third_party/ulib/musl/src/math/x86_64/fabs.S

.global fabs
.type fabs,@function
fabs:
	.cfi_startproc
	xor %eax,%eax
	dec %rax
	shr %rax
	movq %rax,%xmm1
	andpd %xmm1,%xmm0
	ret
	.cfi_endproc