njconfig.cpp
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#include "nanojit.h"
#ifdef FEATURE_NANOJIT
namespace nanojit
{
#ifdef NANOJIT_IA32
static int getCpuFeatures()
{
int features = 0;
#if defined _MSC_VER
__asm
{
pushad
mov eax, 1
cpuid
mov features, edx
popad
}
#elif defined __GNUC__
asm("xchg %%esi, %%ebx\n" /* we can't clobber ebx on gcc (PIC register) */
"mov $0x01, %%eax\n"
"cpuid\n"
"mov %%edx, %0\n"
"xchg %%esi, %%ebx\n"
: "=m" (features)
: /* We have no inputs */
: "%eax", "%esi", "%ecx", "%edx"
);
#elif defined __SUNPRO_C || defined __SUNPRO_CC
asm("push %%ebx\n"
"mov $0x01, %%eax\n"
"cpuid\n"
"pop %%ebx\n"
: "=d" (features)
: /* We have no inputs */
: "%eax", "%ecx"
);
#endif
return features;
}
#endif
Config::Config()
{
VMPI_memset(this, 0, sizeof(*this));
cseopt = true;
#ifdef NANOJIT_IA32
int const features = getCpuFeatures();
i386_sse2 = (features & (1<<26)) != 0;
i386_use_cmov = (features & (1<<15)) != 0;
i386_fixed_esp = false;
#endif
harden_function_alignment = false;
harden_nop_insertion = false;
#if defined(NANOJIT_ARM)
NanoStaticAssert(NJ_COMPILER_ARM_ARCH >= 5 && NJ_COMPILER_ARM_ARCH <= 7);
arm_arch = NJ_COMPILER_ARM_ARCH;
arm_vfp = (arm_arch >= 7);
#if defined(DEBUG) || defined(_DEBUG)
arm_show_stats = true;
#else
arm_show_stats = false;
#endif
soft_float = !arm_vfp;
#endif // NANOJIT_ARM
}
}
#endif /* FEATURE_NANOJIT */