.code64

.global ml_hwrng_available
.type ml_hwrng_available, @function

ml_hwrng_available:
	push %rbp
	mov %rsp, %rbp
	push %rbx
	push %rdx

	mov $1, %eax
	mov $0, %ecx

	cpuid

	shr $30, %ecx
	and $1, %ecx
	mov %ecx, %eax

	pop %rdx
	pop %rbx
	pop %rbp
	ret

.global ml_hwrng_generate
.type ml_hwrng_generate, @function

ml_hwrng_generate:
	push %rbp
	mov %rsp, %rbp

	mov $100, %rcx
.retry:
	rdrand %rax
	jc .done
	loop .retry

.fail:
	mov $0, %rax
.done:
	pop %rbp
	ret