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75 Commits

Author SHA1 Message Date
Robert Griesemer 79c12958c7 math/big: export Float.MinPrec 
MinPrec returns the minimum precision required to represent a Float
without loss of precision. Added test.

Change-Id: I466c8e492dcdd59fae854fc4e71ef9b1add7d817
Reviewed-on: https://go-review.googlesource.com/6010
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-26 17:01:16 +00:00
Robert Griesemer 9c4aade584 math/big: fix build for 32bit platforms 
Change-Id: I9c217e5140294a17e4feb65da5b121ee8d8cadc2
Reviewed-on: https://go-review.googlesource.com/6050
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2015-02-26 00:15:04 +00:00
Robert Griesemer ca0be6f849 math/big: clean up Float.SetPrec, use shorter internal representation 
Change-Id: I9b78085adc12cbd240d0b8b48db6810ddb2aeadd
Reviewed-on: https://go-review.googlesource.com/5991
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-25 23:10:44 +00:00
Robert Griesemer c20a018d6f math/big: apply a round of go vet 
Change-Id: Ie8310acc783659497e50dfe629f06d655b51d647
Reviewed-on: https://go-review.googlesource.com/5990
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-25 23:10:14 +00:00
Robert Griesemer bba8b89aa5 math/big: improve some doc strings 
Change-Id: Ie37673d4af2fa7476d67ffb686641611ab6a8e6b
Reviewed-on: https://go-review.googlesource.com/5930
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-25 23:09:51 +00:00
Robert Griesemer 88cbe09202 math/big: permit passing of an *Int to Float.Int to avoid allocation 
Change-Id: I50e83248357928e56c94b88a8764de828f4f5c76
Reviewed-on: https://go-review.googlesource.com/5890
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-25 18:10:42 +00:00
Robert Griesemer 3e9e9b4822 math/big: implemented Float.Rat 
Change-Id: If516e12d4b5dfb6f9288437d270569f7e4e2a1cd
Reviewed-on: https://go-review.googlesource.com/5871
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-25 16:53:28 +00:00
Robert Griesemer 18fd940620 math/big: permit passing of (possibly nil) *Float to MantExp to avoid allocation 
Change-Id: Ia92eea833283f8b16fa09d4ca1c9cb3bc0eb18a2
Reviewed-on: https://go-review.googlesource.com/5870
Reviewed-by: Rob Pike <r@golang.org>
 2015-02-25 00:46:27 +00:00
Robert Griesemer c4b8f9127a math/big: fix test for 32bit platforms (fix build) 
Change-Id: I73509cd0e0866cfe2b2ae46a26fb4d043dd050c4
Reviewed-on: https://go-review.googlesource.com/5840
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2015-02-24 21:58:00 +00:00
Robert Griesemer c651fdc0cf math/big: change Float.SetMantExp to always multiply mant by 2**exp 
Change-Id: If840e647376a2141f8c17729f7ef251bfff13f5f
Reviewed-on: https://go-review.googlesource.com/5810
Reviewed-by: Rob Pike <r@golang.org>
 2015-02-24 21:30:04 +00:00
Robert Griesemer d9859ad404 math/big: fix several issues with string->Float conversion 
Change-Id: I7bf7154e2d8d779fdf7f1d2bb561a06ad174f3b0
Reviewed-on: https://go-review.googlesource.com/4883
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-24 17:35:25 +00:00
Charlie Dorian ec92af650c math: Dim, Max, Min - allow more bit patterns for NaN 
Fixes #9919

Change-Id: Ib443c762f727d4986ca7f8a404362f92b0e91aff
Reviewed-on: https://go-review.googlesource.com/5553
Reviewed-by: Minux Ma <minux@golang.org>
 2015-02-23 23:07:01 +00:00
Robert Griesemer ce137592c0 math/big: fix formatting for 'b' format 
Fixes #9939.

Change-Id: I9d60722b648fbc00650115da539a7466c6c86552
Reviewed-on: https://go-review.googlesource.com/5640
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-23 21:23:50 +00:00
Charles Dorian b48d2a5f25 math: faster Cbrt 
Old 45.3 ns/op, new 19.9 ns/op.

