diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/README.md b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/README.md
index 9f2e79d83560..5afec4d99f15 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/README.md
@@ -20,7 +20,7 @@ limitations under the License.
 
 # dapxsumpw
 
-> Add a constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.
+> Add a scalar constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.
 
 <section class="intro">
 
@@ -36,9 +36,9 @@ limitations under the License.
 var dapxsumpw = require( '@stdlib/blas/ext/base/dapxsumpw' );
 ```
 
-#### dapxsumpw( N, alpha, x, stride )
+#### dapxsumpw( N, alpha, x, strideX )
 
-Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 
 ```javascript
 var Float64Array = require( '@stdlib/array/float64' );
@@ -54,7 +54,7 @@ The function has the following parameters:
 
 -   **N**: number of indexed elements.
 -   **x**: input [`Float64Array`][@stdlib/array/float64].
--   **stride**: index increment for `x`.
+-   **strideX**: index increment for `x`.
 
 The `N` and stride parameters determine which elements in the strided array are accessed at runtime. For example, to access every other element in `x`,
 
@@ -81,9 +81,9 @@ var v = dapxsumpw( 4, 5.0, x1, 2 );
 // returns 25.0
 ```
 
-#### dapxsumpw.ndarray( N, alpha, x, stride, offset )
+#### dapxsumpw.ndarray( N, alpha, x, strideX, offsetX )
 
-Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
+Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
 
 ```javascript
 var Float64Array = require( '@stdlib/array/float64' );
@@ -97,9 +97,9 @@ var v = dapxsumpw.ndarray( N, 5.0, x, 1, 0 );
 
 The function has the following additional parameters:
 
--   **offset**: starting index for `x`.
+-   **offsetX**: starting index for `x`.
 
-While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the `offset` parameter supports indexing semantics based on a starting index. For example, to access every other value in `x` starting from the second value
+While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to access every other value in `x` starting from the second value
 
 ```javascript
 var Float64Array = require( '@stdlib/array/float64' );
@@ -131,11 +131,12 @@ var v = dapxsumpw.ndarray( 4, 5.0, x, 2, 1 );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var dapxsumpw = require( '@stdlib/blas/ext/base/dapxsumpw' );
 
-var x = filledarrayBy( 10, 'float64', discreteUniform( 0, 100 ) );
+var x = discreteUniform( 10, -100, 100, {
+    'dtype': 'float64'
+});
 console.log( x );
 
 var v = dapxsumpw( x.length, 5.0, x, 1 );
@@ -146,8 +147,125 @@ console.log( v );
 
 <!-- /.examples -->
 
+<!-- C interface documentation. -->
+
 * * *
 
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/blas/ext/base/dapxsumpw.h"
+```
+
+#### stdlib_strided_dapxsumpw( N, alpha, \*X, strideX )
+
+Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+
+```c
+const double x[] = { 1.0, 2.0, 3.0, 4.0 };
+
+double v = stdlib_strided_dapxsumpw( 4, 5.0, x, 1 );
+// returns 30.0
+```
+
+The function accepts the following arguments:
+
+-   **N**: `[in] CBLAS_INT` number of indexed elements.
+-   **alpha**: `[in] double` scalar constant.
+-   **X**: `[in] double*` input array.
+-   **strideX**: `[in] CBLAS_INT` index increment for `X`.
+
+```c
+double stdlib_strided_dapxsumpw( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX );
+```
+
+#### stdlib_strided_dapxsumpw_ndarray( N, alpha, \*X, strideX, offsetX )
+
+Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
+
+```c
+const double x[] = { 1.0, 2.0, 3.0, 4.0 };
+
+double v = stdlib_strided_dapxsumpw_ndarray( 4, 5.0, x, 1, 0 );
+// returns 30.0
+```
+
+The function accepts the following arguments:
+
+-   **N**: `[in] CBLAS_INT` number of indexed elements.
+-   **alpha**: `[in] double` scalar constant.
+-   **X**: `[in] double*` input array.
+-   **strideX**: `[in] CBLAS_INT` index increment for `X`.
+-   **offsetX**: `[in] CBLAS_INT` starting index for `X`.
