| Age | Commit message (Collapse) | Author |
|---|
|
Change-Id: I4a6c2ef6fd21355952ab7d8eaad883646a95d364
Reviewed-on: https://go-review.googlesource.com/c/go/+/535087
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
|
|
Fix comments, including duplicate is, wrong phrases and articles, misspellings, etc.
Change-Id: I8bfea53b9b275e649757cc4bee6a8a026ed9c7a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/493035
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: shuang cui <imcusg@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
|
|
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]
Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.
For #51082.
Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
|
|
go/doc in all its forms applies this replacement when rendering
the comments. We are considering formatting doc comments,
including doing this replacement as part of the formatting.
Apply it to our source files ahead of time.
For #51082.
Change-Id: Ifcc1f5861abb57c5d14e7d8c2102dfb31b7a3a19
Reviewed-on: https://go-review.googlesource.com/c/go/+/384262
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
|
|
A future change to gofmt will rewrite
// Doc comment.
//
func f()
to
// Doc comment.
func f()
Apply that change preemptively to all doc comments.
For #51082.
Change-Id: I4023e16cfb0729b64a8590f071cd92f17343081d
Reviewed-on: https://go-review.googlesource.com/c/go/+/384259
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
|
|
Removes 162 KiB from binaries that don't use math/big.Float:
-rwxr-xr-x 1 bradfitz bradfitz 1916590 Apr 14 12:21 x.after
-rwxr-xr-x 1 bradfitz bradfitz 2082575 Apr 14 12:21 x.before
No change in deps (this package already used sync).
No change in benchmarks:
name old time/op new time/op delta
FloatSqrt/64-8 1.06µs ±10% 1.03µs ± 6% ~ (p=0.133 n=10+9)
FloatSqrt/128-8 2.26µs ± 9% 2.28µs ± 9% ~ (p=0.460 n=10+8)
FloatSqrt/256-8 2.29µs ± 5% 2.31µs ± 3% ~ (p=0.214 n=9+9)
FloatSqrt/1000-8 5.82µs ± 3% 5.87µs ± 7% ~ (p=0.666 n=9+9)
FloatSqrt/10000-8 56.4µs ± 5% 57.0µs ± 6% ~ (p=0.436 n=10+10)
FloatSqrt/100000-8 1.34ms ± 8% 1.31ms ± 3% ~ (p=0.447 n=10+9)
FloatSqrt/1000000-8 106ms ± 5% 107ms ± 7% ~ (p=0.315 n=10+10)
name old alloc/op new alloc/op delta
FloatSqrt/64-8 280B ± 0% 280B ± 0% ~ (all equal)
FloatSqrt/128-8 504B ± 0% 504B ± 0% ~ (all equal)
FloatSqrt/256-8 344B ± 0% 344B ± 0% ~ (all equal)
FloatSqrt/1000-8 1.30kB ± 0% 1.30kB ± 0% ~ (all equal)
FloatSqrt/10000-8 13.5kB ± 0% 13.5kB ± 0% ~ (p=0.403 n=10+10)
FloatSqrt/100000-8 123kB ± 0% 123kB ± 0% ~ (p=0.393 n=10+10)
FloatSqrt/1000000-8 1.84MB ± 7% 1.84MB ± 5% ~ (p=0.739 n=10+10)
name old allocs/op new allocs/op delta
FloatSqrt/64-8 8.00 ± 0% 8.00 ± 0% ~ (all equal)
FloatSqrt/128-8 11.0 ± 0% 11.0 ± 0% ~ (all equal)
FloatSqrt/256-8 5.00 ± 0% 5.00 ± 0% ~ (all equal)
FloatSqrt/1000-8 6.00 ± 0% 6.00 ± 0% ~ (all equal)
FloatSqrt/10000-8 6.00 ± 0% 6.00 ± 0% ~ (all equal)
FloatSqrt/100000-8 6.00 ± 0% 6.00 ± 0% ~ (all equal)
FloatSqrt/1000000-8 10.9 ±10% 10.8 ±17% ~ (p=0.974 n=10+10)
Change-Id: I3337f1f531bf7b4fae192b9d90cd24ff2be14fea
Reviewed-on: https://go-review.googlesource.com/c/go/+/228108
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
|
|
This fixes an old oversight. Rat.SetString already permitted
fractions a/b where both a and b could independently specify
a base prefix. With this CL, it now also accepts non-decimal
floating-point numbers.
Fixes #29799.
Change-Id: I9cc65666a5cebb00f0202da2e4fc5654a02e3234
Reviewed-on: https://go-review.googlesource.com/c/go/+/168237
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
|
|
The primary change is in nat.scan which now accepts underscores for base 0.
While at it, streamlined error handling in that function as well.
Also, improved the corresponding test significantly by checking the
expected result values also in case of scan errors.
The second major change is in scanExponent which now accepts underscores when
the new sepOk argument is set. While at it, essentially rewrote that
function to match error and underscore handling of nat.scan more closely.
Added a new test for scanExponent which until now was only tested
indirectly.
Finally, updated the documentation for several functions and added many
new test cases to clients of nat.scan.