Change-Id: If2a201981dcc259846631ecbc694c401e0a80287
Reviewed-on: https://go-review.googlesource.com/5260
Reviewed-by: Russ Cox <rsc@golang.org>
 2015-02-23 21:04:46 +00:00
Robert Griesemer 6a10f720f2 math/big: don't return io.EOF on successful call of ParseFloat 
Fixes $9938.

Change-Id: Ie8680a875225748abd660fb26b4c25546e7b92d3
Reviewed-on: https://go-review.googlesource.com/5620
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-23 19:20:15 +00:00
Robert Griesemer 2b0213d569 math/big: incorporated feedback from prior TBR reviews 
Change-Id: Ida847365223ef09b4a3846e240b4bb6919cb0fe9
Reviewed-on: https://go-review.googlesource.com/5610
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-23 18:09:36 +00:00
Ivan Ukhov 277eddb8f2 math: change Nextafter64 to Nextafter in the description of Nextafter 
Change-Id: I3419d6247fbff36aa1ed5451bb3cfb7502c3d07e
Reviewed-on: https://go-review.googlesource.com/5030
Reviewed-by: David Crawshaw <crawshaw@golang.org>
 2015-02-17 14:29:18 +00:00
Robert Griesemer 61c9c3ddc4 math/big: implement fast path in Float.SetRat if argument is integer 
Change-Id: Ib82500e198b86e9fade278c7eea7a4b0c6b0b2e1
Reviewed-on: https://go-review.googlesource.com/4921
Reviewed-by: Rob Pike <r@golang.org>
 2015-02-15 20:11:00 +00:00
Robert Griesemer 2dd7a6d41f math/big: always round after the sign is set 
Some rounding modes are affected by the sign of the value to
be rounded. Make sure the sign is set before round is called.
Added tests (that failed before the fix).

Change-Id: Idd09b8fcbab89894fede0b9bc922cda5ddc87930
Reviewed-on: https://go-review.googlesource.com/4876
Reviewed-by: Rob Pike <r@golang.org>
 2015-02-15 05:14:05 +00:00
Robert Griesemer b7bfb54eaa math/big: fix aliasing bug in Float.Quo 
TBR r, adonovan

Change-Id: I1a38e2d724bf1147c7307a7e5ae855c42c60428c
Reviewed-on: https://go-review.googlesource.com/4875
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 04:22:56 +00:00
Robert Griesemer a809dc7adb math/big: don't scan past a binary exponent if not accepted syntactically 
TBR adonovan

Change-Id: I842cbc855dbd560f65e76c9a557dff1a22c5d610
Reviewed-on: https://go-review.googlesource.com/4882
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 01:01:19 +00:00
Robert Griesemer ccdbfe3174 math/big: only permit bases 2, 10, 16 when scanning number w/ "decimal" point 
TBR adonovan

Change-Id: I4fd694101c2cf1c0c39bf73d16cab18502742dd9
Reviewed-on: https://go-review.googlesource.com/4881
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 01:00:30 +00:00
Robert Griesemer 2e3c738649 math/big: remove Float.Round (not needed anymore), fix a bug in SetInt64 
TBR adonovan

Change-Id: I30020f39be9183b37275e10a4fd1e1a3b4c48c89
Reviewed-on: https://go-review.googlesource.com/4880
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 00:43:07 +00:00
Robert Griesemer df218d3393 math/big: implement/rename accessors for precision and rounding mode 
Also: remove NewFloat - not needed anymore. Work-around for places
where has been used so far:

NewFloat(x, prec, mode) === new(Float).SetMode(mode).SetPrec(prec).SetFloat64(x)

However, if mode == ToNearestEven, SetMode is not needed. SetPrec
is needed if the default precision (53 after SetFloat64) is not
adequate.