+
+```c
+double stdlib_strided_dapxsumpw_ndarray( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX, const CBLAS_INT offsetX );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/blas/ext/base/dapxsumpw.h"
+#include <stdio.h>
+
+int main( void ) {
+    // Create a strided array:
+    const double x[] = { 1.0, -2.0, 3.0, -4.0, 5.0, -6.0, 7.0, -8.0 };
+
+    // Specify the number of indexed elements:
+    const int N = 8;
+
+    // Specify a stride:
+    const int strideX = 1;
+
+    // Compute the sum:
+    double v = stdlib_strided_dapxsumpw( N, 5.0, x, strideX );
+
+    // Print the result:
+    printf( "Sum: %lf\n", sum );
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
 <section class="references">
 
 ## References
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.js
index b32f6b5208f4..e36e05b268a4 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.js
@@ -21,8 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var pkg = require( './../package.json' ).name;
@@ -31,7 +30,9 @@ var dapxsumpw = require( './../lib/dapxsumpw.js' );
 
 // VARIABLES //
 
-var rand = uniform( -100.0, 100.0 );
+var options = {
+	'dtype': 'float64'
+};
 
 
 // FUNCTIONS //
@@ -44,7 +45,7 @@ var rand = uniform( -100.0, 100.0 );
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = filledarrayBy( len, 'float64', rand );
+	var x = uniform( len, -100, 100, options );
 	return benchmark;
 
 	function benchmark( b ) {
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.native.js
index 58ac37fe341e..c70e75826a5f 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.native.js
@@ -22,8 +22,7 @@
 
 var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var tryRequire = require( '@stdlib/utils/try-require' );
@@ -36,7 +35,9 @@ var dapxsumpw = tryRequire( resolve( __dirname, './../lib/dapxsumpw.native.js' )
 var opts = {
 	'skip': ( dapxsumpw instanceof Error )
 };
-var rand = uniform( -100.0, 100.0 );
+var options = {
+	'dtype': 'float64'
+};
 
 
 // FUNCTIONS //
@@ -49,7 +50,7 @@ var rand = uniform( -100.0, 100.0 );
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = filledarrayBy( len, 'float64', rand );
+	var x = uniform( len, -100, 100, options );
 	return benchmark;
 
 	function benchmark( b ) {
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.js
index 26520d6cff1d..8e9daff28840 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.js
@@ -21,8 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var pkg = require( './../package.json' ).name;
@@ -31,7 +30,9 @@ var dapxsumpw = require( './../lib/ndarray.js' );
 
 // VARIABLES //
 
-var rand = uniform( -100.0, 100.0 );
+var options = {
+	'dtype': 'float64'
+};
 
 
 // FUNCTIONS //
@@ -44,7 +45,7 @@ var rand = uniform( -100.0, 100.0 );
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = filledarrayBy( len, 'float64', rand );
+	var x = uniform( len, -100, 100, options );
 	return benchmark;
 
 	function benchmark( b ) {
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.native.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.native.js
index 95b9cfc7756c..98bac91f954a 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/benchmark.ndarray.native.js
@@ -22,8 +22,7 @@
 
 var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var tryRequire = require( '@stdlib/utils/try-require' );
@@ -36,7 +35,9 @@ var dapxsumpw = tryRequire( resolve( __dirname, './../lib/ndarray.native.js' ) )
 var opts = {
 	'skip': ( dapxsumpw instanceof Error )
 };
-var rand = uniform( -100.0, 100.0 );
+var options = {
+	'dtype': 'float64'
+};
 
 
 // FUNCTIONS //
@@ -49,7 +50,7 @@ var rand = uniform( -100.0, 100.0 );
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = filledarrayBy( len, 'float64', rand );
+	var x = uniform( len, -100, 100, options );
 	return benchmark;
 
 	function benchmark( b ) {
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/c/benchmark.length.c b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/c/benchmark.length.c
index 7829a9e26071..93770cad183e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/c/benchmark.length.c
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/benchmark/c/benchmark.length.c
@@ -94,7 +94,7 @@ static double rand_double( void ) {
 * @param len          array length
 * @return elapsed time in seconds
 */
-static double benchmark( int iterations, int len ) {
+static double benchmark1( int iterations, int len ) {
 	double elapsed;
 	double x[ len ];
 	double v;
@@ -120,6 +120,39 @@ static double benchmark( int iterations, int len ) {
 	return elapsed;
 }
 
+/**
+* Runs a benchmark.
+*
+* @param iterations   number of iterations
+* @param len          array length
+* @return elapsed time in seconds
+*/
+static double benchmark2( int iterations, int len ) {
+	double elapsed;
+	double x[ len ];
+	double v;
+	double t;
+	int i;
+
+	for ( i = 0; i < len; i++ ) {
+		x[ i ] = ( rand_double() * 20000.0 ) - 10000.0;
+	}
+	v = 0.0;
+	t = tic();
+	for ( i = 0; i < iterations; i++ ) {
+		v = stdlib_strided_dapxsumpw_ndarray( len, 5.0, x, 1, 0 );
+		if ( v != v ) {
+			printf( "should not return NaN\n" );
+			break;
+		}
+	}
+	elapsed = tic() - t;
+	if ( v != v ) {
+		printf( "should not return NaN\n" );
+	}
+	return elapsed;
+}
+
 /**
 * Main execution sequence.
