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1ff59f3dd3
Both Eisel-Lemire and Ryu depend on a table of truncated 128-bit mantissas of powers of 10, and so will Dragonbox. This CL: - Moves the table to a separate file, so it doesn't look tied to Eisel-Lemire. - Introduces a uint128 type in math.go for the table values, since .Hi and .Lo are clearer than [1] and [0]. - Generates the table from a standalone generator pow10gen.go. - Adds a new pow10 function in math.go to handle table access details. - Factors a 64x128->192-bit multiply into umul192 in math.go. - Moves multiplication by log₁₀ 2 and log₂ 10 into math.go. - Introduces an import_test.go to avoid having to type differently cased names in test code versus regular code. - Introduces named constants for the floating-point size parameters. Previously these were only in the floatInfo global variables. - Changes the BenchmarkAppendUintVarlen subtest names to be more useful. Change-Id: I9826ee5f41c5c19be3b6a7c3c5f277ec6c23b39a Reviewed-on: https://go-review.googlesource.com/c/go/+/712661 Reviewed-by: Alan Donovan <adonovan@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: David Chase <drchase@google.com>
20 lines
478 B
Go
20 lines
478 B
Go
// Copyright 2025 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package strconv_test
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import . "strconv"
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type uint128 = Uint128
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var (
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baseError = BaseError
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bitSizeError = BitSizeError
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mulLog10_2 = MulLog10_2
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mulLog2_10 = MulLog2_10
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parseFloatPrefix = ParseFloatPrefix
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pow10 = Pow10
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umul128 = Umul128
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umul192 = Umul192
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)
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