Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 49x 49x 4x 4x 49x 4x 4x 49x 4x 4x 49x 4x 4x 49x 3x 3x 49x 6x 6x 49x 1x 1x 23x 49x 2x 2x 21x 21x 49x 2x 2x 2x 2x 2x | /**
* @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 isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var isMatrixTriangle = require( '@stdlib/blas/base/assert/is-matrix-triangle' );
var isTransposeOperation = require( '@stdlib/blas/base/assert/is-transpose-operation' );
var isDiagonal = require( '@stdlib/blas/base/assert/is-diagonal-type' );
var resolveOrder = require( '@stdlib/blas/base/layout-resolve-enum' );
var resolveUplo = require( '@stdlib/blas/base/matrix-triangle-resolve-enum' );
var resolveTrans = require( '@stdlib/blas/base/transpose-operation-resolve-enum' );
var resolveDiag = require( '@stdlib/blas/base/diagonal-type-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 one of the matrix-vector operations `x = A*x` or `x = A^T*x`, where `x` is an `N` element vector and `A` is an `N` by `N` unit, or non-unit, upper or lower triangular matrix.
*
* @param {string} order - storage layout
* @param {string} uplo - specifies whether `A` is an upper or lower triangular matrix
* @param {string} trans - specifies whether `A` should be transposed, conjugate-transposed, or not transposed
* @param {string} diag - specifies whether `A` has a unit diagonal
* @param {NonNegativeInteger} N - number of elements along each dimension of `A`
* @param {Float64Array} A - input matrix
* @param {integer} LDA - stride of the first dimension of `A` (a.k.a., leading dimension of the matrix `A`)
* @param {Float64Array} x - input vector
* @param {integer} strideX - `x` stride length
* @throws {TypeError} first argument must be a valid order
* @throws {TypeError} second argument must specify whether a lower or upper triangular matrix is supplied
* @throws {TypeError} third argument must be a valid transpose operation
* @throws {TypeError} fourth argument must be a valid diagonal type
* @throws {RangeError} fifth argument must be a nonnegative integer
* @throws {RangeError} seventh argument must be a valid stride
* @throws {RangeError} ninth argument must be non-zero
* @returns {Float64Array} `x`
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 0.0, 1.0, 2.0, 0.0, 0.0, 1.0 ] ); // => [ [ 1.0, 2.0, 3.0 ], [ 0.0, 1.0, 2.0 ], [ 0.0, 0.0, 1.0 ] ]
* var x = new Float64Array( [ 1.0, 2.0, 3.0 ] );
*
* dtrmv( 'row-major', 'upper', 'no-transpose', 'unit', 3, A, 3, x, 1 );
* // x => <Float64Array>[ 14.0, 8.0, 3.0 ]
*/
function dtrmv( order, uplo, trans, diag, N, A, LDA, x, strideX ) {
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( !isMatrixTriangle( uplo ) ) {
throw new TypeError( format( 'invalid argument. Second argument must specify whether the lower or upper triangular matrix is supplied. Value: `%s`.', uplo ) );
}
if ( !isTransposeOperation( trans ) ) {
throw new TypeError( format( 'invalid argument. Third argument must be a valid transpose operation. Value: `%s`.', trans ) );
}
if ( !isDiagonal( diag ) ) {
throw new TypeError( format( 'invalid argument. Fourth argument must be a valid diagonal type. Value: `%s`.', diag ) );
}
if ( N < 0 ) {
throw new RangeError( format( 'invalid argument. Fifth argument must be a nonnegative integer. Value: `%d`.', N ) );
}
if ( LDA < max( 1, N ) ) {
throw new RangeError( format( 'invalid argument. Seventh argument must be greater than or equal to max(1,%d). Value: `%d`.', N, LDA ) );
}
if ( strideX === 0 ) {
throw new RangeError( format( 'invalid argument. Ninth argument must be non-zero. Value: `%d`.', strideX ) );
}
// Check if we can early return...
if ( N === 0 ) {
return x;
}
addon( resolveOrder( order ), resolveUplo( uplo ), resolveTrans( trans ), resolveDiag( diag ), N, A, LDA, x, strideX ); // eslint-disable-line max-len
return x;
}
// EXPORTS //
module.exports = dtrmv;
|