 */
@@ -142,7 +175,18 @@ int main( void ) {
 		for ( j = 0; j < REPEATS; j++ ) {
 			count += 1;
 			printf( "# c::%s:len=%d\n", NAME, len );
-			elapsed = benchmark( iter, len );
+			elapsed = benchmark1( iter, len );
+			print_results( iter, elapsed );
+			printf( "ok %d benchmark finished\n", count );
+		}
+	}
+		for ( i = MIN; i <= MAX; i++ ) {
+		len = pow( 10, i );
+		iter = ITERATIONS / pow( 10, i-1 );
+		for ( j = 0; j < REPEATS; j++ ) {
+			count += 1;
+			printf( "# c::%s:ndarray:len=%d\n", NAME, len );
+			elapsed = benchmark2( iter, len );
 			print_results( iter, elapsed );
 			printf( "ok %d benchmark finished\n", count );
 		}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/repl.txt
index 7859c941b887..34a5cc6a2af0 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/repl.txt
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/repl.txt
@@ -1,6 +1,6 @@
 
-{{alias}}( N, alpha, x, stride )
-    Adds a constant to each double-precision floating-point strided array
+{{alias}}( N, alpha, x, strideX )
+    Adds a scalar constant to each double-precision floating-point strided array
     element and computes the sum using pairwise summation.
 
     The `N` and stride parameters determine which elements in
@@ -22,7 +22,7 @@
     x: Float64Array
         Input array.
 
-    stride: integer
+    strideX: integer
         Index increment.
 
     Returns
@@ -49,13 +49,13 @@
     14.0
 
 
-{{alias}}.ndarray( N, alpha, x, stride, offset )
+{{alias}}.ndarray( N, alpha, x, strideX, offsetX )
     Adds a constant to each double-precision floating-point strided array
     element and computes the sum using pairwise summation and alternative
     indexing semantics.
 
     While typed array views mandate a view offset based on the underlying
-    buffer, the `offset` parameter supports indexing semantics based on a
+    buffer, the offset parameter supports indexing semantics based on a
     starting index.
 
     Parameters
@@ -69,10 +69,10 @@
     x: Float64Array
         Input array.
 
-    stride: integer
+    strideX: integer
         Index increment.
 
-    offset: integer
+    offsetX: integer
         Starting index.
 
     Returns
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/types/index.d.ts
index e6a0be18803f..08db690f0d46 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/docs/types/index.d.ts
@@ -23,12 +23,12 @@
 */
 interface Routine {
 	/**
-	* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+	* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 	*
 	* @param N - number of indexed elements
 	* @param alpha - constant
 	* @param x - input array
-	* @param stride - stride length
+	* @param strideX - stride length
 	* @returns sum
 	*
 	* @example
@@ -39,16 +39,16 @@ interface Routine {
 	* var v = dapxsumpw( x.length, 5.0, x, 1 );
 	* // returns 16.0
 	*/
-	( N: number, alpha: number, x: Float64Array, stride: number ): number;
+	( N: number, alpha: number, x: Float64Array, strideX: number ): number;
 
 	/**
-	* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
+	* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
 	*
 	* @param N - number of indexed elements
 	* @param alpha - constant
 	* @param x - input array
-	* @param stride - stride length
-	* @param offset - starting index
+	* @param strideX - stride length
+	* @param offsetX - starting index
 	* @returns sum
 	*
 	* @example
@@ -59,16 +59,16 @@ interface Routine {
 	* var v = dapxsumpw.ndarray( x.length, 5.0, x, 1, 0 );
 	* // returns 16.0
 	*/
-	ndarray( N: number, alpha: number, x: Float64Array, stride: number, offset: number ): number;
+	ndarray( N: number, alpha: number, x: Float64Array, strideX: number, offsetX: number ): number;
 }
 
 /**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 *
 * @param N - number of indexed elements
 * @param alpha - constant
 * @param x - input array
-* @param stride - stride length
+* @param strideX - stride length
 * @returns sum
 *
 * @example
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/c/example.c b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/c/example.c
index efc332d47ba3..6189ae27a568 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/c/example.c
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/c/example.c
@@ -25,10 +25,10 @@ int main( void ) {
 	const double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };
 
 	// Specify the number of elements:
-	const int64_t N = 4;
+	const int N = 4;
 
 	// Specify the stride length:
-	const int64_t stride = 2;
+	const int stride = 2;
 
 	// Compute the sum:
 	double v = stdlib_strided_dapxsumpw( N, 5.0, x, stride );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/index.js
index cec3a91b6029..2ccf8596b9f3 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/index.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/examples/index.js
@@ -18,11 +18,12 @@
 
 'use strict';
 
-var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
-var filledarrayBy = require( '@stdlib/array/filled-by' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var dapxsumpw = require( './../lib' );
 
-var x = filledarrayBy( 10, 'float64', discreteUniform( -100.0, 100.0 ) );
+var x = discreteUniform( 10, -100, 100, {
+	'dtype': 'float64'
+});
 console.log( x );
 
 var v = dapxsumpw( x.length, 5.0, x, 1 );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/include/stdlib/blas/ext/base/dapxsumpw.h b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/include/stdlib/blas/ext/base/dapxsumpw.h
index a1cdebb1f702..ebed136cd6ab 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/include/stdlib/blas/ext/base/dapxsumpw.h
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/include/stdlib/blas/ext/base/dapxsumpw.h
@@ -19,7 +19,7 @@
 #ifndef STDLIB_BLAS_EXT_BASE_DAPXSUMPW_H
 #define STDLIB_BLAS_EXT_BASE_DAPXSUMPW_H
 
-#include <stdint.h>
+#include "stdlib/blas/base/shared.h"
 
 /*
 * If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
@@ -31,7 +31,12 @@ extern "C" {
 /**
 * Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 */
-double stdlib_strided_dapxsumpw( const int64_t N, const double alpha, const double *X, const int64_t stride );
+double API_SUFFIX(stdlib_strided_dapxsumpw)( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX );
+
+/**
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation and alternative indexing semantics.