TBR adonovan

Change-Id: Ifda12c479ba157f2dea306c32b47c7afbf31e759
Reviewed-on: https://go-review.googlesource.com/4842
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 00:42:40 +00:00
Robert Griesemer 31e852402f math/big: fix aliasing error in Add, Sub 
Also:
- make representation more flexible (no need to store trailing 0 digits to match precision)
- simplify rounding as a consequence
- minor related fixes

TBR adonovan

Change-Id: Ie91075990688b506d28371ec3b633b8267397ebb
Reviewed-on: https://go-review.googlesource.com/4841
Reviewed-by: Rob Pike <r@golang.org>
 2015-02-14 00:42:05 +00:00
Robert Griesemer 7a77d8d1e9 math/big: use internal validation more consistently 
TBR adonovan

Change-Id: If77afa6474af6cad6512f6866725e3ae5acf2e3f
Reviewed-on: https://go-review.googlesource.com/4840
Reviewed-by: Robert Griesemer <gri@golang.org>
 2015-02-14 00:41:20 +00:00
Robert Griesemer 9e9ddb004f math/big: implemented Float.Int64, simplified Float.Uint64 
Change-Id: Ic270ffa7ec6f6dd4b0a951c64ad965447cce1417
Reviewed-on: https://go-review.googlesource.com/4571
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-12 20:59:02 +00:00
Robert Griesemer 764a9cf20d math/big: completed Float.Uint64 
Change-Id: Ib3738492a2ec8fc99323e687168b17b7239db6ad
Reviewed-on: https://go-review.googlesource.com/4511
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-11 17:03:08 +00:00
Robert Griesemer 15fe15a198 math/big: add test cases for Float.Abs and Float.Neg 
Change-Id: Ic5f3864bc6d94d60b754e3ccf72b1d40c5c09117
Reviewed-on: https://go-review.googlesource.com/4510
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-11 17:02:54 +00:00
Robert Griesemer 64e7038291 math/big: implemented Float.Int (truncation of Floats to Ints) 
Change-Id: Id98f7333fe6ae1b64e0469c6d01f02360c1f8f55
Reviewed-on: https://go-review.googlesource.com/4481
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-11 17:02:35 +00:00
Robert Griesemer 950aa9f1bc math/big: When result prec == 0, use at least prec == 64 for SetInt, SetRat. 
This avoids surprises.

Change-Id: Iaae67da2d12e29c4e797ad6313e0895f7ce80cb1
Reviewed-on: https://go-review.googlesource.com/4480
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-11 17:02:09 +00:00
Robert Griesemer f77696a7f0 math/big: implemented Frexp, Ldexp, IsInt, Copy, bug fixes, more tests 
- Frexp, Ldexp are equivalents to the corresponding math functions.
- Set now has the same prec behavior as the other functions
- Copy is a true assignment (replaces old version of Set)
- Cmp now handles infinities
- more tests

Change-Id: I0d33980c08be3095b25d7b3d16bcad1aa7abbd0f
Reviewed-on: https://go-review.googlesource.com/4292
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-10 19:08:53 +00:00
Robert Griesemer 04ce9dbf35 math/big: correct umax 
Change-Id: I208c8ac44d1a8882d8fdeb18347dc20941e20374
Reviewed-on: https://go-review.googlesource.com/4250
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-09 19:32:12 +00:00
Robert Griesemer acfe3a59bd math/big: API cleanup 
- better and more consistent documentation
- more functions implemented
- more tests

Change-Id: If4c591e7af4ec5434fbb411a48dd0f8add993720
Reviewed-on: https://go-review.googlesource.com/4140
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-09 17:53:18 +00:00
Robert Griesemer 15594df6b4 math/big: handling of +/-Inf and zero precision, enable zero values 
- clarified representation of +/-Inf
- only 0 and Inf values can have 0 precision
- a zero precision value used as result value takes the max precision
  of the arguments (to be fine-tuned for setters)
- the zero precision approach makes Float zero values possible
  (they represent +0)
- more tests

Missing: Filling in the blanks. More tests.

Change-Id: Ibb4f97e12e1f356c3085ce80f3464e97b82ac130
Reviewed-on: https://go-review.googlesource.com/4000
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-06 17:21:01 +00:00
Péter Surányi 9b6ccb1323 all: don't refer to code.google.com/p/go{,-wiki}/ 
Only documentation / comment changes. Update references to
point to golang.org permalinks or go.googlesource.com/go.
References in historical release notes under doc are left as is.