A major portion of this CL is due to much better test coverage.
Updates #28493.
Change-Id: I7f17b361b633fbe6c798619d891bd5e0a045b5c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/166157
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
|
|
This CL extends the various SetString and Parse methods for
Ints, Rats, and Floats to accept the new octal prefixes.
The main change is in natconv.go, all other changes are
documentation and test updates.
Finally, this CL also fixes TestRatSetString which silently
dropped certain failures.
Updates #12711.
Change-Id: I5ee5879e25013ba1e6eda93ff280915f25ab5d55
Reviewed-on: https://go-review.googlesource.com/c/go/+/165898
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
|
|
The current implementation accepted binary exponents but restricted
them to 'p'. This change permits both 'p' and 'P'.
R=Go1.13
Updates #29008.
Change-Id: I7a89ccb86af4438f17b0422be7cb630ffcf43272
Reviewed-on: https://go-review.googlesource.com/c/159297
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
|
|
Leading spaces in a couple of lines instead of tabs cause those to be
misaligned (as seen on <https://golang.org/pkg/math/big/#Float.Parse>):
<<<
number = [ sign ] [ prefix ] mantissa [ exponent ] | infinity .
sign = "+" | "-" .
prefix = "0" ( "x" | "X" | "b" | "B" ) .
mantissa = digits | digits "." [ digits ] | "." digits .
exponent = ( "E" | "e" | "p" ) [ sign ] digits .
digits = digit { digit } .
digit = "0" ... "9" | "a" ... "z" | "A" ... "Z" .
infinity = [ sign ] ( "inf" | "Inf" ) .
>>>
Replace the leading spaces with tabs so that those align well.
Change-Id: Ibba6cd53f340001bbd929067dc587feb071dc3bd
Reviewed-on: https://go-review.googlesource.com/31830
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
|
|
Implements Float.Scan which satisfies fmt.Scanner interface.
Also enforces docs' interface implementation claims with compile time
type assertions, that is:
+ Float always implements fmt.Formatter and fmt.Scanner
+ Int always implements fmt.Formatter and fmt.Scanner
+ Rat always implements fmt.Formatter
which will ensure that the API claims are strictly matched.
Also note that Float.Scan doesn't handle ±Inf.
Fixes #17391
Change-Id: I3d3dfbe7f602066975c7a7794fe25b4c645440ce
Reviewed-on: https://go-review.googlesource.com/30723
Reviewed-by: Robert Griesemer <gri@golang.org>
|
|
Also, document behavior explicitly for all SetString implementations.
Fixes #17001.
Change-Id: Iccc882b4bc7f8b61b6092f330e405c146a80dc98
Reviewed-on: https://go-review.googlesource.com/30472
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
|
|
Change-Id: Icd06d99c42b8299fd931c7da821e1f418684d913
Reviewed-on: https://go-review.googlesource.com/19829
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
|
|
Instead of computing the final adjustment factor as a power of 10,
it's more efficient to split 10**e into 2**e * 5**e . Powers of 2
are trivially added to the Float exponent, and powers of 5 are
smaller and thus faster to compute.
Also, use a table of uint64 values rather than float64 values for
initial power value. uint64 values appear to be faster to convert
to Floats (useful for small exponents).
Added two small benchmarks to confirm that there's no regresssion.
benchmark old ns/op new ns/op delta
BenchmarkParseFloatSmallExp-8 17543 16220 -7.54%
BenchmarkParseFloatLargeExp-8 60865 59996 -1.43%
Change-Id: I3efd7556b023316f86f334137a67fe0c6d52f8ef
Reviewed-on: https://go-review.googlesource.com/14782
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Even though the umul/uquo functions expect two valid, finite big.Floats
arguments, SetString was calling them with possibly Inf values, which
resulted in bogus return values.
Replace umul and udiv calls with Mul and Quo calls to fix this. Also,
fix two wrong tests.
See relevant issue on issue tracker for a detailed explanation.
Fixes #11341
Change-Id: Ie35222763a57a2d712a5f5f7baec75cab8189a53
Reviewed-on: https://go-review.googlesource.com/13778
Reviewed-by: Robert Griesemer <gri@golang.org>
|
|
- (*Float).Scan conflicted with fmt.Scanner.Scan; it was also only used
internally. Removed it, as well as the companion ScanFloat function.
- (*Float).Parse (and thus ParseFloat) can now also parse infinities.
As a result, more code could be simplified.
- Fixed a bug in rounding (round may implicitly be called for infinite
values). Found via existing test cases, after simplifying some code.
- Added more test cases.
Fixes issue #10938.
Change-Id: I1df97821654f034965ba8b82b272e52e6dc427f1
Reviewed-on: https://go-review.googlesource.com/10498
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
- factor out handling of sign
- rename bstring, pstring to fmtB, fmtP consistent with fmtE, fmtF
- move all float-to-string conversion functions into ftoa.go
- no functional changes
Change-Id: I5970ecb874dc9c387630b59147d90bda16a5d8e6
Reviewed-on: https://go-review.googlesource.com/10387
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Float.Format supports the 'b' and 'p' format, both of which print
a binary ('p') exponent. The 'b' format always printed a sign ('+'
or '-') for the exponent; the 'p' format only printed a negative
sign for the exponent. This change makes the two consistent. It
also makes the 'p' format easier to read if the exponent is >= 0.