+*/
+double API_SUFFIX(stdlib_strided_dapxsumpw_ndarray)( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX, const CBLAS_INT offsetX );
 
 #ifdef __cplusplus
 }
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.js
index 1a41f4051a44..a68624f37ebd 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.js
@@ -20,13 +20,14 @@
 
 // MODULES //
 
-var sum = require( './ndarray.js' );
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var ndarray = require( './ndarray.js' );
 
 
 // MAIN //
 
 /**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 *
 * ## Method
 *
@@ -39,7 +40,7 @@ var sum = require( './ndarray.js' );
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} alpha - constant
 * @param {Float64Array} x - input array
-* @param {integer} stride - stride length
+* @param {integer} strideX - stride length
 * @returns {number} sum
 *
 * @example
@@ -51,32 +52,8 @@ var sum = require( './ndarray.js' );
 * var v = dapxsumpw( N, 5.0, x, 1 );
 * // returns 16.0
 */
-function dapxsumpw( N, alpha, x, stride ) {
-	var ix;
-	var s;
-	var i;
-
-	if ( N <= 0 ) {
-		return 0.0;
-	}
-	if ( N === 1 || stride === 0 ) {
-		return alpha + x[ 0 ];
-	}
-	if ( stride < 0 ) {
-		ix = (1-N) * stride;
-	} else {
-		ix = 0;
-	}
-	if ( N < 8 ) {
-		// Use simple summation...
-		s = 0.0;
-		for ( i = 0; i < N; i++ ) {
-			s += alpha + x[ ix ];
-			ix += stride;
-		}
-		return s;
-	}
-	return sum( N, alpha, x, stride, ix );
+function dapxsumpw( N, alpha, x, strideX ) {
+	return ndarray( N, alpha, x, strideX, stride2offset( N, strideX ) );
 }
 
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.native.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.native.js
index e0c525fa50a4..f0b23ea7bdb2 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/dapxsumpw.native.js
@@ -26,12 +26,12 @@ var addon = require( './../src/addon.node' );
 // MAIN //
 
 /**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 *
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} alpha - constant
 * @param {Float64Array} x - input array
-* @param {integer} stride - stride length
+* @param {integer} strideX - stride length
 * @returns {number} sum
 *
 * @example
@@ -43,8 +43,8 @@ var addon = require( './../src/addon.node' );
 * var v = dapxsumpw( N, 5.0, x, 1 );
 * // returns 16.0
 */
-function dapxsumpw( N, alpha, x, stride ) {
-	return addon( N, alpha, x, stride );
+function dapxsumpw( N, alpha, x, strideX ) {
+	return addon( N, alpha, x, strideX );
 }
 
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/index.js
index 499cccedcd61..2416dd2000f8 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/index.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/index.js
@@ -19,7 +19,7 @@
 'use strict';
 
 /**
-* Add a constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.
+* Add a scalar constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.
 *
 * @module @stdlib/blas/ext/base/dapxsumpw
 *
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.js
index 84c73a1aa964..730021624b51 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.js
@@ -32,7 +32,7 @@ var BLOCKSIZE = 128;
 // MAIN //
 
 /**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 *
 * ## Method
 *
@@ -45,8 +45,8 @@ var BLOCKSIZE = 128;
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} alpha - constant
 * @param {Float64Array} x - input array
-* @param {integer} stride - stride length
-* @param {NonNegativeInteger} offset - starting index
+* @param {integer} strideX - stride length
+* @param {NonNegativeInteger} offsetX - starting index
 * @returns {number} sum
 *
 * @example
@@ -57,7 +57,7 @@ var BLOCKSIZE = 128;
 * var v = dapxsumpw( 4, 5.0, x, 2, 1 );
 * // returns 25.0
 */
-function dapxsumpw( N, alpha, x, stride, offset ) {
+function dapxsumpw( N, alpha, x, strideX, offsetX ) {
 	var ix;
 	var s0;
 	var s1;
@@ -75,42 +75,42 @@ function dapxsumpw( N, alpha, x, stride, offset ) {
 	if ( N <= 0 ) {
 		return 0.0;
 	}
-	if ( N === 1 || stride === 0 ) {
-		return alpha + x[ offset ];
+	if ( N === 1 || strideX === 0 ) {
+		return alpha + x[ offsetX ];
 	}
-	ix = offset;
+	ix = offsetX;
 	if ( N < 8 ) {
 		// Use simple summation...