Change-Id: Icfc14e4998723e2c2d48f9877a91c5abef6794ea
Reviewed-on: https://go-review.googlesource.com/4060
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2015-02-06 14:41:47 +00:00
Robert Griesemer f083a0e364 math/big: add "smoke test" for big.Float division 
Change-Id: Ica419a1215ca33dc1cff1e9e4137f204591e3cee
Reviewed-on: https://go-review.googlesource.com/3942
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-05 22:22:28 +00:00
Robert Griesemer 91c0f006fc math/big: more Float conversion tests 
Change-Id: Ia30886569141ca2e0321bea6ee1d5c9e0f79d6f9
Reviewed-on: https://go-review.googlesource.com/3941
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-05 22:21:01 +00:00
Robert Griesemer 57c1485fd9 math/big: simplified formatting logic 
Change-Id: I4329c44b829fcd77e4f1a1d45904f0f8a280a595
Reviewed-on: https://go-review.googlesource.com/3940
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-05 22:19:42 +00:00
Robert Griesemer 721d5893d7 math/big: first version of Float %e, %f, %g, %G formatting working 
Change-Id: I10efa3bc8bc7f41100feabe17837f805a42d7eb6
Reviewed-on: https://go-review.googlesource.com/3842
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-04 21:11:51 +00:00
Robert Griesemer b8fcae02b0 math/big: fix %b format so it matches strconf %b format for non-zero values 
(For zero values the strconv %b format prints the bias-adjusted exponent;
there's no bias in Float.)

Change-Id: I6f4dda9c3a50d02eac375cfe2c927c1540aae865
Reviewed-on: https://go-review.googlesource.com/3841
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-04 21:07:37 +00:00
Robert Griesemer bbd6771621 math/big: implemented decimal rounding for Float-to-string conversion 
Change-Id: Id508ca2f6c087861e8c6bc536bc39e54dce09825
Reviewed-on: https://go-review.googlesource.com/3840
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-04 21:06:37 +00:00
Robert Griesemer 01ba4c000c math/big: implement precise Float to decimal conversion (core functionality) 
Change-Id: Ic0153397922ded28a5cb362e86ecdfec42e92163
Reviewed-on: https://go-review.googlesource.com/3752
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-03 19:04:26 +00:00
Robert Griesemer 6966e07ae7 math/big: fix typos 
Change-Id: Icb1490f97584d61823339ae809b88d423b185e64
Reviewed-on: https://go-review.googlesource.com/3751
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-03 18:48:38 +00:00
Robert Griesemer 4c91c0d07b math/big: build Float.Format on top of Float.Append 
Change-Id: I444eec24467f827caa5c88a1c5ae5bce92508b98
Reviewed-on: https://go-review.googlesource.com/3750
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-02-03 18:43:51 +00:00
Robert Griesemer f17cd88089 math/big: split float conversion routines and tests into separate files 
No other functional changes.

Change-Id: I7e0bb7452c6a265535297ec7ce6a629f1aff695c
Reviewed-on: https://go-review.googlesource.com/3674
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-01-30 23:03:06 +00:00
Robert Griesemer 20a96a1f68 math/big: split rat conversion routines and tests into separate files 
No other functional changes.

Change-Id: I8be1fc488caa4f3d4c00afcb8c00475bfcd10709
Reviewed-on: https://go-review.googlesource.com/3673
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-01-30 23:02:51 +00:00
Robert Griesemer a0c5d28403 math/big: split int conversion routines and tests into separate files 
No other functional changes.

Change-Id: If0d9e6208d53478e70d991b6926ea196b2cccf2e
Reviewed-on: https://go-review.googlesource.com/3672
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-01-30 23:02:35 +00:00
Robert Griesemer d135966ef6 math/big: split nat conversion routines and tests into separate files 
No functional changes.

Change-Id: Ibbb705b167603d30467f3ebb83a3bb39845306a5
Reviewed-on: https://go-review.googlesource.com/3671
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-01-30 23:01:56 +00:00
Robert Griesemer 9f22de7aaf math/big: parsing of fractions and floats in mantissa bases other than 10 
Change-Id: I1eaebf956a69e0958201cc5e0a9beefa062c71e1
Reviewed-on: https://go-review.googlesource.com/3454
Reviewed-by: Alan Donovan <adonovan@google.com>
 2015-01-30 21:51:18 +00:00