Ben Shi 69261ecad6 runtime: use hardware divider to improve performance ... The hardware divider is an optional component of ARMv7. This patch detects whether it is available in runtime and use it or not. 1. The hardware divider is detected at startup and a flag is set/clear according to a perticular bit of runtime.hwcap. 2. Each call of runtime.udiv will check this flag and decide if use the hardware division instruction. A rough test shows the performance improves 40-50% for ARMv7. And the compatibility of ARMv5/v6 is not broken. fixes #19118 Change-Id: Ic586bc9659ebc169553ca2004d2bdb721df823ac Reviewed-on: https://go-review.googlesource.com/37496 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>		2017-04-11 12:25:55 +00:00
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dep2	cmd/link: always read type data for dynimport symbols	2016-05-04 07:13:01 +00:00
dep3	cmd/link: always read type data for dynimport symbols	2016-05-04 07:13:01 +00:00
depBase	runtime: reorder modules so main.main comes first	2017-01-25 22:33:57 +00:00
division	runtime: use hardware divider to improve performance	2017-04-11 12:25:55 +00:00
exe	runtime: reorder modules so main.main comes first	2017-01-25 22:33:57 +00:00
exe2	cmd/compile: do not generate tail calls when dynamic linking on ppc64le	2016-06-02 02:34:01 +00:00
exe3	cmd/link: always read type data for dynimport symbols	2016-05-04 07:13:01 +00:00
execgo
explicit
iface	misc/cgo/testshared: test that types and itabs are unique	2017-01-12 00:20:55 +00:00
iface_a	misc/cgo/testshared: test that types and itabs are unique	2017-01-12 00:20:55 +00:00
iface_b	misc/cgo/testshared: test that types and itabs are unique	2017-01-12 00:20:55 +00:00
iface_i	misc/cgo/testshared: test that types and itabs are unique	2017-01-12 00:20:55 +00:00
implicit
implicitcmd
trivial