 		s = 0.0;
 		for ( i = 0; i < N; i++ ) {
 			s += alpha + x[ ix ];
-			ix += stride;
+			ix += strideX;
 		}
 		return s;
 	}
 	if ( N <= BLOCKSIZE ) {
 		// Sum a block with 8 accumulators (by loop unrolling, we lower the effective blocksize to 16)...
 		s0 = alpha + x[ ix ];
-		s1 = alpha + x[ ix+stride ];
-		s2 = alpha + x[ ix+(2*stride) ];
-		s3 = alpha + x[ ix+(3*stride) ];
-		s4 = alpha + x[ ix+(4*stride) ];
-		s5 = alpha + x[ ix+(5*stride) ];
-		s6 = alpha + x[ ix+(6*stride) ];
-		s7 = alpha + x[ ix+(7*stride) ];
-		ix += 8 * stride;
+		s1 = alpha + x[ ix+strideX ];
+		s2 = alpha + x[ ix+(2*strideX) ];
+		s3 = alpha + x[ ix+(3*strideX) ];
+		s4 = alpha + x[ ix+(4*strideX) ];
+		s5 = alpha + x[ ix+(5*strideX) ];
+		s6 = alpha + x[ ix+(6*strideX) ];
+		s7 = alpha + x[ ix+(7*strideX) ];
+		ix += 8 * strideX;
 
 		M = N % 8;
 		for ( i = 8; i < N-M; i += 8 ) {
 			s0 += alpha + x[ ix ];
-			s1 += alpha + x[ ix+stride ];
-			s2 += alpha + x[ ix+(2*stride) ];
-			s3 += alpha + x[ ix+(3*stride) ];
-			s4 += alpha + x[ ix+(4*stride) ];
-			s5 += alpha + x[ ix+(5*stride) ];
-			s6 += alpha + x[ ix+(6*stride) ];
-			s7 += alpha + x[ ix+(7*stride) ];
-			ix += 8 * stride;
+			s1 += alpha + x[ ix+strideX ];
+			s2 += alpha + x[ ix+(2*strideX) ];
+			s3 += alpha + x[ ix+(3*strideX) ];
+			s4 += alpha + x[ ix+(4*strideX) ];
+			s5 += alpha + x[ ix+(5*strideX) ];
+			s6 += alpha + x[ ix+(6*strideX) ];
+			s7 += alpha + x[ ix+(7*strideX) ];
+			ix += 8 * strideX;
 		}
 		// Pairwise sum the accumulators:
 		s = ((s0+s1) + (s2+s3)) + ((s4+s5) + (s6+s7));
@@ -118,14 +118,14 @@ function dapxsumpw( N, alpha, x, stride, offset ) {
 		// Clean-up loop...
 		for ( i; i < N; i++ ) {
 			s += alpha + x[ ix ];
-			ix += stride;
+			ix += strideX;
 		}
 		return s;
 	}
 	// Recurse by dividing by two, but avoiding non-multiples of unroll factor...
 	n = floor( N/2 );
 	n -= n % 8;
-	return dapxsumpw( n, alpha, x, stride, ix ) + dapxsumpw( N-n, alpha, x, stride, ix+(n*stride) ); // eslint-disable-line max-len
+	return dapxsumpw( n, alpha, x, strideX, ix ) + dapxsumpw( N-n, alpha, x, strideX, ix+(n*strideX) ); // eslint-disable-line max-len
 }
 
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.native.js b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.native.js
index bcb6732a593c..87e24f26695d 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/lib/ndarray.native.js
@@ -20,21 +20,19 @@
 
 // MODULES //
 
-var minViewBufferIndex = require( '@stdlib/strided/base/min-view-buffer-index' );
-var offsetView = require( '@stdlib/strided/base/offset-view' );
-var addon = require( './dapxsumpw.native.js' );
+var addon = require( './../src/addon.node' );
 
 
 // MAIN //
 
 /**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
 *
 * @param {PositiveInteger} N - number of indexed elements
 * @param {number} alpha - constant
 * @param {Float64Array} x - input array
-* @param {integer} stride - stride length
-* @param {NonNegativeInteger} offset - starting index
+* @param {integer} strideX - stride length
+* @param {NonNegativeInteger} offsetX - starting index
 * @returns {number} sum
 *
 * @example
@@ -45,11 +43,8 @@ var addon = require( './dapxsumpw.native.js' );
 * var v = dapxsumpw( 4, 5.0, x, 2, 1 );
 * // returns 25.0
 */
-function dapxsumpw( N, alpha, x, stride, offset ) {
-	var view;
-	offset = minViewBufferIndex( N, stride, offset );
-	view = offsetView( x, offset );
-	return addon( N, alpha, view, stride );
+function dapxsumpw( N, alpha, x, strideX, offsetX ) {
+	return addon.ndarray( N, alpha, x, strideX, offsetX );
 }
 
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/manifest.json b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/manifest.json
