Auto-generated commit

Author: stdlib-bot

.github/.keepalive

@@ -0,0 +1 @@
+2025-06-02T00:58:22.407Z

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 <section class="release" id="unreleased">
 
-## Unreleased (2025-04-26)
+## Unreleased (2025-06-02)
 
 <section class="features">
 
@@ -16,12 +16,25 @@
 
 <!-- /.features -->
 
+<section class="bug-fixes">
+
+### Bug Fixes
+
+-   [`95641f7`](https://github.com/stdlib-js/stdlib/commit/95641f75c1764479af76b23eac8a90101ee12f8d) - update implementation to preserve signed zeros
+-   [`da339ee`](https://github.com/stdlib-js/stdlib/commit/da339ee8d7e24972cbf4a1592b9174ef617978f8) - update implementation to preserve signed zeros
+
+</section>
+
+<!-- /.bug-fixes -->
+
 <section class="commits">
 
 ### Commits
 
 <details>
 
+-   [`95641f7`](https://github.com/stdlib-js/stdlib/commit/95641f75c1764479af76b23eac8a90101ee12f8d) - **fix:** update implementation to preserve signed zeros _(by Athan Reines)_
+-   [`da339ee`](https://github.com/stdlib-js/stdlib/commit/da339ee8d7e24972cbf4a1592b9174ef617978f8) - **fix:** update implementation to preserve signed zeros _(by Athan Reines)_
 -   [`9f85b5d`](https://github.com/stdlib-js/stdlib/commit/9f85b5d90cb6fcaf052116cd06aa4a693757f0ec) - **test:** fix description _(by Philipp Burckhardt)_
 -   [`074b9a1`](https://github.com/stdlib-js/stdlib/commit/074b9a191c77d297bab5cb51cf82a727a650fe58) - **feat:** add C `ndarray` API and refactor `blas/ext/base/dsumpw` [(#4329)](https://github.com/stdlib-js/stdlib/pull/4329) _(by Muhammad Haris)_
 -   [`62364f6`](https://github.com/stdlib-js/stdlib/commit/62364f62ea823a3b52c2ad25660ecd80c71f8f36) - **style:** fix C comment alignment _(by Philipp Burckhardt)_

CONTRIBUTORS

@@ -54,13 +54,15 @@ GK Bishnoi <[email protected]>
 GURU PRASAD SHARMA <[email protected]>
 Gaurav <[email protected]>
 Gautam sharma <[email protected]>
+Girish Garg <[email protected]>
 Golden Kumar <[email protected]>
 Gunj Joshi <[email protected]>
 Gururaj Gurram <[email protected]>
 Haroon Rasheed <[email protected]>
-Harsh <[email protected].com>
+Harsh <harshyadav6078@gmail.com>
 HarshaNP <[email protected]>
 Harshita Kalani <[email protected]>
+Hemang Choudhary <[email protected]>
 Hemant M Mehta <[email protected]>
 Hridyanshu <[email protected]>
 Jaimin Godhani <[email protected]>
@@ -78,6 +80,7 @@ Joris Labie <[email protected]>
 Justin Dennison <[email protected]>
 Justyn Shelby <[email protected]>
 Karan Anand <[email protected]>
+Karan Vasudevamurthy <[email protected]>
 Karan Yadav <[email protected]>
 Karthik Prakash <[email protected]>
 Kaushikgtm <[email protected]>
@@ -86,6 +89,7 @@ Kohantika Nath <[email protected]>
 Krishnam Agarwal <[email protected]>
 Krishnendu Das <[email protected]>
 Kshitij-Dale <[email protected]>
+Lalit Narayan Yadav <[email protected]>
 Lovelin Dhoni J B <[email protected]>
 MANI <[email protected]>
 Mahfuza Humayra Mohona <[email protected]>
@@ -143,6 +147,7 @@ Ryan Seal <[email protected]>
 Rylan Yang <[email protected]>
 SAHIL KUMAR <[email protected]>
 SHIVAM YADAV <[email protected]>
+Sachin Raj <[email protected]>
 Sahil Goyal <[email protected]>
 Sai Avinash <[email protected]>
 Sai Srikar Dumpeti <[email protected]>
@@ -163,14 +168,19 @@ Spandan Barve <[email protected]>
 Stephannie Jiménez Gacha <[email protected]>
 Suhaib Ilahi <[email protected]>
 Suraj Kumar <[email protected]>
+Swapnil Hajare <[email protected]>
 Tanishq Ahuja <[email protected]>
 Tirtadwipa Manunggal <[email protected]>
 Tudor Pagu <[email protected]>
 Tufailahmed Bargir <[email protected]>
+Tushar Bhardwaj <[email protected]>
+Uday Kakade <[email protected]>
+Ujjwal Kirti <[email protected]>
 Utkarsh <http://[email protected]>
 Utkarsh Raj <[email protected]>
 UtkershBasnet <[email protected]>
 Vaibhav Patel <[email protected]>
+Vara Rahul Rajana <[email protected]>
 Varad Gupta <[email protected]>
 Vinit Pandit <[email protected]>
 Vivek Maurya <[email protected]>
@@ -190,3 +200,4 @@ pranav-1720 <[email protected]>
 rahulrangers <[email protected]>
 rainn <[email protected]>
 rei2hu <[email protected]>
+zhanggy <[email protected]>

