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//===-- HasAVX.s ---------------------------------------*- x86 Assembly -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#if defined (__i386__) || defined (__x86_64__)
.globl _HasAVX
_HasAVX:
#if defined (__x86_64__)
pushq %rbp
movq %rsp, %rbp
pushq %rbx
#else
pushl %ebp
movl %esp, %ebp
pushl %ebx
#endif
mov $1, %eax
cpuid // clobbers ebx
and $0x018000000, %ecx
cmp $0x018000000, %ecx
jne not_supported
mov $0, %ecx
.byte 0x0f, 0x01, 0xd0 // xgetbv, for those assemblers that don't know it
and $0x06, %eax
cmp $0x06, %eax
jne not_supported
mov $1, %eax
jmp done
not_supported:
mov $0, %eax
done:
#if defined (__x86_64__)
popq %rbx
movq %rbp, %rsp
popq %rbp
#else
popl %ebx
movl %ebp, %esp
popl %ebp
#endif
ret // return
#endif
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