index da521f99aed6..03cac0d5594f 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/manifest.json
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/manifest.json
@@ -28,27 +28,28 @@
     {
       "task": "build",
       "src": [
-        "./src/dapxsumpw.c"
+        "./src/main.c"
       ],
       "include": [
         "./include"
       ],
-      "libraries": [
-        "-lm"
-      ],
+      "libraries": [],
       "libpath": [],
       "dependencies": [
+        "@stdlib/blas/base/shared",
+        "@stdlib/strided/base/stride2offset",
         "@stdlib/napi/export",
         "@stdlib/napi/argv",
         "@stdlib/napi/argv-int64",
         "@stdlib/napi/argv-double",
-        "@stdlib/napi/argv-strided-float64array"
+        "@stdlib/napi/argv-strided-float64array",
+        "@stdlib/napi/create-double"
       ]
     },
     {
       "task": "benchmark",
       "src": [
-        "./src/dapxsumpw.c"
+        "./src/main.c"
       ],
       "include": [
         "./include"
@@ -57,21 +58,25 @@
         "-lm"
       ],
       "libpath": [],
-      "dependencies": []
+      "dependencies": [
+        "@stdlib/blas/base/shared",
+        "@stdlib/strided/base/stride2offset"
+      ]
     },
     {
       "task": "examples",
       "src": [
-        "./src/dapxsumpw.c"
+        "./src/main.c"
       ],
       "include": [
         "./include"
       ],
-      "libraries": [
-        "-lm"
-      ],
+      "libraries": [],
       "libpath": [],
-      "dependencies": []
+      "dependencies": [
+        "@stdlib/blas/base/shared",
+        "@stdlib/strided/base/stride2offset"
+      ]
     }
   ]
 }
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/package.json b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/package.json
index 4594cdf846b0..450b6b540e30 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/package.json
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@stdlib/blas/ext/base/dapxsumpw",
   "version": "0.0.0",
-  "description": "Add a constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.",
+  "description": "Add a scalar constant to each double-precision floating-point strided array element and compute the sum using pairwise summation.",
   "license": "Apache-2.0",
   "author": {
     "name": "The Stdlib Authors",
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/addon.c b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/addon.c
index 34ac1da51700..77e94ec6758e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/addon.c
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/addon.c
@@ -18,13 +18,14 @@
 */
 
 #include "stdlib/blas/ext/base/dapxsumpw.h"
+#include "stdlib/blas/base/shared.h"
 #include "stdlib/napi/export.h"
 #include "stdlib/napi/argv.h"
 #include "stdlib/napi/argv_double.h"
 #include "stdlib/napi/argv_int64.h"
 #include "stdlib/napi/argv_strided_float64array.h"
+#include "stdlib/napi/create_double.h"
 #include <node_api.h>
-#include <assert.h>
 
 /**
 * Receives JavaScript callback invocation data.
@@ -37,14 +38,28 @@ static napi_value addon( napi_env env, napi_callback_info info ) {
 	STDLIB_NAPI_ARGV( env, info, argv, argc, 4 );
 	STDLIB_NAPI_ARGV_INT64( env, N, argv, 0 );
 	STDLIB_NAPI_ARGV_DOUBLE( env, alpha, argv, 1 );
-    STDLIB_NAPI_ARGV_INT64( env, stride, argv, 3 );
-	STDLIB_NAPI_ARGV_STRIDED_FLOAT64ARRAY( env, X, N, stride, argv, 2 );
-
-	napi_value v;
-	napi_status status = napi_create_double( env, stdlib_strided_dapxsumpw( N, alpha, X, stride ), &v );
-	assert( status == napi_ok );
+	STDLIB_NAPI_ARGV_INT64( env, strideX, argv, 3 );
+	STDLIB_NAPI_ARGV_STRIDED_FLOAT64ARRAY( env, X, N, strideX, argv, 2 );
+	STDLIB_NAPI_CREATE_DOUBLE( env, API_SUFFIX(stdlib_strided_dapxsumpw)( N, alpha, X, strideX ), v );
+	return v;
+}
 
+/**
+* Receives JavaScript callback invocation data.