Also:
- Comments added elsewhere.
Change-Id: Ifd2e01bdafb3043345972ca22a90248d055bd29b
Reviewed-on: https://go-review.googlesource.com/10359
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: Ic2d9fdae43d18255c198ae62376212bdc89b75da
Reviewed-on: https://go-review.googlesource.com/8464
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
NaNs make the API more complicated for no real good reasons.
There are few operations that produce NaNs with IEEE arithmetic,
there's no need to copy the behavior. It's easy to test for these
scenarios and avoid them (on the other hand, it's not easy to test
for overflow or underflow, so we want to keep +/-Inf).
Also:
- renamed IsNeg -> Signbit (clearer, especially for x == -0)
- removed IsZero (Sign() == 0 is sufficient and efficient)
- removed IsFinite (now same as !IsInf)
Change-Id: I3f3b4445c325d9bbb1bf46ce2e298a6aeb498e07
Reviewed-on: https://go-review.googlesource.com/8280
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: I72e8389ec080be8a0119f98df898de6f5510fa4d
Reviewed-on: https://go-review.googlesource.com/7693
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Fixed several corner-case bugs and added corresponding tests.
Change-Id: I23096b9caeeff0956f65ab59fa91e168d0e47bb8
Reviewed-on: https://go-review.googlesource.com/7001
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
This is a fairly significant _internal_ representation change. Instead
of encoding 0, finite, infinite, and NaN values with special mantissa
and exponent values, a new (1 byte) 'form' field is used (without making
the Float struct bigger). The form field permits simpler and faster
case distinctions. As a side benefit, for zero and non-finite floats,
fewer fields need to be set. Also, the exponent range is not the full
int32 range (in the old format, infExp and nanExp were used to represent
Inf and NaN values and tests for those values sometimes didn't test
for the empty mantissa, so the range was reduced by 2 values).
The correspondence between the old and new fields is as follows.
Old representation:
x neg mant exp
---------------------------------------------------------------
+/-0 sign empty 0
0 < |x| < +Inf sign mantissa exponent
+/-Inf sign empty infExp
NaN false empty nanExp
New representation (- stands for ignored fields):
x neg mant exp form
---------------------------------------------------------------
+/-0 sign - - zero
0 < |x| < +Inf sign mantissa exponent finite
+/-Inf sign - - inf
NaN - - - nan
Client should not be affected by this change.
Change-Id: I7e355894d602ceb23f9ec01da755fe6e0386b101
Reviewed-on: https://go-review.googlesource.com/6870
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: Ide0615542d67b7d81bf6c56aab550e142a8789f7
Reviewed-on: https://go-review.googlesource.com/6682
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
This change introduces NaNs (for situations like Inf-Inf, etc.).
The implementation is incomplete (the four basic operations produce
a NaN if any of the operands is an Inf or a NaN); and some operations
produce incorrect accuracy for NaN arguments. These are known bugs
which are documented.
Change-Id: Ia88841209e47930681cef19f113e178f92ceeb33
Reviewed-on: https://go-review.googlesource.com/6540
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: I9b78085adc12cbd240d0b8b48db6810ddb2aeadd
Reviewed-on: https://go-review.googlesource.com/5991
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: I7bf7154e2d8d779fdf7f1d2bb561a06ad174f3b0
Reviewed-on: https://go-review.googlesource.com/4883
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Fixes #9939.
Change-Id: I9d60722b648fbc00650115da539a7466c6c86552
Reviewed-on: https://go-review.googlesource.com/5640
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Fixes $9938.
Change-Id: Ie8680a875225748abd660fb26b4c25546e7b92d3
Reviewed-on: https://go-review.googlesource.com/5620
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
TBR adonovan
Change-Id: I842cbc855dbd560f65e76c9a557dff1a22c5d610
Reviewed-on: https://go-review.googlesource.com/4882
Reviewed-by: Robert Griesemer <gri@golang.org>
|
|
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>
|
|
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>
|
|
- 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>
|
|
- 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>
|
|
Change-Id: I10efa3bc8bc7f41100feabe17837f805a42d7eb6
Reviewed-on: https://go-review.googlesource.com/3842
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
(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>
|
|
Change-Id: Icb1490f97584d61823339ae809b88d423b185e64
Reviewed-on: https://go-review.googlesource.com/3751
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
Change-Id: I444eec24467f827caa5c88a1c5ae5bce92508b98
Reviewed-on: https://go-review.googlesource.com/3750
Reviewed-by: Alan Donovan <adonovan@google.com>
|
|
No other functional changes.
Change-Id: I7e0bb7452c6a265535297ec7ce6a629f1aff695c
Reviewed-on: https://go-review.googlesource.com/3674
Reviewed-by: Alan Donovan <adonovan@google.com>
|
