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- 20 Aug, 2018 1 commit
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Michael Munday authored
TMLL, LGDR and LDGR have all been added to the Go assembler previously, so we don't need to encode them using WORD and BYTE directives anymore. This is purely a cosmetic change, it does not change the contents of any object files. Change-Id: I93f815b91be310858297d8a0dc9e6d8e3f09dd65 Reviewed-on: https://go-review.googlesource.com/129895 Run-TryBot: Michael Munday <mike.munday@ibm.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 03 Apr, 2018 1 commit
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Michael Munday authored
Floating point test instructions allow special cases (NaN, ±∞ and a few other useful properties) to be checked directly. This CL adds the following instructions to the assembler: * LTEBR - load and test (float32) * LTDBR - load and test (float64) * TCEB - test data class (float32) * TCDB - test data class (float64) Note that I have only added immediate versions of the 'test data class' instructions for now as that's the only case I think the compiler will use. Change-Id: I3398aab2b3a758bf909bd158042234030c8af582 Reviewed-on: https://go-review.googlesource.com/104457Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Michael Munday <mike.munday@ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 08 May, 2017 1 commit
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Bill O'Farrell authored
As necessary, math functions were structured to use stubs, so that they can be accelerated with assembly on any platform. Technique used was minimax polynomial approximation using tables of polynomial coefficients, with argument range reduction. Benchmark New Old Speedup BenchmarkAcos 12.2 47.5 3.89 BenchmarkAcosh 18.5 56.2 3.04 BenchmarkAsin 13.1 40.6 3.10 BenchmarkAsinh 19.4 62.8 3.24 BenchmarkAtan 10.1 23 2.28 BenchmarkAtanh 19.1 53.2 2.79 BenchmarkAtan2 16.5 33.9 2.05 BenchmarkCbrt 14.8 58 3.92 BenchmarkErf 10.8 20.1 1.86 BenchmarkErfc 11.2 23.5 2.10 BenchmarkExp 8.77 53.8 6.13 BenchmarkExpm1 10.1 38.3 3.79 BenchmarkLog 13.1 40.1 3.06 BenchmarkLog1p 12.7 38.3 3.02 BenchmarkPowInt 31.7 40.5 1.28 BenchmarkPowFrac 33.1 141 4.26 BenchmarkTan 11.5 30 2.61 Accuracy was tested against a high precision reference function to determine maximum error. Note: ulperr is error in "units in the last place" max ulperr Acos 1.15 Acosh 1.07 Asin 2.22 Asinh 1.72 Atan 1.41 Atanh 3.00 Atan2 1.45 Cbrt 1.18 Erf 1.29 Erfc 4.82 Exp 1.00 Expm1 2.26 Log 0.94 Log1p 2.39 Tan 3.14 Pow will have 99.99% correctly rounded results with reasonable inputs producing numeric (non Inf or NaN) results Change-Id: I850e8cf7b70426e8b54ec49d74acd4cddc8c6cb2 Reviewed-on: https://go-review.googlesource.com/38585Reviewed-by: Michael Munday <munday@ca.ibm.com> Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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