+*
+* @param env    environment under which the function is invoked
+* @param info   callback data
+* @return       Node-API value
+*/
+static napi_value addon_method( napi_env env, napi_callback_info info ) {
+	STDLIB_NAPI_ARGV( env, info, argv, argc, 5 );
+	STDLIB_NAPI_ARGV_INT64( env, N, argv, 0 );
+	STDLIB_NAPI_ARGV_DOUBLE( env, alpha, argv, 1 );
+	STDLIB_NAPI_ARGV_INT64( env, strideX, argv, 3 );
+	STDLIB_NAPI_ARGV_INT64( env, offsetX, argv, 4 );
+	STDLIB_NAPI_ARGV_STRIDED_FLOAT64ARRAY( env, X, N, strideX, argv, 2 );
+	STDLIB_NAPI_CREATE_DOUBLE( env, API_SUFFIX(stdlib_strided_dapxsumpw_ndarray)( N, alpha, X, strideX, offsetX ), v );
 	return v;
 }
 
-STDLIB_NAPI_MODULE_EXPORT_FCN( addon ) 
+STDLIB_NAPI_MODULE_EXPORT_FCN_WITH_METHOD( addon, "ndarray", addon_method )
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/dapxsumpw.c b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/dapxsumpw.c
deleted file mode 100644
index 0a5dfbbe0dae..000000000000
--- a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/dapxsumpw.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2020 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-#include "stdlib/blas/ext/base/dapxsumpw.h"
-#include <stdint.h>
-
-/**
-* Adds a constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
-*
-* ## Method
-*
-* -   This implementation uses pairwise summation, which accrues rounding error `O(log2 N)` instead of `O(N)`. The recursion depth is also `O(log2 N)`.
-*
-* ## References
-*
-* -   Higham, Nicholas J. 1993. "The Accuracy of Floating Point Summation." _SIAM Journal on Scientific Computing_ 14 (4): 783–99. doi:[10.1137/0914050](https://doi.org/10.1137/0914050).
-*
-* @param N       number of indexed elements
-* @param alpha   constant
-* @param X       input array
-* @param stride  stride length
-* @return        output value
-*/
-double stdlib_strided_dapxsumpw( const int64_t N, const double alpha, const double *X, const int64_t stride ) {
-	double *xp1;
-	double *xp2;
-	double sum;
-	int64_t ix;
-	int64_t M;
-	int64_t n;
-	int64_t i;
-	double s0;
-	double s1;
-	double s2;
-	double s3;
-	double s4;
-	double s5;
-	double s6;
-	double s7;
-
-	if ( N <= 0 ) {
-		return 0.0;
-	}
-	if ( N == 1 || stride == 0 ) {
-		return alpha + X[ 0 ];
-	}
-	if ( stride < 0 ) {
-		ix = (1-N) * stride;
-	} else {
-		ix = 0;
-	}
-	if ( N < 8 ) {
-		// Use simple summation...
-		sum = 0.0;
-		for ( i = 0; i < N; i++ ) {
-			sum += alpha + X[ ix ];
-			ix += stride;
-		}
-		return sum;
-	}
-	// Blocksize for pairwise summation: 128 (NOTE: decreasing the blocksize decreases rounding error as more pairs are summed, but also decreases performance. Because the inner loop is unrolled eight times, the blocksize is effectively `16`.)
-	if ( N <= 128 ) {
-		// Sum a block with 8 accumulators (by loop unrolling, we lower the effective blocksize to 16)...
-		s0 = alpha + X[ ix ];
-		s1 = alpha + X[ ix+stride ];
-		s2 = alpha + X[ ix+(2*stride) ];
-		s3 = alpha + X[ ix+(3*stride) ];
-		s4 = alpha + X[ ix+(4*stride) ];
-		s5 = alpha + X[ ix+(5*stride) ];
-		s6 = alpha + X[ ix+(6*stride) ];
-		s7 = alpha + X[ ix+(7*stride) ];
-		ix += 8 * stride;
-
-		M = N % 8;
-		for ( i = 8; i < N-M; i += 8 ) {
-			s0 += alpha + X[ ix ];
-			s1 += alpha + X[ ix+stride ];
-			s2 += alpha + X[ ix+(2*stride) ];
-			s3 += alpha + X[ ix+(3*stride) ];
-			s4 += alpha + X[ ix+(4*stride) ];
-			s5 += alpha + X[ ix+(5*stride) ];
-			s6 += alpha + X[ ix+(6*stride) ];
-			s7 += alpha + X[ ix+(7*stride) ];
-			ix += 8 * stride;
-		}
-		// Pairwise sum the accumulators:
-		sum = ((s0+s1) + (s2+s3)) + ((s4+s5) + (s6+s7));
-
-		// Clean-up loop...
-		for (; i < N; i++ ) {
-			sum += alpha + X[ ix ];
-			ix += stride;
-		}
-		return sum;
-	}
-	// Recurse by dividing by two, but avoiding non-multiples of unroll factor...
-	n = N / 2;
-	n -= n % 8;
-	if ( stride < 0 ) {
-		xp1 = (double *)X + ( (n-N)*stride );
-		xp2 = (double *)X;
-	} else {
-		xp1 = (double *)X;
-		xp2 = (double *)X + ( n*stride );
-	}
-	return stdlib_strided_dapxsumpw( n, alpha, xp1, stride ) + stdlib_strided_dapxsumpw( N-n, alpha, xp2, stride );
-}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/main.c b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/main.c
new file mode 100644
index 000000000000..8966e002fc36
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/dapxsumpw/src/main.c
@@ -0,0 +1,134 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/blas/ext/base/dapxsumpw.h"
+#include "stdlib/blas/base/shared.h"
+#include "stdlib/strided/base/stride2offset.h"
+
+/**
+* Adds a scalar constant to each double-precision floating-point strided array element and computes the sum using pairwise summation.