dist/index.js

@@ -31,7 +31,7 @@ extern "C" {
 /**
 * Computes the sum of double-precision floating-point strided array elements using pairwise summation.
 */
-double API_SUFFIX(stdlib_strided_dsumpw)( const CBLAS_INT N, const double *X, const CBLAS_INT stride );
+double API_SUFFIX(stdlib_strided_dsumpw)( const CBLAS_INT N, const double *X, const CBLAS_INT strideX );
 
 /**
 * Computes the sum of double-precision floating-point strided array elements using pairwise summation and alternative indexing semantics.

dist/index.js.map

@@ -80,8 +80,9 @@ function dsumpw( N, x, strideX, offsetX ) {
 	}
 	if ( N < 8 ) {
 		// Use simple summation...
-		s = 0.0;
-		for ( i = 0; i < N; i++ ) {
+		s = x[ ix ];
+		ix += strideX;
+		for ( i = 1; i < N; i++ ) {
 			s += x[ ix ];
 			ix += strideX;
 		}
@@ -115,7 +116,7 @@ function dsumpw( N, x, strideX, offsetX ) {
 		s = ( (s0+s1) + (s2+s3) ) + ( (s4+s5) + (s6+s7) );
 
 		// Clean-up loop...
-		for ( i; i < N; i++ ) {
+		for ( ; i < N; i++ ) {
 			s += x[ ix ];
 			ix += strideX;
 		}

include/stdlib/blas/ext/base/dsumpw.h

@@ -58,6 +58,7 @@
     "@stdlib/array-float64": "^0.2.2",
     "@stdlib/assert-is-browser": "^0.2.2",
     "@stdlib/math-base-assert-is-nan": "^0.2.2",
+    "@stdlib/math-base-assert-is-negative-zero": "^0.2.2",
     "@stdlib/math-base-special-pow": "^0.3.0",
     "@stdlib/random-array-discrete-uniform": "^0.2.1",
     "@stdlib/random-array-uniform": "^0.2.1",

lib/ndarray.js

@@ -82,8 +82,9 @@ double API_SUFFIX(stdlib_strided_dsumpw_ndarray)( const CBLAS_INT N, const doubl
 	}
 	if ( N < 8 ) {
 		// Use simple summation...
-		sum = 0.0;
-		for ( i = 0; i < N; i++ ) {
+		sum = X[ ix ];
+		ix += strideX;
+		for ( i = 1; i < N; i++ ) {
 			sum += X[ ix ];
 			ix += strideX;
 		}
@@ -118,7 +119,7 @@ double API_SUFFIX(stdlib_strided_dsumpw_ndarray)( const CBLAS_INT N, const doubl
 		sum = ( (s0+s1) + (s2+s3) ) + ( (s4+s5) + (s6+s7) );
 
 		// Clean-up loop...
-		for (; i < N; i++ ) {
+		for ( ; i < N; i++ ) {
 			sum += X[ ix ];
 			ix += strideX;
 		}

package.json

@@ -22,6 +22,7 @@
 
 var tape = require( 'tape' );
 var isnan = require( '@stdlib/math-base-assert-is-nan' );
+var isNegativeZero = require( '@stdlib/math-base-assert-is-negative-zero' );
 var Float64Array = require( '@stdlib/array-float64' );
 var dsumpw = require( './../lib/ndarray.js' );
 
@@ -74,6 +75,17 @@ tape( 'the function calculates the sum of all strided array elements', function
 	t.end();
 });
 
+tape( 'the function preserves the sign of zero', function test( t ) {
+	var x;
+	var v;
+
+	x = new Float64Array( [ -0.0, -0.0, -0.0, -0.0, -0.0 ] );
+	v = dsumpw( x.length, x, 1, 0 );
+	t.strictEqual( isNegativeZero( v ), true, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'if provided an `N` parameter less than or equal to `0`, the function returns `0.0`', function test( t ) {
 	var x;
 	var v;