int main()
{
printf("%s", appnote);
if (!has_cpuid())
{
printf("CPUID instruction is not supported!\n");
return 0;
}
printf("Manufacturer: %s\n", get_manufacturer());
printf("Supported instructions:\n");
if (Has_SSE())
printf("- SSE\n");
if (Has_SSE2())
printf("- SSE2\n");
if (Has_SSE3())
printf("- SSE3\n");
if (Has_SSSE3())
printf("- SSSE3\n");
if (Has_SSE4())
printf("- SSE4 (4.1, 4.2, 4A)\n");
if (Has_MMX())
printf("- MMX\n");
if (Has_3DNow())
printf("- 3DNow!\n");
return 0;
}
void kmain(void)
{
init_bss();
init_ro();
setup_kernel_memory();
setup_pages();
setup_ints();
setup_tss();
setup_paging();
setup_faults();
setup_fs();
setup_syscalls();
init_devs();
char vendor[12];
if (has_cpuid()) {
cpuid_string(0, vendor);
dprintf("CPU Vendor ID: %s\n");
}
fexec("/prgm/start", 0, NULL, NULL);
start_scheduler();
asm volatile ("sti");
asm volatile ("hlt");
/* We should never reach this */
assert(0);
}
int X(have_simd_sse2)(void)
{
static int init = 0, res;
if (!init) {
res = !is_386()
&& has_cpuid()
&& (cpuid_edx(1) & (1 << DS(26,25)))
&& sse2_works();
init = 1;
X(check_alignment_of_sse2_pm)();
}
return res;
}
int RIGHT_CPU(void)
{
static int wav2midi_init = 0, res;
if (!wav2midi_init) {
res = !is_386()
&& has_cpuid()
&& (cpuid_edx(1) & (1 << 26))
&& sse2_works();
wav2midi_init = 1;
X(check_alignment_of_sse2_pm)();
}
return res;
}
int RIGHT_CPU(void)
{
static int init = 0, res;
extern void X(check_alignment_of_sse_pmpm)(void);
if (!init) {
res = !is_386()
&& has_cpuid()
&& (cpuid_edx(1) & (1 << 25))
&& sse_works();
init = 1;
X(check_alignment_of_sse_pmpm)();
}
return res;
}
int X(have_simd_avx2)(void)
{
static int init = 0, res;
if (!init)
{
if(has_cpuid() && ((xgetbv_eax(0) & 0x6) == 0x6))
{
int eax,ebx,ecx,edx;
cpuid_all(7,0,&eax,&ebx,&ecx,&edx);
/* Bit 5 of ebx for CPUID level 7 is AVX2 support */
res = ((ebx & (1 << 5)) != 0 );
}
}
return res;
}
static int has_cpuid(void)
{
int has = 0;
#if defined(__GNUC__) && defined(i386)
__asm__(
"pushfl\n\t"
"popl %%eax\n\t"
"movl %%eax, %%edx\n\t"
"xorl $0x200000, %%eax\n\t"
"pushl %%eax\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %%eax\n\t"
"xorl %%eax, %%edx\n\t"
"jz done\n\t"
"movl $1, %0\n\t"
"done:\n\t"
:"=m"(has)
:
: "%eax", "%edx"
);
#elif defined(__GNUC__) && defined(__x86_64__)
__asm__(
"pushfq\n\t"
"popq %%rax\n\t"
"movq %%rax, %%rdx\n\t"
"xorq $0x200000, %%eax\n\t"
"pushq %%rax\n\t"
"popfq\n\t"
"pushfq\n\t"
"popq %%rax\n\t"
"xorl %%eax, %%edx\n\t"
"jz done\n\t"
"movl $1, %0\n\t"
"done:\n\t"
:"=m"(has)
:
: "%rax", "%rdx"
);
#elif defined(_MSC_VER) && defined(_M_IX86)
__asm {
pushfd
pop eax
mov edx, eax
xor eax, 0x200000
push eax
popfd
pushfd
pop eax
xor edx, eax
jz done
mov has, 1
done:
}
#elif defined(_MSC_VER) && defined(_M_X64)
has = 1;
#endif
return has;
}
int cpuinfo(unsigned int eax, cpu_info_t *cpu)
{
if(!(has_cpuid() && cpu))
return 0;
__cpuid__(eax, cpu->eax, cpu->ebx, cpu->ecx, cpu->edx);
return 1;
}
