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* @license Apache-2.0
*
* Copyright (c) 2025 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.
*/
'use strict';
// MODULES //
var isColumnMajor = require( '@stdlib/ndarray/base/assert/is-column-major-string' );
var isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var resolve = require( '@stdlib/blas/base/layout-resolve-enum' );
var max = require( '@stdlib/math/base/special/fast/max' );
var format = require( '@stdlib/string/format' );
var addon = require( './../src/addon.node' );
// MAIN //
/**
* Performs the rank 1 operation `A = α*x*y^T + A`, where `α` is a scalar, `x` is an `M` element vector, `y` is an `N` element vector, and `A` is an `M` by `N` matrix.
*
* @param {string} order - storage layout
* @param {NonNegativeInteger} M - number of rows in the matrix `A`
* @param {NonNegativeInteger} N - number of columns in the matrix `A`
* @param {number} alpha - scalar constant
* @param {Float32Array} x - first input vector
* @param {integer} strideX - `x` stride length
* @param {Float32Array} y - second input vector
* @param {integer} strideY - `y` stride length
* @param {Float32Array} A - matrix of coefficients
* @param {PositiveInteger} LDA - stride of the first dimension of `A` (a.k.a., leading dimension of the matrix `A`)
* @throws {TypeError} first argument must be a valid order
* @throws {RangeError} second argument must be a nonnegative integer
* @throws {RangeError} third argument must be a nonnegative integer
* @throws {RangeError} sixth argument must be non-zero
* @throws {RangeError} eighth argument must be non-zero
* @throws {RangeError} tenth argument must be a valid stride
* @returns {Float32Array} `A`
*
* @example
* var Float32Array = require( '@stdlib/array/float32' );
*
* var A = new Float32Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
* var x = new Float32Array( [ 1.0, 1.0 ] );
* var y = new Float32Array( [ 1.0, 1.0, 1.0 ] );
*
* sger( 'row-major', 2, 3, 1.0, x, 1, y, 1, A, 3 );
* // A => <Float32Array>[ 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 ]
*/
function sger( order, M, N, alpha, x, strideX, y, strideY, A, LDA ) {
var vala;
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( M < 0 ) {
throw new RangeError( format( 'invalid argument. Second argument must be a nonnegative integer. Value: `%d`.', M ) );
}
if ( N < 0 ) {
throw new RangeError( format( 'invalid argument. Third argument must be a nonnegative integer. Value: `%d`.', N ) );
}
if ( strideX === 0 ) {
throw new RangeError( format( 'invalid argument. Sixth argument must be non-zero. Value: `%d`.', strideX ) );
}
if ( strideY === 0 ) {
throw new RangeError( format( 'invalid argument. Eighth argument must be non-zero. Value: `%d`.', strideY ) );
}
if ( isColumnMajor( order ) ) {
vala = M;
} else {
vala = N;
}
if ( LDA < max( 1, vala ) ) {
throw new RangeError( format( 'invalid argument. Tenth argument must be greater than or equal to max(1,%d). Value: `%d`.', vala, LDA ) );
}
// Check if we can early return...
if ( M === 0 || N === 0 || alpha === 0.0 ) {
return A;
}
addon( resolve( order ), M, N, alpha, x, strideX, y, strideY, A, LDA );
return A;
}
// EXPORTS //
module.exports = sger;
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