delta/go-git.git/src/runtime/os_plan9_arm.go, branch dev.debug github.com: golang/go runtime: use hardware divider to improve performance 2017-04-11T12:25:55+00:00 Ben Shi powerman1st@163.com 2017-02-27T07:56:57+00:00 69261ecad6dd2f3efd5e4a249325ea27311526b6 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> 
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>
runtime: rename fastrand1 to fastrand 2016-08-30T23:59:21+00:00 Josh Bleecher Snyder josharian@gmail.com 2016-06-28T16:22:46+00:00 2b74de3ed91c495d63868acef0471b0286e7b432 Change-Id: I37706ff0a3486827c5b072c95ad890ea87ede847 Reviewed-on: https://go-review.googlesource.com/28210 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> 
Change-Id: I37706ff0a3486827c5b072c95ad890ea87ede847
Reviewed-on: https://go-review.googlesource.com/28210
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
runtime: new files for plan9_arm support 2016-03-07T16:25:48+00:00 Richard Miller miller.research@gmail.com 2016-01-27T16:31:24+00:00 0de0cafb9f5b20058741c68c8dddf79ffc8492d7 Implementation more or less follows plan9_386 version. Revised 7 March to correct a bug in runtime.seek and tidy whitespace for 8-column tabs. Change-Id: I2e921558b5816502e8aafe330530c5a48a6c7537 Reviewed-on: https://go-review.googlesource.com/18966 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> 
Implementation more or less follows plan9_386 version.
Revised 7 March to correct a bug in runtime.seek and
tidy whitespace for 8-column tabs.

Change-Id: I2e921558b5816502e8aafe330530c5a48a6c7537
Reviewed-on: https://go-review.googlesource.com/18966
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>