feat: add `math/base/special/exp2f` by aayush0325 · Pull Request #3366 · stdlib-js/stdlib

aayush0325 · 2024-12-07T17:40:05Z

Progresses #649

Description

What is the purpose of this pull request?

This pull request:

adds math/base/special/exp2f

Related Issues

Does this pull request have any related issues?

This pull request:

progresses [RFC]: Add C implementations to base special math functions (tracking issue) #649

Questions

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What should i do about benchmark/c/cephes ? that doesn't seem to compile locally and on the CI tests as well.

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No.

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Please ensure the following tasks are completed before submitting this pull request.

Read, understood, and followed the contributing guidelines.

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aayush0325 · 2024-12-07T17:40:32Z

/stdlib update-copyright-years

stdlib-bot · 2024-12-07T17:42:17Z

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/exp2f	$\\color{green}330/330$ $\\color{green}+0.00\\%$	$\\color{green}17/17$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}330/330$ $\\color{green}+0.00\\%$

The above coverage report was generated for the changes in this PR.

Planeshifter

Thanks for your work on this PR! Looks great overall, but some changes will be needed for the JavaScript implementation.

In main.js, we need to use the helper function

var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );

in order to ensure that all operations are done in a manner consistent with single-precision arithmetic. Recall that in JavaScript, all numbers are double-precision by default, so to emulate single-precision we must, in addition to using the single-precision variants of math functions, explicitly cast intermediate results and constants to single-precision floats.

aayush0325 · 2024-12-15T03:44:40Z

good morning @Planeshifter! I've wrapped the intermediate results and final answers in float64ToFloat32(). If there's anything else that needs to be changed here please let me know.

aayush0325 · 2024-12-15T03:53:09Z

Also, as mentioned in the questions section of the PR, what should i do about benchmark/c/cephes since it doesn't seem to compile locally and it fails on CI as well. Is there something that I'm missing from my side? (see this commit)

gunjjoshi · 2025-03-19T17:30:29Z

/stdlib update-copyright-years

aayush0325 · 2025-04-03T01:07:28Z

good morning @gunjjoshi! sorry for the delay, I've linked to all the references for your ease, kindly let me know if i have to make any other changes

kgryte · 2025-08-12T07:43:13Z

@anandkaranubc Would you mind taking over this PR?

anandkaranubc · 2025-08-26T07:50:45Z

/stdlib merge

anandkaranubc · 2025-08-26T07:57:12Z

+
+'use strict';
+
+// TODO: replace with TOMS (Openlibm) algo (updating license header and long comment)


@kgryte Does this comment (originally present in exp2) mean following https://github.com/freebsd/freebsd-src/blob/main/lib/msun/src/s_exp2f.c implementation instead?

Yes, I believe so. The original implementation looks to be based on Cephes, and, generally, we have preferred to use libm over Cephes given that libm is more actively maintained.

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anandkaranubc · 2026-08-10T07:29:19Z

/stdlib help

stdlib-bot · 2026-08-10T07:29:41Z

@anandkaranubc, available slash commands include:

/stdlib check-files - Check for required files.
/stdlib make-commands - Print make commands for package changed in PR.
/stdlib update-copyright-years - Update copyright header years.
/stdlib lint-autofix - Auto-fix lint errors.
/stdlib merge - Merge changes from develop branch into this PR.
/stdlib rebase - Rebase this PR on top of develop branch.
/stdlib todo - Create a new todo issue.

anandkaranubc · 2026-08-10T07:29:56Z

/stdlib update-copyright-years

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aayush0325 added 7 commits December 7, 2024 21:37

feat: basic stuff added

44e4005

feat: auto generated functions

8d8d4dd

feat: matching tolerance for tests

6c5e9ed

feat: some changes

c2b6ebe

feat: examples added

db2186b

feat: docs added

d7484a5

feat: benchmarks added

2412525

stdlib-bot added Math Issue or pull request specific to math functionality. Needs Review A pull request which needs code review. labels Dec 7, 2024

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Dec 7, 2024

chore: update copyright years

8adc586

stdlib-bot removed the bot: In Progress Pull request is currently awaiting automation. label Dec 7, 2024

aayush0325 added 3 commits December 7, 2024 23:13

fix: removed bugs

b73a361

chore: removing cephes benchmarks for now

1ab71c0

chore: spacing error

3092b05

Planeshifter requested changes Dec 15, 2024

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Planeshifter added Needs Changes Pull request which needs changes before being merged. and removed Needs Review A pull request which needs code review. labels Dec 15, 2024

feat: explicitly convert values to float32

17bf069

aayush0325 requested a review from Planeshifter December 16, 2024 15:19

stdlib-bot added the Needs Review A pull request which needs code review. label Dec 16, 2024

kgryte requested a review from gunjjoshi March 14, 2025 09:45

kgryte removed the Needs Changes Pull request which needs changes before being merged. label Mar 14, 2025

Planeshifter added the Potential Duplicate There might be another pull request resolving the same issue. label Mar 15, 2025

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Mar 19, 2025

aayush0325 requested a review from gunjjoshi April 3, 2025 01:07

stdlib-bot added the Needs Review A pull request which needs code review. label Apr 3, 2025

kgryte requested a review from anandkaranubc May 31, 2025 23:58

kgryte removed the Needs Changes Pull request which needs changes before being merged. label May 31, 2025

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Aug 26, 2025

Merge remote-tracking branch 'upstream/develop' into exp2f

2578810

stdlib-bot removed the bot: In Progress Pull request is currently awaiting automation. label Aug 26, 2025

anandkaranubc reviewed Aug 26, 2025

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navyansh007 mentioned this pull request Mar 29, 2026

[RFC]: develop C and Javascript implementation for base special mathematical functions stdlib-js/google-summer-of-code#219

Closed

7 tasks

Merge branch 'develop' into exp2f

142ca18

anandkaranubc requested a review from a team August 10, 2026 06:05

anandkaranubc mentioned this pull request Aug 10, 2026

Clean-up math/base/special/exp2f stdlib-js/metr-issue-tracker#1138

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anandkaranubc and others added 2 commits August 10, 2026 00:26

Merge branch 'develop' into exp2f

b6766ac

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Aug 10, 2026

stdlib-bot removed the bot: In Progress Pull request is currently awaiting automation. label Aug 10, 2026

anandkaranubc added JavaScript Issue involves or relates to JavaScript. C Issue involves or relates to C. METR Pull request associated with the METR project. labels Aug 10, 2026

stdlib-bot added the bot: In Progress Pull request is currently awaiting automation. label Aug 10, 2026

anandkaranubc added the Needs Changes Pull request which needs changes before being merged. label Aug 10, 2026

chore: update copyright years

a778697

stdlib-bot removed the bot: In Progress Pull request is currently awaiting automation. label Aug 10, 2026


		'use strict';

		// TODO: replace with TOMS (Openlibm) algo (updating license header and long comment)

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