[IA64] Use dynamic prediction for RSE-clearing branches. (9ec1a7ad) · Commits · 戴 / test

This by itself is good for a 1-2 cycle speed up. Effect is bigger when combined with the later patches. Signed-off-by:

arch/ia64/kernel/entry.S

+2 −2

Original line number	Diff line number	Diff line
		@@ -1012,14 +1012,14 @@ rse_clear_invalid:
		mov loc5=0
		mov loc6=0
		mov loc7=0
		(pRecurse) br.call.sptk.few b0=rse_clear_invalid
		(pRecurse) br.call.dptk.few b0=rse_clear_invalid
		;;
		mov loc8=0
		mov loc9=0
		cmp.ne pReturn,p0=r0,in1 // if recursion count != 0, we need to do a br.ret
		mov loc10=0
		mov loc11=0
		(pReturn) br.ret.sptk.many b0
		(pReturn) br.ret.dptk.many b0
		#endif /* !CONFIG_ITANIUM */
		# undef pRecurse
		# undef pReturn