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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errors	cmd/compile: print columns (not just lines) in error messages	2017-03-09 23:29:49 +00:00
fortran	*.bash: always use the same string equality operator	2017-03-14 21:46:31 +00:00
gmp	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
life	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nocgo
stdio	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
test	cmd/cgo: support floating point #define macros	2017-04-07 21:09:44 +00:00
testasan
testcarchive	misc/cgo/testcarchive: add missing header	2017-03-09 16:42:46 +00:00
testcshared	runtime: use hardware divider to improve performance	2017-04-11 12:25:55 +00:00
testgodefs	cmd/cgo: add -srcdir option	2016-10-30 19:14:08 +00:00
testplugin	runtime: for plugins, don't add duplicate itabs	2017-01-17 22:37:19 +00:00
testsanitizers	*.bash: always use the same string equality operator	2017-03-14 21:46:31 +00:00
testshared	runtime: use hardware divider to improve performance	2017-04-11 12:25:55 +00:00
testsigfwd	misc/cgo/testsigfwd: add missing return statement	2016-08-30 21:44:14 +00:00
testso	cmd/dist: convert testso test into Go	2015-06-12 04:33:50 +00:00
testsovar	misc/cgo/testsovar: needs the extern keyword to export variables on non-windows platforms	2015-07-21 18:10:57 +00:00
testtls	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00