi, %%ebx\n" /* we can't clobber ebx on gcc (PIC register) */
  61             "mov $0x01, %%eax\n"
  62             "cpuid\n"
  63             "mov %%edx, %0\n"
  64             "xchg %%esi, %%ebx\n"
  65             : "=m" (features)
  66             : /* We have no inputs */
  67             : "%eax", "%esi", "%ecx", "%edx"
  68            );
  69     #elif defined __SUNPRO_C || defined __SUNPRO_CC
  70         asm("push %%ebx\n"
  71             "mov $0x01, %%eax\n"
  72             "cpuid\n"
  73             "pop %%ebx\n"
  74             : "=d" (features)
  75             : /* We have no inputs */
  76             : "%eax", "%ecx"
  77            );
  78     #endif
  79         return (features & (1<<26)) != 0;
  80     }
  81 #endif
  82
  83     Config::Config()
  84     {
  85         VMPI_memset(this, 0, sizeof(*this));
  86
  87         cseopt = true;
  88
  89 #ifdef NANOJIT_IA32
  90         i386_sse2 = CheckForSSE2();
  91         i386_use_cmov = true;
  92         i386_fixed_esp = false;
  93 #endif
  94
  95 #if defined(NANOJIT_ARM)
  96
  97         // XXX: temporarily disabled, see bug 547063.
  98         //NanoStaticAssert(NJ_COMPILER_ARM_ARCH >= 5 && NJ_COMPILER_ARM_ARCH <= 7);
  99
 100         arm_arch = NJ_COMPILER_ARM_ARCH;
 101         arm_vfp = (arm_arch >= 7);
 102
 103     #if defined(DEBUG) || defined(_DEBUG)
 104         arm_show_stats = true;
 105     #else
 106         arm_show_stats = false;
 107     #endif
 108
 109         soft_float = !arm_vfp;
 110
 111 #endif // NANOJIT_ARM
 112     }
 113 }
 114 #endif /* FEATURE_NANOJIT */