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* @license Apache-2.0
*
* Copyright (c) 2026 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 resolveTrans = require( '@stdlib/blas/base/transpose-operation-resolve-str' );
var resolveUplo = require( '@stdlib/blas/base/matrix-triangle-resolve-str' );
var format = require( '@stdlib/string/format' );
var base = require( './base.js' );
// MAIN //
/**
* Performs the matrix-matrix operation `uplo(C) = uplo(α*op(A)*op(B) + β*C)` where `op(X)` is either `op(X) = X` or `op(X) = X^T`, `α` and `β` are scalars, `A`, `B`, and `C` are matrices, with `op(A)` an `M` by `K` matrix, `op(B)` a `K` by `N` matrix, and `C` an `M` by `N` matrix, and only the elements in the upper or lower triangle of `C` are updated.
*
* @param {(integer|string)} uplo - specifies whether to update the upper or lower triangular part of `C`
* @param {(integer|string)} transA - specifies whether `A` should be transposed, conjugate-transposed, or not transposed
* @param {(integer|string)} transB - specifies whether `B` should be transposed, conjugate-transposed, or not transposed
* @param {NonNegativeInteger} M - number of rows in the matrix `op(A)` and in the matrix `C`
* @param {NonNegativeInteger} N - number of columns in the matrix `op(B)` and in the matrix `C`
* @param {NonNegativeInteger} K - number of columns in the matrix `op(A)` and number of rows in the matrix `op(B)`
* @param {number} alpha - scalar constant
* @param {Float32Array} A - first matrix
* @param {integer} strideA1 - stride of the first dimension of `A`
* @param {integer} strideA2 - stride of the second dimension of `A`
* @param {NonNegativeInteger} offsetA - starting index for `A`
* @param {Float32Array} B - second matrix
* @param {integer} strideB1 - stride of the first dimension of `B`
* @param {integer} strideB2 - stride of the second dimension of `B`
* @param {NonNegativeInteger} offsetB - starting index for `B`
* @param {number} beta - scalar constant
* @param {Float32Array} C - third matrix
* @param {integer} strideC1 - stride of the first dimension of `C`
* @param {integer} strideC2 - stride of the second dimension of `C`
* @param {NonNegativeInteger} offsetC - starting index for `C`
* @throws {TypeError} first argument must specify whether to reference the lower or upper triangular matrix
* @throws {TypeError} second argument must be a valid transpose operation
* @throws {TypeError} third argument must be a valid transpose operation
* @throws {RangeError} fourth argument must be a nonnegative integer
* @throws {RangeError} fifth argument must be a nonnegative integer
* @throws {RangeError} sixth argument must be a nonnegative integer
* @throws {RangeError} eighteenth argument must be non-zero
* @throws {RangeError} nineteenth argument must be non-zero
* @returns {Float32Array} `C`
*
* @example
* var Float32Array = require( '@stdlib/array/float32' );
*
* var A = new Float32Array( [ 1.0, 2.0, 3.0, 4.0 ] );
* var B = new Float32Array( [ 1.0, 1.0, 0.0, 1.0 ] );
* var C = new Float32Array( [ 1.0, 2.0, 3.0, 4.0 ] );
*
* sgemmtr( 'upper', 'no-transpose', 'no-transpose', 2, 2, 2, 1.0, A, 2, 1, 0, B, 2, 1, 0, 1.0, C, 2, 1, 0 );
* // C => <Float32Array>[ 2.0, 5.0, 3.0, 11.0 ]
*/
function sgemmtr( uplo, transA, transB, M, N, K, alpha, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB, beta, C, strideC1, strideC2, offsetC ) { // eslint-disable-line max-params, max-len
var ta;
var tb;
var u;
u = resolveUplo( uplo );
if ( u === null ) {
throw new TypeError( format( 'invalid argument. First argument must specify whether to reference the lower or upper triangular matrix. Value: `%s`.', uplo ) );
}
ta = resolveTrans( transA );
if ( ta === null ) {
throw new TypeError( format( 'invalid argument. Second argument must be a valid transpose operation. Value: `%s`.', transA ) );
}
tb = resolveTrans( transB );
if ( tb === null ) {
throw new TypeError( format( 'invalid argument. Third argument must be a valid transpose operation. Value: `%s`.', transB ) );
}
if ( M < 0 ) {
throw new RangeError( format( 'invalid argument. Fourth argument must be a nonnegative integer. Value: `%d`.', M ) );
}
if ( N < 0 ) {
throw new RangeError( format( 'invalid argument. Fifth argument must be a nonnegative integer. Value: `%d`.', N ) );
}
if ( K < 0 ) {
throw new RangeError( format( 'invalid argument. Sixth argument must be a nonnegative integer. Value: `%d`.', K ) );
}
if ( strideC1 === 0 ) {
throw new RangeError( format( 'invalid argument. Eighteenth argument must be non-zero. Value: `%d`.', strideC1 ) );
}
if ( strideC2 === 0 ) {
throw new RangeError( format( 'invalid argument. Nineteenth argument must be non-zero. Value: `%d`.', strideC2 ) );
}
return base( u, ta, tb, M, N, K, alpha, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB, beta, C, strideC1, strideC2, offsetC ); // eslint-disable-line max-len
}
// EXPORTS //
module.exports = sgemmtr;
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