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path: root/src/math/export_test.go
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* math: use constant rather than variable for exported test thresholdRobert Griesemer2018-12-131-1/+2
| | | | | | | | | | | | This is a minor follow-up on https://golang.org/cl/153059. TBR=iant Updates #6794. Change-Id: I03657dafc572959d46a03f86bbeb280825bc969d Reviewed-on: https://go-review.googlesource.com/c/153845 Reviewed-by: Robert Griesemer <gri@golang.org>
* math: implement trignometric range reduction for huge argumentsBrian Kessler2018-12-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change implements Payne-Hanek range reduction by Pi/4 to properly calculate trigonometric functions of huge arguments. The implementation is based on: "ARGUMENT REDUCTION FOR HUGE ARGUMENTS: Good to the Last Bit" K. C. Ng et al, March 24, 1992 The major difference with the reference is that the simulated multi-precision calculation of x*B is implemented using 64-bit integer arithmetic rather than floating point to ease extraction of the relevant bits of 4/Pi. The assembly implementations for 386 were removed since the trigonometric instructions only use a 66-bit representation of Pi internally for reduction. It is not possible to use these instructions and maintain accuracy without a prior accurate reduction in software as recommended by Intel. Fixes #6794 Change-Id: I31bf1369e0578891d738c5473447fe9b10560196 Reviewed-on: https://go-review.googlesource.com/c/153059 Reviewed-by: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
* all: make copyright headers consistent with one space after periodBrad Fitzpatrick2016-03-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
* build: move package sources from src/pkg to srcRuss Cox2014-09-081-0/+11
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
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