+*
+* ## Method
+*
+* -   This implementation uses pairwise summation, which accrues rounding error `O(log2 N)` instead of `O(N)`. The recursion depth is also `O(log2 N)`.
+*
+* ## References
+*
+* -   Higham, Nicholas J. 1993. "The Accuracy of Floating Point Summation." _SIAM Journal on Scientific Computing_ 14 (4): 783–99. doi:[10.1137/0914050](https://doi.org/10.1137/0914050).
+*
+* @param N        number of indexed elements
+* @param alpha    scalar constant
+* @param X        input array
+* @param strideX  stride length
+* @return         output value
+*/
+double API_SUFFIX(stdlib_strided_dapxsumpw)( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX ) {
+	CBLAS_INT ox = stdlib_strided_stride2offset( N, strideX );
+	return API_SUFFIX(stdlib_strided_dapxsumpw_ndarray)( N, alpha, X, strideX, ox );
+}
+
+/**
+* Add a scalar constant to each double-precision floating-point strided array element and compute the sum using pairwise summation and alternative indexing semantics.
+*
+* ## Method
+*
+* -   This implementation uses pairwise summation, which accrues rounding error `O(log2 N)` instead of `O(N)`. The recursion depth is also `O(log2 N)`.
+*
+* ## References
+*
+* -   Higham, Nicholas J. 1993. "The Accuracy of Floating Point Summation." _SIAM Journal on Scientific Computing_ 14 (4): 783–99. doi:[10.1137/0914050](https://doi.org/10.1137/0914050).
+*
+* @param N        number of indexed elements
+* @param alpha    scalar constant
+* @param X        input array
+* @param strideX  index increment
+* @param offsetX  starting index
+* @return         output value
+*
+*/
+double API_SUFFIX(stdlib_strided_dapxsumpw_ndarray)( const CBLAS_INT N, const double alpha, const double *X, const CBLAS_INT strideX, const CBLAS_INT offsetX ) {
+	double sum;
+	CBLAS_INT ix;
+	CBLAS_INT M;
+	CBLAS_INT n;
+	CBLAS_INT i;
+	double s0;
+	double s1;
+	double s2;
+	double s3;
+	double s4;
+	double s5;
+	double s6;
+	double s7;
+
+	if ( N <= 0 ) {
+		return 0.0;
+	}
+	if ( N == 1 || strideX == 0 ) {
+		return alpha + X[ offsetX ];
+	}
+	ix = offsetX;
+	if ( N < 8 ) {
+		// Use simple summation...
+		sum = 0.0;
+		for ( i = 0; i < N; i++ ) {
+			sum += alpha + X[ ix ];
+			ix += strideX;
+		}
+		return sum;
+	}
+	// Blocksize for pairwise summation: 128 (NOTE: decreasing the blocksize decreases rounding error as more pairs are summed, but also decreases performance. Because the inner loop is unrolled eight times, the blocksize is effectively `16`.)
+	if ( N <= 128 ) {
+		// Sum a block with 8 accumulators (by loop unrolling, we lower the effective blocksize to 16)...
+		s0 = alpha + X[ ix ];
+		s1 = alpha + X[ ix+strideX ];
+		s2 = alpha + X[ ix+(2*strideX) ];
+		s3 = alpha + X[ ix+(3*strideX) ];
+		s4 = alpha + X[ ix+(4*strideX) ];
+		s5 = alpha + X[ ix+(5*strideX) ];
+		s6 = alpha + X[ ix+(6*strideX) ];
+		s7 = alpha + X[ ix+(7*strideX) ];
+		ix += 8 * strideX;
+
+		M = N % 8;
+		for ( i = 8; i < N-M; i += 8 ) {
+			s0 += alpha + X[ ix ];
+			s1 += alpha + X[ ix+strideX ];
+			s2 += alpha + X[ ix+(2*strideX) ];
+			s3 += alpha + X[ ix+(3*strideX) ];
+			s4 += alpha + X[ ix+(4*strideX) ];
+			s5 += alpha + X[ ix+(5*strideX) ];
+			s6 += alpha + X[ ix+(6*strideX) ];
+			s7 += alpha + X[ ix+(7*strideX) ];
+			ix += 8 * strideX;
+		}
+		// Pairwise sum the accumulators:
+		sum = ((s0+s1) + (s2+s3)) + ((s4+s5) + (s6+s7));
+
+		// Clean-up loop...
+		for (; i < N; i++ ) {
+			sum += alpha + X[ ix ];
+			ix += strideX;
+		}
+		return sum;
+	}
+	// Recurse by dividing by two, but avoiding non-multiples of unroll factor...
+	n = N / 2;
+	n -= n % 8;
+	return stdlib_strided_dapxsumpw_ndarray( n, alpha, X, strideX, ix ) + stdlib_strided_dapxsumpw_ndarray( N-n, alpha, X, strideX, ix+(n*strideX) );
+}