Ignored vs Assumed Semantics in BDE

BloombergLP::bbldc::PeriodDayCountUtil::daysDiff(BloombergLP::bdlt::Date const&, BloombergLP::bdlt::Date const&, BloombergLP::bbldc::DayCountConvention::Enum) - Ignored

0000000000404d30 <BloombergLP::bbldc::PeriodDayCountUtil::daysDiff(BloombergLP::bdlt::Date const&, BloombergLP::bdlt::Date const&, BloombergLP::bbldc::DayCountConvention::Enum)>:
M0000000000000000:	movl	(%rsi), %ecx	;  2 bytes
M0000000000000002:	subl	(%rdi), %ecx	;  2 bytes
M0000000000000004:	xorl	%eax, %eax	;  2 bytes
M0000000000000006:	cmpl	$9, %edx	;  3 bytes
M0000000000000009:	cmovel	%ecx, %eax	;  3 bytes
M000000000000000c:	retq		;  1 bytes
M000000000000000d:	nopl	(%rax)	;  3 bytes